[edk2-devel] [RFC PATCH v3 08/43] UefiCpuPkg/CpuExceptionHandler: Add base support for the #VC exception
Lendacky, Thomas
thomas.lendacky at amd.com
Wed Nov 20 20:06:30 UTC 2019
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198
Add base support to handle #VC exceptions. This includes a stub routine
to invoke when a #VC exception occurs and special checks in the common
exception handlers to invoke the #VC exception handler routine.
Cc: Eric Dong <eric.dong at intel.com>
Cc: Ray Ni <ray.ni at intel.com>
Cc: Laszlo Ersek <lersek at redhat.com>
Cc: Jordan Justen <jordan.l.justen at intel.com>
Cc: Ard Biesheuvel <ard.biesheuvel at linaro.org>
Cc: Maurice Ma <maurice.ma at intel.com>
Cc: Guo Dong <guo.dong at intel.com>
Cc: Benjamin You <benjamin.you at intel.com>
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
---
OvmfPkg/OvmfPkgIa32.dsc | 5 ++
OvmfPkg/OvmfPkgIa32X64.dsc | 5 ++
OvmfPkg/OvmfPkgX64.dsc | 5 ++
UefiPayloadPkg/UefiPayloadPkgIa32.dsc | 2 +
UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc | 2 +
.../DxeCpuExceptionHandlerLib.inf | 5 ++
.../PeiCpuExceptionHandlerLib.inf | 5 ++
.../SecPeiCpuExceptionHandlerLib.inf | 8 +++
.../CpuExceptionHandlerLib/AMDSevVcCommon.h | 26 ++++++++++
.../CpuExceptionCommon.h | 2 +
.../CpuExceptionCommon.c | 2 +-
.../Ia32/AMDSevVcCommon.c | 20 ++++++++
.../PeiDxeAMDSevVcHandler.c | 29 +++++++++++
.../PeiDxeSmmCpuException.c | 16 ++++++
.../SecAMDSevVcHandler.c | 50 +++++++++++++++++++
.../SecPeiCpuException.c | 16 ++++++
.../X64/AMDSevVcCommon.c | 35 +++++++++++++
17 files changed, 232 insertions(+), 1 deletion(-)
create mode 100644 UefiCpuPkg/Library/CpuExceptionHandlerLib/AMDSevVcCommon.h
create mode 100644 UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/AMDSevVcCommon.c
create mode 100644 UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeAMDSevVcHandler.c
create mode 100644 UefiCpuPkg/Library/CpuExceptionHandlerLib/SecAMDSevVcHandler.c
create mode 100644 UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c
diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
index d350b756304e..0e17de188cd6 100644
--- a/OvmfPkg/OvmfPkgIa32.dsc
+++ b/OvmfPkg/OvmfPkgIa32.dsc
@@ -236,6 +236,7 @@ [LibraryClasses.common.SEC]
PeiServicesTablePointerLib|MdePkg/Library/PeiServicesTablePointerLibIdt/PeiServicesTablePointerLibIdt.inf
MemoryAllocationLib|MdePkg/Library/PeiMemoryAllocationLib/PeiMemoryAllocationLib.inf
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
[LibraryClasses.common.PEI_CORE]
HobLib|MdePkg/Library/PeiHobLib/PeiHobLib.inf
@@ -274,6 +275,7 @@ [LibraryClasses.common.PEIM]
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/SecPeiDebugAgentLib.inf
!endif
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
MpInitLib|UefiCpuPkg/Library/MpInitLib/PeiMpInitLib.inf
QemuFwCfgS3Lib|OvmfPkg/Library/QemuFwCfgS3Lib/PeiQemuFwCfgS3LibFwCfg.inf
PcdLib|MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
@@ -299,6 +301,7 @@ [LibraryClasses.common.DXE_CORE]
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgentLib.inf
!endif
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
[LibraryClasses.common.DXE_RUNTIME_DRIVER]
@@ -349,6 +352,7 @@ [LibraryClasses.common.DXE_DRIVER]
PlatformBmPrintScLib|OvmfPkg/Library/PlatformBmPrintScLib/PlatformBmPrintScLib.inf
QemuBootOrderLib|OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.inf
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
!if $(SMM_REQUIRE) == TRUE
LockBoxLib|MdeModulePkg/Library/SmmLockBoxLib/SmmLockBoxDxeLib.inf
!else
@@ -392,6 +396,7 @@ [LibraryClasses.common.DXE_SMM_DRIVER]
DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
!endif
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/SmmCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
!if $(SOURCE_DEBUG_ENABLE) == TRUE
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgentLib.inf
!endif
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index 1ef82cafe4aa..c8708c90f695 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -241,6 +241,7 @@ [LibraryClasses.common.SEC]
