[edk2-devel] [PATCH v11 8/8] OvmfPkg: Uses MmSaveStateLib library
Abdul Lateef Attar via groups.io
abdattar=amd.com at groups.io
Sat May 6 04:07:04 UTC 2023
From: Abdul Lateef Attar <AbdulLateef.Attar at amd.com>
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4182
Uses new MmSaveStateLib library instance.
Cc: Paul Grimes <paul.grimes at amd.com>
Cc: Abner Chang <abner.chang at amd.com>
Cc: Eric Dong <eric.dong at intel.com>
Cc: Ray Ni <ray.ni at intel.com>
Cc: Rahul Kumar <rahul1.kumar at intel.com>
Cc: Gerd Hoffmann <kraxel at redhat.com>
Cc: Ard Biesheuvel <ardb+tianocore at kernel.org>
Cc: Jiewen Yao <jiewen.yao at intel.com>
Cc: Jordan Justen <jordan.l.justen at intel.com>
Signed-off-by: Abdul Lateef Attar <abdattar at amd.com>
---
OvmfPkg/OvmfPkgIa32.dsc | 1 +
OvmfPkg/OvmfPkgIa32X64.dsc | 3 +
OvmfPkg/OvmfPkgX64.dsc | 1 +
.../SmmCpuFeaturesLib/SmmCpuFeaturesLib.c | 767 ------------------
4 files changed, 5 insertions(+), 767 deletions(-)
diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
index e333b8b41803..86fc9f6174b2 100644
--- a/OvmfPkg/OvmfPkgIa32.dsc
+++ b/OvmfPkg/OvmfPkgIa32.dsc
@@ -972,6 +972,7 @@ [Components]
<LibraryClasses>
SmmCpuPlatformHookLib|OvmfPkg/Library/SmmCpuPlatformHookLibQemu/SmmCpuPlatformHookLibQemu.inf
SmmCpuFeaturesLib|OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.inf
+ MmSaveStateLib|UefiCpuPkg/Library/MmSaveStateLib/AmdMmSaveStateLib.inf
}
#
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index 25974230a27e..da5fd7042f4f 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -4,6 +4,7 @@
# Copyright (c) 2006 - 2023, Intel Corporation. All rights reserved.<BR>
# (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
# Copyright (c) Microsoft Corporation.
+# Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -444,6 +445,7 @@ [LibraryClasses.common.DXE_SMM_DRIVER]
BaseCryptLib|CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf
PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
SmmCpuRendezvousLib|UefiCpuPkg/Library/SmmCpuRendezvousLib/SmmCpuRendezvousLib.inf
+ MmSaveStateLib|UefiCpuPkg/Library/MmSaveStateLib/AmdMmSaveStateLib.inf
[LibraryClasses.common.SMM_CORE]
PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -990,6 +992,7 @@ [Components.X64]
<LibraryClasses>
SmmCpuPlatformHookLib|OvmfPkg/Library/SmmCpuPlatformHookLibQemu/SmmCpuPlatformHookLibQemu.inf
SmmCpuFeaturesLib|OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.inf
+ MmSaveStateLib|UefiCpuPkg/Library/MmSaveStateLib/AmdMmSaveStateLib.inf
}
#
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index c1762ffca445..ae706a5099c5 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -1066,6 +1066,7 @@ [Components]
