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- Add support for the hugetlb_cma command line option to allocate gigantic

Browse Source 
hugepages using CMA:
 
 - Add arch_get_random_long() support.
 
 - Add ap bus userspace notifications.
 
 - Increase default size of vmalloc area to 512GB and otherwise let it increase
   dynamically by the size of physical memory. This should fix all occurrences
   where the vmalloc area was not large enough.
 
 - Completely get rid of set_fs() (aka select SET_FS) and rework address space
   handling while doing that; making address space handling much more simple.
 
 - Reimplement getcpu vdso syscall in C.
 
 - Add support for extended SCLP responses (> 4k). This allows e.g. to handle
   also potential large system configurations.
 
 - Simplify KASAN by removing 3-level page table support and only supporting
   4-levels from now on.
 
 - Improve debug-ability of the kernel decompressor code, which now prints also
   stack traces and symbols in case of problems to the console.
 
 - Remove more power management leftovers.
 
 - Other various fixes and improvements all over the place.
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Merge tag 's390-5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Heiko Carstens:

 - Add support for the hugetlb_cma command line option to allocate
   gigantic hugepages using CMA

 - Add arch_get_random_long() support.

 - Add ap bus userspace notifications.

 - Increase default size of vmalloc area to 512GB and otherwise let it
   increase dynamically by the size of physical memory. This should fix
   all occurrences where the vmalloc area was not large enough.

 - Completely get rid of set_fs() (aka select SET_FS) and rework address
   space handling while doing that; making address space handling much
   more simple.

 - Reimplement getcpu vdso syscall in C.

 - Add support for extended SCLP responses (> 4k). This allows e.g. to
   handle also potential large system configurations.

 - Simplify KASAN by removing 3-level page table support and only
   supporting 4-levels from now on.

 - Improve debug-ability of the kernel decompressor code, which now
   prints also stack traces and symbols in case of problems to the
   console.

 - Remove more power management leftovers.

 - Other various fixes and improvements all over the place.

* tag 's390-5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (62 commits)
  s390/mm: add support to allocate gigantic hugepages using CMA
  s390/crypto: add arch_get_random_long() support
  s390/smp: perform initial CPU reset also for SMT siblings
  s390/mm: use invalid asce for user space when switching to init_mm
  s390/idle: fix accounting with machine checks
  s390/idle: add missing mt_cycles calculation
  s390/boot: add build-id to decompressor
  s390/kexec_file: fix diag308 subcode when loading crash kernel
  s390/cio: fix use-after-free in ccw_device_destroy_console
  s390/cio: remove pm support from ccw bus driver
  s390/cio: remove pm support from css-bus driver
  s390/cio: remove pm support from IO subchannel drivers
  s390/cio: remove pm support from chsc subchannel driver
  s390/vmur: remove unused pm related functions
  s390/tape: remove unsupported PM functions
  s390/cio: remove pm support from eadm-sch drivers
  s390: remove pm support from console drivers
  s390/dasd: remove unused pm related functions
  s390/zfcp: remove pm support from zfcp driver
  s390/ap: let bus_register() add the AP bus sysfs attributes
  ...
This commit is contained in:
Linus Torvalds 2020-12-14 16:22:26 -08:00
commit 586592478b
107 changed files with 1283 additions and 2008 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/s390/Kconfig
View File

@ -53,8 +53,7 @@ config ARCH_SUPPORTS_UPROBES
config KASAN_SHADOW_OFFSET
hex
depends on KASAN
default 0x18000000000000 if KASAN_S390_4_LEVEL_PAGING
default 0x30000000000
default 0x18000000000000
config S390
def_bool y
@ -191,7 +190,6 @@ config S390
select PCI_DOMAINS if PCI
select PCI_MSI if PCI
select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
select SET_FS
select SPARSE_IRQ
select SYSCTL_EXCEPTION_TRACE
select THREAD_INFO_IN_TASK
@ -714,7 +712,7 @@ if PCI
config PCI_NR_FUNCTIONS
int "Maximum number of PCI functions (1-4096)"
range 1 4096
default "128"
default "512"
help
This allows you to specify the maximum number of PCI functions which
this kernel will support.

8
arch/s390/Kconfig.debug
View File

@ -5,3 +5,11 @@ config TRACE_IRQFLAGS_SUPPORT
config EARLY_PRINTK
def_bool y
config DEBUG_USER_ASCE
bool "Debug User ASCE"
help
Check on exit to user space that address space control
elements are setup correctly.
If unsure, say N.

2
arch/s390/Makefile
View File

@ -25,7 +25,7 @@ KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__
KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2
KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float
KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain
KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding
KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)

18
arch/s390/boot/boot.h
View File

@ -2,20 +2,32 @@
#ifndef BOOT_BOOT_H
#define BOOT_BOOT_H
#include <linux/types.h>
#define BOOT_STACK_OFFSET 0x8000
#ifndef __ASSEMBLY__
#include <linux/compiler.h>
void startup_kernel(void);
void detect_memory(void);
unsigned long detect_memory(void);
bool is_ipl_block_dump(void);
void store_ipl_parmblock(void);
void setup_boot_command_line(void);
void parse_boot_command_line(void);
void setup_memory_end(void);
void verify_facilities(void);
void print_missing_facilities(void);
void print_pgm_check_info(void);
unsigned long get_random_base(unsigned long safe_addr);
void __printf(1, 2) decompressor_printk(const char *fmt, ...);
extern int kaslr_enabled;
extern const char kernel_version[];
extern unsigned long memory_limit;
extern int vmalloc_size_set;
extern int kaslr_enabled;
unsigned long read_ipl_report(unsigned long safe_offset);
#endif /* __ASSEMBLY__ */
#endif /* BOOT_BOOT_H */

1
arch/s390/boot/compressed/.gitignore vendored
View File

@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
vmlinux
vmlinux.lds
vmlinux.syms

26
arch/s390/boot/compressed/Makefile
View File

@ -10,21 +10,39 @@ GCOV_PROFILE := n
UBSAN_SANITIZE := n
KASAN_SANITIZE := n
obj-y := $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) piggy.o info.o
obj-y := $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) info.o
obj-all := $(obj-y) piggy.o syms.o
targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
targets += info.bin $(obj-y)
targets += info.bin syms.bin vmlinux.syms $(obj-all)
KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
OBJCOPYFLAGS :=
OBJECTS := $(addprefix $(obj)/,$(obj-y))
OBJECTS_ALL := $(addprefix $(obj)/,$(obj-all))
LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup -T
$(obj)/vmlinux: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS) FORCE
LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup --build-id=sha1 -T
$(obj)/vmlinux: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS_ALL) FORCE
$(call if_changed,ld)
LDFLAGS_vmlinux.syms := --oformat $(LD_BFD) -e startup -T
$(obj)/vmlinux.syms: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS) FORCE
$(call if_changed,ld)
quiet_cmd_dumpsyms = DUMPSYMS $<
define cmd_dumpsyms
$(NM) -n -S --format=bsd "$<" | $(PERL) -ne '/(\w+)\s+(\w+)\s+[tT]\s+(\w+)/ and printf "%x %x %s\0",hex $$1,hex $$2,$$3' > "$@"
endef
$(obj)/syms.bin: $(obj)/vmlinux.syms FORCE
$(call if_changed,dumpsyms)
OBJCOPYFLAGS_syms.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.decompressor.syms
$(obj)/syms.o: $(obj)/syms.bin FORCE
$(call if_changed,objcopy)
OBJCOPYFLAGS_info.bin := -O binary --only-section=.vmlinux.info --set-section-flags .vmlinux.info=load
$(obj)/info.bin: vmlinux FORCE
$(call if_changed,objcopy)

4
arch/s390/boot/compressed/decompressor.h
View File

@ -2,8 +2,10 @@
#ifndef BOOT_COMPRESSED_DECOMPRESSOR_H
#define BOOT_COMPRESSED_DECOMPRESSOR_H
#include <linux/stddef.h>
#ifdef CONFIG_KERNEL_UNCOMPRESSED
static inline void *decompress_kernel(void) {}
static inline void *decompress_kernel(void) { return NULL; }
#else
void *decompress_kernel(void);
#endif

9
arch/s390/boot/compressed/vmlinux.lds.S
View File

@ -27,6 +27,7 @@ SECTIONS
*(.rodata.*)
_erodata = . ;
}
NOTES
.data : {
_data = . ;
*(.data)
@ -82,6 +83,14 @@ SECTIONS
*(.vmlinux.info)
}
.decompressor.syms : {
. += 1; /* make sure we have \0 before the first entry */
. = ALIGN(2);
_decompressor_syms_start = .;
*(.decompressor.syms)
_decompressor_syms_end = .;
}
#ifdef CONFIG_KERNEL_UNCOMPRESSED
. = 0x100000;
#else

32
arch/s390/boot/head.S
View File

@ -28,6 +28,7 @@
#include <asm/thread_info.h>
#include <asm/page.h>
#include <asm/ptrace.h>
#include "boot.h"
#define ARCH_OFFSET 4
@ -62,8 +63,12 @@ __HEAD
.org __LC_RST_NEW_PSW # 0x1a0
.quad 0,iplstart
.org __LC_EXT_NEW_PSW # 0x1b0
.quad 0x0002000180000000,0x1b0 # disabled wait
.org __LC_PGM_NEW_PSW # 0x1d0
.quad 0x0000000180000000,startup_pgm_check_handler
.org __LC_IO_NEW_PSW # 0x1f0
.quad 0x0002000180000000,0x1f0 # disabled wait
.org 0x200
@ -275,8 +280,8 @@ iplstart:
# or linload or SALIPL
#
.org 0x10000
ENTRY(startup)
j .Lep_startup_normal
SYM_CODE_START(startup)
j startup_normal
.org EP_OFFSET
#
# This is a list of s390 kernel entry points. At address 0x1000f the number of
@ -290,9 +295,9 @@ ENTRY(startup)
# kdump startup-code at 0x10010, running in 64 bit absolute addressing mode
#
.org 0x10010
ENTRY(startup_kdump)
j .Lep_startup_kdump
.Lep_startup_normal:
j startup_kdump
SYM_CODE_END(startup)
SYM_CODE_START_LOCAL(startup_normal)
mvi __LC_AR_MODE_ID,1 # set esame flag
slr %r0,%r0 # set cpuid to zero
lhi %r1,2 # mode 2 = esame (dump)
@ -303,6 +308,9 @@ ENTRY(startup_kdump)
sam64 # switch to 64 bit addressing mode
basr %r13,0 # get base
.LPG0:
mvc __LC_EXT_NEW_PSW(16),.Lext_new_psw-.LPG0(%r13)
mvc __LC_PGM_NEW_PSW(16),.Lpgm_new_psw-.LPG0(%r13)
mvc __LC_IO_NEW_PSW(16),.Lio_new_psw-.LPG0(%r13)
xc 0x200(256),0x200 # partially clear lowcore
xc 0x300(256),0x300
xc 0xe00(256),0xe00
@ -315,12 +323,18 @@ ENTRY(startup_kdump)
l %r15,.Lstack-.LPG0(%r13)
brasl %r14,verify_facilities
brasl %r14,startup_kernel
SYM_CODE_END(startup_normal)
.Lstack:
.long 0x8000 + (1<<(PAGE_SHIFT+BOOT_STACK_ORDER)) - STACK_FRAME_OVERHEAD
.long BOOT_STACK_OFFSET + BOOT_STACK_SIZE - STACK_FRAME_OVERHEAD
.align 8
6: .long 0x7fffffff,0xffffffff
.Lext_new_psw:
.quad 0x0002000180000000,0x1b0 # disabled wait
.Lpgm_new_psw:
.quad 0x0000000180000000,startup_pgm_check_handler
.Lio_new_psw:
.quad 0x0002000180000000,0x1f0 # disabled wait
.Lctl: .quad 0x04040000 # cr0: AFP registers & secondary space
.quad 0 # cr1: primary space segment table
.quad .Lduct # cr2: dispatchable unit control table
@ -359,7 +373,7 @@ ENTRY(startup_kdump)
# It simply saves general/control registers and psw in
# the save area and does disabled wait with a faulty address.
#
ENTRY(startup_pgm_check_handler)
SYM_CODE_START_LOCAL(startup_pgm_check_handler)
stmg %r8,%r15,__LC_SAVE_AREA_SYNC
la %r8,4095
stctg %c0,%c15,__LC_CREGS_SAVE_AREA-4095(%r8)
@ -378,9 +392,9 @@ ENTRY(startup_pgm_check_handler)
la %r8,4095
lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r8)
lpswe __LC_RETURN_PSW # disabled wait
SYM_CODE_END(startup_pgm_check_handler)
.Ldump_info_stack:
.long 0x5000 + PAGE_SIZE - STACK_FRAME_OVERHEAD
ENDPROC(startup_pgm_check_handler)
#
# params at 10400 (setup.h)

8
arch/s390/boot/head_kdump.S
View File

@ -19,8 +19,7 @@
# Note: This code has to be position independent
#
.align 2
.Lep_startup_kdump:
SYM_CODE_START_LOCAL(startup_kdump)
lhi %r1,2 # mode 2 = esame (dump)
sigp %r1,%r0,SIGP_SET_ARCHITECTURE # Switch to esame mode
sam64 # Switch to 64 bit addressing
@ -87,14 +86,15 @@
startup_kdump_relocated:
basr %r13,0
0: lpswe .Lrestart_psw-0b(%r13) # Start new kernel...
SYM_CODE_END(startup_kdump)
.align 8
.Lrestart_psw:
.quad 0x0000000080000000,0x0000000000000000 + startup
#else
.align 2
.Lep_startup_kdump:
SYM_CODE_START_LOCAL(startup_kdump)
larl %r13,startup_kdump_crash
lpswe 0(%r13)
SYM_CODE_END(startup_kdump)
.align 8
startup_kdump_crash:
.quad 0x0002000080000000,0x0000000000000000 + startup_kdump_crash

49
arch/s390/boot/ipl_parm.c
View File

@ -17,10 +17,10 @@ int __bootdata_preserved(ipl_block_valid);
unsigned int __bootdata_preserved(zlib_dfltcc_support) = ZLIB_DFLTCC_FULL;
unsigned long __bootdata(vmalloc_size) = VMALLOC_DEFAULT_SIZE;
unsigned long __bootdata(memory_end);
int __bootdata(memory_end_set);
int __bootdata(noexec_disabled);
unsigned long memory_limit;
int vmalloc_size_set;
int kaslr_enabled;
static inline int __diag308(unsigned long subcode, void *addr)
@ -57,6 +57,17 @@ void store_ipl_parmblock(void)
ipl_block_valid = 1;
}
bool is_ipl_block_dump(void)
{
if (ipl_block.pb0_hdr.pbt == IPL_PBT_FCP &&
ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP)
return true;
if (ipl_block.pb0_hdr.pbt == IPL_PBT_NVME &&
ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP)
return true;
return false;
}
static size_t scpdata_length(const u8 *buf, size_t count)
{
while (count) {
@ -237,13 +248,13 @@ void parse_boot_command_line(void)
while (*args) {
args = next_arg(args, &param, &val);
if (!strcmp(param, "mem") && val) {
memory_end = round_down(memparse(val, NULL), PAGE_SIZE);
memory_end_set = 1;
}
if (!strcmp(param, "mem") && val)
memory_limit = round_down(memparse(val, NULL), PAGE_SIZE);
if (!strcmp(param, "vmalloc") && val)
if (!strcmp(param, "vmalloc") && val) {
vmalloc_size = round_up(memparse(val, NULL), PAGE_SIZE);
vmalloc_size_set = 1;
}
if (!strcmp(param, "dfltcc") && val) {
if (!strcmp(val, "off"))
@ -279,27 +290,3 @@ void parse_boot_command_line(void)
#endif
}
}
static inline bool is_ipl_block_dump(void)
{
if (ipl_block.pb0_hdr.pbt == IPL_PBT_FCP &&
ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP)
return true;
if (ipl_block.pb0_hdr.pbt == IPL_PBT_NVME &&
ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP)
return true;
return false;
}
void setup_memory_end(void)
{
#ifdef CONFIG_CRASH_DUMP
if (OLDMEM_BASE) {
kaslr_enabled = 0;
} else if (ipl_block_valid && is_ipl_block_dump()) {
kaslr_enabled = 0;
if (!sclp_early_get_hsa_size(&memory_end) && memory_end)
memory_end_set = 1;
}
#endif
}

33
arch/s390/boot/kaslr.c
View File

@ -7,6 +7,7 @@
#include <asm/cpacf.h>
#include <asm/timex.h>
#include <asm/sclp.h>
#include <asm/kasan.h>
#include "compressed/decompressor.h"
#include "boot.h"
@ -176,8 +177,14 @@ unsigned long get_random_base(unsigned long safe_addr)
unsigned long kasan_needs;
int i;
if (memory_end_set)
memory_limit = min(memory_limit, memory_end);
memory_limit = min(memory_limit, ident_map_size);
/*
* Avoid putting kernel in the end of physical memory
* which kasan will use for shadow memory and early pgtable
* mapping allocations.
*/
memory_limit -= kasan_estimate_memory_needs(memory_limit);
if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && INITRD_START && INITRD_SIZE) {
if (safe_addr < INITRD_START + INITRD_SIZE)
@ -185,28 +192,6 @@ unsigned long get_random_base(unsigned long safe_addr)
}
safe_addr = ALIGN(safe_addr, THREAD_SIZE);
if ((IS_ENABLED(CONFIG_KASAN))) {
/*
* Estimate kasan memory requirements, which it will reserve
* at the very end of available physical memory. To estimate
* that, we take into account that kasan would require
* 1/8 of available physical memory (for shadow memory) +
* creating page tables for the whole memory + shadow memory
* region (1 + 1/8). To keep page tables estimates simple take
* the double of combined ptes size.
*/
memory_limit = get_mem_detect_end();
if (memory_end_set && memory_limit > memory_end)
memory_limit = memory_end;
/* for shadow memory */
kasan_needs = memory_limit / 8;
/* for paging structures */
kasan_needs += (memory_limit + kasan_needs) / PAGE_SIZE /
_PAGE_ENTRIES * _PAGE_TABLE_SIZE * 2;
memory_limit -= kasan_needs;
}
kernel_size = vmlinux.image_size + vmlinux.bss_size;
if (safe_addr + kernel_size > memory_limit)
return 0;

13
arch/s390/boot/mem_detect.c
View File

@ -8,7 +8,6 @@
#include "compressed/decompressor.h"
#include "boot.h"
unsigned long __bootdata(max_physmem_end);
struct mem_detect_info __bootdata(mem_detect);
/* up to 256 storage elements, 1020 subincrements each */
@ -149,27 +148,29 @@ static void search_mem_end(void)
add_mem_detect_block(0, (offset + 1) << 20);
}
void detect_memory(void)
unsigned long detect_memory(void)
{
unsigned long max_physmem_end;
sclp_early_get_memsize(&max_physmem_end);
if (!sclp_early_read_storage_info()) {
mem_detect.info_source = MEM_DETECT_SCLP_STOR_INFO;
return;
return max_physmem_end;
}
if (!diag260()) {
mem_detect.info_source = MEM_DETECT_DIAG260;
return;
return max_physmem_end;
}
if (max_physmem_end) {
add_mem_detect_block(0, max_physmem_end);
mem_detect.info_source = MEM_DETECT_SCLP_READ_INFO;
return;
return max_physmem_end;
}
search_mem_end();
mem_detect.info_source = MEM_DETECT_BIN_SEARCH;
max_physmem_end = get_mem_detect_end();
return get_mem_detect_end();
}

238
arch/s390/boot/pgm_check_info.c
View File

@ -1,99 +1,181 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <asm/stacktrace.h>
#include <asm/boot_data.h>
#include <asm/lowcore.h>
#include <asm/setup.h>
#include <asm/sclp.h>
#include <asm/uv.h>
#include <stdarg.h>
#include "boot.h"
const char hex_asc[] = "0123456789abcdef";
#define add_val_as_hex(dst, val) \
__add_val_as_hex(dst, (const unsigned char *)&val, sizeof(val))
static char *__add_val_as_hex(char *dst, const unsigned char *src, size_t count)
static char *as_hex(char *dst, unsigned long val, int pad)
{
while (count--)
dst = hex_byte_pack(dst, *src++);
return dst;
char *p, *end = p = dst + max(pad, (int)__fls(val | 1) / 4 + 1);
for (*p-- = 0; p >= dst; val >>= 4)
*p-- = hex_asc[val & 0x0f];
return end;
}
static char *add_str(char *dst, char *src)
static char *symstart(char *p)
{
strcpy(dst, src);
return dst + strlen(dst);
while (*p)
p--;
return p + 1;
}
extern char _decompressor_syms_start[], _decompressor_syms_end[];
static noinline char *findsym(unsigned long ip, unsigned short *off, unsigned short *len)
{
/* symbol entries are in a form "10000 c4 startup\0" */
char *a = _decompressor_syms_start;
char *b = _decompressor_syms_end;
unsigned long start;
unsigned long size;
char *pivot;
char *endp;
while (a < b) {
pivot = symstart(a + (b - a) / 2);
start = simple_strtoull(pivot, &endp, 16);
size = simple_strtoull(endp + 1, &endp, 16);
if (ip < start) {
b = pivot;
continue;
}
if (ip > start + size) {
a = pivot + strlen(pivot) + 1;
continue;
}
*off = ip - start;
*len = size;
return endp + 1;
}
return NULL;
}
static noinline char *strsym(void *ip)
{
static char buf[64];
unsigned short off;
unsigned short len;
char *p;
p = findsym((unsigned long)ip, &off, &len);
if (p) {
strncpy(buf, p, sizeof(buf));
/* reserve 15 bytes for offset/len in symbol+0x1234/0x1234 */
p = buf + strnlen(buf, sizeof(buf) - 15);
strcpy(p, "+0x");
p = as_hex(p + 3, off, 0);
strcpy(p, "/0x");
as_hex(p + 3, len, 0);
} else {
as_hex(buf, (unsigned long)ip, 16);
}
return buf;
}
void decompressor_printk(const char *fmt, ...)
{
char buf[1024] = { 0 };
char *end = buf + sizeof(buf) - 1; /* make sure buf is 0 terminated */
unsigned long pad;
char *p = buf;
va_list args;
va_start(args, fmt);
for (; p < end && *fmt; fmt++) {
if (*fmt != '%') {
*p++ = *fmt;
continue;
}
pad = isdigit(*++fmt) ? simple_strtol(fmt, (char **)&fmt, 10) : 0;
switch (*fmt) {
case 's':
p = buf + strlcat(buf, va_arg(args, char *), sizeof(buf));
break;
case 'p':
if (*++fmt != 'S')
goto out;
p = buf + strlcat(buf, strsym(va_arg(args, void *)), sizeof(buf));
break;
case 'l':
if (*++fmt != 'x' || end - p <= max(sizeof(long) * 2, pad))
goto out;
p = as_hex(p, va_arg(args, unsigned long), pad);
break;
case 'x':
if (end - p <= max(sizeof(int) * 2, pad))
goto out;
p = as_hex(p, va_arg(args, unsigned int), pad);
break;
default:
goto out;
}
}
out:
va_end(args);
sclp_early_printk(buf);
}
static noinline void print_stacktrace(void)
{
struct stack_info boot_stack = { STACK_TYPE_TASK, BOOT_STACK_OFFSET,
BOOT_STACK_OFFSET + BOOT_STACK_SIZE };
unsigned long sp = S390_lowcore.gpregs_save_area[15];
bool first = true;
decompressor_printk("Call Trace:\n");
while (!(sp & 0x7) && on_stack(&boot_stack, sp, sizeof(struct stack_frame))) {
struct stack_frame *sf = (struct stack_frame *)sp;
decompressor_printk(first ? "(sp:%016lx [<%016lx>] %pS)\n" :
" sp:%016lx [<%016lx>] %pS\n",
sp, sf->gprs[8], (void *)sf->gprs[8]);
if (sf->back_chain <= sp)
break;
sp = sf->back_chain;
first = false;
}
}
void print_pgm_check_info(void)
{
unsigned long *gpregs = (unsigned long *)S390_lowcore.gpregs_save_area;
struct psw_bits *psw = &psw_bits(S390_lowcore.psw_save_area);
unsigned short ilc = S390_lowcore.pgm_ilc >> 1;
char buf[256];
int row, col;
char *p;
add_str(buf, "Linux version ");
strlcat(buf, kernel_version, sizeof(buf) - 1);
strlcat(buf, "\n", sizeof(buf));
sclp_early_printk(buf);
p = add_str(buf, "Kernel fault: interruption code ");
p = add_val_as_hex(buf + strlen(buf), S390_lowcore.pgm_code);
p = add_str(p, " ilc:");
*p++ = hex_asc_lo(ilc);
add_str(p, "\n");
sclp_early_printk(buf);
if (kaslr_enabled) {
p = add_str(buf, "Kernel random base: ");
p = add_val_as_hex(p, __kaslr_offset);
add_str(p, "\n");
sclp_early_printk(buf);
}
p = add_str(buf, "PSW : ");
p = add_val_as_hex(p, S390_lowcore.psw_save_area.mask);
p = add_str(p, " ");
p = add_val_as_hex(p, S390_lowcore.psw_save_area.addr);
add_str(p, "\n");
sclp_early_printk(buf);
p = add_str(buf, " R:");
*p++ = hex_asc_lo(psw->per);
p = add_str(p, " T:");
*p++ = hex_asc_lo(psw->dat);
p = add_str(p, " IO:");
*p++ = hex_asc_lo(psw->io);
p = add_str(p, " EX:");
*p++ = hex_asc_lo(psw->ext);
p = add_str(p, " Key:");
*p++ = hex_asc_lo(psw->key);
p = add_str(p, " M:");
*p++ = hex_asc_lo(psw->mcheck);
p = add_str(p, " W:");
*p++ = hex_asc_lo(psw->wait);
p = add_str(p, " P:");
*p++ = hex_asc_lo(psw->pstate);
p = add_str(p, " AS:");
*p++ = hex_asc_lo(psw->as);
p = add_str(p, " CC:");
*p++ = hex_asc_lo(psw->cc);
p = add_str(p, " PM:");
*p++ = hex_asc_lo(psw->pm);
p = add_str(p, " RI:");
*p++ = hex_asc_lo(psw->ri);
p = add_str(p, " EA:");
*p++ = hex_asc_lo(psw->eaba);
add_str(p, "\n");
sclp_early_printk(buf);
for (row = 0; row < 4; row++) {
p = add_str(buf, row == 0 ? "GPRS:" : " ");
for (col = 0; col < 4; col++) {
p = add_str(p, " ");
p = add_val_as_hex(p, S390_lowcore.gpregs_save_area[row * 4 + col]);
}
add_str(p, "\n");
sclp_early_printk(buf);
}
decompressor_printk("Linux version %s\n", kernel_version);
if (!is_prot_virt_guest() && early_command_line[0])
decompressor_printk("Kernel command line: %s\n", early_command_line);
decompressor_printk("Kernel fault: interruption code %04x ilc:%x\n",
S390_lowcore.pgm_code, S390_lowcore.pgm_ilc >> 1);
if (kaslr_enabled)
decompressor_printk("Kernel random base: %lx\n", __kaslr_offset);
decompressor_printk("PSW : %016lx %016lx (%pS)\n",
S390_lowcore.psw_save_area.mask,
S390_lowcore.psw_save_area.addr,
(void *)S390_lowcore.psw_save_area.addr);
decompressor_printk(
" R:%x T:%x IO:%x EX:%x Key:%x M:%x W:%x P:%x AS:%x CC:%x PM:%x RI:%x EA:%x\n",
psw->per, psw->dat, psw->io, psw->ext, psw->key, psw->mcheck,
psw->wait, psw->pstate, psw->as, psw->cc, psw->pm, psw->ri,
psw->eaba);
decompressor_printk("GPRS: %016lx %016lx %016lx %016lx\n",
gpregs[0], gpregs[1], gpregs[2], gpregs[3]);
decompressor_printk(" %016lx %016lx %016lx %016lx\n",
gpregs[4], gpregs[5], gpregs[6], gpregs[7]);
decompressor_printk(" %016lx %016lx %016lx %016lx\n",
gpregs[8], gpregs[9], gpregs[10], gpregs[11]);
decompressor_printk(" %016lx %016lx %016lx %016lx\n",
gpregs[12], gpregs[13], gpregs[14], gpregs[15]);
print_stacktrace();
decompressor_printk("Last Breaking-Event-Address:\n");
decompressor_printk(" [<%016lx>] %pS\n", (unsigned long)S390_lowcore.breaking_event_addr,
(void *)S390_lowcore.breaking_event_addr);
}

