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more s390 updates for 5.17 merge window

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- add Sven Schnelle as reviewer for s390 code
 
 - make uaccess code more readable
 
 - change cpu measurement facility code to also support counter second
   version number 7, and add discard support for limited samples
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Merge tag 's390-5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull more s390 updates from Heiko Carstens:

 - add Sven Schnelle as reviewer for s390 code

 - make uaccess code more readable

 - change cpu measurement facility code to also support counter second
   version number 7, and add discard support for limited samples

* tag 's390-5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: add Sven Schnelle as reviewer
  s390/uaccess: introduce bit field for OAC specifier
  s390/cpumf: Support for CPU Measurement Sampling Facility LS bit
  s390/cpumf: Support for CPU Measurement Facility CSVN 7
This commit is contained in:
Linus Torvalds 2022-01-21 08:57:15 +02:00
commit 85e67d56eb
7 changed files with 105 additions and 56 deletions
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1
MAINTAINERS
View File

@ -16807,6 +16807,7 @@ M: Heiko Carstens <hca@linux.ibm.com>
M: Vasily Gorbik <gor@linux.ibm.com> M: Vasily Gorbik <gor@linux.ibm.com>
M: Christian Borntraeger <borntraeger@linux.ibm.com> M: Christian Borntraeger <borntraeger@linux.ibm.com>
R: Alexander Gordeev <agordeev@linux.ibm.com> R: Alexander Gordeev <agordeev@linux.ibm.com>
R: Sven Schnelle <svens@linux.ibm.com>
L: linux-s390@vger.kernel.org L: linux-s390@vger.kernel.org
S: Supported S: Supported
W: http://www.ibm.com/developerworks/linux/linux390/ W: http://www.ibm.com/developerworks/linux/linux390/

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

@ -109,7 +109,9 @@ struct hws_basic_entry {
unsigned int AS:2; /* 29-30 PSW address-space control */ unsigned int AS:2; /* 29-30 PSW address-space control */
unsigned int I:1; /* 31 entry valid or invalid */ unsigned int I:1; /* 31 entry valid or invalid */
unsigned int CL:2; /* 32-33 Configuration Level */ unsigned int CL:2; /* 32-33 Configuration Level */
unsigned int:14; unsigned int H:1; /* 34 Host Indicator */
unsigned int LS:1; /* 35 Limited Sampling */
unsigned int:12;
unsigned int prim_asn:16; /* primary ASN */ unsigned int prim_asn:16; /* primary ASN */
unsigned long long ia; /* Instruction Address */ unsigned long long ia; /* Instruction Address */
unsigned long long gpp; /* Guest Program Parameter */ unsigned long long gpp; /* Guest Program Parameter */

