[PATCH v6 19/42] UefiCpuPkg/CpuExceptionHandler: Add support for INVD NAE events

["Lendacky, Thomas" <thomas.lendacky@amd.com>]

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: 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/ArchAMDSevVcHandler.c                 | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchAMDSevVcHandler.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchAMDSevVcHandler.c
index ea67648d12ff..acba14d995cb 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchAMDSevVcHandler.c
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchAMDSevVcHandler.c
@@ -856,6 +856,24 @@ IoioExit (
   return 0;
 }
 
+STATIC
+UINT64
+InvdExit (
+  GHCB                     *Ghcb,
+  EFI_SYSTEM_CONTEXT_X64   *Regs,
+  SEV_ES_INSTRUCTION_DATA  *InstructionData
+  )
+{
+  UINT64  Status;
+
+  Status = VmgExit (Ghcb, SvmExitInvd, 0, 0);
+  if (Status) {
+    return Status;
+  }
+
+  return 0;
+}
+
 STATIC
 UINT64
 CpuidExit (
@@ -975,6 +993,10 @@ DoVcCommon (
     NaeExit = CpuidExit;
     break;
 
+  case SvmExitInvd:
+    NaeExit = InvdExit;
+    break;
+
   case SvmExitIoioProt:
     NaeExit = IoioExit;
     break;
-- 
2.17.1