BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198
Under SEV-ES, a INVD intercept generates a #VC exception. VMGEXIT must be
used to allow the hypervisor to handle this intercept.
Cc: Jordan Justen <jordan.l.jus...@intel.com>
Cc: Laszlo Ersek <ler...@redhat.com>
Cc: Ard Biesheuvel <ard.biesheu...@arm.com>
Signed-off-by: Tom Lendacky <thomas.lenda...@amd.com>
---
.../Library/VmgExitLib/X64/VmgExitVcHandler.c | 36 +++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/OvmfPkg/Library/VmgExitLib/X64/VmgExitVcHandler.c
b/OvmfPkg/Library/VmgExitLib/X64/VmgExitVcHandler.c
index d6b35b3019c3..0b7f24fd962c 100644
--- a/OvmfPkg/Library/VmgExitLib/X64/VmgExitVcHandler.c
+++ b/OvmfPkg/Library/VmgExitLib/X64/VmgExitVcHandler.c
@@ -1162,6 +1162,38 @@ IoioExit (
return 0;
}
+/**
+ Handle a INVD event.
+
+ Use the VMGEXIT instruction to handle a INVD event.
+
+ @param[in, out] Ghcb Pointer to the Guest-Hypervisor
Communication
+ Block
+ @param[in, out] Regs x64 processor context
+ @param[in] InstructionData Instruction parsing context
+
+ @retval 0 Event handled successfully
+ @retval Others New exception value to propagate
+
+**/
+STATIC
+UINT64
+InvdExit (
+ IN OUT GHCB *Ghcb,
+ IN OUT EFI_SYSTEM_CONTEXT_X64 *Regs,
+ IN SEV_ES_INSTRUCTION_DATA *InstructionData
+ )
+{
+ UINT64 Status;
+
+ Status = VmgExit (Ghcb, SVM_EXIT_INVD, 0, 0);
+ if (Status) {
+ return Status;
+ }
+
+ return 0;
+}
+
/**
Handle a CPUID event.
@@ -1351,6 +1383,10 @@ VmgExitHandleVc (
NaeExit = CpuidExit;
break;
+ case SVM_EXIT_INVD:
+ NaeExit = InvdExit;
+ break;
+
case SVM_EXIT_IOIO_PROT:
NaeExit = IoioExit;
break;
--
2.17.1
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