72
arch/s390/include/asm/uaccess.h
View File

@ -49,12 +49,34 @@ int __get_user_bad(void) __attribute__((noreturn));
#ifdef CONFIG_HAVE_MARCH_Z10_FEATURES #ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
#define __put_get_user_asm(to, from, size, insn) \ union oac {
unsigned int val;
struct {
struct {
unsigned short key : 4;
unsigned short : 4;
unsigned short as : 2;
unsigned short : 4;
unsigned short k : 1;
unsigned short a : 1;
} oac1;
struct {
unsigned short key : 4;
unsigned short : 4;
unsigned short as : 2;
unsigned short : 4;
unsigned short k : 1;
unsigned short a : 1;
} oac2;
};
};
#define __put_get_user_asm(to, from, size, oac_spec) \
({ \ ({ \
int __rc; \ int __rc; \
\ \
asm volatile( \ asm volatile( \
insn " 0,%[spec]\n" \ " lr 0,%[spec]\n" \
"0: mvcos %[_to],%[_from],%[_size]\n" \ "0: mvcos %[_to],%[_from],%[_size]\n" \
"1: xr %[rc],%[rc]\n" \ "1: xr %[rc],%[rc]\n" \
"2:\n" \ "2:\n" \
@ -65,35 +87,47 @@ int __get_user_bad(void) __attribute__((noreturn));
EX_TABLE(0b,3b) EX_TABLE(1b,3b) \ EX_TABLE(0b,3b) EX_TABLE(1b,3b) \
: [rc] "=&d" (__rc), [_to] "+Q" (*(to)) \ : [rc] "=&d" (__rc), [_to] "+Q" (*(to)) \
: [_size] "d" (size), [_from] "Q" (*(from)), \ : [_size] "d" (size), [_from] "Q" (*(from)), \
[retval] "K" (-EFAULT), [spec] "K" (0x81UL) \ [retval] "K" (-EFAULT), [spec] "d" (oac_spec.val) \
: "cc", "0"); \ : "cc", "0"); \
__rc; \ __rc; \
}) })
#define __put_user_asm(to, from, size) \
__put_get_user_asm(to, from, size, ((union oac) { \
.oac1.as = PSW_BITS_AS_SECONDARY, \
.oac1.a = 1 \
}))
#define __get_user_asm(to, from, size) \
__put_get_user_asm(to, from, size, ((union oac) { \
.oac2.as = PSW_BITS_AS_SECONDARY, \
.oac2.a = 1 \
})) \
static __always_inline int __put_user_fn(void *x, void __user *ptr, unsigned long size) static __always_inline int __put_user_fn(void *x, void __user *ptr, unsigned long size)
{ {
int rc; int rc;
switch (size) { switch (size) {
case 1: case 1:
rc = __put_get_user_asm((unsigned char __user *)ptr, rc = __put_user_asm((unsigned char __user *)ptr,
(unsigned char *)x, (unsigned char *)x,
size, "llilh"); size);
break; break;
case 2: case 2:
rc = __put_get_user_asm((unsigned short __user *)ptr, rc = __put_user_asm((unsigned short __user *)ptr,
(unsigned short *)x, (unsigned short *)x,
size, "llilh"); size);
break; break;
case 4: case 4:
rc = __put_get_user_asm((unsigned int __user *)ptr, rc = __put_user_asm((unsigned int __user *)ptr,
(unsigned int *)x, (unsigned int *)x,
size, "llilh"); size);
break; break;
case 8: case 8:
rc = __put_get_user_asm((unsigned long __user *)ptr, rc = __put_user_asm((unsigned long __user *)ptr,
(unsigned long *)x, (unsigned long *)x,
size, "llilh"); size);
break; break;
default: default:
__put_user_bad(); __put_user_bad();
@ -108,24 +142,24 @@ static __always_inline int __get_user_fn(void *x, const void __user *ptr, unsign
switch (size) { switch (size) {
case 1: case 1:
rc = __put_get_user_asm((unsigned char *)x, rc = __get_user_asm((unsigned char *)x,
(unsigned char __user *)ptr, (unsigned char __user *)ptr,
size, "lghi"); size);
break; break;
case 2: case 2:
rc = __put_get_user_asm((unsigned short *)x, rc = __get_user_asm((unsigned short *)x,
(unsigned short __user *)ptr, (unsigned short __user *)ptr,
size, "lghi"); size);
break; break;
case 4: case 4:
rc = __put_get_user_asm((unsigned int *)x, rc = __get_user_asm((unsigned int *)x,
(unsigned int __user *)ptr, (unsigned int __user *)ptr,
size, "lghi"); size);
break; break;
case 8: case 8:
rc = __put_get_user_asm((unsigned long *)x, rc = __get_user_asm((unsigned long *)x,
(unsigned long __user *)ptr, (unsigned long __user *)ptr,
size, "lghi"); size);
break; break;
default: default:
__get_user_bad(); __get_user_bad();