<LibraryClasses>
SmmCpuPlatformHookLib|OvmfPkg/Library/SmmCpuPlatformHookLibQemu/SmmCpuPlatformHookLibQemu.inf
SmmCpuFeaturesLib|OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.inf
+ MmSaveStateLib|UefiCpuPkg/Library/MmSaveStateLib/AmdMmSaveStateLib.inf
}
#
diff --git a/OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c b/OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c
index a009123dae88..4c354bafe42f 100644
--- a/OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c
+++ b/OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c
@@ -578,773 +578,6 @@ SmmCpuFeaturesSetSmmRegister (
ASSERT (FALSE);
}
-///
-/// Macro used to simplify the lookup table entries of type
-/// CPU_SMM_SAVE_STATE_LOOKUP_ENTRY
-///
-#define SMM_CPU_OFFSET(Field) OFFSET_OF (QEMU_SMRAM_SAVE_STATE_MAP, Field)
-
-///
-/// Macro used to simplify the lookup table entries of type
-/// CPU_SMM_SAVE_STATE_REGISTER_RANGE
-///
-#define SMM_REGISTER_RANGE(Start, End) { Start, End, End - Start + 1 }
-
-///
-/// Structure used to describe a range of registers
-///
-typedef struct {
- EFI_SMM_SAVE_STATE_REGISTER Start;
- EFI_SMM_SAVE_STATE_REGISTER End;
- UINTN Length;
-} CPU_SMM_SAVE_STATE_REGISTER_RANGE;
-
-///
-/// Structure used to build a lookup table to retrieve the widths and offsets
-/// associated with each supported EFI_SMM_SAVE_STATE_REGISTER value
-///
-
-#define SMM_SAVE_STATE_REGISTER_FIRST_INDEX 1
-
-typedef struct {
- UINT8 Width32;
- UINT8 Width64;
- UINT16 Offset32;
- UINT16 Offset64Lo;
- UINT16 Offset64Hi;
- BOOLEAN Writeable;
-} CPU_SMM_SAVE_STATE_LOOKUP_ENTRY;
-
-///
-/// Table used by GetRegisterIndex() to convert an EFI_SMM_SAVE_STATE_REGISTER
-/// value to an index into a table of type CPU_SMM_SAVE_STATE_LOOKUP_ENTRY
-///
-STATIC CONST CPU_SMM_SAVE_STATE_REGISTER_RANGE mSmmCpuRegisterRanges[] = {
- SMM_REGISTER_RANGE (
- EFI_SMM_SAVE_STATE_REGISTER_GDTBASE,
- EFI_SMM_SAVE_STATE_REGISTER_LDTINFO
- ),
- SMM_REGISTER_RANGE (
- EFI_SMM_SAVE_STATE_REGISTER_ES,
- EFI_SMM_SAVE_STATE_REGISTER_RIP
- ),
- SMM_REGISTER_RANGE (
- EFI_SMM_SAVE_STATE_REGISTER_RFLAGS,
- EFI_SMM_SAVE_STATE_REGISTER_CR4
- ),
- { (EFI_SMM_SAVE_STATE_REGISTER)0, (EFI_SMM_SAVE_STATE_REGISTER)0,0 }
-};
-
-///
-/// Lookup table used to retrieve the widths and offsets associated with each
-/// supported EFI_SMM_SAVE_STATE_REGISTER value
-///
-STATIC CONST CPU_SMM_SAVE_STATE_LOOKUP_ENTRY mSmmCpuWidthOffset[] = {
- {
- 0, // Width32
- 0, // Width64
- 0, // Offset32
- 0, // Offset64Lo
- 0, // Offset64Hi
- FALSE // Writeable
- }, // Reserved
-
- //
- // CPU Save State registers defined in PI SMM CPU Protocol.