70
arch/s390/boot/startup.c
View File

@ -1,7 +1,9 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/string.h>
#include <linux/elf.h>
#include <asm/boot_data.h>
#include <asm/sections.h>
#include <asm/cpu_mf.h>
#include <asm/setup.h>
#include <asm/kexec.h>
#include <asm/sclp.h>
@ -13,6 +15,7 @@
extern char __boot_data_start[], __boot_data_end[];
extern char __boot_data_preserved_start[], __boot_data_preserved_end[];
unsigned long __bootdata_preserved(__kaslr_offset);
unsigned long __bootdata(ident_map_size);
/*
* Some code and data needs to stay below 2 GB, even when the kernel would be
@ -58,6 +61,14 @@ void error(char *x)
disabled_wait();
}
static void setup_lpp(void)
{
S390_lowcore.current_pid = 0;
S390_lowcore.lpp = LPP_MAGIC;
if (test_facility(40))
lpp(&S390_lowcore.lpp);
}
#ifdef CONFIG_KERNEL_UNCOMPRESSED
unsigned long mem_safe_offset(void)
{
@ -118,6 +129,46 @@ static void handle_relocs(unsigned long offset)
}
}
/*
* Merge information from several sources into a single ident_map_size value.
* "ident_map_size" represents the upper limit of physical memory we may ever
* reach. It might not be all online memory, but also include standby (offline)
* memory. "ident_map_size" could be lower then actual standby or even online
* memory present, due to limiting factors. We should never go above this limit.
* It is the size of our identity mapping.
*
* Consider the following factors:
* 1. max_physmem_end - end of physical memory online or standby.
* Always <= end of the last online memory block (get_mem_detect_end()).
* 2. CONFIG_MAX_PHYSMEM_BITS - the maximum size of physical memory the
* kernel is able to support.
* 3. "mem=" kernel command line option which limits physical memory usage.
* 4. OLDMEM_BASE which is a kdump memory limit when the kernel is executed as
* crash kernel.
* 5. "hsa" size which is a memory limit when the kernel is executed during
* zfcp/nvme dump.
*/
static void setup_ident_map_size(unsigned long max_physmem_end)
{
unsigned long hsa_size;
ident_map_size = max_physmem_end;
if (memory_limit)
ident_map_size = min(ident_map_size, memory_limit);
ident_map_size = min(ident_map_size, 1UL << MAX_PHYSMEM_BITS);
#ifdef CONFIG_CRASH_DUMP
if (OLDMEM_BASE) {
kaslr_enabled = 0;
ident_map_size = min(ident_map_size, OLDMEM_SIZE);
} else if (ipl_block_valid && is_ipl_block_dump()) {
kaslr_enabled = 0;
if (!sclp_early_get_hsa_size(&hsa_size) && hsa_size)
ident_map_size = min(ident_map_size, hsa_size);
}
#endif
}
/*
* This function clears the BSS section of the decompressed Linux kernel and NOT the decompressor's.
*/
@ -126,12 +177,27 @@ static void clear_bss_section(void)
memset((void *)vmlinux.default_lma + vmlinux.image_size, 0, vmlinux.bss_size);
}
/*
* Set vmalloc area size to an 8th of (potential) physical memory
* size, unless size has been set by kernel command line parameter.
*/
static void setup_vmalloc_size(void)
{
unsigned long size;
if (vmalloc_size_set)
return;
size = round_up(ident_map_size / 8, _SEGMENT_SIZE);
vmalloc_size = max(size, vmalloc_size);
}
void startup_kernel(void)
{
unsigned long random_lma;
unsigned long safe_addr;
void *img;
setup_lpp();
store_ipl_parmblock();
safe_addr = mem_safe_offset();
safe_addr = read_ipl_report(safe_addr);
@ -140,8 +206,8 @@ void startup_kernel(void)
sclp_early_read_info();
setup_boot_command_line();
parse_boot_command_line();
setup_memory_end();
detect_memory();
setup_ident_map_size(detect_memory());
setup_vmalloc_size();
random_lma = __kaslr_offset = 0;
if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && kaslr_enabled) {

1
arch/s390/configs/debug_defconfig
View File

@ -826,6 +826,7 @@ CONFIG_FTRACE_SYSCALLS=y
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_BPF_KPROBE_OVERRIDE=y
CONFIG_HIST_TRIGGERS=y
CONFIG_DEBUG_USER_ASCE=y
CONFIG_NOTIFIER_ERROR_INJECTION=m
CONFIG_NETDEV_NOTIFIER_ERROR_INJECT=m
CONFIG_FAULT_INJECTION=y

110
arch/s390/crypto/arch_random.c
View File

@ -2,7 +2,7 @@
/*
* s390 arch random implementation.
*
* Copyright IBM Corp. 2017, 2018
* Copyright IBM Corp. 2017, 2020
* Author(s): Harald Freudenberger
*
* The s390_arch_random_generate() function may be called from random.c
@ -33,6 +33,7 @@
#include <linux/slab.h>
#include <linux/static_key.h>
#include <linux/workqueue.h>
#include <linux/moduleparam.h>
#include <asm/cpacf.h>
DEFINE_STATIC_KEY_FALSE(s390_arch_random_available);
@ -99,6 +100,113 @@ static void arch_rng_refill_buffer(struct work_struct *unused)
queue_delayed_work(system_long_wq, &arch_rng_work, delay);
}
/*
* Here follows the implementation of s390_arch_get_random_long().
*
* The random longs to be pulled by arch_get_random_long() are
* prepared in an 4K buffer which is filled from the NIST 800-90
* compliant s390 drbg. By default the random long buffer is refilled
* 256 times before the drbg itself needs a reseed. The reseed of the
* drbg is done with 32 bytes fetched from the high quality (but slow)
* trng which is assumed to deliver 100% entropy. So the 32 * 8 = 256
* bits of entropy are spread over 256 * 4KB = 1MB serving 131072
* arch_get_random_long() invocations before reseeded.
*
* How often the 4K random long buffer is refilled with the drbg
* before the drbg is reseeded can be adjusted. There is a module
* parameter 's390_arch_rnd_long_drbg_reseed' accessible via
* /sys/module/arch_random/parameters/rndlong_drbg_reseed
* or as kernel command line parameter
* arch_random.rndlong_drbg_reseed=<value>
* This parameter tells how often the drbg fills the 4K buffer before
* it is re-seeded by fresh entropy from the trng.
* A value of 16 results in reseeding the drbg at every 16 * 4 KB = 64
* KB with 32 bytes of fresh entropy pulled from the trng. So a value
* of 16 would result in 256 bits entropy per 64 KB.
* A value of 256 results in 1MB of drbg output before a reseed of the
* drbg is done. So this would spread the 256 bits of entropy among 1MB.
* Setting this parameter to 0 forces the reseed to take place every
* time the 4K buffer is depleted, so the entropy rises to 256 bits
* entropy per 4K or 0.5 bit entropy per arch_get_random_long(). With
* setting this parameter to negative values all this effort is
* disabled, arch_get_random long() returns false and thus indicating
* that the arch_get_random_long() feature is disabled at all.
*/
static unsigned long rndlong_buf[512];
static DEFINE_SPINLOCK(rndlong_lock);
static int rndlong_buf_index;
static int rndlong_drbg_reseed = 256;
module_param_named(rndlong_drbg_reseed, rndlong_drbg_reseed, int, 0600);
MODULE_PARM_DESC(rndlong_drbg_reseed, "s390 arch_get_random_long() drbg reseed");
static inline void refill_rndlong_buf(void)
{
static u8 prng_ws[240];
static int drbg_counter;
if (--drbg_counter < 0) {
/* need to re-seed the drbg */
u8 seed[32];
/* fetch seed from trng */
cpacf_trng(NULL, 0, seed, sizeof(seed));
/* seed drbg */
memset(prng_ws, 0, sizeof(prng_ws));
cpacf_prno(CPACF_PRNO_SHA512_DRNG_SEED,
&prng_ws, NULL, 0, seed, sizeof(seed));
/* re-init counter for drbg */
drbg_counter = rndlong_drbg_reseed;
}
/* fill the arch_get_random_long buffer from drbg */
cpacf_prno(CPACF_PRNO_SHA512_DRNG_GEN, &prng_ws,
(u8 *) rndlong_buf, sizeof(rndlong_buf),
NULL, 0);
}
bool s390_arch_get_random_long(unsigned long *v)
{
bool rc = false;
unsigned long flags;
/* arch_get_random_long() disabled ? */
if (rndlong_drbg_reseed < 0)
return false;
/* try to lock the random long lock */
if (!spin_trylock_irqsave(&rndlong_lock, flags))
return false;
if (--rndlong_buf_index >= 0) {
/* deliver next long value from the buffer */
*v = rndlong_buf[rndlong_buf_index];
rc = true;
goto out;
}
/* buffer is depleted and needs refill */
if (in_interrupt()) {
/* delay refill in interrupt context to next caller */
rndlong_buf_index = 0;
goto out;
}
/* refill random long buffer */
refill_rndlong_buf();
rndlong_buf_index = ARRAY_SIZE(rndlong_buf);
/* and provide one random long */
*v = rndlong_buf[--rndlong_buf_index];
rc = true;
out:
spin_unlock_irqrestore(&rndlong_lock, flags);
return rc;
}
EXPORT_SYMBOL(s390_arch_get_random_long);
static int __init s390_arch_random_init(void)
{
/* all the needed PRNO subfunctions available ? */

53
arch/s390/crypto/prng.c
View File

@ -674,20 +674,6 @@ static const struct file_operations prng_tdes_fops = {
.llseek = noop_llseek,
};
static struct miscdevice prng_sha512_dev = {
.name = "prandom",
.minor = MISC_DYNAMIC_MINOR,
.mode = 0644,
.fops = &prng_sha512_fops,
};
static struct miscdevice prng_tdes_dev = {
.name = "prandom",
.minor = MISC_DYNAMIC_MINOR,
.mode = 0644,
.fops = &prng_tdes_fops,
};
/* chunksize attribute (ro) */
static ssize_t prng_chunksize_show(struct device *dev,
struct device_attribute *attr,
@ -801,18 +787,30 @@ static struct attribute *prng_sha512_dev_attrs[] = {
&dev_attr_strength.attr,
NULL
};
ATTRIBUTE_GROUPS(prng_sha512_dev);
static struct attribute *prng_tdes_dev_attrs[] = {
&dev_attr_chunksize.attr,
&dev_attr_byte_counter.attr,
&dev_attr_mode.attr,
NULL
};
ATTRIBUTE_GROUPS(prng_tdes_dev);
static struct attribute_group prng_sha512_dev_attr_group = {
.attrs = prng_sha512_dev_attrs
static struct miscdevice prng_sha512_dev = {
.name = "prandom",
.minor = MISC_DYNAMIC_MINOR,
.mode = 0644,
.fops = &prng_sha512_fops,
.groups = prng_sha512_dev_groups,
};
static struct attribute_group prng_tdes_dev_attr_group = {
.attrs = prng_tdes_dev_attrs
static struct miscdevice prng_tdes_dev = {
.name = "prandom",
.minor = MISC_DYNAMIC_MINOR,
.mode = 0644,
.fops = &prng_tdes_fops,
.groups = prng_tdes_dev_groups,
};
@ -867,13 +865,6 @@ static int __init prng_init(void)
prng_sha512_deinstantiate();
goto out;
}
ret = sysfs_create_group(&prng_sha512_dev.this_device->kobj,
&prng_sha512_dev_attr_group);
if (ret) {
misc_deregister(&prng_sha512_dev);
prng_sha512_deinstantiate();
goto out;
}
} else {
@ -898,14 +889,6 @@ static int __init prng_init(void)
prng_tdes_deinstantiate();
goto out;
}
ret = sysfs_create_group(&prng_tdes_dev.this_device->kobj,
&prng_tdes_dev_attr_group);
if (ret) {
misc_deregister(&prng_tdes_dev);
prng_tdes_deinstantiate();
goto out;
}
}
out:
@ -916,13 +899,9 @@ out:
static void __exit prng_exit(void)
{
if (prng_mode == PRNG_MODE_SHA512) {
sysfs_remove_group(&prng_sha512_dev.this_device->kobj,
&prng_sha512_dev_attr_group);
misc_deregister(&prng_sha512_dev);
prng_sha512_deinstantiate();
} else {
sysfs_remove_group(&prng_tdes_dev.this_device->kobj,
&prng_tdes_dev_attr_group);
misc_deregister(&prng_tdes_dev);
prng_tdes_deinstantiate();
}

5
arch/s390/include/asm/archrandom.h
View File

@ -2,7 +2,7 @@
/*
* Kernel interface for the s390 arch_random_* functions
*
* Copyright IBM Corp. 2017
* Copyright IBM Corp. 2017, 2020
*
* Author: Harald Freudenberger <freude@de.ibm.com>
*
@ -19,10 +19,13 @@
DECLARE_STATIC_KEY_FALSE(s390_arch_random_available);
extern atomic64_t s390_arch_random_counter;
bool s390_arch_get_random_long(unsigned long *v);
bool s390_arch_random_generate(u8 *buf, unsigned int nbytes);
static inline bool __must_check arch_get_random_long(unsigned long *v)
{
if (static_branch_likely(&s390_arch_random_available))
return s390_arch_get_random_long(v);
return false;
}

12
arch/s390/include/asm/ccwdev.h
View File

@ -115,7 +115,7 @@ enum uc_todo {
};
/**
* struct ccw driver - device driver for channel attached devices
* struct ccw_driver - device driver for channel attached devices
* @ids: ids supported by this driver
* @probe: function called on probe
* @remove: function called on remove
@ -124,11 +124,6 @@ enum uc_todo {
* @notify: notify driver of device state changes
* @path_event: notify driver of channel path events
* @shutdown: called at device shutdown
* @prepare: prepare for pm state transition
* @complete: undo work done in @prepare
* @freeze: callback for freezing during hibernation snapshotting
* @thaw: undo work done in @freeze
* @restore: callback for restoring after hibernation
* @uc_handler: callback for unit check handler
* @driver: embedded device driver structure
* @int_class: interruption class to use for accounting interrupts
@ -142,11 +137,6 @@ struct ccw_driver {
int (*notify) (struct ccw_device *, int);
void (*path_event) (struct ccw_device *, int *);
void (*shutdown) (struct ccw_device *);
int (*prepare) (struct ccw_device *);
void (*complete) (struct ccw_device *);
int (*freeze)(struct ccw_device *);
int (*thaw) (struct ccw_device *);
int (*restore)(struct ccw_device *);
enum uc_todo (*uc_handler) (struct ccw_device *, struct irb *);
struct device_driver driver;
enum interruption_class int_class;

2
arch/s390/include/asm/cio.h
View File

@ -329,7 +329,7 @@ struct ccw_dev_id {
};
/**
* ccw_device_id_is_equal() - compare two ccw_dev_ids
* ccw_dev_id_is_equal() - compare two ccw_dev_ids
* @dev_id1: a ccw_dev_id
* @dev_id2: another ccw_dev_id
* Returns:

1
arch/s390/include/asm/delay.h
View File

@ -13,6 +13,7 @@
#ifndef _S390_DELAY_H
#define _S390_DELAY_H
void udelay_enable(void);
void __ndelay(unsigned long long nsecs);
void __udelay(unsigned long long usecs);
void udelay_simple(unsigned long long usecs);

33
arch/s390/include/asm/ftrace.h
View File

@ -2,16 +2,9 @@
#ifndef _ASM_S390_FTRACE_H
#define _ASM_S390_FTRACE_H
#define ARCH_SUPPORTS_FTRACE_OPS 1
#if defined(CC_USING_HOTPATCH) || defined(CC_USING_NOP_MCOUNT)
#define MCOUNT_INSN_SIZE 6
#else
#define MCOUNT_INSN_SIZE 24
#define MCOUNT_RETURN_FIXUP 18
#endif
#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
#define ARCH_SUPPORTS_FTRACE_OPS 1
#define MCOUNT_INSN_SIZE 6
#ifndef __ASSEMBLY__
@ -22,7 +15,6 @@
#define ftrace_return_address(n) __builtin_return_address(n)
#endif
void _mcount(void);
void ftrace_caller(void);
extern char ftrace_graph_caller_end;
@ -30,12 +22,20 @@ extern unsigned long ftrace_plt;
struct dyn_arch_ftrace { };
#define MCOUNT_ADDR ((unsigned long)_mcount)
#define MCOUNT_ADDR 0
#define FTRACE_ADDR ((unsigned long)ftrace_caller)
#define KPROBE_ON_FTRACE_NOP 0
#define KPROBE_ON_FTRACE_CALL 1
struct module;
struct dyn_ftrace;
/*
* Either -mhotpatch or -mnop-mcount is used - no explicit init is required
*/
static inline int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec) { return 0; }
#define ftrace_init_nop ftrace_init_nop
static inline unsigned long ftrace_call_adjust(unsigned long addr)
{
return addr;
@ -49,28 +49,17 @@ struct ftrace_insn {
static inline void ftrace_generate_nop_insn(struct ftrace_insn *insn)
{
#ifdef CONFIG_FUNCTION_TRACER
#if defined(CC_USING_HOTPATCH) || defined(CC_USING_NOP_MCOUNT)
/* brcl 0,0 */
insn->opc = 0xc004;
insn->disp = 0;
#else
/* jg .+24 */
insn->opc = 0xc0f4;
insn->disp = MCOUNT_INSN_SIZE / 2;
#endif
#endif
}
static inline int is_ftrace_nop(struct ftrace_insn *insn)
{
#ifdef CONFIG_FUNCTION_TRACER
#if defined(CC_USING_HOTPATCH) || defined(CC_USING_NOP_MCOUNT)
if (insn->disp == 0)
return 1;
#else
if (insn->disp == MCOUNT_INSN_SIZE / 2)
return 1;
#endif
#endif
return 0;
}

6
arch/s390/include/asm/futex.h
View File

@ -26,9 +26,7 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
u32 __user *uaddr)
{
int oldval = 0, newval, ret;
mm_segment_t old_fs;
old_fs = enable_sacf_uaccess();
switch (op) {
case FUTEX_OP_SET:
__futex_atomic_op("lr %2,%5\n",
@ -53,7 +51,6 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
default:
ret = -ENOSYS;
}
disable_sacf_uaccess(old_fs);
if (!ret)
*oval = oldval;
@ -64,10 +61,8 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
static inline int futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
u32 oldval, u32 newval)
{
mm_segment_t old_fs;
int ret;
old_fs = enable_sacf_uaccess();
asm volatile(
" sacf 256\n"
"0: cs %1,%4,0(%5)\n"
@ -77,7 +72,6 @@ static inline int futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
: "=d" (ret), "+d" (oldval), "=m" (*uaddr)
: "0" (-EFAULT), "d" (newval), "a" (uaddr), "m" (*uaddr)
: "cc", "memory");
disable_sacf_uaccess(old_fs);
*uval = oldval;
return ret;
}

37
arch/s390/include/asm/kasan.h
View File

@ -2,28 +2,51 @@
#ifndef __ASM_KASAN_H
#define __ASM_KASAN_H
#include <asm/pgtable.h>
#ifdef CONFIG_KASAN
#define KASAN_SHADOW_SCALE_SHIFT 3
#ifdef CONFIG_KASAN_S390_4_LEVEL_PAGING
#define KASAN_SHADOW_SIZE \
(_AC(1, UL) << (_REGION1_SHIFT - KASAN_SHADOW_SCALE_SHIFT))
#else
#define KASAN_SHADOW_SIZE \
(_AC(1, UL) << (_REGION2_SHIFT - KASAN_SHADOW_SCALE_SHIFT))
#endif
#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
#define KASAN_SHADOW_START KASAN_SHADOW_OFFSET
#define KASAN_SHADOW_END (KASAN_SHADOW_START + KASAN_SHADOW_SIZE)
extern void kasan_early_init(void);
extern void kasan_copy_shadow(pgd_t *dst);
extern void kasan_copy_shadow_mapping(void);
extern void kasan_free_early_identity(void);
extern unsigned long kasan_vmax;
/*
* Estimate kasan memory requirements, which it will reserve
* at the very end of available physical memory. To estimate
* that, we take into account that kasan would require
* 1/8 of available physical memory (for shadow memory) +
* creating page tables for the whole memory + shadow memory
* region (1 + 1/8). To keep page tables estimates simple take
* the double of combined ptes size.
*
* physmem parameter has to be already adjusted if not entire physical memory
* would be used (e.g. due to effect of "mem=" option).
*/
static inline unsigned long kasan_estimate_memory_needs(unsigned long physmem)
{
unsigned long kasan_needs;
unsigned long pages;
/* for shadow memory */
kasan_needs = round_up(physmem / 8, PAGE_SIZE);
/* for paging structures */
pages = DIV_ROUND_UP(physmem + kasan_needs, PAGE_SIZE);
kasan_needs += DIV_ROUND_UP(pages, _PAGE_ENTRIES) * _PAGE_TABLE_SIZE * 2;
return kasan_needs;
}
#else
static inline void kasan_early_init(void) { }
static inline void kasan_copy_shadow(pgd_t *dst) { }
static inline void kasan_copy_shadow_mapping(void) { }
static inline void kasan_free_early_identity(void) { }
static inline unsigned long kasan_estimate_memory_needs(unsigned long physmem) { return 0; }
#endif
#endif

4
arch/s390/include/asm/lowcore.h
View File

@ -116,7 +116,7 @@ struct lowcore {
/* Address space pointer. */
__u64 kernel_asce; /* 0x0380 */
__u64 user_asce; /* 0x0388 */
__u64 vdso_asce; /* 0x0390 */
__u8 pad_0x0390[0x0398-0x0390]; /* 0x0390 */
/*
* The lpp and current_pid fields form a
@ -134,7 +134,7 @@ struct lowcore {
__u32 spinlock_index; /* 0x03b0 */
__u32 fpu_flags; /* 0x03b4 */
__u64 percpu_offset; /* 0x03b8 */
__u64 vdso_per_cpu_data; /* 0x03c0 */
__u8 pad_0x03c0[0x03c8-0x03c0]; /* 0x03c0 */
__u64 machine_flags; /* 0x03c8 */
__u64 gmap; /* 0x03d0 */
__u8 pad_0x03d8[0x0400-0x03d8]; /* 0x03d8 */