PeiServicesTablePointerLib|MdePkg/Library/PeiServicesTablePointerLibIdt/PeiServicesTablePointerLibIdt.inf
MemoryAllocationLib|MdePkg/Library/PeiMemoryAllocationLib/PeiMemoryAllocationLib.inf
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
[LibraryClasses.common.PEI_CORE]
HobLib|MdePkg/Library/PeiHobLib/PeiHobLib.inf
@@ -279,6 +280,7 @@ [LibraryClasses.common.PEIM]
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/SecPeiDebugAgentLib.inf
!endif
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
MpInitLib|UefiCpuPkg/Library/MpInitLib/PeiMpInitLib.inf
QemuFwCfgS3Lib|OvmfPkg/Library/QemuFwCfgS3Lib/PeiQemuFwCfgS3LibFwCfg.inf
PcdLib|MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
@@ -304,6 +306,7 @@ [LibraryClasses.common.DXE_CORE]
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgentLib.inf
!endif
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
[LibraryClasses.common.DXE_RUNTIME_DRIVER]
@@ -354,6 +357,7 @@ [LibraryClasses.common.DXE_DRIVER]
PlatformBmPrintScLib|OvmfPkg/Library/PlatformBmPrintScLib/PlatformBmPrintScLib.inf
QemuBootOrderLib|OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.inf
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
!if $(SMM_REQUIRE) == TRUE
LockBoxLib|MdeModulePkg/Library/SmmLockBoxLib/SmmLockBoxDxeLib.inf
!else
@@ -397,6 +401,7 @@ [LibraryClasses.common.DXE_SMM_DRIVER]
DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
!endif
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/SmmCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
!if $(SOURCE_DEBUG_ENABLE) == TRUE
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgentLib.inf
!endif
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index 232815c08e11..85f817b86130 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -241,6 +241,7 @@ [LibraryClasses.common.SEC]
PeiServicesTablePointerLib|MdePkg/Library/PeiServicesTablePointerLibIdt/PeiServicesTablePointerLibIdt.inf
MemoryAllocationLib|MdePkg/Library/PeiMemoryAllocationLib/PeiMemoryAllocationLib.inf
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
[LibraryClasses.common.PEI_CORE]
HobLib|MdePkg/Library/PeiHobLib/PeiHobLib.inf
@@ -279,6 +280,7 @@ [LibraryClasses.common.PEIM]
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/SecPeiDebugAgentLib.inf
!endif
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
MpInitLib|UefiCpuPkg/Library/MpInitLib/PeiMpInitLib.inf
QemuFwCfgS3Lib|OvmfPkg/Library/QemuFwCfgS3Lib/PeiQemuFwCfgS3LibFwCfg.inf
PcdLib|MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
@@ -304,6 +306,7 @@ [LibraryClasses.common.DXE_CORE]
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgentLib.inf
!endif
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
[LibraryClasses.common.DXE_RUNTIME_DRIVER]
@@ -354,6 +357,7 @@ [LibraryClasses.common.DXE_DRIVER]
PlatformBmPrintScLib|OvmfPkg/Library/PlatformBmPrintScLib/PlatformBmPrintScLib.inf
QemuBootOrderLib|OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.inf
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
!if $(SMM_REQUIRE) == TRUE
LockBoxLib|MdeModulePkg/Library/SmmLockBoxLib/SmmLockBoxDxeLib.inf
!else
@@ -397,6 +401,7 @@ [LibraryClasses.common.DXE_SMM_DRIVER]
DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
!endif
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/SmmCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
!if $(SOURCE_DEBUG_ENABLE) == TRUE
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgentLib.inf
!endif
diff --git a/UefiPayloadPkg/UefiPayloadPkgIa32.dsc b/UefiPayloadPkg/UefiPayloadPkgIa32.dsc
index 11cf17ca0647..8428da45a45a 100644
--- a/UefiPayloadPkg/UefiPayloadPkgIa32.dsc
+++ b/UefiPayloadPkg/UefiPayloadPkgIa32.dsc
@@ -233,6 +233,7 @@ [LibraryClasses.common.DXE_CORE]
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgentLib.inf
!endif
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
[LibraryClasses.common.DXE_DRIVER]
PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -244,6 +245,7 @@ [LibraryClasses.common.DXE_DRIVER]
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgentLib.inf
!endif
