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475b581ff5
linux_dsm_epyc7002/arch/powerpc/kernel
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Michael Ellerman 475b581ff5 powerpc/64s: Fix masking of SRR1 bits on instruction fault 
On 64-bit Book3s, when we take an instruction fault the reason for the
fault may be reported in SRR1. For data faults the reason is reported
in DSISR (Data Storage Instruction Status Register).

The reasons reported in each do not necessarily correspond, so we mask
the SRR1 bits before copying them to the DSISR, which is then used by
the page fault code.

Prior to commit b4c001dc44 ("powerpc/mm: Use symbolic constants for
filtering SRR1 bits on ISIs") we used a hard-coded mask of 0x58200000,
which corresponds to:

  DSISR_NOHPTE		0x40000000 /* no translation found */
  DSISR_NOEXEC_OR_G	0x10000000 /* exec of no-exec or guarded */
  DSISR_PROTFAULT	0x08000000 /* protection fault */
  DSISR_KEYFAULT	0x00200000 /* Storage Key fault */

That commit added a #define for the mask, DSISR_SRR1_MATCH_64S, but
incorrectly used a different similarly named DSISR_BAD_FAULT_64S.

This had the effect of changing the mask to 0xa43a0000, which omits
everything but DSISR_KEYFAULT.

Luckily this had no visible effect, because in practice we hardly use
the DSISR bits. The lack of DSISR_NOHPTE means a TLB flush
optimisation was missed in the native HPTE code, and DSISR_NOEXEC_OR_G
and DSISR_PROTFAULT are both only used to trigger rare warnings.

So we got lucky, but let's fix it. The new value only has bits between
17 and 30 set, so we can continue to use andis.

