From: Tom Lendacky <thomas.lendacky@amd.com>
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198
Under SEV-ES, a WBINVD intercept generates a #VC exception. VMGEXIT must be
used to allow the hypervisor to handle this intercept.
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
.../X64/AMDSevVcCommon.c | 22 +++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c
index aac460c388e3..f8966cc3eca0 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c
@@ -555,6 +555,24 @@ UnsupportedExit (
return Status;
}
+STATIC
+UINTN
+WbinvdExit (
+ GHCB *Ghcb,
+ EFI_SYSTEM_CONTEXT_X64 *Regs,
+ SEV_ES_INSTRUCTION_DATA *InstructionData
+ )
+{
+ UINTN Status;
+
+ Status = VmgExit (Ghcb, SvmExitWbinvd, 0, 0);
+ if (Status) {
+ return Status;
+ }
+
+ return 0;
+}
+
STATIC
UINTN
MsrExit (
@@ -875,6 +893,10 @@ DoVcCommon (
NaeExit = MsrExit;
break;
+ case SvmExitWbinvd:
+ NaeExit = WbinvdExit;
+ break;
+
case SvmExitNpf:
NaeExit = MmioExit;
break;
--
2.17.1
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