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6e914ee629
linux/arch/powerpc/kernel
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Michael Ellerman 6e914ee629 powerpc: Fix faults caused by radix patching of SLB miss handler 
As part of the Radix MMU support we added some feature sections in the
SLB miss handler. These are intended to catch the case that we
incorrectly take an SLB miss when Radix is enabled, and instead of
crashing weirdly they bail out to a well defined exit path and trigger
an oops.

However the way they were written meant the bailout case was enabled by
default until we did CPU feature patching.

On powermacs the early debug prints in setup_system() can cause an SLB
miss, which happens before code patching, and so the SLB miss handler
would incorrectly bailout and crash during boot.

Fix it by inverting the sense of the feature section, so that the code
which is in place at boot is correct for the hash case. Once we
determine we are using Radix - which will never happen on a powermac -
only then do we patch in the bailout case which unconditionally jumps.

Fixes: caca285e5a ("powerpc/mm/radix: Use STD_MMU_64 to properly isolate hash related code")
Reported-by: Denis Kirjanov <kda@linux-powerpc.org>
Tested-by: Denis Kirjanov <kda@linux-powerpc.org>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-06-23 09:58:17 +10:00
..
vdso32 powerpc: enable UBSAN support 2016-01-20 17:09:18 -08:00
vdso64 powerpc: enable UBSAN support 2016-01-20 17:09:18 -08:00
.gitignore
align.c powerpc: Create disable_kernel_{fp,altivec,vsx,spe}() 2015-12-01 13:52:25 +11:00
asm-offsets.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching 2016-05-17 17:11:27 -07:00
audit.c
btext.c powerpc/mm: Use a helper for finding pte bits mapping I/O area 2016-05-01 18:32:32 +10:00
cacheinfo.c powerpc: Fix missing L2 cache size in /sys/devices/system/cpu 2015-04-11 20:49:28 +10:00
cacheinfo.h
compat_audit.c
cpu_setup_6xx.S
cpu_setup_44x.S
cpu_setup_fsl_booke.S powerpc/cache: add cache flush operation for various e500 2016-03-04 23:44:51 -06:00
cpu_setup_pa6t.S
cpu_setup_power.S powerpc/mm: Move hash related mmu-*.h headers to book3s/ 2016-03-03 21:19:21 +11:00
cpu_setup_ppc970.S
cputable.c powerpc: Remove unused remnants from A2 cpu 2016-05-11 21:54:00 +10:00
crash_dump.c powerpc: Remove superfluous bootmem includes 2014-11-10 09:59:26 +11:00
crash.c powerpc/book3e/kdump: Enable crash_kexec_wait_realmode 2015-10-27 18:13:27 -05:00
dbell.c powerpc/powernv: Fixes for hypervisor doorbell handling 2015-03-20 14:51:53 +11:00
dma-iommu.c powerpc/iommu: Support "hybrid" iommu/direct DMA ops for coherent_mask < dma_mask 2015-07-13 10:10:55 +10:00
dma-swiotlb.c powerpc/iommu: Support "hybrid" iommu/direct DMA ops for coherent_mask < dma_mask 2015-07-13 10:10:55 +10:00
dma.c powerpc/dma: dma_set_coherent_mask() should not be GPL only 2015-10-28 14:20:50 +09:00
eeh_cache.c powerpc/eeh: Cache normal BARs, not windows or IOV BARs 2016-03-09 09:58:17 +11:00
eeh_dev.c powerpc/eeh: powerpc/eeh: Support error recovery for VF PE 2016-03-09 09:58:23 +11:00