- //
- {
- 0, // Width32
- 8, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._GDTRBase), // Offset64Lo
- SMM_CPU_OFFSET (x64._GDTRBase) + 4, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_GDTBASE = 4
-
- {
- 0, // Width32
- 8, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._IDTRBase), // Offset64Lo
- SMM_CPU_OFFSET (x64._IDTRBase) + 4, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_IDTBASE = 5
-
- {
- 0, // Width32
- 8, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._LDTRBase), // Offset64Lo
- SMM_CPU_OFFSET (x64._LDTRBase) + 4, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_LDTBASE = 6
-
- {
- 0, // Width32
- 0, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._GDTRLimit), // Offset64Lo
- SMM_CPU_OFFSET (x64._GDTRLimit) + 4, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_GDTLIMIT = 7
-
- {
- 0, // Width32
- 0, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._IDTRLimit), // Offset64Lo
- SMM_CPU_OFFSET (x64._IDTRLimit) + 4, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_IDTLIMIT = 8
-
- {
- 0, // Width32
- 0, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._LDTRLimit), // Offset64Lo
- SMM_CPU_OFFSET (x64._LDTRLimit) + 4, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_LDTLIMIT = 9
-
- {
- 0, // Width32
- 0, // Width64
- 0, // Offset32
- 0, // Offset64Lo
- 0 + 4, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_LDTINFO = 10
-
- {
- 4, // Width32
- 4, // Width64
- SMM_CPU_OFFSET (x86._ES), // Offset32
- SMM_CPU_OFFSET (x64._ES), // Offset64Lo
- 0, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_ES = 20
-
- {
- 4, // Width32
- 4, // Width64
- SMM_CPU_OFFSET (x86._CS), // Offset32
- SMM_CPU_OFFSET (x64._CS), // Offset64Lo
- 0, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_CS = 21
-
- {
- 4, // Width32
- 4, // Width64
- SMM_CPU_OFFSET (x86._SS), // Offset32
- SMM_CPU_OFFSET (x64._SS), // Offset64Lo
- 0, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_SS = 22
-
- {
- 4, // Width32
- 4, // Width64
- SMM_CPU_OFFSET (x86._DS), // Offset32
- SMM_CPU_OFFSET (x64._DS), // Offset64Lo
- 0, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_DS = 23
-
- {
- 4, // Width32
- 4, // Width64
- SMM_CPU_OFFSET (x86._FS), // Offset32
- SMM_CPU_OFFSET (x64._FS), // Offset64Lo
- 0, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_FS = 24
-
- {
- 4, // Width32
- 4, // Width64
- SMM_CPU_OFFSET (x86._GS), // Offset32
- SMM_CPU_OFFSET (x64._GS), // Offset64Lo
- 0, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_GS = 25
-
- {
- 0, // Width32
- 4, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._LDTR), // Offset64Lo
- 0, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_LDTR_SEL = 26
-
- {
- 4, // Width32
- 4, // Width64
- SMM_CPU_OFFSET (x86._TR), // Offset32
- SMM_CPU_OFFSET (x64._TR), // Offset64Lo
- 0, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_TR_SEL = 27
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._DR7), // Offset32
- SMM_CPU_OFFSET (x64._DR7), // Offset64Lo
- SMM_CPU_OFFSET (x64._DR7) + 4, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_DR7 = 28
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._DR6), // Offset32
- SMM_CPU_OFFSET (x64._DR6), // Offset64Lo
- SMM_CPU_OFFSET (x64._DR6) + 4, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_DR6 = 29
-
- {
- 0, // Width32
- 8, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._R8), // Offset64Lo
- SMM_CPU_OFFSET (x64._R8) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_R8 = 30
-
- {
- 0, // Width32
- 8, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._R9), // Offset64Lo
- SMM_CPU_OFFSET (x64._R9) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_R9 = 31
-
- {
- 0, // Width32
- 8, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._R10), // Offset64Lo
- SMM_CPU_OFFSET (x64._R10) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_R10 = 32
-
- {
- 0, // Width32
- 8, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._R11), // Offset64Lo
- SMM_CPU_OFFSET (x64._R11) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_R11 = 33
-
- {
- 0, // Width32
- 8, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._R12), // Offset64Lo
