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OvmfPkg/PlatformPei: Update ReserveEmuVariableNvStore 

ReserveEmuVariableNvStore is updated 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 09:08:41 +08:00 committed by mergify[bot]
parent 4f173db8b4
commit 58eb8517ad
1 changed files with 7 additions and 18 deletions
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25
OvmfPkg/PlatformPei/Platform.c
View File

@ -220,24 +220,13 @@ ReserveEmuVariableNvStore (
EFI_PHYSICAL_ADDRESS VariableStore;
RETURN_STATUS PcdStatus;
//
// Allocate storage for NV variables early on so it will be
// at a consistent address. Since VM memory is preserved
// across reboots, this allows the NV variable storage to survive
// a VM reboot.
//
VariableStore =
(EFI_PHYSICAL_ADDRESS)(UINTN)
AllocateRuntimePages (
EFI_SIZE_TO_PAGES (2 * PcdGet32 (PcdFlashNvStorageFtwSpareSize))
);
DEBUG ((
DEBUG_INFO,
"Reserved variable store memory: 0x%lX; size: %dkb\n",
VariableStore,
(2 * PcdGet32 (PcdFlashNvStorageFtwSpareSize)) / 1024
));
PcdStatus = PcdSet64S (PcdEmuVariableNvStoreReserved, VariableStore);
VariableStore = (EFI_PHYSICAL_ADDRESS)(UINTN)PlatformReserveEmuVariableNvStore ();
PcdStatus = PcdSet64S (PcdEmuVariableNvStoreReserved, VariableStore);
#ifdef SECURE_BOOT_FEATURE_ENABLED
PlatformInitEmuVariableNvStore ((VOID *)(UINTN)VariableStore);
#endif
ASSERT_RETURN_ERROR (PcdStatus);
}