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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2020-08-12 15:21:37 -0500 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-08-17 02:46:39 +0000 |
| commit | fb040cced3b68f6a5ea88ec9881b362346d71c22 (patch) | |
| tree | e07ed76e9e0bd6a8ab3369ea7df3e51ad8fa3518 /OvmfPkg/Include/IndustryStandard | |
| parent | 61bacc0fa16fd6f595a2c4222425cb6286e19977 (diff) | |
| download | edk2-fb040cced3b68f6a5ea88ec9881b362346d71c22.tar.gz edk2-fb040cced3b68f6a5ea88ec9881b362346d71c22.tar.bz2 edk2-fb040cced3b68f6a5ea88ec9881b362346d71c22.zip | |
OvmfPkg/VmgExitLib: Add support for IOIO_PROT NAE events
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198
Under SEV-ES, a IOIO_PROT intercept generates a #VC exception. VMGEXIT
must be used to allow the hypervisor to handle this intercept.
Add support to construct the required GHCB values to support a IOIO_PROT
NAE event. Parse the instruction that generated the #VC exception,
setting the required register values in the GHCB and creating the proper
SW_EXITINFO1 value in the GHCB.
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'OvmfPkg/Include/IndustryStandard')
| -rw-r--r-- | OvmfPkg/Include/IndustryStandard/InstructionParsing.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/OvmfPkg/Include/IndustryStandard/InstructionParsing.h b/OvmfPkg/Include/IndustryStandard/InstructionParsing.h new file mode 100644 index 0000000000..149ff328e0 --- /dev/null +++ b/OvmfPkg/Include/IndustryStandard/InstructionParsing.h @@ -0,0 +1,83 @@ +/** @file
+ Instruction parsing support definitions.
+
+ Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef __INSTRUCTION_PARSING_H__
+#define __INSTRUCTION_PARSING_H__
+
+#include <Base.h>
+#include <Uefi.h>
+
+//
+// Instruction REX prefix definition
+//
+typedef union {
+ struct {
+ UINT8 BitB:1;
+ UINT8 BitX:1;
+ UINT8 BitR:1;
+ UINT8 BitW:1;
+ UINT8 Rex:4;
+ } Bits;
+
+ UINT8 Uint8;
+} INSTRUCTION_REX_PREFIX;
+
+//
+// Instruction ModRM definition
+//
+typedef union {
+ struct {
+ UINT8 Rm:3;
+ UINT8 Reg:3;
+ UINT8 Mod:2;
+ } Bits;
+
+ UINT8 Uint8;
+} INSTRUCTION_MODRM;
+
+//
+// Instruction SIB definition
+//
+typedef union {
+ struct {
+ UINT8 Base:3;
+ UINT8 Index:3;
+ UINT8 Scale:2;
+ } Bits;
+
+ UINT8 Uint8;
+} INSTRUCTION_SIB;
+
+//
+// Legacy Instruction Prefixes
+//
+#define OVERRIDE_SEGMENT_CS 0x2E
+#define OVERRIDE_SEGMENT_DS 0x3E
+#define OVERRIDE_SEGMENT_ES 0x26
+#define OVERRIDE_SEGMENT_SS 0x36
+#define OVERRIDE_SEGMENT_FS 0x64
+#define OVERRIDE_SEGMENT_GS 0x65
+#define OVERRIDE_OPERAND_SIZE 0x66
+#define OVERRIDE_ADDRESS_SIZE 0x67
+#define LOCK_PREFIX 0xF0
+#define REPNZ_PREFIX 0xF2
+#define REPZ_PREFIX 0xF3
+
+//
+// REX Prefixes
+//
+#define REX_PREFIX_START 0x40
+#define REX_PREFIX_STOP 0x4F
+#define REX_64BIT_OPERAND_SIZE_MASK 0x08
+
+//
+// Two-byte Opcode Flag
+//
+#define TWO_BYTE_OPCODE_ESCAPE 0x0F
+
+#endif
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