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

@ -178,7 +178,7 @@ size_t cpum_cf_ctrset_size(enum cpumf_ctr_set ctrset,
case CPUMF_CTR_SET_CRYPTO: case CPUMF_CTR_SET_CRYPTO:
if (info->csvn >= 1 && info->csvn <= 5) if (info->csvn >= 1 && info->csvn <= 5)
ctrset_size = 16; ctrset_size = 16;
else if (info->csvn == 6) else if (info->csvn == 6 || info->csvn == 7)
ctrset_size = 20; ctrset_size = 20;
break; break;
case CPUMF_CTR_SET_EXT: case CPUMF_CTR_SET_EXT:
@ -188,7 +188,7 @@ size_t cpum_cf_ctrset_size(enum cpumf_ctr_set ctrset,
ctrset_size = 48; ctrset_size = 48;
else if (info->csvn >= 3 && info->csvn <= 5) else if (info->csvn >= 3 && info->csvn <= 5)
ctrset_size = 128; ctrset_size = 128;
else if (info->csvn == 6) else if (info->csvn == 6 || info->csvn == 7)
ctrset_size = 160; ctrset_size = 160;
break; break;
case CPUMF_CTR_SET_MT_DIAG: case CPUMF_CTR_SET_MT_DIAG:

6
arch/s390/kernel/perf_cpum_cf_events.c
View File

@ -344,7 +344,7 @@ static struct attribute *cpumcf_svn_12345_pmu_event_attr[] __initdata = {
NULL, NULL,
}; };
static struct attribute *cpumcf_svn_6_pmu_event_attr[] __initdata = { static struct attribute *cpumcf_svn_67_pmu_event_attr[] __initdata = {
CPUMF_EVENT_PTR(cf_svn_12345, PRNG_FUNCTIONS), CPUMF_EVENT_PTR(cf_svn_12345, PRNG_FUNCTIONS),
CPUMF_EVENT_PTR(cf_svn_12345, PRNG_CYCLES), CPUMF_EVENT_PTR(cf_svn_12345, PRNG_CYCLES),
CPUMF_EVENT_PTR(cf_svn_12345, PRNG_BLOCKED_FUNCTIONS), CPUMF_EVENT_PTR(cf_svn_12345, PRNG_BLOCKED_FUNCTIONS),
@ -715,8 +715,8 @@ __init const struct attribute_group **cpumf_cf_event_group(void)
case 1 ... 5: case 1 ... 5:
csvn = cpumcf_svn_12345_pmu_event_attr; csvn = cpumcf_svn_12345_pmu_event_attr;
break; break;
case 6: case 6 ... 7:
csvn = cpumcf_svn_6_pmu_event_attr; csvn = cpumcf_svn_67_pmu_event_attr;
break; break;
default: default:
csvn = none; csvn = none;

2
arch/s390/kernel/perf_cpum_sf.c
View File

@ -1179,7 +1179,7 @@ static void hw_collect_samples(struct perf_event *event, unsigned long *sdbt,
sample = (struct hws_basic_entry *) *sdbt; sample = (struct hws_basic_entry *) *sdbt;
while ((unsigned long *) sample < (unsigned long *) te) { while ((unsigned long *) sample < (unsigned long *) te) {
/* Check for an empty sample */ /* Check for an empty sample */
if (!sample->def) if (!sample->def || sample->LS)
break; break;
/* Update perf event period */ /* Update perf event period */

