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| author | Brijesh Singh <brijesh.singh@amd.com> | 2021-12-09 11:27:46 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2021-12-09 06:28:10 +0000 |
| commit | 202fb22be6e9100c2ce6329f1b09f885dfdb514a (patch) | |
| tree | d937c25f4180dc8dedcc25d539df317a0051a620 /OvmfPkg/Sec/AmdSev.h | |
| parent | d39f8d88ecb31df46e2f95bcc5c20100d1f14681 (diff) | |
| download | edk2-202fb22be6e9100c2ce6329f1b09f885dfdb514a.zip edk2-202fb22be6e9100c2ce6329f1b09f885dfdb514a.tar.gz edk2-202fb22be6e9100c2ce6329f1b09f885dfdb514a.tar.bz2 | |
OvmfPkg/SecMain: validate the memory used for decompressing Fv
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3275
The VMM launch sequence should have pre-validated all the data pages used
in the Reset vector. The range does not cover the data pages used during
the SEC phase (mainly PEI and DXE firmware volume decompression memory).
When SEV-SNP is active, the memory must be pre-validated before the access.
Add support to pre-validate the memory range from SnpSecPreValidatedStart
to SnpSecPreValidatedEnd. This should be sufficent to enter into the PEI
phase.
Cc: Michael Roth <michael.roth@amd.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Min Xu <min.m.xu@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Jiewen Yao <Jiewen.yao@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Diffstat (limited to 'OvmfPkg/Sec/AmdSev.h')
| -rw-r--r-- | OvmfPkg/Sec/AmdSev.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/OvmfPkg/Sec/AmdSev.h b/OvmfPkg/Sec/AmdSev.h index c0b1ca9..dffd2ce 100644 --- a/OvmfPkg/Sec/AmdSev.h +++ b/OvmfPkg/Sec/AmdSev.h @@ -68,4 +68,27 @@ SevEsIsEnabled ( VOID
);
+/**
+ Validate System RAM used for decompressing the PEI and DXE firmware volumes
+ when SEV-SNP is active. The PCDs SecValidatedStart and SecValidatedEnd are
+ set in OvmfPkg/FvmainCompactScratchEnd.fdf.inc.
+
+**/
+VOID
+SecValidateSystemRam (
+ VOID
+ );
+
+/**
+ Determine if SEV-SNP is active.
+
+ @retval TRUE SEV-SNP is enabled
+ @retval FALSE SEV-SNP is not enabled
+
+**/
+BOOLEAN
+SevSnpIsEnabled (
+ VOID
+ );
+
#endif
|