37
arch/s390/include/asm/mmu_context.h
View File

@ -71,39 +71,18 @@ static inline int init_new_context(struct task_struct *tsk,
#define destroy_context(mm) do { } while (0)
static inline void set_user_asce(struct mm_struct *mm)
{
S390_lowcore.user_asce = mm->context.asce;
__ctl_load(S390_lowcore.user_asce, 1, 1);
clear_cpu_flag(CIF_ASCE_PRIMARY);
}
static inline void clear_user_asce(void)
{
S390_lowcore.user_asce = S390_lowcore.kernel_asce;
__ctl_load(S390_lowcore.kernel_asce, 1, 1);
set_cpu_flag(CIF_ASCE_PRIMARY);
}
mm_segment_t enable_sacf_uaccess(void);
void disable_sacf_uaccess(mm_segment_t old_fs);
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
{
int cpu = smp_processor_id();
S390_lowcore.user_asce = next->context.asce;
if (next == &init_mm)
S390_lowcore.user_asce = s390_invalid_asce;
else
S390_lowcore.user_asce = next->context.asce;
cpumask_set_cpu(cpu, &next->context.cpu_attach_mask);
/* Clear previous user-ASCE from CR1 and CR7 */
if (!test_cpu_flag(CIF_ASCE_PRIMARY)) {
__ctl_load(S390_lowcore.kernel_asce, 1, 1);
set_cpu_flag(CIF_ASCE_PRIMARY);
}
if (test_cpu_flag(CIF_ASCE_SECONDARY)) {
__ctl_load(S390_lowcore.vdso_asce, 7, 7);
clear_cpu_flag(CIF_ASCE_SECONDARY);
}
/* Clear previous user-ASCE from CR7 */
__ctl_load(s390_invalid_asce, 7, 7);
if (prev != next)
cpumask_clear_cpu(cpu, &prev->context.cpu_attach_mask);
}
@ -122,7 +101,7 @@ static inline void finish_arch_post_lock_switch(void)
__tlb_flush_mm_lazy(mm);
preempt_enable();
}
set_fs(current->thread.mm_segment);
__ctl_load(S390_lowcore.user_asce, 7, 7);
}
#define enter_lazy_tlb(mm,tsk) do { } while (0)
@ -133,7 +112,7 @@ static inline void activate_mm(struct mm_struct *prev,
{
switch_mm(prev, next, current);
cpumask_set_cpu(smp_processor_id(), mm_cpumask(next));
set_user_asce(next);
__ctl_load(S390_lowcore.user_asce, 7, 7);
}
#endif /* __S390_MMU_CONTEXT_H */

13
arch/s390/include/asm/pgtable.h
View File

@ -23,6 +23,7 @@
extern pgd_t swapper_pg_dir[];
extern void paging_init(void);
extern unsigned long s390_invalid_asce;
enum {
PG_DIRECT_MAP_4K = 0,
@ -79,15 +80,15 @@ extern unsigned long zero_page_mask;
/*
* The vmalloc and module area will always be on the topmost area of the
* kernel mapping. We reserve 128GB (64bit) for vmalloc and modules.
* On 64 bit kernels we have a 2GB area at the top of the vmalloc area where
* modules will reside. That makes sure that inter module branches always
* happen without trampolines and in addition the placement within a 2GB frame
* is branch prediction unit friendly.
* kernel mapping. 512GB are reserved for vmalloc by default.
* At the top of the vmalloc area a 2GB area is reserved where modules
* will reside. That makes sure that inter module branches always
* happen without trampolines and in addition the placement within a
* 2GB frame is branch prediction unit friendly.
*/
extern unsigned long VMALLOC_START;
extern unsigned long VMALLOC_END;
#define VMALLOC_DEFAULT_SIZE ((128UL << 30) - MODULES_LEN)
#define VMALLOC_DEFAULT_SIZE ((512UL << 30) - MODULES_LEN)
extern struct page *vmemmap;
extern unsigned long vmemmap_size;

13
arch/s390/include/asm/processor.h
View File

@ -14,8 +14,6 @@
#include <linux/bits.h>
#define CIF_ASCE_PRIMARY 0 /* primary asce needs fixup / uaccess */
#define CIF_ASCE_SECONDARY 1 /* secondary asce needs fixup / uaccess */
#define CIF_NOHZ_DELAY 2 /* delay HZ disable for a tick */
#define CIF_FPU 3 /* restore FPU registers */
#define CIF_IGNORE_IRQ 4 /* ignore interrupt (for udelay) */
@ -23,8 +21,6 @@
#define CIF_MCCK_GUEST 6 /* machine check happening in guest */
#define CIF_DEDICATED_CPU 7 /* this CPU is dedicated */
#define _CIF_ASCE_PRIMARY BIT(CIF_ASCE_PRIMARY)
#define _CIF_ASCE_SECONDARY BIT(CIF_ASCE_SECONDARY)
#define _CIF_NOHZ_DELAY BIT(CIF_NOHZ_DELAY)
#define _CIF_FPU BIT(CIF_FPU)
#define _CIF_IGNORE_IRQ BIT(CIF_IGNORE_IRQ)
@ -102,8 +98,6 @@ extern void __bpon(void);
#define HAVE_ARCH_PICK_MMAP_LAYOUT
typedef unsigned int mm_segment_t;
/*
* Thread structure
*/
@ -116,7 +110,6 @@ struct thread_struct {
unsigned long hardirq_timer; /* task cputime in hardirq context */
unsigned long softirq_timer; /* task cputime in softirq context */
unsigned long sys_call_table; /* system call table address */
mm_segment_t mm_segment;
unsigned long gmap_addr; /* address of last gmap fault. */
unsigned int gmap_write_flag; /* gmap fault write indication */
unsigned int gmap_int_code; /* int code of last gmap fault */
@ -318,14 +311,10 @@ static __always_inline void __noreturn disabled_wait(void)
}
/*
* Basic Machine Check/Program Check Handler.
* Basic Program Check Handler.
*/
extern void s390_base_pgm_handler(void);
extern void s390_base_ext_handler(void);
extern void (*s390_base_pgm_handler_fn)(void);
extern void (*s390_base_ext_handler_fn)(void);
#define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL

1
arch/s390/include/asm/ptrace.h
View File

@ -87,6 +87,7 @@ struct pt_regs
unsigned int int_parm;
unsigned long int_parm_long;
unsigned long flags;
unsigned long cr1;
};
/*

7
arch/s390/include/asm/sclp.h
View File

@ -12,7 +12,12 @@
#include <asm/cpu.h>
#define SCLP_CHP_INFO_MASK_SIZE 32
#define SCLP_MAX_CORES 256
#define EARLY_SCCB_SIZE PAGE_SIZE
#define SCLP_MAX_CORES 512
/* 144 + 16 * SCLP_MAX_CORES + 2 * (SCLP_MAX_CORES - 1) */
#define EXT_SCCB_READ_SCP (3 * PAGE_SIZE)
/* 24 + 16 * SCLP_MAX_CORES */
#define EXT_SCCB_READ_CPU (3 * PAGE_SIZE)
struct sclp_chp_info {
u8 recognized[SCLP_CHP_INFO_MASK_SIZE];

6
arch/s390/include/asm/setup.h
View File

@ -16,8 +16,6 @@
#define EARLY_SCCB_OFFSET 0x11000
#define HEAD_END 0x12000
#define EARLY_SCCB_SIZE PAGE_SIZE
/*
* Machine features detected in early.c
*/
@ -88,10 +86,8 @@ extern unsigned int zlib_dfltcc_support;
#define ZLIB_DFLTCC_FULL_DEBUG 4
extern int noexec_disabled;
extern int memory_end_set;
extern unsigned long memory_end;
extern unsigned long ident_map_size;
extern unsigned long vmalloc_size;
extern unsigned long max_physmem_end;
/* The Write Back bit position in the physaddr is given by the SLPC PCI */
extern unsigned long mio_wb_bit_mask;

2
arch/s390/include/asm/thread_info.h
View File

@ -18,7 +18,7 @@
#else
#define THREAD_SIZE_ORDER 2
#endif
#define BOOT_STACK_ORDER 2
#define BOOT_STACK_SIZE (PAGE_SIZE << 2)
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
#ifndef __ASSEMBLY__

7
arch/s390/include/asm/timex.h
View File

@ -49,6 +49,13 @@ static inline void set_clock_comparator(__u64 time)
asm volatile("sckc %0" : : "Q" (time));
}
static inline void set_tod_programmable_field(u16 val)
{
register unsigned long reg0 asm("0") = val;
asm volatile("sckpf" : : "d" (reg0));
}
void clock_comparator_work(void);
void __init time_early_init(void);

22
arch/s390/include/asm/uaccess.h
View File

@ -18,23 +18,7 @@
#include <asm/extable.h>
#include <asm/facility.h>
/*
* The fs value determines whether argument validity checking should be
* performed or not. If get_fs() == USER_DS, checking is performed, with
* get_fs() == KERNEL_DS, checking is bypassed.
*
* For historical reasons, these macros are grossly misnamed.
*/
#define KERNEL_DS (0)
#define KERNEL_DS_SACF (1)
#define USER_DS (2)
#define USER_DS_SACF (3)
#define get_fs() (current->thread.mm_segment)
#define uaccess_kernel() ((get_fs() & 2) == KERNEL_DS)
void set_fs(mm_segment_t fs);
void debug_user_asce(void);
static inline int __range_ok(unsigned long addr, unsigned long size)
{
@ -88,7 +72,7 @@ int __get_user_bad(void) __attribute__((noreturn));
static __always_inline int __put_user_fn(void *x, void __user *ptr, unsigned long size)
{
unsigned long spec = 0x010000UL;
unsigned long spec = 0x810000UL;
int rc;
switch (size) {
@ -121,7 +105,7 @@ static __always_inline int __put_user_fn(void *x, void __user *ptr, unsigned lon
static __always_inline int __get_user_fn(void *x, const void __user *ptr, unsigned long size)
{
unsigned long spec = 0x01UL;
unsigned long spec = 0x81UL;
int rc;
switch (size) {

25
arch/s390/include/asm/vdso.h
View File

@ -12,32 +12,9 @@
#ifndef __ASSEMBLY__
/*
* Note about the vdso_data and vdso_per_cpu_data structures:
*
* NEVER USE THEM IN USERSPACE CODE DIRECTLY. The layout of the
* structure is supposed to be known only to the function in the vdso
* itself and may change without notice.
*/
struct vdso_per_cpu_data {
/*
* Note: node_id and cpu_nr must be at adjacent memory locations.
* VDSO userspace must read both values with a single instruction.
*/
union {
__u64 getcpu_val;
struct {
__u32 node_id;
__u32 cpu_nr;
};
};
};
extern struct vdso_data *vdso_data;
int vdso_alloc_per_cpu(struct lowcore *lowcore);
void vdso_free_per_cpu(struct lowcore *lowcore);
void vdso_getcpu_init(void);
#endif /* __ASSEMBLY__ */
#endif /* __S390_VDSO_H__ */

7
arch/s390/kernel/asm-offsets.c
View File

@ -13,7 +13,6 @@
#include <linux/purgatory.h>
#include <linux/pgtable.h>
#include <asm/idle.h>
#include <asm/vdso.h>
#include <asm/gmap.h>
#include <asm/nmi.h>
#include <asm/stacktrace.h>
@ -48,6 +47,7 @@ int main(void)
OFFSET(__PT_INT_PARM, pt_regs, int_parm);
OFFSET(__PT_INT_PARM_LONG, pt_regs, int_parm_long);
OFFSET(__PT_FLAGS, pt_regs, flags);
OFFSET(__PT_CR1, pt_regs, cr1);
DEFINE(__PT_SIZE, sizeof(struct pt_regs));
BLANK();
/* stack_frame offsets */
@ -59,8 +59,6 @@ int main(void)
OFFSET(__SF_SIE_REASON, stack_frame, empty1[3]);
OFFSET(__SF_SIE_FLAGS, stack_frame, empty1[4]);
BLANK();
OFFSET(__VDSO_GETCPU_VAL, vdso_per_cpu_data, getcpu_val);
BLANK();
/* idle data offsets */
OFFSET(__CLOCK_IDLE_ENTER, s390_idle_data, clock_idle_enter);
OFFSET(__CLOCK_IDLE_EXIT, s390_idle_data, clock_idle_exit);
@ -138,12 +136,11 @@ int main(void)
OFFSET(__LC_RESTART_FN, lowcore, restart_fn);
OFFSET(__LC_RESTART_DATA, lowcore, restart_data);
OFFSET(__LC_RESTART_SOURCE, lowcore, restart_source);
OFFSET(__LC_KERNEL_ASCE, lowcore, kernel_asce);
OFFSET(__LC_USER_ASCE, lowcore, user_asce);
OFFSET(__LC_VDSO_ASCE, lowcore, vdso_asce);
OFFSET(__LC_LPP, lowcore, lpp);
OFFSET(__LC_CURRENT_PID, lowcore, current_pid);
OFFSET(__LC_PERCPU_OFFSET, lowcore, percpu_offset);
OFFSET(__LC_VDSO_PER_CPU, lowcore, vdso_per_cpu_data);
OFFSET(__LC_MACHINE_FLAGS, lowcore, machine_flags);
OFFSET(__LC_PREEMPT_COUNT, lowcore, preempt_count);
OFFSET(__LC_GMAP, lowcore, gmap);

22
arch/s390/kernel/base.S
View File

@ -11,32 +11,10 @@
#include <asm/asm-offsets.h>
#include <asm/nospec-insn.h>
#include <asm/ptrace.h>
#include <asm/sigp.h>
GEN_BR_THUNK %r9
GEN_BR_THUNK %r14
ENTRY(s390_base_ext_handler)
stmg %r0,%r15,__LC_SAVE_AREA_ASYNC
basr %r13,0
0: aghi %r15,-STACK_FRAME_OVERHEAD
larl %r1,s390_base_ext_handler_fn
lg %r9,0(%r1)
ltgr %r9,%r9
jz 1f
BASR_EX %r14,%r9
1: lmg %r0,%r15,__LC_SAVE_AREA_ASYNC
ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit
lpswe __LC_EXT_OLD_PSW
ENDPROC(s390_base_ext_handler)
.section .bss
.align 8
.globl s390_base_ext_handler_fn
s390_base_ext_handler_fn:
.quad 0
.previous
ENTRY(s390_base_pgm_handler)
stmg %r0,%r15,__LC_SAVE_AREA_SYNC
basr %r13,0

4
arch/s390/kernel/early.c
View File

@ -169,12 +169,10 @@ static noinline __init void setup_lowcore_early(void)
{
psw_t psw;
psw.addr = (unsigned long)s390_base_pgm_handler;
psw.mask = PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA;
if (IS_ENABLED(CONFIG_KASAN))
psw.mask |= PSW_MASK_DAT;
psw.addr = (unsigned long) s390_base_ext_handler;
S390_lowcore.external_new_psw = psw;
psw.addr = (unsigned long) s390_base_pgm_handler;
S390_lowcore.program_new_psw = psw;
s390_base_pgm_handler_fn = early_pgm_check_handler;
S390_lowcore.preempt_count = INIT_PREEMPT_COUNT;

141
arch/s390/kernel/entry.S
View File

@ -55,7 +55,7 @@ _TIF_WORK = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_UPROBE | _TIF_GUARDED_STORAGE | _TIF_PATCH_PENDING)
_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
_TIF_SYSCALL_TRACEPOINT)
_CIF_WORK = (_CIF_ASCE_PRIMARY | _CIF_ASCE_SECONDARY | _CIF_FPU)
_CIF_WORK = (_CIF_FPU)
_PIF_WORK = (_PIF_PER_TRAP | _PIF_SYSCALL_RESTART)
_LPP_OFFSET = __LC_LPP
@ -90,6 +90,12 @@ _LPP_OFFSET = __LC_LPP
#endif
.endm
.macro DEBUG_USER_ASCE
#ifdef CONFIG_DEBUG_USER_ASCE
brasl %r14,debug_user_asce
#endif
.endm
.macro CHECK_VMAP_STACK savearea,oklabel
#ifdef CONFIG_VMAP_STACK
lgr %r14,%r15
@ -110,9 +116,9 @@ _LPP_OFFSET = __LC_LPP
#endif
.endm
.macro SWITCH_ASYNC savearea,timer
.macro SWITCH_ASYNC savearea,timer,clock
tmhh %r8,0x0001 # interrupting from user ?
jnz 2f
jnz 4f
#if IS_ENABLED(CONFIG_KVM)
lgr %r14,%r9
larl %r13,.Lsie_gmap
@ -125,10 +131,26 @@ _LPP_OFFSET = __LC_LPP
#endif
0: larl %r13,.Lpsw_idle_exit
cgr %r13,%r9
jne 1f
jne 3f
mvc __CLOCK_IDLE_EXIT(8,%r2), __LC_INT_CLOCK
mvc __TIMER_IDLE_EXIT(8,%r2), __LC_ASYNC_ENTER_TIMER
larl %r1,smp_cpu_mtid
llgf %r1,0(%r1)
ltgr %r1,%r1
jz 2f # no SMT, skip mt_cycles calculation
.insn rsy,0xeb0000000017,%r1,5,__SF_EMPTY+80(%r15)
larl %r3,mt_cycles
ag %r3,__LC_PERCPU_OFFSET
la %r4,__SF_EMPTY+16(%r15)
1: lg %r0,0(%r3)
slg %r0,0(%r4)
alg %r0,64(%r4)
stg %r0,0(%r3)
la %r3,8(%r3)
la %r4,8(%r4)
brct %r1,1b
2: mvc __CLOCK_IDLE_EXIT(8,%r2), \clock
mvc __TIMER_IDLE_EXIT(8,%r2), \timer
# account system time going idle
ni __LC_CPU_FLAGS+7,255-_CIF_ENABLED_WAIT
@ -146,17 +168,17 @@ _LPP_OFFSET = __LC_LPP
mvc __LC_LAST_UPDATE_TIMER(8),__TIMER_IDLE_EXIT(%r2)
nihh %r8,0xfcfd # clear wait state and irq bits
1: lg %r14,__LC_ASYNC_STACK # are we already on the target stack?
3: lg %r14,__LC_ASYNC_STACK # are we already on the target stack?
slgr %r14,%r15
srag %r14,%r14,STACK_SHIFT
jnz 3f
jnz 5f
CHECK_STACK \savearea
aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
j 4f
2: UPDATE_VTIME %r14,%r15,\timer
j 6f
4: UPDATE_VTIME %r14,%r15,\timer
BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
3: lg %r15,__LC_ASYNC_STACK # load async stack
4: la %r11,STACK_FRAME_OVERHEAD(%r15)
5: lg %r15,__LC_ASYNC_STACK # load async stack
6: la %r11,STACK_FRAME_OVERHEAD(%r15)
.endm
.macro UPDATE_VTIME w1,w2,enter_timer
@ -327,7 +349,7 @@ ENTRY(sie64a)
BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
.Lsie_skip:
ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
lctlg %c1,%c1,__LC_KERNEL_ASCE # load primary asce
.Lsie_done:
# some program checks are suppressing. C code (e.g. do_protection_exception)
# will rewind the PSW by the ILC, which is often 4 bytes in case of SIE. There
@ -380,6 +402,7 @@ ENTRY(system_call)
lg %r12,__LC_CURRENT
lghi %r14,_PIF_SYSCALL
.Lsysc_per:
lctlg %c1,%c1,__LC_KERNEL_ASCE
lghi %r13,__TASK_thread
lg %r15,__LC_KERNEL_STACK
la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs
@ -427,11 +450,9 @@ ENTRY(system_call)
jnz .Lsysc_work
TSTMSK __TI_flags(%r12),_TIF_WORK
jnz .Lsysc_work # check for work
TSTMSK __LC_CPU_FLAGS,(_CIF_WORK-_CIF_FPU)
jnz .Lsysc_work
DEBUG_USER_ASCE
lctlg %c1,%c1,__LC_USER_ASCE
BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
.Lsysc_restore:
DISABLE_INTS
TSTMSK __LC_CPU_FLAGS, _CIF_FPU
jz .Lsysc_skip_fpu
brasl %r14,load_fpu_regs
@ -469,8 +490,6 @@ ENTRY(system_call)
jo .Lsysc_sigpending
TSTMSK __TI_flags(%r12),_TIF_NOTIFY_RESUME
jo .Lsysc_notify_resume
TSTMSK __LC_CPU_FLAGS,(_CIF_ASCE_PRIMARY|_CIF_ASCE_SECONDARY)
jnz .Lsysc_asce
j .Lsysc_return
#
@ -480,26 +499,6 @@ ENTRY(system_call)
larl %r14,.Lsysc_return
jg schedule
#
# _CIF_ASCE_PRIMARY and/or _CIF_ASCE_SECONDARY set, load user space asce
#
.Lsysc_asce:
ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_SECONDARY
lctlg %c7,%c7,__LC_VDSO_ASCE # load secondary asce
TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_PRIMARY
jz .Lsysc_return
#ifndef CONFIG_HAVE_MARCH_Z10_FEATURES
tm __LC_STFLE_FAC_LIST+3,0x10 # has MVCOS ?
jnz .Lsysc_set_fs_fixup
ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_PRIMARY
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
j .Lsysc_return
.Lsysc_set_fs_fixup:
#endif
larl %r14,.Lsysc_return
jg set_fs_fixup
#
# _TIF_SIGPENDING is set, call do_signal
#
@ -636,8 +635,11 @@ ENTRY(pgm_check_handler)
0: lg %r12,__LC_CURRENT
lghi %r11,0
lmg %r8,%r9,__LC_PGM_OLD_PSW
tmhh %r8,0x0001 # test problem state bit
jnz 3f # -> fault in user space
tmhh %r8,0x0001 # coming from user space?
jno .Lpgm_skip_asce
lctlg %c1,%c1,__LC_KERNEL_ASCE
j 3f
.Lpgm_skip_asce:
#if IS_ENABLED(CONFIG_KVM)
# cleanup critical section for program checks in sie64a
lgr %r14,%r9
@ -648,7 +650,7 @@ ENTRY(pgm_check_handler)
jhe 1f
lg %r14,__SF_SIE_CONTROL(%r15) # get control block pointer
ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
lctlg %c1,%c1,__LC_KERNEL_ASCE # load primary asce
larl %r9,sie_exit # skip forward to sie_exit
lghi %r11,_PIF_GUEST_FAULT
#endif
@ -709,10 +711,20 @@ ENTRY(pgm_check_handler)
.Lpgm_return:
LOCKDEP_SYS_EXIT
tm __PT_PSW+1(%r11),0x01 # returning to user ?
jno .Lsysc_restore
jno .Lpgm_restore
TSTMSK __PT_FLAGS(%r11),_PIF_SYSCALL
jo .Lsysc_do_syscall
j .Lsysc_tif
.Lpgm_restore:
DISABLE_INTS
TSTMSK __LC_CPU_FLAGS, _CIF_FPU
jz .Lpgm_skip_fpu
brasl %r14,load_fpu_regs
.Lpgm_skip_fpu:
mvc __LC_RETURN_PSW(16),__PT_PSW(%r11)
stpt __LC_EXIT_TIMER
lmg %r0,%r15,__PT_R0(%r11)
b __LC_RETURN_LPSWE
#
# PER event in supervisor state, must be kprobes
@ -745,7 +757,7 @@ ENTRY(io_int_handler)
stmg %r8,%r15,__LC_SAVE_AREA_ASYNC
lg %r12,__LC_CURRENT
lmg %r8,%r9,__LC_IO_OLD_PSW
SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER
SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER,__LC_INT_CLOCK
stmg %r0,%r7,__PT_R0(%r11)
# clear user controlled registers to prevent speculative use
xgr %r0,%r0
@ -759,6 +771,10 @@ ENTRY(io_int_handler)
xgr %r10,%r10
mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC
stmg %r8,%r9,__PT_PSW(%r11)
tm __PT_PSW+1(%r11),0x01 # coming from user space?
jno .Lio_skip_asce
lctlg %c1,%c1,__LC_KERNEL_ASCE
.Lio_skip_asce:
mvc __PT_INT_CODE(12,%r11),__LC_SUBCHANNEL_ID
xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
TSTMSK __LC_CPU_FLAGS,_CIF_IGNORE_IRQ
@ -790,6 +806,8 @@ ENTRY(io_int_handler)
mvc __LC_RETURN_PSW(16),__PT_PSW(%r11)
tm __PT_PSW+1(%r11),0x01 # returning to user ?
jno .Lio_exit_kernel
DEBUG_USER_ASCE
lctlg %c1,%c1,__LC_USER_ASCE
BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
stpt __LC_EXIT_TIMER
.Lio_exit_kernel:
@ -855,29 +873,8 @@ ENTRY(io_int_handler)
jo .Lio_guarded_storage
TSTMSK __LC_CPU_FLAGS,_CIF_FPU
jo .Lio_vxrs
TSTMSK __LC_CPU_FLAGS,(_CIF_ASCE_PRIMARY|_CIF_ASCE_SECONDARY)
jnz .Lio_asce
j .Lio_return
#
# _CIF_ASCE_PRIMARY and/or CIF_ASCE_SECONDARY set, load user space asce
#
.Lio_asce:
ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_SECONDARY
lctlg %c7,%c7,__LC_VDSO_ASCE # load secondary asce
TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_PRIMARY
jz .Lio_return
#ifndef CONFIG_HAVE_MARCH_Z10_FEATURES
tm __LC_STFLE_FAC_LIST+3,0x10 # has MVCOS ?
jnz .Lio_set_fs_fixup
ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_PRIMARY
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
j .Lio_return
.Lio_set_fs_fixup:
#endif
larl %r14,.Lio_return
jg set_fs_fixup
#
# CIF_FPU is set, restore floating-point controls and floating-point registers.
#
@ -945,7 +942,7 @@ ENTRY(ext_int_handler)
stmg %r8,%r15,__LC_SAVE_AREA_ASYNC
lg %r12,__LC_CURRENT
lmg %r8,%r9,__LC_EXT_OLD_PSW
SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER
SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER,__LC_INT_CLOCK
stmg %r0,%r7,__PT_R0(%r11)
# clear user controlled registers to prevent speculative use
xgr %r0,%r0
@ -959,6 +956,10 @@ ENTRY(ext_int_handler)
xgr %r10,%r10
mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC
stmg %r8,%r9,__PT_PSW(%r11)
tm __PT_PSW+1(%r11),0x01 # coming from user space?
jno .Lext_skip_asce
lctlg %c1,%c1,__LC_KERNEL_ASCE
.Lext_skip_asce:
lghi %r1,__LC_EXT_PARAMS2
mvc __PT_INT_CODE(4,%r11),__LC_EXT_CPU_ADDR
mvc __PT_INT_PARM(4,%r11),__LC_EXT_PARAMS
@ -1167,7 +1168,7 @@ ENTRY(mcck_int_handler)
TSTMSK __LC_MCCK_CODE,MCCK_CODE_PSW_IA_VALID
jno .Lmcck_panic
4: ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off
SWITCH_ASYNC __LC_GPREGS_SAVE_AREA+64,__LC_MCCK_ENTER_TIMER
SWITCH_ASYNC __LC_GPREGS_SAVE_AREA+64,__LC_MCCK_ENTER_TIMER,__LC_MCCK_CLOCK
.Lmcck_skip:
lghi %r14,__LC_GPREGS_SAVE_AREA+64
stmg %r0,%r7,__PT_R0(%r11)
@ -1183,6 +1184,9 @@ ENTRY(mcck_int_handler)
xgr %r10,%r10
mvc __PT_R8(64,%r11),0(%r14)
stmg %r8,%r9,__PT_PSW(%r11)
la %r14,4095
mvc __PT_CR1(8,%r11),__LC_CREGS_SAVE_AREA-4095+8(%r14)
lctlg %c1,%c1,__LC_KERNEL_ASCE
xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs
@ -1198,6 +1202,7 @@ ENTRY(mcck_int_handler)
brasl %r14,s390_handle_mcck
TRACE_IRQS_ON
.Lmcck_return:
lctlg %c1,%c1,__PT_CR1(%r11)
lmg %r0,%r10,__PT_R0(%r11)
mvc __LC_RETURN_MCCK_PSW(16),__PT_PSW(%r11) # move return PSW
tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
@ -1274,7 +1279,7 @@ ENDPROC(stack_overflow)
1: BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
lg %r9,__SF_SIE_CONTROL(%r15) # get control block pointer
ni __SIE_PROG0C+3(%r9),0xfe # no longer in SIE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
lctlg %c1,%c1,__LC_KERNEL_ASCE
larl %r9,sie_exit # skip forward to sie_exit
BR_EX %r14,%r11