Fixes: b4c001dc44 ("powerpc/mm: Use symbolic constants for filtering SRR1 bits on ISIs")
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-11-14 15:48:47 +11:00
..
trace Merge branch 'fixes' into next 2017-11-10 20:55:03 +11:00
vdso32 powerpc/time: refactor MFTB() to limit number of ifdefs 2017-08-10 23:32:09 +10:00
vdso64 powerpc/vdso64: Use double word compare on pointers 2016-09-29 15:17:57 +10:00
.gitignore
align.c powerpc: Fix check for copy/paste instructions in alignment handler 2017-10-25 12:42:35 +02:00
asm-offsets.c powerpc/64s: mm_context.addr_limit is only used on hash 2017-11-13 23:35:43 +11:00
audit.c
btext.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
cacheinfo.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
cacheinfo.h
compat_audit.c
cpu_setup_6xx.S powerpc: Various typo fixes 2016-06-14 13:58:26 +10:00
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/powernv: Fix local TLB flush for boot and MCE on POWER9 2017-07-11 12:53:53 +10:00
cpu_setup_ppc970.S
cputable.c powerpc: add POWER9_DD20 feature 2017-11-06 22:46:13 +11:00
crash_dump.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
crash.c powerpc/fadump: remove dependency with CONFIG_KEXEC 2017-05-08 17:15:11 -07:00
dbell.c powerpc: Introduce msgsnd/doorbell barrier primitives 2017-04-13 23:34:33 +10:00
dma-iommu.c powerpc: implement ->mapping_error 2017-06-28 06:54:33 -07:00
dma-swiotlb.c treewide: Constify most dma_map_ops structures 2017-01-24 12:23:35 -05:00
dma.c powerpc: merge __dma_set_mask into dma_set_mask 2017-06-28 06:54:55 -07:00
dt_cpu_ftrs.c Merge branch 'fixes' into next 2017-11-10 20:55:03 +11:00
eeh_cache.c powerpc/eeh: Fix pr_debug()s in eeh_cache.c 2016-07-08 22:09:50 +10:00
eeh_dev.c powerpc/eeh: Create PHB PEs after EEH is initialized 2017-09-21 14:56:00 +10:00
eeh_driver.c powerpc/eeh: Stop using do_gettimeofday() 2017-11-06 17:40:00 +11:00
eeh_event.c powerpc/pci: Always print PHB and PE numbers as hexadecimal 2016-11-22 11:57:07 +11:00
eeh_pe.c powerpc/eeh: Stop using do_gettimeofday() 2017-11-06 17:40:00 +11:00
eeh_sysfs.c powerpc/eeh: Remove unnecessary config_addr from eeh_dev 2017-08-31 14:26:09 +10:00
eeh.c powerpc/powernv: Rework EEH initialization on powernv 2017-09-26 11:19:07 +10:00
entry_32.S powerpc/32: Avoid risk of unrecoverable TLBmiss inside entry_32.S 2017-08-15 22:55:53 +10:00
entry_64.S powerpc/64s: Replace CONFIG_PPC_STD_MMU_64 with CONFIG_PPC_BOOK3S_64 2017-11-06 16:48:14 +11:00
epapr_hcalls.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
epapr_paravirt.c
exceptions-64e.S powerpc/64e: Fix hang when debugging programs with relocated kernel 2017-04-30 01:05:18 -05:00
exceptions-64s.S powerpc/64s: Fix masking of SRR1 bits on instruction fault 2017-11-14 15:48:47 +11:00
fadump.c powerpc/fadump: use kstrtoint to handle sysfs store 2017-11-13 10:51:38 +11:00
firmware.c
fpu.S Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2016-10-14 14:26:58 -07:00
fsl_booke_entry_mapping.S
head_8xx.S powerpc/8xx: Reduce DTLB miss handler by one insn 2017-08-15 22:55:55 +10:00
head_32.S powerpc: Fix DABR match on hash based systems 2017-11-13 22:12:48 +11:00
head_40x.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
head_44x.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
head_64.S powerpc/powernv: Avoid waiting for secondary hold spinloop with OPAL 2017-11-10 22:00:54 +11:00
head_booke.h
head_fsl_booke.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
hw_breakpoint.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/scottwood/linux into next 2017-02-18 21:37:14 +11:00
idle_6xx.S
idle_book3e.S
idle_book3s.S powerpc/64s/idle: avoid POWER9 DD1 and DD2.0 PMU workaround on DD2.1 2017-11-06 22:46:16 +11:00
idle_e500.S
idle_power4.S
idle.c
ima_kexec.c powerpc: ima: send the kexec buffer to the next kernel 2016-12-20 09:48:44 -08:00
io-workarounds.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
io.c
iomap.c powerpc: Move isa bridge definitions to separate include 2017-01-31 13:54:17 +11:00
iommu.c powerpc/iommu: Use permission-specific DEVICE_ATTR variants 2017-09-01 16:42:54 +10:00
irq.c powerpc/64: Fix latency tracing for lazy irq replay 2017-11-06 16:48:07 +11:00
isa-bridge.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
jump_label.c
kexec_elf_64.c powerpc: ima: send the kexec buffer to the next kernel 2016-12-20 09:48:44 -08:00
kgdb.c powerpc/8xx: Getting rid of remaining use of CONFIG_8xx 2017-08-10 23:32:12 +10:00
kprobes-ftrace.c powerpc/kprobes: Do not disable interrupts for optprobes and kprobes_on_ftrace 2017-11-12 23:51:41 +11:00
kprobes.c powerpc/kprobes: refactor kprobe_lookup_name for safer string operations 2017-11-12 23:51:43 +11:00
kvm_emul.S
kvm.c powerpc/64: Fix watchdog configuration regressions 2017-08-31 14:26:00 +10:00
l2cr_6xx.S powerpc/l2cr_6xx: Fix invalid use of register expressions 2017-08-15 21:04:32 +10:00
legacy_serial.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
machine_kexec_32.c
machine_kexec_64.c powerpc/64s: Replace CONFIG_PPC_STD_MMU_64 with CONFIG_PPC_BOOK3S_64 2017-11-06 16:48:14 +11:00
machine_kexec_file_64.c powerpc: ima: send the kexec buffer to the next kernel 2016-12-20 09:48:44 -08:00
machine_kexec.c powerpc: Update of_remove_property() call sites to remove null checking 2016-05-11 21:54:04 +10:00
