BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4807
This patch series provides fixes for boot VM when use secure boot
supported (-D SECURE_BOOT_ENABLE=TRUE) OVMF packages.
- Detect FlashNvVarStore before calls PlaformValidateNvVarStore in
PlatformInitLib
and skip the validation process if the FlashNvVarStore doesn't exist. Since
the
PlatformValidateNvVarStore will return false if the FlashNvVarStore doesn't
exist, this will trigger ASSERT (FALSE) and prevent the guest from moving
forward.
- Init the whole range of EmuVariableNvStore before copy content from the
FlashNvVarStore to EmuVariableNvStore. If the Ftw (Fault Tolerant Write) part
of the EmuVariableNvStore isn't initialized, the FaultToleranteWriteDxe will
use scrambled address to access memory and leads to crash if the VM is a
SEV guest.
- Fix the mapping for FlashNvVarStore. If launch a SEV VM with only OVMF.fd,
the address range for FlashNvVarStore should be mapped as encrypted before
access FlashNvVarStore in PlatformValidateNvVarStore. If launch a SEV VM with
both OVMF_CODE.fd and OVMF_VARS.fd, the address range for FlashNvVarStore
should be mapped as decrypted before access FlashNvVarStore in
PlatformValidateNvVarStore.
---
These patches based on commit:
d4dbe5e101dc ("SecurityPkg/Tcg2Acpi: Revise debug print")
Han Liyang (3):
OvmfPkg/PlatformPei: Update mapping of FlashNvVarStore before validate it
OvmfPkg/PlatformInitLib: Init the EmuVariableNvStore before copy data
OvmfPkg/PlatformInitLib: Detect FlashNvVarStore before validate it
OvmfPkg/Library/PlatformInitLib/Platform.c | 67 +++++++++++
OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf | 1 +
OvmfPkg/PlatformPei/AmdSev.c | 105 ++++++++++++++++++
OvmfPkg/PlatformPei/Platform.c | 6 +
OvmfPkg/PlatformPei/Platform.h | 6 +
OvmfPkg/PlatformPei/PlatformPei.inf | 1 +
6 files changed, 186 insertions(+)
--
2.25.1
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