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
MpInitLib|UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf
[LibraryClasses.common.DXE_RUNTIME_DRIVER]
diff --git a/UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc b/UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc
index 5b7994a62cda..b88aa8ede04f 100644
--- a/UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc
+++ b/UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc
@@ -233,6 +233,7 @@ [LibraryClasses.common.DXE_CORE]
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgentLib.inf
!endif
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
[LibraryClasses.common.DXE_DRIVER]
PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -244,6 +245,7 @@ [LibraryClasses.common.DXE_DRIVER]
DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgentLib.inf
!endif
CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
+ VmgExitLib|UefiCpuPkg/Library/VmgExitLib/VmgExitLib.inf
MpInitLib|UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf
[LibraryClasses.common.DXE_RUNTIME_DRIVER]
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf b/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
index e41383573043..dc328e230de3 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
@@ -26,17 +26,21 @@ [Sources.Ia32]
Ia32/ExceptionTssEntryAsm.nasm
Ia32/ArchExceptionHandler.c
Ia32/ArchInterruptDefs.h
+ Ia32/AMDSevVcCommon.c
[Sources.X64]
X64/ExceptionHandlerAsm.nasm
X64/ArchExceptionHandler.c
X64/ArchInterruptDefs.h
+ X64/AMDSevVcCommon.c
[Sources.common]
CpuExceptionCommon.h
CpuExceptionCommon.c
PeiDxeSmmCpuException.c
DxeException.c
+ PeiDxeAMDSevVcHandler.c
+ AMDSevVcCommon.h
[Pcd]
gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard
@@ -57,3 +61,4 @@ [LibraryClasses]
PeCoffGetEntryPointLib
MemoryAllocationLib
DebugLib
+ VmgExitLib
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuExceptionHandlerLib.inf b/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuExceptionHandlerLib.inf
index f31423ac0f91..37dbbdb35711 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuExceptionHandlerLib.inf
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuExceptionHandlerLib.inf
@@ -26,17 +26,21 @@ [Sources.Ia32]
Ia32/ExceptionTssEntryAsm.nasm
Ia32/ArchExceptionHandler.c
Ia32/ArchInterruptDefs.h
+ Ia32/AMDSevVcCommon.c
[Sources.X64]
X64/ExceptionHandlerAsm.nasm
X64/ArchExceptionHandler.c
X64/ArchInterruptDefs.h
+ X64/AMDSevVcCommon.c
[Sources.common]
CpuExceptionCommon.h
CpuExceptionCommon.c
PeiCpuException.c
PeiDxeSmmCpuException.c
+ PeiDxeAMDSevVcHandler.c
+ AMDSevVcCommon.h
[Packages]
MdePkg/MdePkg.dec
@@ -52,6 +56,7 @@ [LibraryClasses]
HobLib
MemoryAllocationLib
SynchronizationLib
+ VmgExitLib
[Pcd]
gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard # CONSUMES
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuExceptionHandlerLib.inf b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuExceptionHandlerLib.inf
index 6d25cafe2ca3..28b9a78c6be5 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuExceptionHandlerLib.inf
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuExceptionHandlerLib.inf
@@ -26,16 +26,20 @@ [Sources.Ia32]
Ia32/ExceptionTssEntryAsm.nasm
Ia32/ArchExceptionHandler.c
Ia32/ArchInterruptDefs.h
+ Ia32/AMDSevVcCommon.c
[Sources.X64]
X64/ExceptionHandlerAsm.nasm
X64/ArchExceptionHandler.c
X64/ArchInterruptDefs.h
+ X64/AMDSevVcCommon.c
[Sources.common]
CpuExceptionCommon.h
CpuExceptionCommon.c
SecPeiCpuException.c
+ SecAMDSevVcHandler.c
+ AMDSevVcCommon.h
[Packages]
MdePkg/MdePkg.dec
@@ -48,3 +52,7 @@ [LibraryClasses]
PrintLib
LocalApicLib
PeCoffGetEntryPointLib
+ VmgExitLib
+
+[Pcd]
+ gEfiMdeModulePkgTokenSpaceGuid.PcdSecGhcbBase
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/AMDSevVcCommon.h b/UefiCpuPkg/Library/CpuExceptionHandlerLib/AMDSevVcCommon.h
new file mode 100644
index 000000000000..c0a2ecd17d4c
--- /dev/null
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/AMDSevVcCommon.h
@@ -0,0 +1,26 @@
+/** @file
+ Common header file for SEV-ES #VC Exception Handler Support.
