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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2024-11-18 12:59:32 -0600 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2024-11-23 18:02:30 +0000 |
| commit | f0d2bc3ab268c8e3c6da4158208df38bc9d3677e (patch) | |
| tree | 10330c90c0c8ce7cd1b925b05a514e52264bf804 | |
| parent | a6f1433e9598bfb7948d9af6b817e521d299a57d (diff) | |
| download | edk2-f0d2bc3ab268c8e3c6da4158208df38bc9d3677e.tar.gz | |
OvmfPkg/QemuFlashFvbServicesRuntimeDxe: Do not use flash with SEV-SNP
SEV-SNP does not support the use of the Qemu flash device as SEV-SNP
guests are started using the Qemu -bios option instead of the Qemu -drive
if=pflash option. Perform runtime detection of SEV-SNP and exit early from
the Qemu flash device initialization, indicating the Qemu flash device is
not present. SEV-SNP guests will use the emulated variable support.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
| -rw-r--r-- | OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c index a577aea556..5e393e98ed 100644 --- a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c +++ b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c @@ -259,6 +259,14 @@ QemuFlashInitialize ( VOID
)
{
+ //
+ // The SNP model does not provide for QEMU flash device support, so exit
+ // early before attempting to initialize any QEMU flash device support.
+ //
+ if (MemEncryptSevSnpIsEnabled ()) {
+ return EFI_UNSUPPORTED;
+ }
+
mFlashBase = (UINT8 *)(UINTN)PcdGet32 (PcdOvmfFdBaseAddress);
mFdBlockSize = PcdGet32 (PcdOvmfFirmwareBlockSize);
ASSERT (PcdGet32 (PcdOvmfFirmwareFdSize) % mFdBlockSize == 0);
|