- SMM_CPU_OFFSET (x64._R12) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_R12 = 34
-
- {
- 0, // Width32
- 8, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._R13), // Offset64Lo
- SMM_CPU_OFFSET (x64._R13) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_R13 = 35
-
- {
- 0, // Width32
- 8, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._R14), // Offset64Lo
- SMM_CPU_OFFSET (x64._R14) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_R14 = 36
-
- {
- 0, // Width32
- 8, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._R15), // Offset64Lo
- SMM_CPU_OFFSET (x64._R15) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_R15 = 37
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._EAX), // Offset32
- SMM_CPU_OFFSET (x64._RAX), // Offset64Lo
- SMM_CPU_OFFSET (x64._RAX) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_RAX = 38
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._EBX), // Offset32
- SMM_CPU_OFFSET (x64._RBX), // Offset64Lo
- SMM_CPU_OFFSET (x64._RBX) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_RBX = 39
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._ECX), // Offset32
- SMM_CPU_OFFSET (x64._RCX), // Offset64Lo
- SMM_CPU_OFFSET (x64._RCX) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_RCX = 40
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._EDX), // Offset32
- SMM_CPU_OFFSET (x64._RDX), // Offset64Lo
- SMM_CPU_OFFSET (x64._RDX) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_RDX = 41
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._ESP), // Offset32
- SMM_CPU_OFFSET (x64._RSP), // Offset64Lo
- SMM_CPU_OFFSET (x64._RSP) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_RSP = 42
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._EBP), // Offset32
- SMM_CPU_OFFSET (x64._RBP), // Offset64Lo
- SMM_CPU_OFFSET (x64._RBP) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_RBP = 43
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._ESI), // Offset32
- SMM_CPU_OFFSET (x64._RSI), // Offset64Lo
- SMM_CPU_OFFSET (x64._RSI) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_RSI = 44
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._EDI), // Offset32
- SMM_CPU_OFFSET (x64._RDI), // Offset64Lo
- SMM_CPU_OFFSET (x64._RDI) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_RDI = 45
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._EIP), // Offset32
- SMM_CPU_OFFSET (x64._RIP), // Offset64Lo
- SMM_CPU_OFFSET (x64._RIP) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_RIP = 46
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._EFLAGS), // Offset32
- SMM_CPU_OFFSET (x64._RFLAGS), // Offset64Lo
- SMM_CPU_OFFSET (x64._RFLAGS) + 4, // Offset64Hi
- TRUE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_RFLAGS = 51
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._CR0), // Offset32
- SMM_CPU_OFFSET (x64._CR0), // Offset64Lo
- SMM_CPU_OFFSET (x64._CR0) + 4, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_CR0 = 52
-
- {
- 4, // Width32
- 8, // Width64
- SMM_CPU_OFFSET (x86._CR3), // Offset32
- SMM_CPU_OFFSET (x64._CR3), // Offset64Lo
- SMM_CPU_OFFSET (x64._CR3) + 4, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_CR3 = 53
-
- {
- 0, // Width32
- 4, // Width64
- 0, // Offset32
- SMM_CPU_OFFSET (x64._CR4), // Offset64Lo
- SMM_CPU_OFFSET (x64._CR4) + 4, // Offset64Hi
- FALSE // Writeable
- }, // EFI_SMM_SAVE_STATE_REGISTER_CR4 = 54
-};
-
-//
-// No support for I/O restart
-//
-
-/**
- Read information from the CPU save state.
-
- @param Register Specifies the CPU register to read form the save state.
-
- @retval 0 Register is not valid
- @retval >0 Index into mSmmCpuWidthOffset[] associated with Register
-
-**/
-STATIC
-UINTN
-GetRegisterIndex (
- IN EFI_SMM_SAVE_STATE_REGISTER Register
- )
-{
- UINTN Index;
- UINTN Offset;
-
- for (Index = 0, Offset = SMM_SAVE_STATE_REGISTER_FIRST_INDEX;
- mSmmCpuRegisterRanges[Index].Length != 0;
- Index++)
- {
- if ((Register >= mSmmCpuRegisterRanges[Index].Start) &&
- (Register <= mSmmCpuRegisterRanges[Index].End))
- {
- return Register - mSmmCpuRegisterRanges[Index].Start + Offset;
- }
-
- Offset += mSmmCpuRegisterRanges[Index].Length;
- }
-
- return 0;
-}
-
-/**
- Read a CPU Save State register on the target processor.