+
+ Copyright (c) 2019, Advanced Micro Devices, Inc. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _AMD_SEV_VC_COMMON_H_
+#define _AMD_SEV_VC_COMMON_H_
+
+#include <Protocol/DebugSupport.h>
+#include <Register/Amd/Ghcb.h>
+
+UINTN
+DoVcException(
+ EFI_SYSTEM_CONTEXT Context
+ );
+
+UINTN
+DoVcCommon(
+ GHCB *Ghcb,
+ EFI_SYSTEM_CONTEXT Context
+ );
+
+#endif
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.h b/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.h
index 805dd9cbb4ff..0f274e7ea328 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.h
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.h
@@ -24,6 +24,8 @@
#define CPU_INTERRUPT_NUM 256
#define HOOKAFTER_STUB_SIZE 16
+#define VC_EXCEPTION 29
+
//
// Exception Error Code of Page-Fault Exception
//
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.c
index 8adbd43fefb4..39e4dd9e9417 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.c
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.c
@@ -14,7 +14,7 @@
//
// 1 means an error code will be pushed, otherwise 0
//
-CONST UINT32 mErrorCodeFlag = 0x00227d00;
+CONST UINT32 mErrorCodeFlag = 0x20227d00;
//
// Define the maximum message length
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/AMDSevVcCommon.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/AMDSevVcCommon.c
new file mode 100644
index 000000000000..595d9c2ba04e
--- /dev/null
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/AMDSevVcCommon.c
@@ -0,0 +1,20 @@
+/** @file
+ IA32 SEV-ES #VC Exception Handler functons.
+
+ Copyright (c) 2019, Advanced Micro Devices, Inc. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include "AMDSevVcCommon.h"
+
+UINTN
+DoVcCommon (
+ GHCB *Ghcb,
+ EFI_SYSTEM_CONTEXT Context
+ )
+{
+ return GP_EXCEPTION;
+}
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeAMDSevVcHandler.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeAMDSevVcHandler.c
new file mode 100644
index 000000000000..68baaa7c6a89
--- /dev/null
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeAMDSevVcHandler.c
@@ -0,0 +1,29 @@
+/** @file
+ PEI and DXE SEV-ES #VC Exception Handler functons.
+
+ Copyright (c) 2019, Advanced Micro Devices, Inc. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Register/Amd/Msr.h>
+#include "CpuExceptionCommon.h"
+#include "AMDSevVcCommon.h"
+
+UINTN
+DoVcException (
+ EFI_SYSTEM_CONTEXT Context
+ )
+{
+ MSR_SEV_ES_GHCB_REGISTER Msr;
+ GHCB *Ghcb;
+
+ Msr.GhcbPhysicalAddress = AsmReadMsr64 (MSR_SEV_ES_GHCB);
+ ASSERT(Msr.Bits.GhcbNegotiateBit == FALSE);
+
+ Ghcb = Msr.Ghcb;
+
+ return DoVcCommon (Ghcb, Context);
+}
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeSmmCpuException.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeSmmCpuException.c
index 72c2aeca4c13..0c248e7eb904 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeSmmCpuException.c
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeSmmCpuException.c
@@ -7,6 +7,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "CpuExceptionCommon.h"
+#include "AMDSevVcCommon.h"
#include <Library/DebugLib.h>
/**
@@ -86,6 +87,21 @@ CommonExceptionHandlerWorker (
break;
}
+ if (ExceptionType == VC_EXCEPTION) {
+ UINTN Status;
+ //
+ // #VC must be handled for an SEV-ES guest
+ //
+ Status = DoVcException(SystemContext);
+ if (Status) {
+ // Exception not handled - Status contains the desired exception now
+ ExceptionType = Status;
+ } else {
+ // Exception handled
+ return;
+ }
+ }
+
if (ExternalInterruptHandler != NULL &&
ExternalInterruptHandler[ExceptionType] != NULL) {
(ExternalInterruptHandler[ExceptionType]) (ExceptionType, SystemContext);
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecAMDSevVcHandler.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecAMDSevVcHandler.c
new file mode 100644
index 000000000000..a68b178d2236
--- /dev/null
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecAMDSevVcHandler.c
@@ -0,0 +1,50 @@
+/** @file
+ SEC SEV-ES #VC Exception Handler functons.
