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| author |   Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | 2018-09-11 19:57:00 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2018-09-19 21:59:22 +1000 |
| commit | a43c1590426c44a5c6bbaf51b70a36a5c6d86914 (patch) | |
| tree | df756695fbf54f7aca9bf2d9f54160a13ffebe29 /arch/powerpc/platforms/powernv/opal.c | |
| parent | powerpc/pseries: Define MCE error event section. (diff) | |
| download | linux-dev-a43c1590426c44a5c6bbaf51b70a36a5c6d86914.tar.xz linux-dev-a43c1590426c44a5c6bbaf51b70a36a5c6d86914.zip | |
powerpc/pseries: Flush SLB contents on SLB MCE errors.
On pseries, as of today system crashes if we get a machine check
exceptions due to SLB errors. These are soft errors and can be fixed
by flushing the SLBs so the kernel can continue to function instead of
system crash. We do this in real mode before turning on MMU. Otherwise
we would run into nested machine checks. This patch now fetches the
rtas error log in real mode and flushes the SLBs on SLB/ERAT errors.
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michal Suchanek <msuchanek@suse.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms/powernv/opal.c')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index 38fe4087484a..62c291e23dbe 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -578,6 +578,8 @@ int opal_machine_check(struct pt_regs *regs) { struct machine_check_event evt; + __this_cpu_inc(irq_stat.mce_exceptions); + if (!get_mce_event(&evt, MCE_EVENT_RELEASE)) return 0; |