24
arch/s390/lib/uaccess.c
View File

@ -62,10 +62,14 @@ static inline unsigned long copy_from_user_mvcos(void *x, const void __user *ptr
unsigned long size) unsigned long size)
{ {
unsigned long tmp1, tmp2; unsigned long tmp1, tmp2;
union oac spec = {
.oac2.as = PSW_BITS_AS_SECONDARY,
.oac2.a = 1,
};
tmp1 = -4096UL; tmp1 = -4096UL;
asm volatile( asm volatile(
" lghi 0,%[spec]\n" " lr 0,%[spec]\n"
"0: .insn ss,0xc80000000000,0(%0,%2),0(%1),0\n" "0: .insn ss,0xc80000000000,0(%0,%2),0(%1),0\n"
"6: jz 4f\n" "6: jz 4f\n"
"1: algr %0,%3\n" "1: algr %0,%3\n"
@ -84,7 +88,7 @@ static inline unsigned long copy_from_user_mvcos(void *x, const void __user *ptr
"5:\n" "5:\n"
EX_TABLE(0b,2b) EX_TABLE(3b,5b) EX_TABLE(6b,2b) EX_TABLE(7b,5b) EX_TABLE(0b,2b) EX_TABLE(3b,5b) EX_TABLE(6b,2b) EX_TABLE(7b,5b)
: "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2) : "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2)
: [spec] "K" (0x81UL) : [spec] "d" (spec.val)
: "cc", "memory", "0"); : "cc", "memory", "0");
return size; return size;
} }
@ -135,10 +139,14 @@ static inline unsigned long copy_to_user_mvcos(void __user *ptr, const void *x,
unsigned long size) unsigned long size)
{ {
unsigned long tmp1, tmp2; unsigned long tmp1, tmp2;
union oac spec = {
.oac1.as = PSW_BITS_AS_SECONDARY,
.oac1.a = 1,
};
tmp1 = -4096UL; tmp1 = -4096UL;
asm volatile( asm volatile(
" llilh 0,%[spec]\n" " lr 0,%[spec]\n"
"0: .insn ss,0xc80000000000,0(%0,%1),0(%2),0\n" "0: .insn ss,0xc80000000000,0(%0,%1),0(%2),0\n"
"6: jz 4f\n" "6: jz 4f\n"
"1: algr %0,%3\n" "1: algr %0,%3\n"
@ -157,7 +165,7 @@ static inline unsigned long copy_to_user_mvcos(void __user *ptr, const void *x,
"5:\n" "5:\n"
EX_TABLE(0b,2b) EX_TABLE(3b,5b) EX_TABLE(6b,2b) EX_TABLE(7b,5b) EX_TABLE(0b,2b) EX_TABLE(3b,5b) EX_TABLE(6b,2b) EX_TABLE(7b,5b)
: "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2) : "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2)
: [spec] "K" (0x81UL) : [spec] "d" (spec.val)
: "cc", "memory", "0"); : "cc", "memory", "0");
return size; return size;
} }
@ -207,10 +215,14 @@ EXPORT_SYMBOL(raw_copy_to_user);
static inline unsigned long clear_user_mvcos(void __user *to, unsigned long size) static inline unsigned long clear_user_mvcos(void __user *to, unsigned long size)
{ {
unsigned long tmp1, tmp2; unsigned long tmp1, tmp2;
union oac spec = {
.oac1.as = PSW_BITS_AS_SECONDARY,
.oac1.a = 1,
};
tmp1 = -4096UL; tmp1 = -4096UL;
asm volatile( asm volatile(
" llilh 0,%[spec]\n" " lr 0,%[spec]\n"
"0: .insn ss,0xc80000000000,0(%0,%1),0(%4),0\n" "0: .insn ss,0xc80000000000,0(%0,%1),0(%4),0\n"
" jz 4f\n" " jz 4f\n"
"1: algr %0,%2\n" "1: algr %0,%2\n"
@ -228,7 +240,7 @@ static inline unsigned long clear_user_mvcos(void __user *to, unsigned long size
"5:\n" "5:\n"
EX_TABLE(0b,2b) EX_TABLE(3b,5b) EX_TABLE(0b,2b) EX_TABLE(3b,5b)
: "+a" (size), "+a" (to), "+a" (tmp1), "=a" (tmp2) : "+a" (size), "+a" (to), "+a" (tmp1), "=a" (tmp2)
: "a" (empty_zero_page), [spec] "K" (0x81UL) : "a" (empty_zero_page), [spec] "d" (spec.val)
: "cc", "memory", "0"); : "cc", "memory", "0");
return size; return size;
} }