eeh_driver.c powerpc/eeh: Fix invalid cached PE primary bus 2016-06-17 19:51:47 +10:00
eeh_event.c powerpc: sparse: static-ify some things 2016-04-12 21:05:18 +10:00
eeh_pe.c powerpc/eeh: fix misleading indentation 2016-04-27 09:19:37 +10:00
eeh_sysfs.c powerpc/eeh: Fix PE state format 2014-11-27 09:32:58 +11:00
eeh.c Revert "powerpc/eeh: Fix crash in eeh_add_device_early() on Cell" 2016-05-12 19:52:21 +10:00
entry_32.S powerpc/kernel: Change the do_syscall_trace_enter() API 2015-07-29 11:56:11 +10:00
entry_64.S Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching 2016-05-17 17:11:27 -07:00
epapr_hcalls.S
epapr_paravirt.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-06-10 18:54:22 -07:00
exceptions-64e.S powerpc/book3e: support CONFIG_RELOCATABLE 2015-10-27 18:13:27 -05:00
exceptions-64s.S powerpc: Fix faults caused by radix patching of SLB miss handler 2016-06-23 09:58:17 +10:00
fadump.c powerpc/fadump: rename cpu_online_mask member of struct fadump_crash_info_header 2016-01-20 17:09:18 -08:00
firmware.c
fpu.S powerpc: Add the ability to save FPU without giving it up 2016-03-02 23:34:49 +11:00
fsl_booke_entry_mapping.S powerpc/fsl: Force coherent memory on e500mc derivatives 2015-08-07 23:00:01 -05:00
ftrace.c ftrace: Match dot symbols when searching functions on ppc64 2016-04-27 09:47:29 +10:00
head_8xx.S powerpc/8xx: rewrite set_context() in C 2016-03-11 17:20:11 -06:00
head_32.S
head_40x.S powerpc: Remove check for CONFIG_SERIAL_TEXT_DEBUG 2014-06-11 16:31:21 +10:00
head_44x.S powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
head_64.S powerpc/mm/radix: Make sure swapper pgdir is properly aligned 2016-05-11 21:53:55 +10:00
head_booke.h
head_fsl_booke.S powerpc/cache: add cache flush operation for various e500 2016-03-04 23:44:51 -06:00
hw_breakpoint.c powerpc/hw_breakpoint: Fix oops when destroying hw_breakpoint event 2016-03-03 22:06:08 +11:00
ibmebus.c powerpc: sparse: static-ify some things 2016-04-12 21:05:18 +10:00
idle_6xx.S
idle_book3e.S powerpc: No need to use dot symbols when branching to a function 2014-04-23 10:05:16 +10:00
idle_e500.S powerpc/e500mc: Remove dead L2 flushing code in idle_e500.S 2015-06-02 21:37:19 -05:00
idle_power4.S powerpc: No need to use dot symbols when branching to a function 2014-04-23 10:05:16 +10:00
idle_power7.S powerpc/mm: Move hash related mmu-*.h headers to book3s/ 2016-03-03 21:19:21 +11:00
idle.c
io-workarounds.c powerpc/mm: Differentiate between hugetlb and THP during page walk 2015-10-12 15:30:09 +11:00
io.c
iomap.c powerpc/kerenl: Enable EEH for IO accessors 2014-06-24 12:43:13 +10:00
iommu.c powerpc/iommu/powernv: Release replaced TCE 2015-06-11 15:16:49 +10:00
irq.c powerpc/livepatch: Add livepatch stack to struct thread_info 2016-04-14 15:47:06 +10:00
isa-bridge.c powerpc/mm: Use a helper for finding pte bits mapping I/O area 2016-05-01 18:32:32 +10:00
jump_label.c jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP} 2015-08-03 11:34:12 +02:00
kgdb.c powerpc: Fix kgdb on little endian ppc64le 2016-02-18 00:03:26 +11:00
kprobes.c powerpc: Replace __get_cpu_var uses 2014-11-03 12:12:32 +11:00