1
arch/s390/kernel/entry.h
View File

@ -83,7 +83,6 @@ long sys_s390_sthyi(unsigned long function_code, void __user *buffer, u64 __user
DECLARE_PER_CPU(u64, mt_cycles[8]);
void gs_load_bc_cb(struct pt_regs *regs);
void set_fs_fixup(void);
unsigned long stack_alloc(void);
void stack_free(unsigned long stack);

63
arch/s390/kernel/ftrace.c
View File

@ -22,56 +22,26 @@
#include "entry.h"
/*
* The mcount code looks like this:
* stg %r14,8(%r15) # offset 0
* larl %r1,<&counter> # offset 6
* brasl %r14,_mcount # offset 12
* lg %r14,8(%r15) # offset 18
* Total length is 24 bytes. Only the first instruction will be patched
* by ftrace_make_call / ftrace_make_nop.
* The enabled ftrace code block looks like this:
* To generate function prologue either gcc's hotpatch feature (since gcc 4.8)
* or a combination of -pg -mrecord-mcount -mnop-mcount -mfentry flags
* (since gcc 9 / clang 10) is used.
* In both cases the original and also the disabled function prologue contains
* only a single six byte instruction and looks like this:
* > brcl 0,0 # offset 0
* To enable ftrace the code gets patched like above and afterwards looks
* like this:
* > brasl %r0,ftrace_caller # offset 0
* larl %r1,<&counter> # offset 6
* brasl %r14,_mcount # offset 12
* lg %r14,8(%r15) # offset 18
*
* The instruction will be patched by ftrace_make_call / ftrace_make_nop.
* The ftrace function gets called with a non-standard C function call ABI
* where r0 contains the return address. It is also expected that the called
* function only clobbers r0 and r1, but restores r2-r15.
* For module code we can't directly jump to ftrace caller, but need a
* trampoline (ftrace_plt), which clobbers also r1.
* The return point of the ftrace function has offset 24, so execution
* continues behind the mcount block.
* The disabled ftrace code block looks like this:
* > jg .+24 # offset 0
* larl %r1,<&counter> # offset 6
* brasl %r14,_mcount # offset 12
* lg %r14,8(%r15) # offset 18
* The jg instruction branches to offset 24 to skip as many instructions
* as possible.
* In case we use gcc's hotpatch feature the original and also the disabled
* function prologue contains only a single six byte instruction and looks
* like this:
* > brcl 0,0 # offset 0
* To enable ftrace the code gets patched like above and afterwards looks
* like this:
* > brasl %r0,ftrace_caller # offset 0
*/
unsigned long ftrace_plt;
static inline void ftrace_generate_orig_insn(struct ftrace_insn *insn)
{
#if defined(CC_USING_HOTPATCH) || defined(CC_USING_NOP_MCOUNT)
/* brcl 0,0 */
insn->opc = 0xc004;
insn->disp = 0;
#else
/* stg r14,8(r15) */
insn->opc = 0xe3e0;
insn->disp = 0xf0080024;
#endif
}
int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
unsigned long addr)
{
@ -85,15 +55,10 @@ int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
if (copy_from_kernel_nofault(&old, (void *) rec->ip, sizeof(old)))
return -EFAULT;
if (addr == MCOUNT_ADDR) {
/* Initial code replacement */
ftrace_generate_orig_insn(&orig);
ftrace_generate_nop_insn(&new);
} else {
/* Replace ftrace call with a nop. */
ftrace_generate_call_insn(&orig, rec->ip);
ftrace_generate_nop_insn(&new);
}
/* Replace ftrace call with a nop. */
ftrace_generate_call_insn(&orig, rec->ip);
ftrace_generate_nop_insn(&new);
/* Verify that the to be replaced code matches what we expect. */
if (memcmp(&orig, &old, sizeof(old)))
return -EINVAL;

7
arch/s390/kernel/head64.S
View File

@ -18,12 +18,7 @@
__HEAD
ENTRY(startup_continue)
tm __LC_STFLE_FAC_LIST+5,0x80 # LPP available ?
jz 0f
xc __LC_LPP+1(7,0),__LC_LPP+1 # clear lpp and current_pid
mvi __LC_LPP,0x80 # and set LPP_MAGIC
.insn s,0xb2800000,__LC_LPP # load program parameter
0: larl %r1,tod_clock_base
larl %r1,tod_clock_base
mvc 0(16,%r1),__LC_BOOT_CLOCK
larl %r13,.LPG1 # get base
#

8
arch/s390/kernel/mcount.S
View File

@ -33,11 +33,6 @@ ENDPROC(ftrace_stub)
#define TRACED_FUNC_FRAME_SIZE STACK_FRAME_OVERHEAD
#endif
ENTRY(_mcount)
BR_EX %r14
ENDPROC(_mcount)
EXPORT_SYMBOL(_mcount)
ENTRY(ftrace_caller)
.globl ftrace_regs_caller
.set ftrace_regs_caller,ftrace_caller
@ -46,9 +41,6 @@ ENTRY(ftrace_caller)
ipm %r14 # don't put any instructions
sllg %r14,%r14,16 # clobbering CC before this point
lgr %r1,%r15
#if !(defined(CC_USING_HOTPATCH) || defined(CC_USING_NOP_MCOUNT))
aghi %r0,MCOUNT_RETURN_FIXUP
#endif
# allocate stack frame for ftrace_caller to contain traced function
aghi %r15,-TRACED_FUNC_FRAME_SIZE
stg %r1,__SF_BACKCHAIN(%r15)

14
arch/s390/kernel/process.c
View File

@ -94,7 +94,6 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
/* Save access registers to new thread structure. */
save_access_regs(&p->thread.acrs[0]);
/* start new process with ar4 pointing to the correct address space */
p->thread.mm_segment = get_fs();
/* Don't copy debug registers */
memset(&p->thread.per_user, 0, sizeof(p->thread.per_user));
memset(&p->thread.per_event, 0, sizeof(p->thread.per_event));
@ -208,16 +207,3 @@ unsigned long arch_randomize_brk(struct mm_struct *mm)
ret = PAGE_ALIGN(mm->brk + brk_rnd());
return (ret > mm->brk) ? ret : mm->brk;
}
void set_fs_fixup(void)
{
struct pt_regs *regs = current_pt_regs();
static bool warned;
set_fs(USER_DS);
if (warned)
return;
WARN(1, "Unbalanced set_fs - int code: 0x%x\n", regs->int_code);
show_registers(regs);
warned = true;
}

52
arch/s390/kernel/setup.c
View File

@ -49,6 +49,7 @@
#include <linux/memory.h>
#include <linux/compat.h>
#include <linux/start_kernel.h>
#include <linux/hugetlb.h>
#include <asm/boot_data.h>
#include <asm/ipl.h>
@ -94,10 +95,8 @@ char elf_platform[ELF_PLATFORM_SIZE];
unsigned long int_hwcap = 0;
int __bootdata(noexec_disabled);
int __bootdata(memory_end_set);
unsigned long __bootdata(memory_end);
unsigned long __bootdata(ident_map_size);
unsigned long __bootdata(vmalloc_size);
unsigned long __bootdata(max_physmem_end);
struct mem_detect_info __bootdata(mem_detect);
struct exception_table_entry *__bootdata_preserved(__start_dma_ex_table);
@ -336,6 +335,7 @@ int __init arch_early_irq_init(void)
if (!stack)
panic("Couldn't allocate async stack");
S390_lowcore.async_stack = stack + STACK_INIT_OFFSET;
udelay_enable();
return 0;
}
@ -556,24 +556,25 @@ static void __init setup_resources(void)
#endif
}
static void __init setup_memory_end(void)
static void __init setup_ident_map_size(void)
{
unsigned long vmax, tmp;
/* Choose kernel address space layout: 3 or 4 levels. */
tmp = (memory_end ?: max_physmem_end) / PAGE_SIZE;
tmp = ident_map_size / PAGE_SIZE;
tmp = tmp * (sizeof(struct page) + PAGE_SIZE);
if (tmp + vmalloc_size + MODULES_LEN <= _REGION2_SIZE)
vmax = _REGION2_SIZE; /* 3-level kernel page table */
else
vmax = _REGION1_SIZE; /* 4-level kernel page table */
if (is_prot_virt_host())
adjust_to_uv_max(&vmax);
#ifdef CONFIG_KASAN
vmax = kasan_vmax;
#endif
/* module area is at the end of the kernel address space. */
MODULES_END = vmax;
if (is_prot_virt_host())
adjust_to_uv_max(&MODULES_END);
#ifdef CONFIG_KASAN
vmax = _REGION1_SIZE;
MODULES_END = kasan_vmax;
#endif
MODULES_VADDR = MODULES_END - MODULES_LEN;
VMALLOC_END = MODULES_VADDR;
VMALLOC_START = VMALLOC_END - vmalloc_size;
@ -587,22 +588,22 @@ static void __init setup_memory_end(void)
tmp = min(tmp, 1UL << MAX_PHYSMEM_BITS);
vmemmap = (struct page *) tmp;
/* Take care that memory_end is set and <= vmemmap */
memory_end = min(memory_end ?: max_physmem_end, (unsigned long)vmemmap);
/* Take care that ident_map_size <= vmemmap */
ident_map_size = min(ident_map_size, (unsigned long)vmemmap);
#ifdef CONFIG_KASAN
memory_end = min(memory_end, KASAN_SHADOW_START);
ident_map_size = min(ident_map_size, KASAN_SHADOW_START);
#endif
vmemmap_size = SECTION_ALIGN_UP(memory_end / PAGE_SIZE) * sizeof(struct page);
vmemmap_size = SECTION_ALIGN_UP(ident_map_size / PAGE_SIZE) * sizeof(struct page);
#ifdef CONFIG_KASAN
/* move vmemmap above kasan shadow only if stands in a way */
if (KASAN_SHADOW_END > (unsigned long)vmemmap &&
(unsigned long)vmemmap + vmemmap_size > KASAN_SHADOW_START)
vmemmap = max(vmemmap, (struct page *)KASAN_SHADOW_END);
#endif
max_pfn = max_low_pfn = PFN_DOWN(memory_end);
memblock_remove(memory_end, ULONG_MAX);
max_pfn = max_low_pfn = PFN_DOWN(ident_map_size);
memblock_remove(ident_map_size, ULONG_MAX);
pr_notice("The maximum memory size is %luMB\n", memory_end >> 20);
pr_notice("The maximum memory size is %luMB\n", ident_map_size >> 20);
}
#ifdef CONFIG_CRASH_DUMP
@ -632,12 +633,11 @@ static struct notifier_block kdump_mem_nb = {
#endif
/*
* Make sure that the area behind memory_end is protected
* Make sure that the area above identity mapping is protected
*/
static void __init reserve_memory_end(void)
static void __init reserve_above_ident_map(void)
{
if (memory_end_set)
memblock_reserve(memory_end, ULONG_MAX);
memblock_reserve(ident_map_size, ULONG_MAX);
}
/*
@ -674,7 +674,7 @@ static void __init reserve_crashkernel(void)
phys_addr_t low, high;
int rc;
rc = parse_crashkernel(boot_command_line, memory_end, &crash_size,
rc = parse_crashkernel(boot_command_line, ident_map_size, &crash_size,
&crash_base);
crash_base = ALIGN(crash_base, KEXEC_CRASH_MEM_ALIGN);
@ -1128,7 +1128,7 @@ void __init setup_arch(char **cmdline_p)
setup_control_program_code();
/* Do some memory reservations *before* memory is added to memblock */
reserve_memory_end();
reserve_above_ident_map();
reserve_oldmem();
reserve_kernel();
reserve_initrd();
@ -1143,10 +1143,12 @@ void __init setup_arch(char **cmdline_p)
remove_oldmem();
setup_uv();
setup_memory_end();
setup_ident_map_size();
setup_memory();
dma_contiguous_reserve(memory_end);
dma_contiguous_reserve(ident_map_size);
vmcp_cma_reserve();
if (MACHINE_HAS_EDAT2)
hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
check_initrd();
reserve_crashkernel();

32
arch/s390/kernel/smp.c
View File

@ -47,7 +47,6 @@
#include <asm/vtimer.h>
#include <asm/lowcore.h>
#include <asm/sclp.h>
#include <asm/vdso.h>
#include <asm/debug.h>
#include <asm/os_info.h>
#include <asm/sigp.h>
@ -55,6 +54,7 @@
#include <asm/nmi.h>
#include <asm/stacktrace.h>
#include <asm/topology.h>
#include <asm/vdso.h>
#include "entry.h"
enum {
@ -217,14 +217,10 @@ static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu)
lc->return_mcck_lpswe = gen_lpswe(__LC_RETURN_MCCK_PSW);
if (nmi_alloc_per_cpu(lc))
goto out_async;
if (vdso_alloc_per_cpu(lc))
goto out_mcesa;
lowcore_ptr[cpu] = lc;
pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, (u32)(unsigned long) lc);
return 0;
out_mcesa:
nmi_free_per_cpu(lc);
out_async:
stack_free(async_stack);
out:
@ -245,7 +241,6 @@ static void pcpu_free_lowcore(struct pcpu *pcpu)
pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, 0);
lowcore_ptr[pcpu - pcpu_devices] = NULL;
vdso_free_per_cpu(pcpu->lowcore);
nmi_free_per_cpu(pcpu->lowcore);
stack_free(async_stack);
if (pcpu == &pcpu_devices[0])
@ -265,13 +260,13 @@ static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu)
lc->spinlock_index = 0;
lc->percpu_offset = __per_cpu_offset[cpu];
lc->kernel_asce = S390_lowcore.kernel_asce;
lc->user_asce = S390_lowcore.kernel_asce;
lc->user_asce = s390_invalid_asce;
lc->machine_flags = S390_lowcore.machine_flags;
lc->user_timer = lc->system_timer =
lc->steal_timer = lc->avg_steal_timer = 0;
__ctl_store(lc->cregs_save_area, 0, 15);
lc->cregs_save_area[1] = lc->kernel_asce;
lc->cregs_save_area[7] = lc->vdso_asce;
lc->cregs_save_area[7] = lc->user_asce;
save_access_regs((unsigned int *) lc->access_regs_save_area);
memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list,
sizeof(lc->stfle_fac_list));
@ -859,13 +854,12 @@ static void smp_init_secondary(void)
S390_lowcore.last_update_clock = get_tod_clock();
restore_access_regs(S390_lowcore.access_regs_save_area);
set_cpu_flag(CIF_ASCE_PRIMARY);
set_cpu_flag(CIF_ASCE_SECONDARY);
cpu_init();
rcu_cpu_starting(cpu);
preempt_disable();
init_cpu_timer();
vtime_init();
vdso_getcpu_init();
pfault_init();
notify_cpu_starting(cpu);
if (topology_cpu_dedicated(cpu))
@ -896,24 +890,12 @@ static void __no_sanitize_address smp_start_secondary(void *cpuvoid)
/* Upping and downing of CPUs */
int __cpu_up(unsigned int cpu, struct task_struct *tidle)
{
struct pcpu *pcpu;
int base, i, rc;
struct pcpu *pcpu = pcpu_devices + cpu;
int rc;
pcpu = pcpu_devices + cpu;
if (pcpu->state != CPU_STATE_CONFIGURED)
return -EIO;
base = smp_get_base_cpu(cpu);
for (i = 0; i <= smp_cpu_mtid; i++) {
if (base + i < nr_cpu_ids)
if (cpu_online(base + i))
break;
}
/*
* If this is the first CPU of the core to get online
* do an initial CPU reset.
*/
if (i > smp_cpu_mtid &&
pcpu_sigp_retry(pcpu_devices + base, SIGP_INITIAL_CPU_RESET, 0) !=
if (pcpu_sigp_retry(pcpu, SIGP_INITIAL_CPU_RESET, 0) !=
SIGP_CC_ORDER_CODE_ACCEPTED)
return -EIO;

44
arch/s390/kernel/time.c
View File

@ -927,41 +927,25 @@ static ssize_t online_store(struct device *dev,
*/
static DEVICE_ATTR_RW(online);
static struct device_attribute *stp_attributes[] = {
&dev_attr_ctn_id,
&dev_attr_ctn_type,
&dev_attr_dst_offset,
&dev_attr_leap_seconds,
&dev_attr_online,
&dev_attr_leap_seconds_scheduled,
&dev_attr_stratum,
&dev_attr_time_offset,
&dev_attr_time_zone_offset,
&dev_attr_timing_mode,
&dev_attr_timing_state,
static struct attribute *stp_dev_attrs[] = {
&dev_attr_ctn_id.attr,
&dev_attr_ctn_type.attr,
&dev_attr_dst_offset.attr,
&dev_attr_leap_seconds.attr,
&dev_attr_online.attr,
&dev_attr_leap_seconds_scheduled.attr,
&dev_attr_stratum.attr,
&dev_attr_time_offset.attr,
&dev_attr_time_zone_offset.attr,
&dev_attr_timing_mode.attr,
&dev_attr_timing_state.attr,
NULL
};
ATTRIBUTE_GROUPS(stp_dev);
static int __init stp_init_sysfs(void)
{
struct device_attribute **attr;
int rc;
rc = subsys_system_register(&stp_subsys, NULL);
if (rc)
goto out;
for (attr = stp_attributes; *attr; attr++) {
rc = device_create_file(stp_subsys.dev_root, *attr);
if (rc)
goto out_unreg;
}
return 0;
out_unreg:
for (; attr >= stp_attributes; attr--)
device_remove_file(stp_subsys.dev_root, *attr);
bus_unregister(&stp_subsys);
out:
return rc;
return subsys_system_register(&stp_subsys, stp_dev_groups);
}
device_initcall(stp_init_sysfs);

58
arch/s390/kernel/vdso.c
View File

@ -29,6 +29,7 @@
#include <asm/sections.h>
#include <asm/vdso.h>
#include <asm/facility.h>
#include <asm/timex.h>
extern char vdso64_start, vdso64_end;
static void *vdso64_kbase = &vdso64_start;
@ -99,60 +100,10 @@ static union {
u8 page[PAGE_SIZE];
} vdso_data_store __page_aligned_data;
struct vdso_data *vdso_data = (struct vdso_data *)&vdso_data_store.data;
/*
* Allocate/free per cpu vdso data.
*/
#define SEGMENT_ORDER 2
int vdso_alloc_per_cpu(struct lowcore *lowcore)
void vdso_getcpu_init(void)
{
unsigned long segment_table, page_table, page_frame;
struct vdso_per_cpu_data *vd;
segment_table = __get_free_pages(GFP_KERNEL, SEGMENT_ORDER);
page_table = get_zeroed_page(GFP_KERNEL);
page_frame = get_zeroed_page(GFP_KERNEL);
if (!segment_table || !page_table || !page_frame)
goto out;
arch_set_page_dat(virt_to_page(segment_table), SEGMENT_ORDER);
arch_set_page_dat(virt_to_page(page_table), 0);
/* Initialize per-cpu vdso data page */
vd = (struct vdso_per_cpu_data *) page_frame;
vd->cpu_nr = lowcore->cpu_nr;
vd->node_id = cpu_to_node(vd->cpu_nr);
/* Set up page table for the vdso address space */
memset64((u64 *)segment_table, _SEGMENT_ENTRY_EMPTY, _CRST_ENTRIES);
memset64((u64 *)page_table, _PAGE_INVALID, PTRS_PER_PTE);
*(unsigned long *) segment_table = _SEGMENT_ENTRY + page_table;
*(unsigned long *) page_table = _PAGE_PROTECT + page_frame;
lowcore->vdso_asce = segment_table +
_ASCE_TABLE_LENGTH + _ASCE_USER_BITS + _ASCE_TYPE_SEGMENT;
lowcore->vdso_per_cpu_data = page_frame;
return 0;
out:
free_page(page_frame);
free_page(page_table);
free_pages(segment_table, SEGMENT_ORDER);
return -ENOMEM;
}
void vdso_free_per_cpu(struct lowcore *lowcore)
{
unsigned long segment_table, page_table, page_frame;
segment_table = lowcore->vdso_asce & PAGE_MASK;
page_table = *(unsigned long *) segment_table;
page_frame = *(unsigned long *) page_table;
free_page(page_frame);
free_page(page_table);
free_pages(segment_table, SEGMENT_ORDER);
set_tod_programmable_field(smp_processor_id());
}
/*
@ -225,6 +176,7 @@ static int __init vdso_init(void)
{
int i;
vdso_getcpu_init();
/* Calculate the size of the 64 bit vDSO */
vdso64_pages = ((&vdso64_end - &vdso64_start
+ PAGE_SIZE - 1) >> PAGE_SHIFT) + 1;
@ -240,8 +192,6 @@ static int __init vdso_init(void)
}
vdso64_pagelist[vdso64_pages - 1] = virt_to_page(vdso_data);
vdso64_pagelist[vdso64_pages] = NULL;
if (vdso_alloc_per_cpu(&S390_lowcore))
BUG();
get_page(virt_to_page(vdso_data));

5
arch/s390/kernel/vdso64/Makefile
View File

@ -6,8 +6,9 @@ ARCH_REL_TYPE_ABS := R_390_COPY|R_390_GLOB_DAT|R_390_JMP_SLOT|R_390_RELATIVE
ARCH_REL_TYPE_ABS += R_390_GOT|R_390_PLT
include $(srctree)/lib/vdso/Makefile
obj-vdso64 = vdso_user_wrapper.o note.o getcpu.o
obj-cvdso64 = vdso64_generic.o
obj-vdso64 = vdso_user_wrapper.o note.o
obj-cvdso64 = vdso64_generic.o getcpu.o
CFLAGS_REMOVE_getcpu.o = -pg $(CC_FLAGS_FTRACE) $(CC_FLAGS_EXPOLINE)
CFLAGS_REMOVE_vdso64_generic.o = -pg $(CC_FLAGS_FTRACE) $(CC_FLAGS_EXPOLINE)
# Build rules

31
arch/s390/kernel/vdso64/getcpu.S
View File

@ -1,31 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Userland implementation of getcpu() for 64 bits processes in a
* s390 kernel for use in the vDSO
*
* Copyright IBM Corp. 2016
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/dwarf.h>
.text
.align 4
.globl __kernel_getcpu
.type __kernel_getcpu,@function
__kernel_getcpu:
CFI_STARTPROC
sacf 256
lm %r4,%r5,__VDSO_GETCPU_VAL(%r0)
sacf 0
ltgr %r2,%r2
jz 2f
st %r5,0(%r2)
2: ltgr %r3,%r3
jz 3f
st %r4,0(%r3)
3: lghi %r2,0
br %r14
CFI_ENDPROC
.size __kernel_getcpu,.-__kernel_getcpu

21
arch/s390/kernel/vdso64/getcpu.c Normal file
View File

@ -0,0 +1,21 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright IBM Corp. 2020 */
#include <linux/compiler.h>
#include <linux/getcpu.h>
#include <asm/timex.h>
#include "vdso.h"
int __s390_vdso_getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *unused)
{
__u16 todval[8];
/* CPU number is stored in the programmable field of the TOD clock */
get_tod_clock_ext((char *)todval);
if (cpu)
*cpu = todval[7];
/* NUMA node is always zero */
if (node)
*node = 0;
return 0;
}

14
arch/s390/kernel/vdso64/vdso.h Normal file
View File

@ -0,0 +1,14 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ARCH_S390_KERNEL_VDSO64_VDSO_H
#define __ARCH_S390_KERNEL_VDSO64_VDSO_H
#include <vdso/datapage.h>
struct getcpu_cache;
int __s390_vdso_getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *unused);
int __s390_vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz);
int __s390_vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts);
int __s390_vdso_clock_getres(clockid_t clock, struct __kernel_timespec *ts);
#endif /* __ARCH_S390_KERNEL_VDSO64_VDSO_H */

1
arch/s390/kernel/vdso64/vdso64.lds.S
View File

@ -136,7 +136,6 @@ VERSION
__kernel_clock_gettime;
__kernel_clock_getres;
__kernel_getcpu;
local: *;
};
}

1
arch/s390/kernel/vdso64/vdso64_generic.c
View File

@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include "../../../../lib/vdso/gettimeofday.c"
#include "vdso.h"
int __s390_vdso_gettimeofday(struct __kernel_old_timeval *tv,
struct timezone *tz)

1
arch/s390/kernel/vdso64/vdso_user_wrapper.S
View File

@ -36,3 +36,4 @@ __kernel_\func:
vdso_func gettimeofday
vdso_func clock_getres
vdso_func clock_gettime
vdso_func getcpu

3
arch/s390/kernel/vmlinux.lds.S
View File

@ -10,7 +10,8 @@
* Put .bss..swapper_pg_dir as the first thing in .bss. This will
* make sure it has 16k alignment.
*/
#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir)
#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir) \
*(.bss..invalid_pg_dir)
/* Handle ro_after_init data on our own. */
#define RO_AFTER_INIT_DATA