Makefile powerpc/64s: ppc_save_regs is now needed for all 64s builds 2017-11-12 23:44:36 +11:00
mce_power.c Merge branch 'fixes' into next 2017-11-10 20:55:03 +11:00
mce.c powerpc/mce: hookup memory_failure for UE errors 2017-10-16 23:12:02 +11:00
misc_32.S powerpc/40x: Clear MSR_DR in one insn instead of two 2017-06-02 19:20:43 +10:00
misc_64.S powerpc/kexec: Fix radix to hash kexec due to IAMR/AMOR 2017-07-10 21:07:38 +10:00
misc.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
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 powerpc/modules: Use WARN_ON() in stub_for_addr() 2017-10-13 19:41:57 +11:00
module.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
msi.c
nvram_64.c powerpc/nvram: use memdup_user 2017-06-27 17:02:50 -07:00
of_platform.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
optprobes_head.S powerpc/kprobes: Don't save/restore DAR/DSISR to/from pt_regs for optprobes 2017-08-24 16:19:01 +10:00
optprobes.c powerpc/kprobes: Do not disable interrupts for optprobes and kprobes_on_ftrace 2017-11-12 23:51:41 +11:00
paca.c powerpc/64s: mm_context.addr_limit is only used on hash 2017-11-13 23:35:43 +11:00
pci_32.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
pci_64.c powerpc/64s: Replace CONFIG_PPC_STD_MMU_64 with CONFIG_PPC_BOOK3S_64 2017-11-06 16:48:14 +11:00
pci_dn.c powerpc/pci: Remove OF node back pointer from pci_dn 2017-08-31 14:26:12 +10:00
pci_of_scan.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
pci-common.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
pci-hotplug.c powerpc/pci: Don't scan empty slot 2016-05-11 21:54:26 +10:00
pmc.c
ppc32.h
ppc_save_regs.S
proc_powerpc.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
process.c powerpc: Define set_thread_uses_vas() 2017-11-12 09:03:09 +11:00
prom_init_check.sh
prom_init.c powerpc/xive: add XIVE Exploitation Mode to CAS 2017-09-02 21:02:38 +10:00
prom_parse.c
prom.c powerpc/64s: Replace CONFIG_PPC_STD_MMU_64 with CONFIG_PPC_BOOK3S_64 2017-11-06 16:48:14 +11:00
ptrace32.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
ptrace.c powerpc/tm: Flush TM only if CPU has TM feature 2017-09-20 13:30:09 +10:00
reloc_32.S
reloc_64.S powerpc/asm: Convert .llong directives to .8byte 2017-08-31 14:26:47 +10:00
rtas_flash.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
rtas_pci.c powerpc/kernel: Change retrieval of pci_dn 2017-08-31 14:26:40 +10:00
rtas-proc.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
rtas-rtc.c
rtas.c mm: treewide: remove GFP_TEMPORARY allocation flag 2017-09-13 18:53:16 -07:00
rtasd.c powerpc: Only obtain cpu_hotplug_lock if called by rtasd 2017-06-23 09:32:11 +02:00
setup_32.c powerpc/32: remove a NOP from memset() 2017-09-01 16:42:46 +10:00
setup_64.c powerpc/64: Set DSCR default initially from SPR 2017-11-10 22:11:35 +11:00
setup-common.c powerpc/64s: mm_context.addr_limit is only used on hash 2017-11-13 23:35:43 +11:00
setup.h powerpc/64: Set DSCR default initially from SPR 2017-11-10 22:11:35 +11:00
signal_32.c powerpc: Always save/restore checkpointed regs during treclaim/trecheckpoint 2017-11-06 20:39:33 +11:00
signal_64.c powerpc: Always save/restore checkpointed regs during treclaim/trecheckpoint 2017-11-06 20:39:33 +11:00
signal.c powerpc/signal: Properly handle return value from uprobe_deny_signal() 2017-11-13 10:53:05 +11:00
signal.h powerpc: tm: Rename transct_(*) to ck(\1)_state 2016-10-04 20:33:16 +11:00
smp-tbsync.c
smp.c powerpc/smp: Add Power9 scheduler topology 2017-08-31 18:16:08 +10:00
stacktrace.c powerpc: Make /proc/self/stack always print the current stack 2017-03-28 14:43:59 +11:00
suspend.c
swsusp_32.S
swsusp_64.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/nmi.h> 2017-03-02 08:42:30 +01:00
swsusp_asm64.S powerpc: Fix invalid use of register expressions 2017-08-10 22:29:41 +10:00
swsusp_booke.S
swsusp.c powerpc/swsusp: Include suspend.h to silence sparse warnings 2017-03-20 19:02:49 +11:00
sys_ppc32.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
syscalls.c powerpc/tracing: Allow tracing of mmap syscalls 2017-04-12 22:32:43 +10:00
sysfs.c powerpc/64: Set DSCR default initially from SPR 2017-11-10 22:11:35 +11:00
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/asm: Convert .llong directives to .8byte 2017-08-31 14:26:47 +10:00
tau_6xx.c powerpc/6xx: Use setup_timer() helper 2017-10-04 11:28:02 +11:00
time.c powerpc: use spin loop primitives in some functions 2017-07-02 20:40:24 +10:00
tm.S powerpc: Always save/restore checkpointed regs during treclaim/trecheckpoint 2017-11-06 20:39:33 +11:00
traps.c powerpc: Remove facility loadups on transactional {fp, vec, vsx} unavailable 2017-11-06 20:39:34 +11:00
udbg_16550.c
udbg.c
uprobes.c powerpc/uprobes: Implement arch_uretprobe_is_alive() 2017-08-24 16:19:21 +10:00
vdso.c powerpc/64: Clean up ppc64_caches using a struct per cache 2017-02-06 19:46:04 +11:00
vecemu.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
vector.S Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2016-10-14 14:26:58 -07:00
vmlinux.lds.S powerpc/mm: Implement STRICT_KERNEL_RWX on PPC32 2017-08-15 22:55:57 +10:00
watchdog.c powerpc/watchdog: Do not trigger SMP crash from touch_nmi_watchdog 2017-10-04 11:26:02 +11:00