kvm_emul.S
kvm.c powerpc: Remove redundant breaks 2015-08-06 15:10:20 +10:00
l2cr_6xx.S
legacy_serial.c powerpc: make of_device_ids const 2014-09-25 23:14:46 +10:00
machine_kexec_32.c
machine_kexec_64.c powerpc: Update of_remove_property() call sites to remove null checking 2016-05-11 21:54:04 +10:00
machine_kexec.c powerpc: Update of_remove_property() call sites to remove null checking 2016-05-11 21:54:04 +10:00
Makefile powerpc/ftrace: Use $(CC_FLAGS_FTRACE) when disabling ftrace 2016-03-07 14:53:55 +11:00
mce_power.c powerpc/mm/radix: Fix CONFIG_PPC_MMU_STD_64 typo 2016-05-11 21:53:59 +10:00
mce.c powerpc updates for 4.7 2016-05-20 10:12:41 -07:00
misc_32.S powerpc: Remove orphaned asm implementation of abs() 2016-04-11 20:30:41 +10:00
misc_64.S powerpc: Simplify module TOC handling 2016-01-21 14:10:56 +11:00
misc.S powerpc: Rename __get_SP() to current_stack_pointer() 2014-10-15 11:23:20 +11:00
module_32.c powerpc/module: Only try to generate the ftrace_caller() stub once 2016-03-07 14:53:53 +11:00
module_64.c Merge branch 'topic/livepatch' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux into for-4.7/livepatching-ppc64le 2016-04-15 11:42:51 +02:00
module.c powerpc/module: Only try to generate the ftrace_caller() stub once 2016-03-07 14:53:53 +11:00
msi.c powerpc: Remove MSI-related PCI controller ops from ppc_md 2015-06-02 11:47:45 +10:00
nvram_64.c powerpc: make kernel/nvram_64.c explicitly non-modular 2016-04-11 20:30:43 +10:00
of_platform.c powerpc/eeh: Do probe on pci_dn 2015-03-24 13:15:52 +11:00
paca.c powerpc: Create a helper for getting the kernel toc value 2016-03-07 14:53:52 +11:00
pci_32.c powerpc: Remove more traces of bootmem 2014-11-19 21:41:51 +11:00
pci_64.c powerpc/mm: vmalloc abstraction in preparation for radix 2016-05-11 21:53:53 +10:00
pci_dn.c powerpc/pci: Export pci_traverse_device_nodes() 2016-05-11 21:54:25 +10:00
pci_of_scan.c PCI/MSI: Initialize MSI capability for all architectures 2015-11-24 17:45:18 -06:00
pci-common.c powerpc/pci: export pcibios_free_controller() 2015-10-15 20:31:57 +11:00
pci-hotplug.c powerpc/pci: Don't scan empty slot 2016-05-11 21:54:26 +10:00
pmc.c
ppc32.h
ppc_ksyms_32.c powerpc32: Remove clear_pages() and define clear_page() inline 2016-03-11 17:20:11 -06:00
ppc_ksyms.c powerpc32: move xxxxx_dcache_range() functions inline 2016-03-11 17:20:12 -06:00
ppc_save_regs.S
proc_powerpc.c
process.c exit_thread: remove empty bodies 2016-05-20 17:58:30 -07:00
prom_init_check.sh powerpc: Simplify symbol check in prom_init_check.sh 2014-09-25 23:14:46 +10:00
prom_init.c powerpc/pseries: Fix IBM_ARCH_VEC_NRCORES_OFFSET since POWER8NVL was added 2016-06-08 10:40:05 +10:00
prom_parse.c
prom.c powerpc updates for 4.7 2016-05-20 10:12:41 -07:00
ptrace32.c powerpc: move debug registers in a structure 2013-10-18 18:44:49 -05:00
ptrace.c powerpc/ptrace: Fix out of bounds array access warning 2016-06-06 10:48:07 +10:00
reloc_32.S
reloc_64.S powerpc: Align p_dyn, p_rela and p_st symbols 2014-03-07 13:50:19 +11:00
rtas_flash.c powerpc: Fix endianness of flash_block_list in rtas_flash 2014-07-28 11:30:54 +10:00