13
arch/s390/lib/delay.c
View File

@ -13,11 +13,19 @@
#include <linux/export.h>
#include <linux/irqflags.h>
#include <linux/interrupt.h>
#include <linux/jump_label.h>
#include <linux/irq.h>
#include <asm/vtimer.h>
#include <asm/div64.h>
#include <asm/idle.h>
static DEFINE_STATIC_KEY_FALSE(udelay_ready);
void __init udelay_enable(void)
{
static_branch_enable(&udelay_ready);
}
void __delay(unsigned long loops)
{
/*
@ -76,6 +84,11 @@ void __udelay(unsigned long long usecs)
{
unsigned long flags;
if (!static_branch_likely(&udelay_ready)) {
udelay_simple(usecs);
return;
}
preempt_disable();
local_irq_save(flags);
if (in_irq()) {

105
arch/s390/lib/uaccess.c
View File

@ -16,6 +16,22 @@
#include <asm/mmu_context.h>
#include <asm/facility.h>
#ifdef CONFIG_DEBUG_USER_ASCE
void debug_user_asce(void)
{
unsigned long cr1, cr7;
__ctl_store(cr1, 1, 1);
__ctl_store(cr7, 7, 7);
if (cr1 == S390_lowcore.kernel_asce && cr7 == S390_lowcore.user_asce)
return;
panic("incorrect ASCE on kernel exit\n"
"cr1: %016lx cr7: %016lx\n"
"kernel: %016llx user: %016llx\n",
cr1, cr7, S390_lowcore.kernel_asce, S390_lowcore.user_asce);
}
#endif /*CONFIG_DEBUG_USER_ASCE */
#ifndef CONFIG_HAVE_MARCH_Z10_FEATURES
static DEFINE_STATIC_KEY_FALSE(have_mvcos);
@ -40,71 +56,10 @@ static inline int copy_with_mvcos(void)
}
#endif
void set_fs(mm_segment_t fs)
{
current->thread.mm_segment = fs;
if (fs == USER_DS) {
__ctl_load(S390_lowcore.user_asce, 1, 1);
clear_cpu_flag(CIF_ASCE_PRIMARY);
} else {
__ctl_load(S390_lowcore.kernel_asce, 1, 1);
set_cpu_flag(CIF_ASCE_PRIMARY);
}
if (fs & 1) {
if (fs == USER_DS_SACF)
__ctl_load(S390_lowcore.user_asce, 7, 7);
else
__ctl_load(S390_lowcore.kernel_asce, 7, 7);
set_cpu_flag(CIF_ASCE_SECONDARY);
}
}
EXPORT_SYMBOL(set_fs);
mm_segment_t enable_sacf_uaccess(void)
{
mm_segment_t old_fs;
unsigned long asce, cr;
unsigned long flags;
old_fs = current->thread.mm_segment;
if (old_fs & 1)
return old_fs;
/* protect against a concurrent page table upgrade */
local_irq_save(flags);
current->thread.mm_segment |= 1;
asce = S390_lowcore.kernel_asce;
if (likely(old_fs == USER_DS)) {
__ctl_store(cr, 1, 1);
if (cr != S390_lowcore.kernel_asce) {
__ctl_load(S390_lowcore.kernel_asce, 1, 1);
set_cpu_flag(CIF_ASCE_PRIMARY);
}
asce = S390_lowcore.user_asce;
}
__ctl_store(cr, 7, 7);
if (cr != asce) {
__ctl_load(asce, 7, 7);
set_cpu_flag(CIF_ASCE_SECONDARY);
}
local_irq_restore(flags);
return old_fs;
}
EXPORT_SYMBOL(enable_sacf_uaccess);
void disable_sacf_uaccess(mm_segment_t old_fs)
{
current->thread.mm_segment = old_fs;
if (old_fs == USER_DS && test_facility(27)) {
__ctl_load(S390_lowcore.user_asce, 1, 1);
clear_cpu_flag(CIF_ASCE_PRIMARY);
}
}
EXPORT_SYMBOL(disable_sacf_uaccess);
static inline unsigned long copy_from_user_mvcos(void *x, const void __user *ptr,
unsigned long size)
{
register unsigned long reg0 asm("0") = 0x01UL;
register unsigned long reg0 asm("0") = 0x81UL;
unsigned long tmp1, tmp2;
tmp1 = -4096UL;
@ -135,9 +90,7 @@ static inline unsigned long copy_from_user_mvcp(void *x, const void __user *ptr,
unsigned long size)
{
unsigned long tmp1, tmp2;
mm_segment_t old_fs;
old_fs = enable_sacf_uaccess();
tmp1 = -256UL;
asm volatile(
" sacf 0\n"
@ -164,7 +117,6 @@ static inline unsigned long copy_from_user_mvcp(void *x, const void __user *ptr,
EX_TABLE(7b,3b) EX_TABLE(8b,3b) EX_TABLE(9b,6b)
: "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2)
: : "cc", "memory");
disable_sacf_uaccess(old_fs);
return size;
}
@ -179,7 +131,7 @@ EXPORT_SYMBOL(raw_copy_from_user);
static inline unsigned long copy_to_user_mvcos(void __user *ptr, const void *x,
unsigned long size)
{
register unsigned long reg0 asm("0") = 0x010000UL;
register unsigned long reg0 asm("0") = 0x810000UL;
unsigned long tmp1, tmp2;
tmp1 = -4096UL;
@ -210,9 +162,7 @@ static inline unsigned long copy_to_user_mvcs(void __user *ptr, const void *x,
unsigned long size)
{
unsigned long tmp1, tmp2;
mm_segment_t old_fs;
old_fs = enable_sacf_uaccess();
tmp1 = -256UL;
asm volatile(
" sacf 0\n"
@ -239,7 +189,6 @@ static inline unsigned long copy_to_user_mvcs(void __user *ptr, const void *x,
EX_TABLE(7b,3b) EX_TABLE(8b,3b) EX_TABLE(9b,6b)
: "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2)
: : "cc", "memory");
disable_sacf_uaccess(old_fs);
return size;
}
@ -254,7 +203,7 @@ EXPORT_SYMBOL(raw_copy_to_user);
static inline unsigned long copy_in_user_mvcos(void __user *to, const void __user *from,
unsigned long size)
{
register unsigned long reg0 asm("0") = 0x010001UL;
register unsigned long reg0 asm("0") = 0x810081UL;
unsigned long tmp1, tmp2;
tmp1 = -4096UL;
@ -277,10 +226,8 @@ static inline unsigned long copy_in_user_mvcos(void __user *to, const void __use
static inline unsigned long copy_in_user_mvc(void __user *to, const void __user *from,
unsigned long size)
{
mm_segment_t old_fs;
unsigned long tmp1;
old_fs = enable_sacf_uaccess();
asm volatile(
" sacf 256\n"
" aghi %0,-1\n"
@ -304,7 +251,6 @@ static inline unsigned long copy_in_user_mvc(void __user *to, const void __user
EX_TABLE(1b,6b) EX_TABLE(2b,0b) EX_TABLE(4b,0b)
: "+a" (size), "+a" (to), "+a" (from), "=a" (tmp1)
: : "cc", "memory");
disable_sacf_uaccess(old_fs);
return size;
}
@ -318,7 +264,7 @@ EXPORT_SYMBOL(raw_copy_in_user);
static inline unsigned long clear_user_mvcos(void __user *to, unsigned long size)
{
register unsigned long reg0 asm("0") = 0x010000UL;
register unsigned long reg0 asm("0") = 0x810000UL;
unsigned long tmp1, tmp2;
tmp1 = -4096UL;
@ -346,10 +292,8 @@ static inline unsigned long clear_user_mvcos(void __user *to, unsigned long size
static inline unsigned long clear_user_xc(void __user *to, unsigned long size)
{
mm_segment_t old_fs;
unsigned long tmp1, tmp2;
old_fs = enable_sacf_uaccess();
asm volatile(
" sacf 256\n"
" aghi %0,-1\n"
@ -378,7 +322,6 @@ static inline unsigned long clear_user_xc(void __user *to, unsigned long size)
EX_TABLE(1b,6b) EX_TABLE(2b,0b) EX_TABLE(4b,0b)
: "+a" (size), "+a" (to), "=a" (tmp1), "=a" (tmp2)
: : "cc", "memory");
disable_sacf_uaccess(old_fs);
return size;
}
@ -414,15 +357,9 @@ static inline unsigned long strnlen_user_srst(const char __user *src,
unsigned long __strnlen_user(const char __user *src, unsigned long size)
{
mm_segment_t old_fs;
unsigned long len;
if (unlikely(!size))
return 0;
old_fs = enable_sacf_uaccess();
len = strnlen_user_srst(src, size);
disable_sacf_uaccess(old_fs);
return len;
return strnlen_user_srst(src, size);
}
EXPORT_SYMBOL(__strnlen_user);

2
arch/s390/mm/dump_pagetables.c
View File

@ -255,7 +255,7 @@ static int pt_dump_init(void)
*/
max_addr = (S390_lowcore.kernel_asce & _REGION_ENTRY_TYPE_MASK) >> 2;
max_addr = 1UL << (max_addr * 11 + 31);
address_markers[IDENTITY_AFTER_END_NR].start_address = memory_end;
address_markers[IDENTITY_AFTER_END_NR].start_address = ident_map_size;
address_markers[MODULES_NR].start_address = MODULES_VADDR;
address_markers[MODULES_END_NR].start_address = MODULES_END;
address_markers[VMEMMAP_NR].start_address = (unsigned long) vmemmap;

29
arch/s390/mm/fault.c
View File

@ -53,7 +53,6 @@
enum fault_type {
KERNEL_FAULT,
USER_FAULT,
VDSO_FAULT,
GMAP_FAULT,
};
@ -77,22 +76,16 @@ static enum fault_type get_fault_type(struct pt_regs *regs)
trans_exc_code = regs->int_parm_long & 3;
if (likely(trans_exc_code == 0)) {
/* primary space exception */
if (IS_ENABLED(CONFIG_PGSTE) &&
test_pt_regs_flag(regs, PIF_GUEST_FAULT))
return GMAP_FAULT;
if (current->thread.mm_segment == USER_DS)
if (user_mode(regs))
return USER_FAULT;
if (!IS_ENABLED(CONFIG_PGSTE))
return KERNEL_FAULT;
if (test_pt_regs_flag(regs, PIF_GUEST_FAULT))
return GMAP_FAULT;
return KERNEL_FAULT;
}
if (trans_exc_code == 2) {
/* secondary space exception */
if (current->thread.mm_segment & 1) {
if (current->thread.mm_segment == USER_DS_SACF)
return USER_FAULT;
return KERNEL_FAULT;
}
return VDSO_FAULT;
}
if (trans_exc_code == 2)
return USER_FAULT;
if (trans_exc_code == 1) {
/* access register mode, not used in the kernel */
return USER_FAULT;
@ -188,10 +181,6 @@ static void dump_fault_info(struct pt_regs *regs)
asce = S390_lowcore.user_asce;
pr_cont("user ");
break;
case VDSO_FAULT:
asce = S390_lowcore.vdso_asce;
pr_cont("vdso ");
break;
case GMAP_FAULT:
asce = ((struct gmap *) S390_lowcore.gmap)->asce;
pr_cont("gmap ");
@ -414,9 +403,6 @@ static inline vm_fault_t do_exception(struct pt_regs *regs, int access)
switch (type) {
case KERNEL_FAULT:
goto out;
case VDSO_FAULT:
fault = VM_FAULT_BADMAP;
goto out;
case USER_FAULT:
case GMAP_FAULT:
if (faulthandler_disabled() || !mm)
@ -834,7 +820,6 @@ void do_secure_storage_access(struct pt_regs *regs)
if (rc)
BUG();
break;
case VDSO_FAULT:
case GMAP_FAULT:
default:
do_fault_error(regs, VM_READ | VM_WRITE, VM_FAULT_BADMAP);

12
arch/s390/mm/init.c
View File

@ -49,6 +49,9 @@
#include <linux/virtio_config.h>
pgd_t swapper_pg_dir[PTRS_PER_PGD] __section(".bss..swapper_pg_dir");
static pgd_t invalid_pg_dir[PTRS_PER_PGD] __section(".bss..invalid_pg_dir");
unsigned long s390_invalid_asce;
unsigned long empty_zero_page, zero_page_mask;
EXPORT_SYMBOL(empty_zero_page);
@ -92,6 +95,9 @@ void __init paging_init(void)
unsigned long pgd_type, asce_bits;
psw_t psw;
s390_invalid_asce = (unsigned long)invalid_pg_dir;
s390_invalid_asce |= _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH;
crst_table_init((unsigned long *)invalid_pg_dir, _REGION3_ENTRY_EMPTY);
init_mm.pgd = swapper_pg_dir;
if (VMALLOC_END > _REGION2_SIZE) {
asce_bits = _ASCE_TYPE_REGION2 | _ASCE_TABLE_LENGTH;
@ -102,14 +108,14 @@ void __init paging_init(void)
}
init_mm.context.asce = (__pa(init_mm.pgd) & PAGE_MASK) | asce_bits;
S390_lowcore.kernel_asce = init_mm.context.asce;
S390_lowcore.user_asce = S390_lowcore.kernel_asce;
S390_lowcore.user_asce = s390_invalid_asce;
crst_table_init((unsigned long *) init_mm.pgd, pgd_type);
vmem_map_init();
kasan_copy_shadow(init_mm.pgd);
kasan_copy_shadow_mapping();
/* enable virtual mapping in kernel mode */
__ctl_load(S390_lowcore.kernel_asce, 1, 1);
__ctl_load(S390_lowcore.kernel_asce, 7, 7);
__ctl_load(S390_lowcore.user_asce, 7, 7);
__ctl_load(S390_lowcore.kernel_asce, 13, 13);
psw.mask = __extract_psw();
psw_bits(psw).dat = 1;

91
arch/s390/mm/kasan_init.c
View File

@ -87,7 +87,7 @@ enum populate_mode {
POPULATE_ZERO_SHADOW,
POPULATE_SHALLOW
};
static void __init kasan_early_vmemmap_populate(unsigned long address,
static void __init kasan_early_pgtable_populate(unsigned long address,
unsigned long end,
enum populate_mode mode)
{
@ -123,8 +123,7 @@ static void __init kasan_early_vmemmap_populate(unsigned long address,
pgd_populate(&init_mm, pg_dir, p4_dir);
}
if (IS_ENABLED(CONFIG_KASAN_S390_4_LEVEL_PAGING) &&
mode == POPULATE_SHALLOW) {
if (mode == POPULATE_SHALLOW) {
address = (address + P4D_SIZE) & P4D_MASK;
continue;
}
@ -143,12 +142,6 @@ static void __init kasan_early_vmemmap_populate(unsigned long address,
p4d_populate(&init_mm, p4_dir, pu_dir);
}
if (!IS_ENABLED(CONFIG_KASAN_S390_4_LEVEL_PAGING) &&
mode == POPULATE_SHALLOW) {
address = (address + PUD_SIZE) & PUD_MASK;
continue;
}
pu_dir = pud_offset(p4_dir, address);
if (pud_none(*pu_dir)) {
if (mode == POPULATE_ZERO_SHADOW &&
@ -281,7 +274,6 @@ void __init kasan_early_init(void)
unsigned long shadow_alloc_size;
unsigned long vmax_unlimited;
unsigned long initrd_end;
unsigned long asce_type;
unsigned long memsize;
unsigned long pgt_prot = pgprot_val(PAGE_KERNEL_RO);
pte_t pte_z;
@ -297,32 +289,26 @@ void __init kasan_early_init(void)
memsize = get_mem_detect_end();
if (!memsize)
kasan_early_panic("cannot detect physical memory size\n");
/* respect mem= cmdline parameter */
if (memory_end_set && memsize > memory_end)
memsize = memory_end;
if (IS_ENABLED(CONFIG_CRASH_DUMP) && OLDMEM_BASE)
memsize = min(memsize, OLDMEM_SIZE);
memsize = min(memsize, KASAN_SHADOW_START);
/*
* Kasan currently supports standby memory but only if it follows
* online memory (default allocation), i.e. no memory holes.
* - memsize represents end of online memory
* - ident_map_size represents online + standby and memory limits
* accounted.
* Kasan maps "memsize" right away.
* [0, memsize] - as identity mapping
* [__sha(0), __sha(memsize)] - shadow memory for identity mapping
* The rest [memsize, ident_map_size] if memsize < ident_map_size
* could be mapped/unmapped dynamically later during memory hotplug.
*/
memsize = min(memsize, ident_map_size);
if (IS_ENABLED(CONFIG_KASAN_S390_4_LEVEL_PAGING)) {
/* 4 level paging */
BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_START, P4D_SIZE));
BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_END, P4D_SIZE));
crst_table_init((unsigned long *)early_pg_dir,
_REGION2_ENTRY_EMPTY);
untracked_mem_end = kasan_vmax = vmax_unlimited = _REGION1_SIZE;
if (has_uv_sec_stor_limit())
kasan_vmax = min(vmax_unlimited, uv_info.max_sec_stor_addr);
asce_type = _ASCE_TYPE_REGION2;
} else {
/* 3 level paging */
BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_START, PUD_SIZE));
BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_END, PUD_SIZE));
crst_table_init((unsigned long *)early_pg_dir,
_REGION3_ENTRY_EMPTY);
untracked_mem_end = kasan_vmax = vmax_unlimited = _REGION2_SIZE;
asce_type = _ASCE_TYPE_REGION3;
}
BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_START, P4D_SIZE));
BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_END, P4D_SIZE));
crst_table_init((unsigned long *)early_pg_dir, _REGION2_ENTRY_EMPTY);
untracked_mem_end = kasan_vmax = vmax_unlimited = _REGION1_SIZE;
if (has_uv_sec_stor_limit())
kasan_vmax = min(vmax_unlimited, uv_info.max_sec_stor_addr);
/* init kasan zero shadow */
crst_table_init((unsigned long *)kasan_early_shadow_p4d,
@ -388,27 +374,25 @@ void __init kasan_early_init(void)
* +-----------------+ +- shadow end ---+
*/
/* populate kasan shadow (for identity mapping and zero page mapping) */
kasan_early_vmemmap_populate(__sha(0), __sha(memsize), POPULATE_MAP);
kasan_early_pgtable_populate(__sha(0), __sha(memsize), POPULATE_MAP);
if (IS_ENABLED(CONFIG_MODULES))
untracked_mem_end = kasan_vmax - MODULES_LEN;
if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) {
untracked_mem_end = kasan_vmax - vmalloc_size - MODULES_LEN;
/* shallowly populate kasan shadow for vmalloc and modules */
kasan_early_vmemmap_populate(__sha(untracked_mem_end),
__sha(kasan_vmax), POPULATE_SHALLOW);
kasan_early_pgtable_populate(__sha(untracked_mem_end), __sha(kasan_vmax),
POPULATE_SHALLOW);
}
/* populate kasan shadow for untracked memory */
kasan_early_vmemmap_populate(__sha(max_physmem_end),
__sha(untracked_mem_end),
kasan_early_pgtable_populate(__sha(ident_map_size), __sha(untracked_mem_end),
POPULATE_ZERO_SHADOW);
kasan_early_vmemmap_populate(__sha(kasan_vmax),
__sha(vmax_unlimited),
kasan_early_pgtable_populate(__sha(kasan_vmax), __sha(vmax_unlimited),
POPULATE_ZERO_SHADOW);
/* memory allocated for identity mapping structs will be freed later */
pgalloc_freeable = pgalloc_pos;
/* populate identity mapping */
kasan_early_vmemmap_populate(0, memsize, POPULATE_ONE2ONE);
kasan_set_pgd(early_pg_dir, asce_type);
kasan_early_pgtable_populate(0, memsize, POPULATE_ONE2ONE);
kasan_set_pgd(early_pg_dir, _ASCE_TYPE_REGION2);
kasan_enable_dat();
/* enable kasan */
init_task.kasan_depth = 0;
@ -416,7 +400,7 @@ void __init kasan_early_init(void)
sclp_early_printk("KernelAddressSanitizer initialized\n");
}
void __init kasan_copy_shadow(pgd_t *pg_dir)
void __init kasan_copy_shadow_mapping(void)
{
/*
* At this point we are still running on early pages setup early_pg_dir,
@ -428,24 +412,13 @@ void __init kasan_copy_shadow(pgd_t *pg_dir)
pgd_t *pg_dir_dst;
p4d_t *p4_dir_src;
p4d_t *p4_dir_dst;
pud_t *pu_dir_src;
pud_t *pu_dir_dst;
pg_dir_src = pgd_offset_raw(early_pg_dir, KASAN_SHADOW_START);
pg_dir_dst = pgd_offset_raw(pg_dir, KASAN_SHADOW_START);
pg_dir_dst = pgd_offset_raw(init_mm.pgd, KASAN_SHADOW_START);
p4_dir_src = p4d_offset(pg_dir_src, KASAN_SHADOW_START);
p4_dir_dst = p4d_offset(pg_dir_dst, KASAN_SHADOW_START);
if (!p4d_folded(*p4_dir_src)) {
/* 4 level paging */
memcpy(p4_dir_dst, p4_dir_src,
(KASAN_SHADOW_SIZE >> P4D_SHIFT) * sizeof(p4d_t));
return;
}
/* 3 level paging */
pu_dir_src = pud_offset(p4_dir_src, KASAN_SHADOW_START);
pu_dir_dst = pud_offset(p4_dir_dst, KASAN_SHADOW_START);
memcpy(pu_dir_dst, pu_dir_src,
(KASAN_SHADOW_SIZE >> PUD_SHIFT) * sizeof(pud_t));
memcpy(p4_dir_dst, p4_dir_src,
(KASAN_SHADOW_SIZE >> P4D_SHIFT) * sizeof(p4d_t));
}
void __init kasan_free_early_identity(void)

13
arch/s390/mm/pgalloc.c
View File

@ -70,19 +70,10 @@ static void __crst_table_upgrade(void *arg)
{
struct mm_struct *mm = arg;
/* we must change all active ASCEs to avoid the creation of new TLBs */
/* change all active ASCEs to avoid the creation of new TLBs */
if (current->active_mm == mm) {
S390_lowcore.user_asce = mm->context.asce;
if (current->thread.mm_segment == USER_DS) {
__ctl_load(S390_lowcore.user_asce, 1, 1);
/* Mark user-ASCE present in CR1 */
clear_cpu_flag(CIF_ASCE_PRIMARY);
}
if (current->thread.mm_segment == USER_DS_SACF) {
__ctl_load(S390_lowcore.user_asce, 7, 7);
/* enable_sacf_uaccess does all or nothing */
WARN_ON(!test_cpu_flag(CIF_ASCE_SECONDARY));
}
__ctl_load(S390_lowcore.user_asce, 7, 7);
}
__tlb_flush_local();
}

38
arch/s390/mm/vmem.c
View File

@ -76,20 +76,20 @@ static void vmem_pte_free(unsigned long *table)
/*
* The unused vmemmap range, which was not yet memset(PAGE_UNUSED) ranges
* from unused_pmd_start to next PMD_SIZE boundary.
* from unused_sub_pmd_start to next PMD_SIZE boundary.
*/
static unsigned long unused_pmd_start;
static unsigned long unused_sub_pmd_start;
static void vmemmap_flush_unused_pmd(void)
static void vmemmap_flush_unused_sub_pmd(void)
{
if (!unused_pmd_start)
if (!unused_sub_pmd_start)
return;
memset(__va(unused_pmd_start), PAGE_UNUSED,
ALIGN(unused_pmd_start, PMD_SIZE) - unused_pmd_start);
unused_pmd_start = 0;
memset(__va(unused_sub_pmd_start), PAGE_UNUSED,
ALIGN(unused_sub_pmd_start, PMD_SIZE) - unused_sub_pmd_start);
unused_sub_pmd_start = 0;
}
static void __vmemmap_use_sub_pmd(unsigned long start, unsigned long end)
static void vmemmap_mark_sub_pmd_used(unsigned long start, unsigned long end)
{
/*
* As we expect to add in the same granularity as we remove, it's
@ -106,24 +106,24 @@ static void vmemmap_use_sub_pmd(unsigned long start, unsigned long end)
* We only optimize if the new used range directly follows the
* previously unused range (esp., when populating consecutive sections).
*/
if (unused_pmd_start == start) {
unused_pmd_start = end;
if (likely(IS_ALIGNED(unused_pmd_start, PMD_SIZE)))
unused_pmd_start = 0;
if (unused_sub_pmd_start == start) {
unused_sub_pmd_start = end;
if (likely(IS_ALIGNED(unused_sub_pmd_start, PMD_SIZE)))
unused_sub_pmd_start = 0;
return;
}
vmemmap_flush_unused_pmd();
__vmemmap_use_sub_pmd(start, end);
vmemmap_flush_unused_sub_pmd();
vmemmap_mark_sub_pmd_used(start, end);
}
static void vmemmap_use_new_sub_pmd(unsigned long start, unsigned long end)
{
void *page = __va(ALIGN_DOWN(start, PMD_SIZE));
vmemmap_flush_unused_pmd();
vmemmap_flush_unused_sub_pmd();
/* Could be our memmap page is filled with PAGE_UNUSED already ... */
__vmemmap_use_sub_pmd(start, end);
vmemmap_mark_sub_pmd_used(start, end);
/* Mark the unused parts of the new memmap page PAGE_UNUSED. */
if (!IS_ALIGNED(start, PMD_SIZE))
@ -134,7 +134,7 @@ static void vmemmap_use_new_sub_pmd(unsigned long start, unsigned long end)
* unused range in the populated PMD.
*/
if (!IS_ALIGNED(end, PMD_SIZE))
unused_pmd_start = end;
unused_sub_pmd_start = end;
}
/* Returns true if the PMD is completely unused and can be freed. */
@ -142,7 +142,7 @@ static bool vmemmap_unuse_sub_pmd(unsigned long start, unsigned long end)
{
void *page = __va(ALIGN_DOWN(start, PMD_SIZE));
vmemmap_flush_unused_pmd();
vmemmap_flush_unused_sub_pmd();
memset(__va(start), PAGE_UNUSED, end - start);
return !memchr_inv(page, PAGE_UNUSED, PMD_SIZE);
}
@ -223,7 +223,7 @@ static int __ref modify_pmd_table(pud_t *pud, unsigned long addr,
if (!add) {
if (pmd_none(*pmd))
continue;
if (pmd_large(*pmd) && !add) {
if (pmd_large(*pmd)) {
if (IS_ALIGNED(addr, PMD_SIZE) &&
IS_ALIGNED(next, PMD_SIZE)) {
if (!direct)