+
+ Copyright (c) 2019, Advanced Micro Devices, Inc. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseLib.h>
+#include <Register/Amd/Msr.h>
+#include "CpuExceptionCommon.h"
+#include "AMDSevVcCommon.h"
+
+
+UINTN
+DoVcException(
+ EFI_SYSTEM_CONTEXT Context
+ )
+{
+ MSR_SEV_ES_GHCB_REGISTER Msr;
+ GHCB *Ghcb;
+
+ Msr.GhcbPhysicalAddress = AsmReadMsr64 (MSR_SEV_ES_GHCB);
+ Ghcb = Msr.Ghcb;
+
+ if (Msr.Bits.GhcbNegotiateBit) {
+ if (Msr.GhcbProtocol.SevEsProtocolMin > Msr.GhcbProtocol.SevEsProtocolMax) {
+ ASSERT (0);
+ return GP_EXCEPTION;
+ }
+
+ if ((Msr.GhcbProtocol.SevEsProtocolMin > GHCB_VERSION_MAX) ||
+ (Msr.GhcbProtocol.SevEsProtocolMax < GHCB_VERSION_MIN)) {
+ ASSERT (0);
+ return GP_EXCEPTION;
+ }
+
+ Msr.GhcbPhysicalAddress = FixedPcdGet32 (PcdSecGhcbBase);
+ AsmWriteMsr64(MSR_SEV_ES_GHCB, Msr.GhcbPhysicalAddress);
+
+ Ghcb = Msr.Ghcb;
+ SetMem (Ghcb, sizeof (*Ghcb), 0);
+
+ /* Set the version to the maximum that can be supported */
+ Ghcb->ProtocolVersion = MIN (Msr.GhcbProtocol.SevEsProtocolMax, GHCB_VERSION_MAX);
+ Ghcb->GhcbUsage = GHCB_STANDARD_USAGE;
+ }
+
+ return DoVcCommon(Ghcb, Context);
+}
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c
index 20148db74cf8..998a90ba61a6 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c
@@ -8,6 +8,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
#include <PiPei.h>
#include "CpuExceptionCommon.h"
+#include "AMDSevVcCommon.h"
CONST UINTN mDoFarReturnFlag = 0;
@@ -24,6 +25,21 @@ CommonExceptionHandler (
IN EFI_SYSTEM_CONTEXT SystemContext
)
{
+ if (ExceptionType == VC_EXCEPTION) {
+ UINTN Status;
+ //
+ // #VC must be handled for an SEV-ES guest
+ //
+ Status = DoVcException(SystemContext);
+ if (Status) {
+ // Exception not handled - Status contains the desired exception now
+ ExceptionType = Status;
+ } else {
+ // Exception handled
+ return;
+ }
+ }
+
//
// Initialize the serial port before dumping.
//
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c
new file mode 100644
index 000000000000..4b56767f9374
--- /dev/null
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c
@@ -0,0 +1,35 @@
+/** @file
+ X64 SEV-ES #VC Exception Handler functons.
+
+ Copyright (c) 2019, Advanced Micro Devices, Inc. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/VmgExitLib.h>
+#include "AMDSevVcCommon.h"
+
+UINTN
+DoVcCommon (
+ GHCB *Ghcb,
+ EFI_SYSTEM_CONTEXT Context
+ )
+{
+ EFI_SYSTEM_CONTEXT_X64 *Regs = Context.SystemContextX64;
+ UINTN ExitCode;
+ UINTN Status;
+
+ VmgInit (Ghcb);
+
+ ExitCode = Regs->ExceptionData;
+ switch (ExitCode) {
+ default:
+ Status = VmgExit (Ghcb, SvmExitUnsupported, ExitCode, 0);
+ }
+
+ VmgDone (Ghcb);
+
+ return Status;
+}
--
2.17.1
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