rtas_pci.c powerpc: move find_and_init_phbs() to pSeries specific code 2015-04-11 20:49:09 +10:00
rtas-proc.c powerpc: LLVM complains about forward declaration of struct rtas_sensors 2014-11-10 09:59:32 +11:00
rtas-rtc.c
rtas.c powerpc/rtas: Make enter_rtas() private 2015-12-17 22:40:56 +11:00
rtasd.c powerpc: sparse: static-ify some things 2016-04-12 21:05:18 +10:00
setup_32.c locking/lockdep: Eliminate lockdep_init() 2016-02-09 12:03:25 +01:00
setup_64.c Merge branch 'topic/livepatch' into next 2016-04-18 20:45:32 +10:00
setup-common.c powerpc: Remove unnecessary CONFIG_SMP #ifdefs 2016-05-11 21:54:01 +10:00
signal_32.c powerpc fixes for 4.4 #2 2015-12-14 20:40:32 +11:00
signal_64.c powerpc fixes for 4.4 #2 2015-12-14 20:40:32 +11:00
signal.c powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
signal.h powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
smp-tbsync.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
smp.c sched: Allow per-cpu kernel threads to run on online && !active 2016-05-06 14:58:22 +02:00
stacktrace.c powerpc: Implement save_stack_trace_regs() to enable kprobe stack tracing 2016-01-11 14:27:28 +11:00
suspend.c nosave: consolidate __nosave_{begin,end} in <asm/sections.h> 2014-10-09 22:26:04 -04:00
swsusp_32.S
swsusp_64.c
swsusp_asm64.S powerpc: Only save/restore SDR1 if in hypervisor mode 2013-10-31 12:37:29 +11:00
swsusp_booke.S powerpc/fsl-booke: Use SPRN_SPRGn rather than mfsprg/mtsprg 2014-01-07 19:06:03 -06:00
swsusp.c powerpc/mm: Abstraction for switch_mmu_context() 2016-05-01 18:33:04 +10:00
sys_ppc32.c
syscalls.c powerpc: Add a proper syscall for switching endianness 2015-03-28 22:03:40 +11:00
sysfs.c powerpc/dscr: Add some in-code documentation 2015-06-07 19:29:15 +10:00
systbl_chk.c powerpc: Standardise on NR_syscalls rather than __NR_syscalls. 2015-11-26 22:11:17 +11:00
systbl_chk.sh powerpc: Standardise on NR_syscalls rather than __NR_syscalls. 2015-11-26 22:11:17 +11:00
systbl.S powerpc: Add a proper syscall for switching endianness 2015-03-28 22:03:40 +11:00
tau_6xx.c
time.c powerpc: sparse: Include headers for __weak symbols 2016-04-12 21:05:19 +10:00
tm.S powerpc/kernel: Rename PACA_DSCR to PACA_DSCR_DEFAULT 2015-06-07 19:29:00 +10:00
trace_clock.c powerpc/ftrace: add powerpc timebase as a trace clock source 2015-08-06 16:36:23 +10:00
traps.c powerpc updates for 4.6 2016-03-19 15:38:41 -07:00
udbg_16550.c powerpc: Fix bad NULL pointer check in udbg_uart_getc_poll() 2014-11-12 13:47:20 +11:00
udbg.c powerpc: Remove the celleb support 2015-04-07 17:15:13 +10:00
uprobes.c uprobes/powerpc: Kill arch_uprobe->ainsn 2013-11-20 16:31:01 +01:00
vdso.c vdso: make arch_setup_additional_pages wait for mmap_sem for write killable 2016-05-23 17:04:14 -07:00
vecemu.c powerpc: Put FP/VSX and VR state into structures 2013-10-11 17:26:49 +11:00
vector.S powerpc: Add the ability to save VSX without giving it up 2016-03-02 23:34:50 +11:00
vio.c powerpc: sparse: static-ify some things 2016-04-12 21:05:18 +10:00
vmlinux.lds.S arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections 2016-03-25 16:37:42 -07:00