4
arch/s390/pci/pci.c
View File

@ -851,8 +851,10 @@ static int __init pci_base_init(void)
if (!s390_pci_probe)
return 0;
if (!test_facility(69) || !test_facility(71))
if (!test_facility(69) || !test_facility(71)) {
pr_info("PCI is not supported because CPU facilities 69 or 71 are not available\n");
return 0;
}
if (test_facility(153) && !s390_pci_no_mio) {
static_branch_enable(&have_mio);

104
arch/s390/pci/pci_mmio.c
View File

@ -93,12 +93,10 @@ static inline int __memcpy_toio_inuser(void __iomem *dst,
{
int size, rc = 0;
u8 status = 0;
mm_segment_t old_fs;
if (!src)
return -EINVAL;
old_fs = enable_sacf_uaccess();
while (n > 0) {
size = zpci_get_max_write_size((u64 __force) dst,
(u64 __force) src, n,
@ -113,39 +111,20 @@ static inline int __memcpy_toio_inuser(void __iomem *dst,
dst += size;
n -= size;
}
disable_sacf_uaccess(old_fs);
if (rc)
zpci_err_mmio(rc, status, (__force u64) dst);
return rc;
}
static long get_pfn(unsigned long user_addr, unsigned long access,
unsigned long *pfn)
{
struct vm_area_struct *vma;
long ret;
mmap_read_lock(current->mm);
ret = -EINVAL;
vma = find_vma(current->mm, user_addr);
if (!vma)
goto out;
ret = -EACCES;
if (!(vma->vm_flags & access))
goto out;
ret = follow_pfn(vma, user_addr, pfn);
out:
mmap_read_unlock(current->mm);
return ret;
}
SYSCALL_DEFINE3(s390_pci_mmio_write, unsigned long, mmio_addr,
const void __user *, user_buffer, size_t, length)
{
u8 local_buf[64];
void __iomem *io_addr;
void *buf;
unsigned long pfn;
struct vm_area_struct *vma;
pte_t *ptep;
spinlock_t *ptl;
long ret;
if (!zpci_is_enabled())
@ -158,7 +137,7 @@ SYSCALL_DEFINE3(s390_pci_mmio_write, unsigned long, mmio_addr,
* We only support write access to MIO capable devices if we are on
* a MIO enabled system. Otherwise we would have to check for every
* address if it is a special ZPCI_ADDR and would have to do
* a get_pfn() which we don't need for MIO capable devices. Currently
* a pfn lookup which we don't need for MIO capable devices. Currently
* ISM devices are the only devices without MIO support and there is no
* known need for accessing these from userspace.
*/
@ -176,21 +155,37 @@ SYSCALL_DEFINE3(s390_pci_mmio_write, unsigned long, mmio_addr,
} else
buf = local_buf;
ret = get_pfn(mmio_addr, VM_WRITE, &pfn);
ret = -EFAULT;
if (copy_from_user(buf, user_buffer, length))
goto out_free;
mmap_read_lock(current->mm);
ret = -EINVAL;
vma = find_vma(current->mm, mmio_addr);
if (!vma)
goto out_unlock_mmap;
if (!(vma->vm_flags & (VM_IO | VM_PFNMAP)))
goto out_unlock_mmap;
ret = -EACCES;
if (!(vma->vm_flags & VM_WRITE))
goto out_unlock_mmap;
ret = follow_pte_pmd(vma->vm_mm, mmio_addr, NULL, &ptep, NULL, &ptl);
if (ret)
goto out;
io_addr = (void __iomem *)((pfn << PAGE_SHIFT) |
goto out_unlock_mmap;
io_addr = (void __iomem *)((pte_pfn(*ptep) << PAGE_SHIFT) |
(mmio_addr & ~PAGE_MASK));
ret = -EFAULT;
if ((unsigned long) io_addr < ZPCI_IOMAP_ADDR_BASE)
goto out;
if (copy_from_user(buf, user_buffer, length))
goto out;
goto out_unlock_pt;
ret = zpci_memcpy_toio(io_addr, buf, length);
out:
out_unlock_pt:
pte_unmap_unlock(ptep, ptl);
out_unlock_mmap:
mmap_read_unlock(current->mm);
out_free:
if (buf != local_buf)
kfree(buf);
return ret;
@ -248,9 +243,7 @@ static inline int __memcpy_fromio_inuser(void __user *dst,
{
int size, rc = 0;
u8 status;
mm_segment_t old_fs;
old_fs = enable_sacf_uaccess();
while (n > 0) {
size = zpci_get_max_write_size((u64 __force) src,
(u64 __force) dst, n,
@ -262,7 +255,6 @@ static inline int __memcpy_fromio_inuser(void __user *dst,
dst += size;
n -= size;
}
disable_sacf_uaccess(old_fs);
if (rc)
zpci_err_mmio(rc, status, (__force u64) dst);
return rc;
@ -274,7 +266,9 @@ SYSCALL_DEFINE3(s390_pci_mmio_read, unsigned long, mmio_addr,
u8 local_buf[64];
void __iomem *io_addr;
void *buf;
unsigned long pfn;
struct vm_area_struct *vma;
pte_t *ptep;
spinlock_t *ptl;
long ret;
if (!zpci_is_enabled())
@ -287,7 +281,7 @@ SYSCALL_DEFINE3(s390_pci_mmio_read, unsigned long, mmio_addr,
* We only support read access to MIO capable devices if we are on
* a MIO enabled system. Otherwise we would have to check for every
* address if it is a special ZPCI_ADDR and would have to do
* a get_pfn() which we don't need for MIO capable devices. Currently
* a pfn lookup which we don't need for MIO capable devices. Currently
* ISM devices are the only devices without MIO support and there is no
* known need for accessing these from userspace.
*/
@ -306,22 +300,38 @@ SYSCALL_DEFINE3(s390_pci_mmio_read, unsigned long, mmio_addr,
buf = local_buf;
}
ret = get_pfn(mmio_addr, VM_READ, &pfn);
mmap_read_lock(current->mm);
ret = -EINVAL;
vma = find_vma(current->mm, mmio_addr);
if (!vma)
goto out_unlock_mmap;
if (!(vma->vm_flags & (VM_IO | VM_PFNMAP)))
goto out_unlock_mmap;
ret = -EACCES;
if (!(vma->vm_flags & VM_WRITE))
goto out_unlock_mmap;
ret = follow_pte_pmd(vma->vm_mm, mmio_addr, NULL, &ptep, NULL, &ptl);
if (ret)
goto out;
io_addr = (void __iomem *)((pfn << PAGE_SHIFT) | (mmio_addr & ~PAGE_MASK));
goto out_unlock_mmap;
io_addr = (void __iomem *)((pte_pfn(*ptep) << PAGE_SHIFT) |
(mmio_addr & ~PAGE_MASK));
if ((unsigned long) io_addr < ZPCI_IOMAP_ADDR_BASE) {
ret = -EFAULT;
goto out;
goto out_unlock_pt;
}
ret = zpci_memcpy_fromio(buf, io_addr, length);
if (ret)
goto out;
if (copy_to_user(user_buffer, buf, length))
out_unlock_pt:
pte_unmap_unlock(ptep, ptl);
out_unlock_mmap:
mmap_read_unlock(current->mm);
if (!ret && copy_to_user(user_buffer, buf, length))
ret = -EFAULT;
out:
if (buf != local_buf)
kfree(buf);
return ret;

9
arch/s390/purgatory/head.S
View File

@ -62,14 +62,15 @@
jh 10b
.endm
.macro START_NEXT_KERNEL base
.macro START_NEXT_KERNEL base subcode
lg %r4,kernel_entry-\base(%r13)
lg %r5,load_psw_mask-\base(%r13)
ogr %r4,%r5
stg %r4,0(%r0)
xgr %r0,%r0
diag %r0,%r0,0x308
lghi %r1,\subcode
diag %r0,%r1,0x308
.endm
.text
@ -123,7 +124,7 @@ ENTRY(purgatory_start)
je .start_crash_kernel
/* start normal kernel */
START_NEXT_KERNEL .base_crash
START_NEXT_KERNEL .base_crash 0
.return_old_kernel:
lmg %r6,%r15,gprregs-.base_crash(%r13)
@ -227,7 +228,7 @@ ENTRY(purgatory_start)
MEMCPY %r9,%r10,%r11
/* start crash kernel */
START_NEXT_KERNEL .base_dst
START_NEXT_KERNEL .base_dst 1
load_psw_mask:

7
drivers/char/hw_random/s390-trng.c
View File

@ -192,14 +192,15 @@ static int trng_hwrng_read(struct hwrng *rng, void *data, size_t max, bool wait)
/*
* hwrng register struct
* The trng is suppost to have 100% entropy, and thus
* we register with a very high quality value.
* The trng is supposed to have 100% entropy, and thus we register with a very
* high quality value. If we ever have a better driver in the future, we should
* change this value again when we merge this driver.
*/
static struct hwrng trng_hwrng_dev = {
.name = "s390-trng",
.data_read = trng_hwrng_data_read,
.read = trng_hwrng_read,
.quality = 999,
.quality = 1024,
};

93
drivers/s390/block/dasd.c
View File

@ -75,7 +75,6 @@ static int dasd_flush_block_queue(struct dasd_block *);
static void dasd_device_tasklet(unsigned long);
static void dasd_block_tasklet(unsigned long);
static void do_kick_device(struct work_struct *);
static void do_restore_device(struct work_struct *);
static void do_reload_device(struct work_struct *);
static void do_requeue_requests(struct work_struct *);
static void dasd_return_cqr_cb(struct dasd_ccw_req *, void *);
@ -138,7 +137,6 @@ struct dasd_device *dasd_alloc_device(void)
INIT_LIST_HEAD(&device->ccw_queue);
timer_setup(&device->timer, dasd_device_timeout, 0);
INIT_WORK(&device->kick_work, do_kick_device);
INIT_WORK(&device->restore_device, do_restore_device);
INIT_WORK(&device->reload_device, do_reload_device);
INIT_WORK(&device->requeue_requests, do_requeue_requests);
device->state = DASD_STATE_NEW;
@ -620,26 +618,6 @@ void dasd_reload_device(struct dasd_device *device)
}
EXPORT_SYMBOL(dasd_reload_device);
/*
* dasd_restore_device will schedule a call do do_restore_device to the kernel
* event daemon.
*/
static void do_restore_device(struct work_struct *work)
{
struct dasd_device *device = container_of(work, struct dasd_device,
restore_device);
device->cdev->drv->restore(device->cdev);
dasd_put_device(device);
}
void dasd_restore_device(struct dasd_device *device)
{
dasd_get_device(device);
/* queue call to dasd_restore_device to the kernel event daemon. */
if (!schedule_work(&device->restore_device))
dasd_put_device(device);
}
/*
* Set the target state for a device and starts the state change.
*/
@ -1514,7 +1492,6 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
"start_IO: -EIO device gone, retry");
break;
case -EINVAL:
/* most likely caused in power management context */
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"start_IO: -EINVAL device currently "
"not accessible");
@ -2048,7 +2025,7 @@ static void __dasd_device_check_expire(struct dasd_device *device)
static int __dasd_device_is_unusable(struct dasd_device *device,
struct dasd_ccw_req *cqr)
{
int mask = ~(DASD_STOPPED_DC_WAIT | DASD_UNRESUMED_PM | DASD_STOPPED_NOSPC);
int mask = ~(DASD_STOPPED_DC_WAIT | DASD_STOPPED_NOSPC);
if (test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
!test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) {
@ -2112,8 +2089,7 @@ static void __dasd_device_check_path_events(struct dasd_device *device)
if (!dasd_path_get_tbvpm(device))
return;
if (device->stopped &
~(DASD_STOPPED_DC_WAIT | DASD_UNRESUMED_PM))
if (device->stopped & ~(DASD_STOPPED_DC_WAIT))
return;
rc = device->discipline->verify_path(device,
dasd_path_get_tbvpm(device));
@ -3794,11 +3770,6 @@ int dasd_generic_path_operational(struct dasd_device *device)
"operational\n");
DBF_DEV_EVENT(DBF_WARNING, device, "%s", "path operational");
dasd_device_remove_stop_bits(device, DASD_STOPPED_DC_WAIT);
if (device->stopped & DASD_UNRESUMED_PM) {
dasd_device_remove_stop_bits(device, DASD_UNRESUMED_PM);
dasd_restore_device(device);
return 1;
}
dasd_schedule_device_bh(device);
if (device->block) {
dasd_schedule_block_bh(device->block);
@ -4058,66 +4029,6 @@ void dasd_schedule_requeue(struct dasd_device *device)
}
EXPORT_SYMBOL(dasd_schedule_requeue);
int dasd_generic_pm_freeze(struct ccw_device *cdev)
{
struct dasd_device *device = dasd_device_from_cdev(cdev);
if (IS_ERR(device))
return PTR_ERR(device);
/* mark device as suspended */
set_bit(DASD_FLAG_SUSPENDED, &device->flags);
if (device->discipline->freeze)
device->discipline->freeze(device);
/* disallow new I/O */
dasd_device_set_stop_bits(device, DASD_STOPPED_PM);
return dasd_generic_requeue_all_requests(device);
}
EXPORT_SYMBOL_GPL(dasd_generic_pm_freeze);
int dasd_generic_restore_device(struct ccw_device *cdev)
{
struct dasd_device *device = dasd_device_from_cdev(cdev);
int rc = 0;
if (IS_ERR(device))
return PTR_ERR(device);
/* allow new IO again */
dasd_device_remove_stop_bits(device,
(DASD_STOPPED_PM | DASD_UNRESUMED_PM));
dasd_schedule_device_bh(device);
/*
* call discipline restore function
* if device is stopped do nothing e.g. for disconnected devices
*/
if (device->discipline->restore && !(device->stopped))
rc = device->discipline->restore(device);
if (rc || device->stopped)
/*
* if the resume failed for the DASD we put it in
* an UNRESUMED stop state
*/
device->stopped |= DASD_UNRESUMED_PM;
if (device->block) {
dasd_schedule_block_bh(device->block);
if (device->block->request_queue)
blk_mq_run_hw_queues(device->block->request_queue,
true);
}
clear_bit(DASD_FLAG_SUSPENDED, &device->flags);
dasd_put_device(device);
return 0;
}
EXPORT_SYMBOL_GPL(dasd_generic_restore_device);
static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
int rdc_buffer_size,
int magic)

94
drivers/s390/block/dasd_eckd.c
View File

@ -5716,95 +5716,6 @@ static void dasd_eckd_dump_sense(struct dasd_device *device,
}
}
static int dasd_eckd_pm_freeze(struct dasd_device *device)
{
/*
* the device should be disconnected from our LCU structure
* on restore we will reconnect it and reread LCU specific
* information like PAV support that might have changed
*/
dasd_alias_remove_device(device);
dasd_alias_disconnect_device_from_lcu(device);
return 0;
}
static int dasd_eckd_restore_device(struct dasd_device *device)
{
struct dasd_eckd_private *private = device->private;
struct dasd_eckd_characteristics temp_rdc_data;
int rc;
struct dasd_uid temp_uid;
unsigned long flags;
unsigned long cqr_flags = 0;
/* Read Configuration Data */
rc = dasd_eckd_read_conf(device);
if (rc) {
DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
"Read configuration data failed, rc=%d", rc);
goto out_err;
}
dasd_eckd_get_uid(device, &temp_uid);
/* Generate device unique id */
rc = dasd_eckd_generate_uid(device);
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
dev_err(&device->cdev->dev, "The UID of the DASD has "
"changed\n");
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
if (rc)
goto out_err;
/* register lcu with alias handling, enable PAV if this is a new lcu */
rc = dasd_alias_make_device_known_to_lcu(device);
if (rc)
goto out_err;
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
dasd_eckd_validate_server(device, cqr_flags);
/* RE-Read Configuration Data */
rc = dasd_eckd_read_conf(device);
if (rc) {
DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
"Read configuration data failed, rc=%d", rc);
goto out_err2;
}
/* Read Feature Codes */
dasd_eckd_read_features(device);
/* Read Volume Information */
dasd_eckd_read_vol_info(device);
/* Read Extent Pool Information */
dasd_eckd_read_ext_pool_info(device);
/* Read Device Characteristics */
rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
&temp_rdc_data, 64);
if (rc) {
DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
"Read device characteristic failed, rc=%d", rc);
goto out_err2;
}
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
/* add device to alias management */
dasd_alias_add_device(device);
return 0;
out_err2:
dasd_alias_disconnect_device_from_lcu(device);
out_err:
return -1;
}
static int dasd_eckd_reload_device(struct dasd_device *device)
{
struct dasd_eckd_private *private = device->private;
@ -6668,9 +6579,6 @@ static struct ccw_driver dasd_eckd_driver = {
.notify = dasd_generic_notify,
.path_event = dasd_generic_path_event,
.shutdown = dasd_generic_shutdown,
.freeze = dasd_generic_pm_freeze,
.thaw = dasd_generic_restore_device,
.restore = dasd_generic_restore_device,
.uc_handler = dasd_generic_uc_handler,
.int_class = IRQIO_DAS,
};
@ -6702,8 +6610,6 @@ static struct dasd_discipline dasd_eckd_discipline = {
.dump_sense_dbf = dasd_eckd_dump_sense_dbf,
.fill_info = dasd_eckd_fill_info,
.ioctl = dasd_eckd_ioctl,
.freeze = dasd_eckd_pm_freeze,
.restore = dasd_eckd_restore_device,
.reload = dasd_eckd_reload_device,
.get_uid = dasd_eckd_get_uid,
.kick_validate = dasd_eckd_kick_validate_server,

3
drivers/s390/block/dasd_fba.c
View File

@ -79,9 +79,6 @@ static struct ccw_driver dasd_fba_driver = {
.set_online = dasd_fba_set_online,
.notify = dasd_generic_notify,
.path_event = dasd_generic_path_event,
.freeze = dasd_generic_pm_freeze,
.thaw = dasd_generic_restore_device,
.restore = dasd_generic_restore_device,
.int_class = IRQIO_DAS,
};

10
drivers/s390/block/dasd_int.h
View File

@ -355,10 +355,6 @@ struct dasd_discipline {
int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
/* suspend/resume functions */
int (*freeze) (struct dasd_device *);
int (*restore) (struct dasd_device *);
/* reload device after state change */
int (*reload) (struct dasd_device *);
@ -520,7 +516,6 @@ struct dasd_device {
atomic_t tasklet_scheduled;
struct tasklet_struct tasklet;
struct work_struct kick_work;
struct work_struct restore_device;
struct work_struct reload_device;
struct work_struct kick_validate;
struct work_struct suc_work;
@ -592,8 +587,6 @@ struct dasd_queue {
#define DASD_STOPPED_PENDING 4 /* long busy */
#define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */
#define DASD_STOPPED_SU 16 /* summary unit check handling */
#define DASD_STOPPED_PM 32 /* pm state transition */
#define DASD_UNRESUMED_PM 64 /* pm resume failed state */
#define DASD_STOPPED_NOSPC 128 /* no space left */
/* per device flags */
@ -753,7 +746,6 @@ enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved);
void dasd_enable_device(struct dasd_device *);
void dasd_set_target_state(struct dasd_device *, int);
void dasd_kick_device(struct dasd_device *);
void dasd_restore_device(struct dasd_device *);
void dasd_reload_device(struct dasd_device *);
void dasd_schedule_requeue(struct dasd_device *);
@ -785,8 +777,6 @@ int dasd_generic_path_operational(struct dasd_device *);
void dasd_generic_shutdown(struct ccw_device *);
void dasd_generic_handle_state_change(struct dasd_device *);
int dasd_generic_pm_freeze(struct ccw_device *);
int dasd_generic_restore_device(struct ccw_device *);
enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
void dasd_generic_path_event(struct ccw_device *, int *);
int dasd_generic_verify_path(struct dasd_device *, __u8);

85
drivers/s390/char/con3215.c
View File

@ -289,16 +289,14 @@ static void raw3215_timeout(struct timer_list *t)
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
raw->flags &= ~RAW3215_TIMER_RUNS;
if (!tty_port_suspended(&raw->port)) {
raw3215_mk_write_req(raw);
raw3215_start_io(raw);
if ((raw->queued_read || raw->queued_write) &&
!(raw->flags & RAW3215_WORKING) &&
!(raw->flags & RAW3215_TIMER_RUNS)) {
raw->timer.expires = RAW3215_TIMEOUT + jiffies;
add_timer(&raw->timer);
raw->flags |= RAW3215_TIMER_RUNS;
}
raw3215_mk_write_req(raw);
raw3215_start_io(raw);
if ((raw->queued_read || raw->queued_write) &&
!(raw->flags & RAW3215_WORKING) &&
!(raw->flags & RAW3215_TIMER_RUNS)) {
raw->timer.expires = RAW3215_TIMEOUT + jiffies;
add_timer(&raw->timer);
raw->flags |= RAW3215_TIMER_RUNS;
}
spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
}
@ -311,7 +309,7 @@ static void raw3215_timeout(struct timer_list *t)
*/
static inline void raw3215_try_io(struct raw3215_info *raw)
{
if (!tty_port_initialized(&raw->port) || tty_port_suspended(&raw->port))
if (!tty_port_initialized(&raw->port))
return;
if (raw->queued_read != NULL)
raw3215_start_io(raw);
@ -463,26 +461,6 @@ put_tty:
tty_kref_put(tty);
}
/*
* Drop the oldest line from the output buffer.
*/
static void raw3215_drop_line(struct raw3215_info *raw)
{
int ix;
char ch;
BUG_ON(raw->written != 0);
ix = (raw->head - raw->count) & (RAW3215_BUFFER_SIZE - 1);
while (raw->count > 0) {
ch = raw->buffer[ix];
ix = (ix + 1) & (RAW3215_BUFFER_SIZE - 1);
raw->count--;
if (ch == 0x15)
break;
}
raw->head = ix;
}
/*
* Wait until length bytes are available int the output buffer.
* Has to be called with the s390irq lock held. Can be called
@ -491,13 +469,6 @@ static void raw3215_drop_line(struct raw3215_info *raw)
static void raw3215_make_room(struct raw3215_info *raw, unsigned int length)
{
while (RAW3215_BUFFER_SIZE - raw->count < length) {
/* While console is frozen for suspend we have no other
* choice but to drop message from the buffer to make
* room for even more messages. */
if (tty_port_suspended(&raw->port)) {
raw3215_drop_line(raw);
continue;
}
/* there might be a request pending */
raw->flags |= RAW3215_FLUSHING;
raw3215_mk_write_req(raw);
@ -763,36 +734,6 @@ static int raw3215_set_offline (struct ccw_device *cdev)
return 0;
}
static int raw3215_pm_stop(struct ccw_device *cdev)
{
struct raw3215_info *raw;
unsigned long flags;
/* Empty the output buffer, then prevent new I/O. */
raw = dev_get_drvdata(&cdev->dev);
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
raw3215_make_room(raw, RAW3215_BUFFER_SIZE);
tty_port_set_suspended(&raw->port, 1);
spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
return 0;
}
static int raw3215_pm_start(struct ccw_device *cdev)
{
struct raw3215_info *raw;
unsigned long flags;
/* Allow I/O again and flush output buffer. */
raw = dev_get_drvdata(&cdev->dev);
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
tty_port_set_suspended(&raw->port, 0);
raw->flags |= RAW3215_FLUSHING;
raw3215_try_io(raw);
raw->flags &= ~RAW3215_FLUSHING;
spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
return 0;
}
static struct ccw_device_id raw3215_id[] = {
{ CCW_DEVICE(0x3215, 0) },
{ /* end of list */ },
@ -808,9 +749,6 @@ static struct ccw_driver raw3215_ccw_driver = {
.remove = &raw3215_remove,
.set_online = &raw3215_set_online,
.set_offline = &raw3215_set_offline,
.freeze = &raw3215_pm_stop,
.thaw = &raw3215_pm_start,
.restore = &raw3215_pm_start,
.int_class = IRQIO_C15,
};
@ -858,11 +796,6 @@ static void con3215_flush(void)
unsigned long flags;
raw = raw3215[0]; /* console 3215 is the first one */
if (tty_port_suspended(&raw->port))
/* The console is still frozen for suspend. */
if (ccw_device_force_console(raw->cdev))
/* Forcing didn't work, no panic message .. */
return;
spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
raw3215_make_room(raw, RAW3215_BUFFER_SIZE);
spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);

1
drivers/s390/char/con3270.c
View File

@ -544,7 +544,6 @@ con3270_flush(void)
cp = condev;
if (!cp->view.dev)
return;
raw3270_pm_unfreeze(&cp->view);
raw3270_activate_view(&cp->view);
spin_lock_irqsave(&cp->view.lock, flags);
con3270_wait_write(cp);

