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| author |   Nicholas Piggin <npiggin@gmail.com> | 2020-11-28 17:07:26 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-12-04 01:01:23 +1100 |
| commit | 82f70a05108c98aea4f140067c44a606262d2af7 (patch) | |
| tree | 9885c019d3dc393890189b1d17da4eec87bbab2f | |
| parent | powerpc/64s/powernv: Ratelimit harmless HMI error printing (diff) | |
| download | linux-dev-82f70a05108c98aea4f140067c44a606262d2af7.tar.xz linux-dev-82f70a05108c98aea4f140067c44a606262d2af7.zip | |
powerpc/64s/pseries: Add ERAT specific machine check handler
Don't treat ERAT MCEs as SLB, don't save the SLB and use a specific
ERAT flush to recover it.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201128070728.825934-7-npiggin@gmail.com
| -rw-r--r-- | arch/powerpc/include/asm/mce.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/mce_power.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/ras.c | 5 |
3 files changed, 6 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/mce.h b/arch/powerpc/include/asm/mce.h index 89aa8248a57d..e6c27ae843dc 100644 --- a/arch/powerpc/include/asm/mce.h +++ b/arch/powerpc/include/asm/mce.h @@ -228,6 +228,7 @@ int mce_register_notifier(struct notifier_block *nb); int mce_unregister_notifier(struct notifier_block *nb); #ifdef CONFIG_PPC_BOOK3S_64 void flush_and_reload_slb(void); +void flush_erat(void); long __machine_check_early_realmode_p7(struct pt_regs *regs); long __machine_check_early_realmode_p8(struct pt_regs *regs); long __machine_check_early_realmode_p9(struct pt_regs *regs); diff --git a/arch/powerpc/kernel/mce_power.c b/arch/powerpc/kernel/mce_power.c index 1372ce3f7bdd..667104d4c455 100644 --- a/arch/powerpc/kernel/mce_power.c +++ b/arch/powerpc/kernel/mce_power.c @@ -97,7 +97,7 @@ void flush_and_reload_slb(void) } #endif -static void flush_erat(void) +void flush_erat(void) { #ifdef CONFIG_PPC_BOOK3S_64 if (!early_cpu_has_feature(CPU_FTR_ARCH_300)) { diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c index b2b245b25edb..149cec2212e6 100644 --- a/arch/powerpc/platforms/pseries/ras.c +++ b/arch/powerpc/platforms/pseries/ras.c @@ -526,8 +526,11 @@ static int mce_handle_err_realmode(int disposition, u8 error_type) #ifdef CONFIG_PPC_BOOK3S_64 if (disposition == RTAS_DISP_NOT_RECOVERED) { switch (error_type) { - case MC_ERROR_TYPE_SLB: case MC_ERROR_TYPE_ERAT: + flush_erat(); + disposition = RTAS_DISP_FULLY_RECOVERED; + break; + case MC_ERROR_TYPE_SLB: /* * Store the old slb content in paca before flushing. * Print this when we go to virtual mode. |