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| author | Brijesh Singh <brijesh.singh@amd.com> | 2022-04-26 17:50:54 +0000 |
|---|---|---|
| committer | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2022-07-13 17:27:26 -0500 |
| commit | 6f94122fc885c967ee582076bfcc910c27a2eac2 (patch) | |
| tree | 24c5a5429d25436ea866115fedf7c187d55beeee /include | |
| parent | 91bda2dfb5cbdd4b2e934db7acdcbcacabc9d735 (diff) | |
| download | cachepc-linux-6f94122fc885c967ee582076bfcc910c27a2eac2.tar.gz cachepc-linux-6f94122fc885c967ee582076bfcc910c27a2eac2.zip | |
x86/fault: Add support to dump RMP entry on fault
When SEV-SNP is enabled globally, a write from the host goes through the
RMP check. If the hardware encounters the check failure, then it raises
the #PF (with RMP set). Dump the RMP entry at the faulting pfn to help
the debug.
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sev.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/sev.h b/include/linux/sev.h index 1a68842789e1..734b13a69c54 100644 --- a/include/linux/sev.h +++ b/include/linux/sev.h @@ -16,6 +16,7 @@ int snp_lookup_rmpentry(u64 pfn, int *level); int psmash(u64 pfn); int rmp_make_private(u64 pfn, u64 gpa, enum pg_level level, int asid, bool immutable); int rmp_make_shared(u64 pfn, enum pg_level level); +void dump_rmpentry(u64 pfn); #else static inline int snp_lookup_rmpentry(u64 pfn, int *level) { return 0; } static inline int psmash(u64 pfn) { return -ENXIO; } @@ -25,6 +26,7 @@ static inline int rmp_make_private(u64 pfn, u64 gpa, enum pg_level level, int as return -ENODEV; } static inline int rmp_make_shared(u64 pfn, enum pg_level level) { return -ENODEV; } +static inline void dump_rmpentry(u64 pfn) { } #endif /* CONFIG_AMD_MEM_ENCRYPT */ #endif /* __LINUX_SEV_H */ |