78
drivers/s390/char/raw3270.c
View File

@ -67,7 +67,6 @@ struct raw3270 {
#define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */
#define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */
#define RAW3270_FLAGS_CONSOLE 2 /* Device is the console. */
#define RAW3270_FLAGS_FROZEN 3 /* set if 3270 is frozen for suspend */
/* Semaphore to protect global data of raw3270 (devices, views, etc). */
static DEFINE_MUTEX(raw3270_mutex);
@ -260,8 +259,7 @@ raw3270_view_active(struct raw3270_view *view)
{
struct raw3270 *rp = view->dev;
return rp && rp->view == view &&
!test_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
return rp && rp->view == view;
}
int
@ -273,8 +271,7 @@ raw3270_start(struct raw3270_view *view, struct raw3270_request *rq)
spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags);
rp = view->dev;
if (!rp || rp->view != view ||
test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
if (!rp || rp->view != view)
rc = -EACCES;
else if (!raw3270_state_ready(rp))
rc = -EBUSY;
@ -291,8 +288,7 @@ raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq)
int rc;
rp = view->dev;
if (!rp || rp->view != view ||
test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
if (!rp || rp->view != view)
rc = -EACCES;
else if (!raw3270_state_ready(rp))
rc = -EBUSY;
@ -629,8 +625,7 @@ raw3270_reset(struct raw3270_view *view)
int rc;
rp = view->dev;
if (!rp || rp->view != view ||
test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
if (!rp || rp->view != view)
rc = -EACCES;
else if (!raw3270_state_ready(rp))
rc = -EBUSY;
@ -854,8 +849,6 @@ raw3270_activate_view(struct raw3270_view *view)
rc = 0;
else if (!raw3270_state_ready(rp))
rc = -EBUSY;
else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
rc = -EACCES;
else {
oldview = NULL;
if (rp->view && rp->view->fn->deactivate) {
@ -903,8 +896,7 @@ raw3270_deactivate_view(struct raw3270_view *view)
list_del_init(&view->list);
list_add_tail(&view->list, &rp->view_list);
/* Try to activate another view. */
if (raw3270_state_ready(rp) &&
!test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) {
if (raw3270_state_ready(rp)) {
list_for_each_entry(view, &rp->view_list, list) {
rp->view = view;
if (view->fn->activate(view) == 0)
@ -999,8 +991,7 @@ raw3270_del_view(struct raw3270_view *view)
rp->view = NULL;
}
list_del_init(&view->list);
if (!rp->view && raw3270_state_ready(rp) &&
!test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) {
if (!rp->view && raw3270_state_ready(rp)) {
/* Try to activate another view. */
list_for_each_entry(nv, &rp->view_list, list) {
if (nv->fn->activate(nv) == 0) {
@ -1215,60 +1206,6 @@ raw3270_set_offline (struct ccw_device *cdev)
return 0;
}
static int raw3270_pm_stop(struct ccw_device *cdev)
{
struct raw3270 *rp;
struct raw3270_view *view;
unsigned long flags;
rp = dev_get_drvdata(&cdev->dev);
if (!rp)
return 0;
spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
if (rp->view && rp->view->fn->deactivate)
rp->view->fn->deactivate(rp->view);
if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) {
/*
* Release tty and fullscreen for all non-console
* devices.
*/
list_for_each_entry(view, &rp->view_list, list) {
if (view->fn->release)
view->fn->release(view);
}
}
set_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
return 0;
}
static int raw3270_pm_start(struct ccw_device *cdev)
{
struct raw3270 *rp;
unsigned long flags;
rp = dev_get_drvdata(&cdev->dev);
if (!rp)
return 0;
spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
if (rp->view && rp->view->fn->activate)
rp->view->fn->activate(rp->view);
spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
return 0;
}
void raw3270_pm_unfreeze(struct raw3270_view *view)
{
#ifdef CONFIG_TN3270_CONSOLE
struct raw3270 *rp;
rp = view->dev;
if (rp && test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
ccw_device_force_console(rp->cdev);
#endif
}
static struct ccw_device_id raw3270_id[] = {
{ CCW_DEVICE(0x3270, 0) },
{ CCW_DEVICE(0x3271, 0) },
@ -1294,9 +1231,6 @@ static struct ccw_driver raw3270_ccw_driver = {
.remove = &raw3270_remove,
.set_online = &raw3270_set_online,
.set_offline = &raw3270_set_offline,
.freeze = &raw3270_pm_stop,
.thaw = &raw3270_pm_start,
.restore = &raw3270_pm_start,
.int_class = IRQIO_C70,
};

1
drivers/s390/char/raw3270.h
View File

@ -199,7 +199,6 @@ struct raw3270_notifier {
int raw3270_register_notifier(struct raw3270_notifier *);
void raw3270_unregister_notifier(struct raw3270_notifier *);
void raw3270_pm_unfreeze(struct raw3270_view *);
/*
* Little memory allocator for string objects.

10
drivers/s390/char/sclp.h
View File

@ -156,7 +156,11 @@ struct read_cpu_info_sccb {
u16 offset_configured;
u16 nr_standby;
u16 offset_standby;
u8 reserved[4096 - 16];
/*
* Without ext sccb, struct size is PAGE_SIZE.
* With ext sccb, struct size is EXT_SCCB_READ_CPU.
*/
u8 reserved[];
} __attribute__((packed, aligned(PAGE_SIZE)));
struct read_info_sccb {
@ -199,7 +203,7 @@ struct read_info_sccb {
u8 byte_134; /* 134 */
u8 cpudirq; /* 135 */
u16 cbl; /* 136-137 */
u8 _pad_138[4096 - 138]; /* 138-4095 */
u8 _pad_138[EXT_SCCB_READ_SCP - 138];
} __packed __aligned(PAGE_SIZE);
struct read_storage_sccb {
@ -328,7 +332,7 @@ unsigned int sclp_early_con_check_vt220(struct init_sccb *sccb);
int sclp_early_set_event_mask(struct init_sccb *sccb,
sccb_mask_t receive_mask,
sccb_mask_t send_mask);
int sclp_early_get_info(struct read_info_sccb *info);
struct read_info_sccb * __init sclp_early_get_info(void);
/* useful inlines */

16
drivers/s390/char/sclp_cmd.c
View File

@ -27,6 +27,7 @@
#include <asm/page.h>
#include <asm/sclp.h>
#include <asm/numa.h>
#include <asm/facility.h>
#include "sclp.h"
@ -87,14 +88,17 @@ out:
int _sclp_get_core_info(struct sclp_core_info *info)
{
int rc;
int length = test_facility(140) ? EXT_SCCB_READ_CPU : PAGE_SIZE;
struct read_cpu_info_sccb *sccb;
if (!SCLP_HAS_CPU_INFO)
return -EOPNOTSUPP;
sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
sccb = (void *)__get_free_pages(GFP_KERNEL | GFP_DMA | __GFP_ZERO, get_order(length));
if (!sccb)
return -ENOMEM;
sccb->header.length = sizeof(*sccb);
sccb->header.length = length;
sccb->header.control_mask[2] = 0x80;
rc = sclp_sync_request_timeout(SCLP_CMDW_READ_CPU_INFO, sccb,
SCLP_QUEUE_INTERVAL);
if (rc)
@ -107,7 +111,7 @@ int _sclp_get_core_info(struct sclp_core_info *info)
}
sclp_fill_core_info(info, sccb);
out:
free_page((unsigned long) sccb);
free_pages((unsigned long) sccb, get_order(length));
return rc;
}
@ -397,10 +401,10 @@ static void __init add_memory_merged(u16 rn)
goto skip_add;
if (start + size > VMEM_MAX_PHYS)
size = VMEM_MAX_PHYS - start;
if (memory_end_set && (start >= memory_end))
if (start >= ident_map_size)
goto skip_add;
if (memory_end_set && (start + size > memory_end))
size = memory_end - start;
if (start + size > ident_map_size)
size = ident_map_size - start;
block_size = memory_block_size_bytes();
align_to_block_size(&start, &size, block_size);
if (!size)

59
drivers/s390/char/sclp_early.c
View File

@ -9,9 +9,12 @@
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/errno.h>
#include <linux/memblock.h>
#include <asm/ctl_reg.h>
#include <asm/sclp.h>
#include <asm/ipl.h>
#include <asm/setup.h>
#include <asm/facility.h>
#include "sclp_sdias.h"
#include "sclp.h"
@ -20,12 +23,14 @@ static struct sclp_ipl_info sclp_ipl_info;
struct sclp_info sclp;
EXPORT_SYMBOL(sclp);
static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
static void __init sclp_early_facilities_detect(void)
{
struct sclp_core_entry *cpue;
struct read_info_sccb *sccb;
u16 boot_cpu_address, cpu;
if (sclp_early_get_info(sccb))
sccb = sclp_early_get_info();
if (!sccb)
return;
sclp.facilities = sccb->facilities;
@ -107,29 +112,34 @@ void __init sclp_early_get_ipl_info(struct sclp_ipl_info *info)
*info = sclp_ipl_info;
}
static struct sclp_core_info sclp_early_core_info __initdata;
static int sclp_early_core_info_valid __initdata;
static void __init sclp_early_init_core_info(struct read_cpu_info_sccb *sccb)
{
if (!SCLP_HAS_CPU_INFO)
return;
memset(sccb, 0, sizeof(*sccb));
sccb->header.length = sizeof(*sccb);
if (sclp_early_cmd(SCLP_CMDW_READ_CPU_INFO, sccb))
return;
if (sccb->header.response_code != 0x0010)
return;
sclp_fill_core_info(&sclp_early_core_info, sccb);
sclp_early_core_info_valid = 1;
}
int __init sclp_early_get_core_info(struct sclp_core_info *info)
{
if (!sclp_early_core_info_valid)
return -EIO;
*info = sclp_early_core_info;
return 0;
struct read_cpu_info_sccb *sccb;
int length = test_facility(140) ? EXT_SCCB_READ_CPU : PAGE_SIZE;
int rc = 0;
if (!SCLP_HAS_CPU_INFO)
return -EOPNOTSUPP;
sccb = memblock_alloc_low(length, PAGE_SIZE);
if (!sccb)
return -ENOMEM;
memset(sccb, 0, length);
sccb->header.length = length;
sccb->header.control_mask[2] = 0x80;
if (sclp_early_cmd(SCLP_CMDW_READ_CPU_INFO, sccb)) {
rc = -EIO;
goto out;
}
if (sccb->header.response_code != 0x0010) {
rc = -EIO;
goto out;
}
sclp_fill_core_info(info, sccb);
out:
memblock_free_early((unsigned long)sccb, length);
return rc;
}
static void __init sclp_early_console_detect(struct init_sccb *sccb)
@ -148,8 +158,7 @@ void __init sclp_early_detect(void)
{
void *sccb = sclp_early_sccb;
sclp_early_facilities_detect(sccb);
sclp_early_init_core_info(sccb);
sclp_early_facilities_detect();
/*
* Turn off SCLP event notifications. Also save remote masks in the

13
drivers/s390/char/sclp_early_core.c
View File

@ -11,6 +11,7 @@
#include <asm/irq.h>
#include <asm/sections.h>
#include <asm/mem_detect.h>
#include <asm/facility.h>
#include "sclp.h"
#include "sclp_rw.h"
@ -237,13 +238,14 @@ void sclp_early_printk(const char *str)
int __init sclp_early_read_info(void)
{
int i;
int length = test_facility(140) ? EXT_SCCB_READ_SCP : PAGE_SIZE;
struct read_info_sccb *sccb = &sclp_info_sccb;
sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED,
SCLP_CMDW_READ_SCP_INFO};
for (i = 0; i < ARRAY_SIZE(commands); i++) {
memset(sccb, 0, sizeof(*sccb));
sccb->header.length = sizeof(*sccb);
memset(sccb, 0, length);
sccb->header.length = length;
sccb->header.function_code = 0x80;
sccb->header.control_mask[2] = 0x80;
if (sclp_early_cmd(commands[i], sccb))
@ -258,13 +260,12 @@ int __init sclp_early_read_info(void)
return -EIO;
}
int __init sclp_early_get_info(struct read_info_sccb *info)
struct read_info_sccb * __init sclp_early_get_info(void)
{
if (!sclp_info_sccb_valid)
return -EIO;
return NULL;
*info = sclp_info_sccb;
return 0;
return &sclp_info_sccb;
}
int __init sclp_early_get_memsize(unsigned long *mem)

1
drivers/s390/char/tape.h
View File

@ -264,7 +264,6 @@ extern void tape_state_set(struct tape_device *, enum tape_state);
extern int tape_generic_online(struct tape_device *, struct tape_discipline *);
extern int tape_generic_offline(struct ccw_device *);
extern int tape_generic_pm_suspend(struct ccw_device *);
/* Externals from tape_devmap.c */
extern int tape_generic_probe(struct ccw_device *);

1
drivers/s390/char/tape_34xx.c
View File

@ -1191,7 +1191,6 @@ static struct ccw_driver tape_34xx_driver = {
.remove = tape_generic_remove,
.set_online = tape_34xx_online,
.set_offline = tape_generic_offline,
.freeze = tape_generic_pm_suspend,
.int_class = IRQIO_TAP,
};

1
drivers/s390/char/tape_3590.c
View File

@ -1651,7 +1651,6 @@ static struct ccw_driver tape_3590_driver = {
.remove = tape_generic_remove,
.set_offline = tape_generic_offline,
.set_online = tape_3590_online,
.freeze = tape_generic_pm_suspend,
.int_class = IRQIO_TAP,
};

50
drivers/s390/char/tape_core.c
View File

@ -427,55 +427,6 @@ tape_cleanup_device(struct tape_device *device)
tape_med_state_set(device, MS_UNKNOWN);
}
/*
* Suspend device.
*
* Called by the common I/O layer if the drive should be suspended on user
* request. We refuse to suspend if the device is loaded or in use for the
* following reason:
* While the Linux guest is suspended, it might be logged off which causes
* devices to be detached. Tape devices are automatically rewound and unloaded
* during DETACH processing (unless the tape device was attached with the
* NOASSIGN or MULTIUSER option). After rewind/unload, there is no way to
* resume the original state of the tape device, since we would need to
* manually re-load the cartridge which was active at suspend time.
*/
int tape_generic_pm_suspend(struct ccw_device *cdev)
{
struct tape_device *device;
device = dev_get_drvdata(&cdev->dev);
if (!device) {
return -ENODEV;
}
DBF_LH(3, "(%08x): tape_generic_pm_suspend(%p)\n",
device->cdev_id, device);
if (device->medium_state != MS_UNLOADED) {
pr_err("A cartridge is loaded in tape device %s, "
"refusing to suspend\n", dev_name(&cdev->dev));
return -EBUSY;
}
spin_lock_irq(get_ccwdev_lock(device->cdev));
switch (device->tape_state) {
case TS_INIT:
case TS_NOT_OPER:
case TS_UNUSED:
spin_unlock_irq(get_ccwdev_lock(device->cdev));
break;
default:
pr_err("Tape device %s is busy, refusing to "
"suspend\n", dev_name(&cdev->dev));
spin_unlock_irq(get_ccwdev_lock(device->cdev));
return -EBUSY;
}
DBF_LH(3, "(%08x): Drive suspended.\n", device->cdev_id);
return 0;
}
/*
* Set device offline.
*
@ -1360,7 +1311,6 @@ EXPORT_SYMBOL(tape_generic_remove);
EXPORT_SYMBOL(tape_generic_probe);
EXPORT_SYMBOL(tape_generic_online);
EXPORT_SYMBOL(tape_generic_offline);
EXPORT_SYMBOL(tape_generic_pm_suspend);
EXPORT_SYMBOL(tape_put_device);
EXPORT_SYMBOL(tape_get_device);
EXPORT_SYMBOL(tape_state_verbose);

24
drivers/s390/char/vmur.c
View File

@ -62,7 +62,6 @@ static int ur_probe(struct ccw_device *cdev);
static void ur_remove(struct ccw_device *cdev);
static int ur_set_online(struct ccw_device *cdev);
static int ur_set_offline(struct ccw_device *cdev);
static int ur_pm_suspend(struct ccw_device *cdev);
static struct ccw_driver ur_driver = {
.driver = {
@ -74,7 +73,6 @@ static struct ccw_driver ur_driver = {
.remove = ur_remove,
.set_online = ur_set_online,
.set_offline = ur_set_offline,
.freeze = ur_pm_suspend,
.int_class = IRQIO_VMR,
};
@ -164,28 +162,6 @@ static void urdev_put(struct urdev *urd)
urdev_free(urd);
}
/*
* State and contents of ur devices can be changed by class D users issuing
* CP commands such as PURGE or TRANSFER, while the Linux guest is suspended.
* Also the Linux guest might be logged off, which causes all active spool
* files to be closed.
* So we cannot guarantee that spool files are still the same when the Linux
* guest is resumed. In order to avoid unpredictable results at resume time
* we simply refuse to suspend if a ur device node is open.
*/
static int ur_pm_suspend(struct ccw_device *cdev)
{
struct urdev *urd = dev_get_drvdata(&cdev->dev);
TRACE("ur_pm_suspend: cdev=%p\n", cdev);
if (urd->open_flag) {
pr_err("Unit record device %s is busy, %s refusing to "
"suspend.\n", dev_name(&cdev->dev), ur_banner);
return -EBUSY;
}
return 0;
}
/*
* Low-level functions to do I/O to a ur device.
* alloc_chan_prog

29
drivers/s390/cio/chsc_sch.c
View File

@ -120,31 +120,6 @@ static void chsc_subchannel_shutdown(struct subchannel *sch)
cio_disable_subchannel(sch);
}
static int chsc_subchannel_prepare(struct subchannel *sch)
{
int cc;
struct schib schib;
/*
* Don't allow suspend while the subchannel is not idle
* since we don't have a way to clear the subchannel and
* cannot disable it with a request running.
*/
cc = stsch(sch->schid, &schib);
if (!cc && scsw_stctl(&schib.scsw))
return -EAGAIN;
return 0;
}
static int chsc_subchannel_freeze(struct subchannel *sch)
{
return cio_disable_subchannel(sch);
}
static int chsc_subchannel_restore(struct subchannel *sch)
{
return cio_enable_subchannel(sch, (u32)(unsigned long)sch);
}
static struct css_device_id chsc_subchannel_ids[] = {
{ .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, },
{ /* end of list */ },
@ -161,10 +136,6 @@ static struct css_driver chsc_subchannel_driver = {
.probe = chsc_subchannel_probe,
.remove = chsc_subchannel_remove,
.shutdown = chsc_subchannel_shutdown,
.prepare = chsc_subchannel_prepare,
.freeze = chsc_subchannel_freeze,
.thaw = chsc_subchannel_restore,
.restore = chsc_subchannel_restore,
};
static int __init chsc_init_dbfs(void)

5
drivers/s390/cio/cmf.c
View File

@ -1109,11 +1109,6 @@ static ssize_t cmb_enable_store(struct device *dev,
}
DEVICE_ATTR_RW(cmb_enable);
int ccw_set_cmf(struct ccw_device *cdev, int enable)
{
return cmbops->set(cdev, enable ? 2 : 0);
}
/**
* enable_cmf() - switch on the channel measurement for a specific device
* @cdev: The ccw device to be enabled

130
drivers/s390/cio/css.c
View File

@ -18,7 +18,6 @@
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/reboot.h>
#include <linux/suspend.h>
#include <linux/proc_fs.h>
#include <linux/genalloc.h>
#include <linux/dma-mapping.h>
@ -1044,59 +1043,6 @@ static struct notifier_block css_reboot_notifier = {
.notifier_call = css_reboot_event,
};
/*
* Since the css devices are neither on a bus nor have a class
* nor have a special device type, we cannot stop/restart channel
* path measurements via the normal suspend/resume callbacks, but have
* to use notifiers.
*/
static int css_power_event(struct notifier_block *this, unsigned long event,
void *ptr)
{
struct channel_subsystem *css;
int ret;
switch (event) {
case PM_HIBERNATION_PREPARE:
case PM_SUSPEND_PREPARE:
ret = NOTIFY_DONE;
for_each_css(css) {
mutex_lock(&css->mutex);
if (!css->cm_enabled) {
mutex_unlock(&css->mutex);
continue;
}
ret = __chsc_do_secm(css, 0);
ret = notifier_from_errno(ret);
mutex_unlock(&css->mutex);
}
break;
case PM_POST_HIBERNATION:
case PM_POST_SUSPEND:
ret = NOTIFY_DONE;
for_each_css(css) {
mutex_lock(&css->mutex);
if (!css->cm_enabled) {
mutex_unlock(&css->mutex);
continue;
}
ret = __chsc_do_secm(css, 1);
ret = notifier_from_errno(ret);
mutex_unlock(&css->mutex);
}
/* search for subchannels, which appeared during hibernation */
css_schedule_reprobe();
break;
default:
ret = NOTIFY_DONE;
}
return ret;
}
static struct notifier_block css_power_notifier = {
.notifier_call = css_power_event,
};
#define CIO_DMA_GFP (GFP_KERNEL | __GFP_ZERO)
static struct gen_pool *cio_dma_pool;
@ -1242,12 +1188,9 @@ static int __init css_bus_init(void)
ret = register_reboot_notifier(&css_reboot_notifier);
if (ret)
goto out_unregister;
ret = register_pm_notifier(&css_power_notifier);
if (ret)
goto out_unregister_rn;
ret = cio_dma_pool_init();
if (ret)
goto out_unregister_pmn;
goto out_unregister_rn;
airq_init();
css_init_done = 1;
@ -1255,8 +1198,6 @@ static int __init css_bus_init(void)
isc_register(IO_SCH_ISC);
return 0;
out_unregister_pmn:
unregister_pm_notifier(&css_power_notifier);
out_unregister_rn:
unregister_reboot_notifier(&css_reboot_notifier);
out_unregister:
@ -1456,74 +1397,6 @@ static int css_uevent(struct device *dev, struct kobj_uevent_env *env)
return ret;
}
static int css_pm_prepare(struct device *dev)
{
struct subchannel *sch = to_subchannel(dev);
struct css_driver *drv;
if (mutex_is_locked(&sch->reg_mutex))
return -EAGAIN;
if (!sch->dev.driver)
return 0;
drv = to_cssdriver(sch->dev.driver);
/* Notify drivers that they may not register children. */
return drv->prepare ? drv->prepare(sch) : 0;
}
static void css_pm_complete(struct device *dev)
{
struct subchannel *sch = to_subchannel(dev);
struct css_driver *drv;
if (!sch->dev.driver)
return;
drv = to_cssdriver(sch->dev.driver);
if (drv->complete)
drv->complete(sch);
}
static int css_pm_freeze(struct device *dev)
{
struct subchannel *sch = to_subchannel(dev);
struct css_driver *drv;
if (!sch->dev.driver)
return 0;
drv = to_cssdriver(sch->dev.driver);
return drv->freeze ? drv->freeze(sch) : 0;
}
static int css_pm_thaw(struct device *dev)
{
struct subchannel *sch = to_subchannel(dev);
struct css_driver *drv;
if (!sch->dev.driver)
return 0;
drv = to_cssdriver(sch->dev.driver);
return drv->thaw ? drv->thaw(sch) : 0;
}
static int css_pm_restore(struct device *dev)
{
struct subchannel *sch = to_subchannel(dev);
struct css_driver *drv;
css_update_ssd_info(sch);
if (!sch->dev.driver)
return 0;
drv = to_cssdriver(sch->dev.driver);
return drv->restore ? drv->restore(sch) : 0;
}
static const struct dev_pm_ops css_pm_ops = {
.prepare = css_pm_prepare,
.complete = css_pm_complete,
.freeze = css_pm_freeze,
.thaw = css_pm_thaw,
.restore = css_pm_restore,
};
static struct bus_type css_bus_type = {
.name = "css",
.match = css_bus_match,
@ -1531,7 +1404,6 @@ static struct bus_type css_bus_type = {
.remove = css_remove,
.shutdown = css_shutdown,
.uevent = css_uevent,
.pm = &css_pm_ops,
};
/**

10
drivers/s390/cio/css.h
View File

@ -72,11 +72,6 @@ struct chp_link;
* @probe: function called on probe
* @remove: function called on remove
* @shutdown: called at device shutdown
* @prepare: prepare for pm state transition
* @complete: undo work done in @prepare
* @freeze: callback for freezing during hibernation snapshotting
* @thaw: undo work done in @freeze
* @restore: callback for restoring after hibernation
* @settle: wait for asynchronous work to finish
*/
struct css_driver {
@ -88,11 +83,6 @@ struct css_driver {
int (*probe)(struct subchannel *);
int (*remove)(struct subchannel *);
void (*shutdown)(struct subchannel *);
int (*prepare) (struct subchannel *);
void (*complete) (struct subchannel *);
int (*freeze)(struct subchannel *);
int (*thaw) (struct subchannel *);
int (*restore)(struct subchannel *);
int (*settle)(void);
};

