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OvmfPkg: Reserve and init EmuVariableNvStore in Pei-less Startup 

EmuVariableNvStore is reserved and init with below 2 functions defined in
PlatformInitLib:
 - PlatformReserveEmuVariableNvStore
 - PlatformInitEmuVariableNvStore

PlatformInitEmuVariableNvStore works when secure boot feature is enabled.
This is because secure boot needs the EFI variables (PK/KEK/DB/DBX, etc)
and EmuVariableNvStore is cleared when OVMF is launched with -bios
parameter.

Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
This commit is contained in:
Min M Xu 2022-06-22 09:13:48 +08:00 committed by mergify[bot]
parent 58eb8517ad
commit ee91d9ef24
1 changed files with 7 additions and 0 deletions
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7
OvmfPkg/Library/PeilessStartupLib/PeilessStartup.c
View File

@ -42,6 +42,7 @@ InitializePlatform (
)
{
UINT32 LowerMemorySize;
VOID *VariableStore;
DEBUG ((DEBUG_INFO, "InitializePlatform in Pei-less boot\n"));
PlatformDebugDumpCmos ();
@ -79,6 +80,12 @@ InitializePlatform (
LowerMemorySize
));
VariableStore = PlatformReserveEmuVariableNvStore ();
PlatformInfoHob->PcdEmuVariableNvStoreReserved = (UINT64)(UINTN)VariableStore;
#ifdef SECURE_BOOT_FEATURE_ENABLED
PlatformInitEmuVariableNvStore (VariableStore);
#endif
if (TdIsEnabled ()) {
PlatformTdxPublishRamRegions ();
} else {