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| author |   Joerg Roedel <jroedel@suse.de> | 2020-09-07 15:15:44 +0200 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2020-09-09 11:33:19 +0200 |
| commit | 315562c9af3d583502b35c4b223a08d95ce69864 (patch) | |
| tree | a3351da80cc8801eadebe8185d591583f5e49760 /arch/x86/include/asm/stacktrace.h | |
| parent | x86/sev-es: Allocate and map an IST stack for #VC handler (diff) | |
| download | linux-dev-315562c9af3d583502b35c4b223a08d95ce69864.tar.xz linux-dev-315562c9af3d583502b35c4b223a08d95ce69864.zip | |
x86/sev-es: Adjust #VC IST Stack on entering NMI handler
When an NMI hits in the #VC handler entry code before it has switched to
another stack, any subsequent #VC exception in the NMI code-path will
overwrite the interrupted #VC handler's stack.
Make sure this doesn't happen by explicitly adjusting the #VC IST entry
in the NMI handler for the time it can cause #VC exceptions.
[ bp: Touchups, spelling fixes. ]
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200907131613.12703-44-joro@8bytes.org
Diffstat (limited to 'arch/x86/include/asm/stacktrace.h')
0 files changed, 0 insertions, 0 deletions