265
drivers/s390/cio/device.c
View File

@ -149,19 +149,6 @@ static struct css_device_id io_subchannel_ids[] = {
{ /* end of list */ },
};
static int io_subchannel_prepare(struct subchannel *sch)
{
struct ccw_device *cdev;
/*
* Don't allow suspend while a ccw device registration
* is still outstanding.
*/
cdev = sch_get_cdev(sch);
if (cdev && !device_is_registered(&cdev->dev))
return -EAGAIN;
return 0;
}
static int io_subchannel_settle(void)
{
int ret;
@ -186,7 +173,6 @@ static struct css_driver io_subchannel_driver = {
.probe = io_subchannel_probe,
.remove = io_subchannel_remove,
.shutdown = io_subchannel_shutdown,
.prepare = io_subchannel_prepare,
.settle = io_subchannel_settle,
};
@ -1422,7 +1408,7 @@ static enum io_sch_action sch_get_action(struct subchannel *sch)
}
if (device_is_disconnected(cdev))
return IO_SCH_REPROBE;
if (cdev->online && !cdev->private->flags.resuming)
if (cdev->online)
return IO_SCH_VERIFY;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return IO_SCH_UNREG_ATTACH;
@ -1514,11 +1500,6 @@ static int io_subchannel_sch_event(struct subchannel *sch, int process)
break;
case IO_SCH_UNREG_ATTACH:
spin_lock_irqsave(sch->lock, flags);
if (cdev->private->flags.resuming) {
/* Device will be handled later. */
rc = 0;
goto out_unlock;
}
sch_set_cdev(sch, NULL);
spin_unlock_irqrestore(sch->lock, flags);
/* Unregister ccw device. */
@ -1531,7 +1512,7 @@ static int io_subchannel_sch_event(struct subchannel *sch, int process)
switch (action) {
case IO_SCH_ORPH_UNREG:
case IO_SCH_UNREG:
if (!cdev || !cdev->private->flags.resuming)
if (!cdev)
css_sch_device_unregister(sch);
break;
case IO_SCH_ORPH_ATTACH:
@ -1664,10 +1645,10 @@ void __init ccw_device_destroy_console(struct ccw_device *cdev)
struct io_subchannel_private *io_priv = to_io_private(sch);
set_io_private(sch, NULL);
put_device(&sch->dev);
put_device(&cdev->dev);
dma_free_coherent(&sch->dev, sizeof(*io_priv->dma_area),
io_priv->dma_area, io_priv->dma_area_dma);
put_device(&sch->dev);
put_device(&cdev->dev);
kfree(io_priv);
}
@ -1690,14 +1671,6 @@ void ccw_device_wait_idle(struct ccw_device *cdev)
udelay_simple(100);
}
}
static int ccw_device_pm_restore(struct device *dev);
int ccw_device_force_console(struct ccw_device *cdev)
{
return ccw_device_pm_restore(&cdev->dev);
}
EXPORT_SYMBOL_GPL(ccw_device_force_console);
#endif
/**
@ -1798,235 +1771,6 @@ static void ccw_device_shutdown(struct device *dev)
__disable_cmf(cdev);
}
static int ccw_device_pm_prepare(struct device *dev)
{
struct ccw_device *cdev = to_ccwdev(dev);
if (work_pending(&cdev->private->todo_work))
return -EAGAIN;
/* Fail while device is being set online/offline. */
if (atomic_read(&cdev->private->onoff))
return -EAGAIN;
if (cdev->online && cdev->drv && cdev->drv->prepare)
return cdev->drv->prepare(cdev);
return 0;
}
static void ccw_device_pm_complete(struct device *dev)
{
struct ccw_device *cdev = to_ccwdev(dev);
if (cdev->online && cdev->drv && cdev->drv->complete)
cdev->drv->complete(cdev);
}
static int ccw_device_pm_freeze(struct device *dev)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct subchannel *sch = to_subchannel(cdev->dev.parent);
int ret, cm_enabled;
/* Fail suspend while device is in transistional state. */
if (!dev_fsm_final_state(cdev))
return -EAGAIN;
if (!cdev->online)
return 0;
if (cdev->drv && cdev->drv->freeze) {
ret = cdev->drv->freeze(cdev);
if (ret)
return ret;
}
spin_lock_irq(sch->lock);
cm_enabled = cdev->private->cmb != NULL;
spin_unlock_irq(sch->lock);
if (cm_enabled) {
/* Don't have the css write on memory. */
ret = ccw_set_cmf(cdev, 0);
if (ret)
return ret;
}
/* From here on, disallow device driver I/O. */
spin_lock_irq(sch->lock);
ret = cio_disable_subchannel(sch);
spin_unlock_irq(sch->lock);
return ret;
}
static int ccw_device_pm_thaw(struct device *dev)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct subchannel *sch = to_subchannel(cdev->dev.parent);
int ret, cm_enabled;
if (!cdev->online)
return 0;
spin_lock_irq(sch->lock);
/* Allow device driver I/O again. */
ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
cm_enabled = cdev->private->cmb != NULL;
spin_unlock_irq(sch->lock);
if (ret)
return ret;
if (cm_enabled) {
ret = ccw_set_cmf(cdev, 1);
if (ret)
return ret;
}
if (cdev->drv && cdev->drv->thaw)
ret = cdev->drv->thaw(cdev);
return ret;
}
static void __ccw_device_pm_restore(struct ccw_device *cdev)
{
struct subchannel *sch = to_subchannel(cdev->dev.parent);
spin_lock_irq(sch->lock);
if (cio_is_console(sch->schid)) {
cio_enable_subchannel(sch, (u32)(addr_t)sch);
goto out_unlock;
}
/*
* While we were sleeping, devices may have gone or become
* available again. Kick re-detection.
*/
cdev->private->flags.resuming = 1;
cdev->private->path_new_mask = LPM_ANYPATH;
css_sched_sch_todo(sch, SCH_TODO_EVAL);
spin_unlock_irq(sch->lock);
css_wait_for_slow_path();
/* cdev may have been moved to a different subchannel. */
sch = to_subchannel(cdev->dev.parent);
spin_lock_irq(sch->lock);
if (cdev->private->state != DEV_STATE_ONLINE &&
cdev->private->state != DEV_STATE_OFFLINE)
goto out_unlock;
ccw_device_recognition(cdev);
spin_unlock_irq(sch->lock);
wait_event(cdev->private->wait_q, dev_fsm_final_state(cdev) ||
cdev->private->state == DEV_STATE_DISCONNECTED);
spin_lock_irq(sch->lock);
out_unlock:
cdev->private->flags.resuming = 0;
spin_unlock_irq(sch->lock);
}
static int resume_handle_boxed(struct ccw_device *cdev)
{
cdev->private->state = DEV_STATE_BOXED;
if (ccw_device_notify(cdev, CIO_BOXED) == NOTIFY_OK)
return 0;
ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
return -ENODEV;
}
static int resume_handle_disc(struct ccw_device *cdev)
{
cdev->private->state = DEV_STATE_DISCONNECTED;
if (ccw_device_notify(cdev, CIO_GONE) == NOTIFY_OK)
return 0;
ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
return -ENODEV;
}
static int ccw_device_pm_restore(struct device *dev)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct subchannel *sch;
int ret = 0;
__ccw_device_pm_restore(cdev);
sch = to_subchannel(cdev->dev.parent);
spin_lock_irq(sch->lock);
if (cio_is_console(sch->schid))
goto out_restore;
/* check recognition results */
switch (cdev->private->state) {
case DEV_STATE_OFFLINE:
case DEV_STATE_ONLINE:
cdev->private->flags.donotify = 0;
break;
case DEV_STATE_BOXED:
ret = resume_handle_boxed(cdev);
if (ret)
goto out_unlock;
goto out_restore;
default:
ret = resume_handle_disc(cdev);
if (ret)
goto out_unlock;
goto out_restore;
}
/* check if the device type has changed */
if (!ccw_device_test_sense_data(cdev)) {
ccw_device_update_sense_data(cdev);
ccw_device_sched_todo(cdev, CDEV_TODO_REBIND);
ret = -ENODEV;
goto out_unlock;
}
if (!cdev->online)
goto out_unlock;
if (ccw_device_online(cdev)) {
ret = resume_handle_disc(cdev);
if (ret)
goto out_unlock;
goto out_restore;
}
spin_unlock_irq(sch->lock);
wait_event(cdev->private->wait_q, dev_fsm_final_state(cdev));
spin_lock_irq(sch->lock);
if (ccw_device_notify(cdev, CIO_OPER) == NOTIFY_BAD) {
ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
ret = -ENODEV;
goto out_unlock;
}
/* reenable cmf, if needed */
if (cdev->private->cmb) {
spin_unlock_irq(sch->lock);
ret = ccw_set_cmf(cdev, 1);
spin_lock_irq(sch->lock);
if (ret) {
CIO_MSG_EVENT(2, "resume: cdev 0.%x.%04x: cmf failed "
"(rc=%d)\n", cdev->private->dev_id.ssid,
cdev->private->dev_id.devno, ret);
ret = 0;
}
}
out_restore:
spin_unlock_irq(sch->lock);
if (cdev->online && cdev->drv && cdev->drv->restore)
ret = cdev->drv->restore(cdev);
return ret;
out_unlock:
spin_unlock_irq(sch->lock);
return ret;
}
static const struct dev_pm_ops ccw_pm_ops = {
.prepare = ccw_device_pm_prepare,
.complete = ccw_device_pm_complete,
.freeze = ccw_device_pm_freeze,
.thaw = ccw_device_pm_thaw,
.restore = ccw_device_pm_restore,
};
static struct bus_type ccw_bus_type = {
.name = "ccw",
.match = ccw_bus_match,
@ -2034,7 +1778,6 @@ static struct bus_type ccw_bus_type = {
.probe = ccw_device_probe,
.remove = ccw_device_remove,
.shutdown = ccw_device_shutdown,
.pm = &ccw_pm_ops,
};
/**

1
drivers/s390/cio/device.h
View File

@ -143,6 +143,5 @@ void retry_set_schib(struct ccw_device *cdev);
void cmf_retry_copy_block(struct ccw_device *);
int cmf_reenable(struct ccw_device *);
void cmf_reactivate(void);
int ccw_set_cmf(struct ccw_device *cdev, int enable);
extern struct device_attribute dev_attr_cmb_enable;
#endif

6
drivers/s390/cio/device_fsm.c
View File

@ -224,12 +224,6 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
wake_up(&cdev->private->wait_q);
return;
}
if (cdev->private->flags.resuming) {
cdev->private->state = state;
cdev->private->flags.recog_done = 1;
wake_up(&cdev->private->wait_q);
return;
}
switch (state) {
case DEV_STATE_NOT_OPER:
break;

13
drivers/s390/cio/eadm_sch.c
View File

@ -306,16 +306,6 @@ static void eadm_subchannel_shutdown(struct subchannel *sch)
eadm_quiesce(sch);
}
static int eadm_subchannel_freeze(struct subchannel *sch)
{
return cio_disable_subchannel(sch);
}
static int eadm_subchannel_restore(struct subchannel *sch)
{
return cio_enable_subchannel(sch, (u32)(unsigned long)sch);
}
/**
* eadm_subchannel_sch_event - process subchannel event
* @sch: subchannel
@ -369,9 +359,6 @@ static struct css_driver eadm_subchannel_driver = {
.remove = eadm_subchannel_remove,
.shutdown = eadm_subchannel_shutdown,
.sch_event = eadm_subchannel_sch_event,
.freeze = eadm_subchannel_freeze,
.thaw = eadm_subchannel_restore,
.restore = eadm_subchannel_restore,
};
static int __init eadm_sch_init(void)

1
drivers/s390/cio/io_sch.h
View File

@ -160,7 +160,6 @@ struct ccw_device_private {
unsigned int donotify:1; /* call notify function */
unsigned int recog_done:1; /* dev. recog. complete */
unsigned int fake_irb:2; /* deliver faked irb */
unsigned int resuming:1; /* recognition while resume */
unsigned int pgroup:1; /* pathgroup is set up */
unsigned int mpath:1; /* multipathing is set up */
unsigned int pgid_unknown:1;/* unknown pgid state */

213
drivers/s390/crypto/ap_bus.c
View File

@ -1,11 +1,12 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright IBM Corp. 2006, 2012
* Copyright IBM Corp. 2006, 2020
* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Ralph Wuerthner <rwuerthn@de.ibm.com>
* Felix Beck <felix.beck@de.ibm.com>
* Holger Dengler <hd@linux.vnet.ibm.com>
* Harald Freudenberger <freude@linux.ibm.com>
*
* Adjunct processor bus.
*/
@ -73,6 +74,12 @@ EXPORT_SYMBOL(ap_perms);
DEFINE_MUTEX(ap_perms_mutex);
EXPORT_SYMBOL(ap_perms_mutex);
/* # of bus scans since init */
static atomic64_t ap_scan_bus_count;
/* completion for initial APQN bindings complete */
static DECLARE_COMPLETION(ap_init_apqn_bindings_complete);
static struct ap_config_info *ap_qci_info;
/*
@ -577,23 +584,125 @@ static int ap_bus_match(struct device *dev, struct device_driver *drv)
*/
static int ap_uevent(struct device *dev, struct kobj_uevent_env *env)
{
int rc;
struct ap_device *ap_dev = to_ap_dev(dev);
int retval = 0;
if (!ap_dev)
return -ENODEV;
/* Uevents from ap bus core don't need extensions to the env */
if (dev == ap_root_device)
return 0;
/* Set up DEV_TYPE environment variable. */
retval = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type);
if (retval)
return retval;
rc = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type);
if (rc)
return rc;
/* Add MODALIAS= */
retval = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type);
rc = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type);
if (rc)
return rc;
return retval;
return 0;
}
static void ap_send_init_scan_done_uevent(void)
{
char *envp[] = { "INITSCAN=done", NULL };
kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp);
}
static void ap_send_bindings_complete_uevent(void)
{
char *envp[] = { "BINDINGS=complete", NULL };
kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp);
}
/*
* calc # of bound APQNs
*/
struct __ap_calc_ctrs {
unsigned int apqns;
unsigned int bound;
};
static int __ap_calc_helper(struct device *dev, void *arg)
{
struct __ap_calc_ctrs *pctrs = (struct __ap_calc_ctrs *) arg;
if (is_queue_dev(dev)) {
pctrs->apqns++;
if ((to_ap_dev(dev))->drv)
pctrs->bound++;
}
return 0;
}
static void ap_calc_bound_apqns(unsigned int *apqns, unsigned int *bound)
{
struct __ap_calc_ctrs ctrs;
memset(&ctrs, 0, sizeof(ctrs));
bus_for_each_dev(&ap_bus_type, NULL, (void *) &ctrs, __ap_calc_helper);
*apqns = ctrs.apqns;
*bound = ctrs.bound;
}
/*
* After initial ap bus scan do check if all existing APQNs are
* bound to device drivers.
*/
static void ap_check_bindings_complete(void)
{
unsigned int apqns, bound;
if (atomic64_read(&ap_scan_bus_count) >= 1) {
ap_calc_bound_apqns(&apqns, &bound);
if (bound == apqns) {
if (!completion_done(&ap_init_apqn_bindings_complete)) {
complete_all(&ap_init_apqn_bindings_complete);
AP_DBF(DBF_INFO, "%s complete\n", __func__);
}
ap_send_bindings_complete_uevent();
}
}
}
/*
* Interface to wait for the AP bus to have done one initial ap bus
* scan and all detected APQNs have been bound to device drivers.
* If these both conditions are not fulfilled, this function blocks
* on a condition with wait_for_completion_interruptible_timeout().
* If these both conditions are fulfilled (before the timeout hits)
* the return value is 0. If the timeout (in jiffies) hits instead
* -ETIME is returned. On failures negative return values are
* returned to the caller.
*/
int ap_wait_init_apqn_bindings_complete(unsigned long timeout)
{
long l;
if (completion_done(&ap_init_apqn_bindings_complete))
return 0;
if (timeout)
l = wait_for_completion_interruptible_timeout(
&ap_init_apqn_bindings_complete, timeout);
else
l = wait_for_completion_interruptible(
&ap_init_apqn_bindings_complete);
if (l < 0)
return l == -ERESTARTSYS ? -EINTR : l;
else if (l == 0 && timeout)
return -ETIME;
return 0;
}
EXPORT_SYMBOL(ap_wait_init_apqn_bindings_complete);
static int __ap_queue_devices_with_id_unregister(struct device *dev, void *data)
{
if (is_queue_dev(dev) &&
@ -602,12 +711,6 @@ static int __ap_queue_devices_with_id_unregister(struct device *dev, void *data)
return 0;
}
static struct bus_type ap_bus_type = {
.name = "ap",
.match = &ap_bus_match,
.uevent = &ap_uevent,
};
static int __ap_revise_reserved(struct device *dev, void *dummy)
{
int rc, card, queue, devres, drvres;
@ -719,7 +822,8 @@ static int ap_device_probe(struct device *dev)
hash_del(&to_ap_queue(dev)->hnode);
spin_unlock_bh(&ap_queues_lock);
ap_dev->drv = NULL;
}
} else
ap_check_bindings_complete();
out:
if (rc)
@ -749,6 +853,7 @@ static int ap_device_remove(struct device *dev)
if (is_queue_dev(dev))
hash_del(&to_ap_queue(dev)->hnode);
spin_unlock_bh(&ap_queues_lock);
ap_dev->drv = NULL;
put_device(dev);
@ -1166,21 +1271,55 @@ static ssize_t aqmask_store(struct bus_type *bus, const char *buf,
static BUS_ATTR_RW(aqmask);
static struct bus_attribute *const ap_bus_attrs[] = {
&bus_attr_ap_domain,
&bus_attr_ap_control_domain_mask,
&bus_attr_ap_usage_domain_mask,
&bus_attr_ap_adapter_mask,
&bus_attr_config_time,
&bus_attr_poll_thread,
&bus_attr_ap_interrupts,
&bus_attr_poll_timeout,
&bus_attr_ap_max_domain_id,
&bus_attr_ap_max_adapter_id,
&bus_attr_apmask,
&bus_attr_aqmask,
static ssize_t scans_show(struct bus_type *bus, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%llu\n",
atomic64_read(&ap_scan_bus_count));
}
static BUS_ATTR_RO(scans);
static ssize_t bindings_show(struct bus_type *bus, char *buf)
{
int rc;
unsigned int apqns, n;
ap_calc_bound_apqns(&apqns, &n);
if (atomic64_read(&ap_scan_bus_count) >= 1 && n == apqns)
rc = scnprintf(buf, PAGE_SIZE, "%u/%u (complete)\n", n, apqns);
else
rc = scnprintf(buf, PAGE_SIZE, "%u/%u\n", n, apqns);
return rc;
}
static BUS_ATTR_RO(bindings);
static struct attribute *ap_bus_attrs[] = {
&bus_attr_ap_domain.attr,
&bus_attr_ap_control_domain_mask.attr,
&bus_attr_ap_usage_domain_mask.attr,
&bus_attr_ap_adapter_mask.attr,
&bus_attr_config_time.attr,
&bus_attr_poll_thread.attr,
&bus_attr_ap_interrupts.attr,
&bus_attr_poll_timeout.attr,
&bus_attr_ap_max_domain_id.attr,
&bus_attr_ap_max_adapter_id.attr,
&bus_attr_apmask.attr,
&bus_attr_aqmask.attr,
&bus_attr_scans.attr,
&bus_attr_bindings.attr,
NULL,
};
ATTRIBUTE_GROUPS(ap_bus);
static struct bus_type ap_bus_type = {
.name = "ap",
.bus_groups = ap_bus_groups,
.match = &ap_bus_match,
.uevent = &ap_uevent,
};
/**
* ap_select_domain(): Select an AP domain if possible and we haven't
@ -1608,6 +1747,12 @@ static void ap_scan_bus(struct work_struct *unused)
ap_domain_index);
}
if (atomic64_inc_return(&ap_scan_bus_count) == 1) {
AP_DBF(DBF_DEBUG, "%s init scan complete\n", __func__);
ap_send_init_scan_done_uevent();
ap_check_bindings_complete();
}
mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ);
}
@ -1655,7 +1800,7 @@ static void __init ap_perms_init(void)
*/
static int __init ap_module_init(void)
{
int rc, i;
int rc;
rc = ap_debug_init();
if (rc)
@ -1694,17 +1839,13 @@ static int __init ap_module_init(void)
rc = bus_register(&ap_bus_type);
if (rc)
goto out;
for (i = 0; ap_bus_attrs[i]; i++) {
rc = bus_create_file(&ap_bus_type, ap_bus_attrs[i]);
if (rc)
goto out_bus;
}
/* Create /sys/devices/ap. */
ap_root_device = root_device_register("ap");
rc = PTR_ERR_OR_ZERO(ap_root_device);
if (rc)
goto out_bus;
ap_root_device->bus = &ap_bus_type;
/* Setup the AP bus rescan timer. */
timer_setup(&ap_config_timer, ap_config_timeout, 0);
@ -1733,8 +1874,6 @@ out_work:
hrtimer_cancel(&ap_poll_timer);
root_device_unregister(ap_root_device);
out_bus:
while (i--)
bus_remove_file(&ap_bus_type, ap_bus_attrs[i]);
bus_unregister(&ap_bus_type);
out:
if (ap_using_interrupts())

12
drivers/s390/crypto/ap_bus.h
View File

@ -350,4 +350,16 @@ int ap_parse_mask_str(const char *str,
unsigned long *bitmap, int bits,
struct mutex *lock);
/*
* Interface to wait for the AP bus to have done one initial ap bus
* scan and all detected APQNs have been bound to device drivers.
* If these both conditions are not fulfilled, this function blocks
* on a condition with wait_for_completion_killable_timeout().
* If these both conditions are fulfilled (before the timeout hits)
* the return value is 0. If the timeout (in jiffies) hits instead
* -ETIME is returned. On failures negative return values are
* returned to the caller.
*/
int ap_wait_init_apqn_bindings_complete(unsigned long timeout);
#endif /* _AP_BUS_H_ */

15
drivers/s390/crypto/pkey_api.c
View File

@ -150,6 +150,8 @@ static int pkey_skey2pkey(const u8 *key, struct pkey_protkey *pkey)
u16 cardnr, domain;
struct keytoken_header *hdr = (struct keytoken_header *)key;
zcrypt_wait_api_operational();
/*
* The cca_xxx2protkey call may fail when a card has been
* addressed where the master key was changed after last fetch
@ -197,6 +199,8 @@ static int pkey_clr2ep11key(const u8 *clrkey, size_t clrkeylen,
u16 card, dom;
u32 nr_apqns, *apqns = NULL;
zcrypt_wait_api_operational();
/* build a list of apqns suitable for ep11 keys with cpacf support */
rc = ep11_findcard2(&apqns, &nr_apqns, 0xFFFF, 0xFFFF,
ZCRYPT_CEX7, EP11_API_V, NULL);
@ -230,6 +234,8 @@ static int pkey_ep11key2pkey(const u8 *key, struct pkey_protkey *pkey)
u32 nr_apqns, *apqns = NULL;
struct ep11keyblob *kb = (struct ep11keyblob *) key;
zcrypt_wait_api_operational();
/* build a list of apqns suitable for this key */
rc = ep11_findcard2(&apqns, &nr_apqns, 0xFFFF, 0xFFFF,
ZCRYPT_CEX7, EP11_API_V, kb->wkvp);
@ -436,6 +442,7 @@ static int pkey_nonccatok2pkey(const u8 *key, u32 keylen,
if (rc == 0)
break;
/* PCKMO failed, so try the CCA secure key way */
zcrypt_wait_api_operational();
rc = cca_clr2seckey(0xFFFF, 0xFFFF, t->keytype,
ckey.clrkey, tmpbuf);
if (rc == 0)
@ -625,6 +632,8 @@ static int pkey_clr2seckey2(const struct pkey_apqn *apqns, size_t nr_apqns,
return -EINVAL;
}
zcrypt_wait_api_operational();
/* simple try all apqns from the list */
for (i = 0, rc = -ENODEV; i < nr_apqns; i++) {
card = apqns[i].card;
@ -801,6 +810,8 @@ static int pkey_keyblob2pkey2(const struct pkey_apqn *apqns, size_t nr_apqns,
return -EINVAL;
}
zcrypt_wait_api_operational();
/* simple try all apqns from the list */
for (i = 0, rc = -ENODEV; i < nr_apqns; i++) {
card = apqns[i].card;
@ -838,6 +849,8 @@ static int pkey_apqns4key(const u8 *key, size_t keylen, u32 flags,
if (keylen < sizeof(struct keytoken_header) || flags == 0)
return -EINVAL;
zcrypt_wait_api_operational();
if (hdr->type == TOKTYPE_NON_CCA
&& (hdr->version == TOKVER_EP11_AES_WITH_HEADER
|| hdr->version == TOKVER_EP11_ECC_WITH_HEADER)
@ -941,6 +954,8 @@ static int pkey_apqns4keytype(enum pkey_key_type ktype,
int rc;
u32 _nr_apqns, *_apqns = NULL;
zcrypt_wait_api_operational();
if (ktype == PKEY_TYPE_CCA_DATA || ktype == PKEY_TYPE_CCA_CIPHER) {
u64 cur_mkvp = 0, old_mkvp = 0;
int minhwtype = ZCRYPT_CEX3C;

66
drivers/s390/crypto/zcrypt_api.c
View File

@ -1992,6 +1992,72 @@ void zcrypt_rng_device_remove(void)
mutex_unlock(&zcrypt_rng_mutex);
}
/*
* Wait until the zcrypt api is operational.
* The AP bus scan and the binding of ap devices to device drivers is
* an asynchronous job. This function waits until these initial jobs
* are done and so the zcrypt api should be ready to serve crypto
* requests - if there are resources available. The function uses an
* internal timeout of 60s. The very first caller will either wait for
* ap bus bindings complete or the timeout happens. This state will be
* remembered for further callers which will only be blocked until a
* decision is made (timeout or bindings complete).
* On timeout -ETIME is returned, on success the return value is 0.
*/
int zcrypt_wait_api_operational(void)
{
static DEFINE_MUTEX(zcrypt_wait_api_lock);
static int zcrypt_wait_api_state;
int rc;
rc = mutex_lock_interruptible(&zcrypt_wait_api_lock);
if (rc)
return rc;
switch (zcrypt_wait_api_state) {
case 0:
/* initial state, invoke wait for the ap bus complete */
rc = ap_wait_init_apqn_bindings_complete(
msecs_to_jiffies(60 * 1000));
switch (rc) {
case 0:
/* ap bus bindings are complete */
zcrypt_wait_api_state = 1;
break;
case -EINTR:
/* interrupted, go back to caller */
break;
case -ETIME:
/* timeout */
ZCRYPT_DBF(DBF_WARN,
"%s ap_wait_init_apqn_bindings_complete() returned with ETIME\n",
__func__);
zcrypt_wait_api_state = -ETIME;
break;
default:
/* other failure */
ZCRYPT_DBF(DBF_DEBUG,
"%s ap_wait_init_apqn_bindings_complete() failure rc=%d\n",
__func__, rc);
break;
}
break;
case 1:
/* a previous caller already found ap bus bindings complete */
rc = 0;
break;
default:
/* a previous caller had timeout or other failure */
rc = zcrypt_wait_api_state;
break;
}
mutex_unlock(&zcrypt_wait_api_lock);
return rc;
}
EXPORT_SYMBOL(zcrypt_wait_api_operational);
int __init zcrypt_debug_init(void)
{
zcrypt_dbf_info = debug_register("zcrypt", 1, 1,

2
drivers/s390/crypto/zcrypt_api.h
View File

@ -162,6 +162,8 @@ void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus);
int zcrypt_device_status_ext(int card, int queue,
struct zcrypt_device_status_ext *devstatus);
int zcrypt_wait_api_operational(void);
static inline unsigned long z_copy_from_user(bool userspace,
void *to,
const void __user *from,

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