-
- This function abstracts the differences that whether the CPU Save State
- register is in the IA32 CPU Save State Map or X64 CPU Save State Map.
-
- This function supports reading a CPU Save State register in SMBase relocation
- handler.
-
- @param[in] CpuIndex Specifies the zero-based index of the CPU save
- state.
- @param[in] RegisterIndex Index into mSmmCpuWidthOffset[] look up table.
- @param[in] Width The number of bytes to read from the CPU save
- state.
- @param[out] Buffer Upon return, this holds the CPU register value
- read from the save state.
-
- @retval EFI_SUCCESS The register was read from Save State.
- @retval EFI_NOT_FOUND The register is not defined for the Save State
- of Processor.
- @retval EFI_INVALID_PARAMTER This or Buffer is NULL.
-
-**/
-STATIC
-EFI_STATUS
-ReadSaveStateRegisterByIndex (
- IN UINTN CpuIndex,
- IN UINTN RegisterIndex,
- IN UINTN Width,
- OUT VOID *Buffer
- )
-{
- QEMU_SMRAM_SAVE_STATE_MAP *CpuSaveState;
-
- CpuSaveState = (QEMU_SMRAM_SAVE_STATE_MAP *)gSmst->CpuSaveState[CpuIndex];
-
- if ((CpuSaveState->x86.SMMRevId & 0xFFFF) == 0) {
- //
- // If 32-bit mode width is zero, then the specified register can not be
- // accessed
- //
- if (mSmmCpuWidthOffset[RegisterIndex].Width32 == 0) {
- return EFI_NOT_FOUND;
- }
-
- //
- // If Width is bigger than the 32-bit mode width, then the specified
- // register can not be accessed
- //
- if (Width > mSmmCpuWidthOffset[RegisterIndex].Width32) {
- return EFI_INVALID_PARAMETER;
- }
-
- //
- // Write return buffer
- //
- ASSERT (CpuSaveState != NULL);
- CopyMem (
- Buffer,
- (UINT8 *)CpuSaveState + mSmmCpuWidthOffset[RegisterIndex].Offset32,
- Width
- );
- } else {
- //
- // If 64-bit mode width is zero, then the specified register can not be
- // accessed
- //
- if (mSmmCpuWidthOffset[RegisterIndex].Width64 == 0) {
- return EFI_NOT_FOUND;
- }
-
- //
- // If Width is bigger than the 64-bit mode width, then the specified
- // register can not be accessed
- //
- if (Width > mSmmCpuWidthOffset[RegisterIndex].Width64) {
- return EFI_INVALID_PARAMETER;
- }
-
- //
- // Write lower 32-bits of return buffer
- //
- CopyMem (
- Buffer,
- (UINT8 *)CpuSaveState + mSmmCpuWidthOffset[RegisterIndex].Offset64Lo,
- MIN (4, Width)
- );
- if (Width >= 4) {
- //
- // Write upper 32-bits of return buffer
- //
- CopyMem (
- (UINT8 *)Buffer + 4,
- (UINT8 *)CpuSaveState + mSmmCpuWidthOffset[RegisterIndex].Offset64Hi,
- Width - 4
- );
- }
- }
-
- return EFI_SUCCESS;
-}
-
-/**
- Read an SMM Save State register on the target processor. If this function
- returns EFI_UNSUPPORTED, then the caller is responsible for reading the
- SMM Save Sate register.
-
- @param[in] CpuIndex The index of the CPU to read the SMM Save State. The
- value must be between 0 and the NumberOfCpus field in
- the System Management System Table (SMST).
- @param[in] Register The SMM Save State register to read.
- @param[in] Width The number of bytes to read from the CPU save state.
- @param[out] Buffer Upon return, this holds the CPU register value read
- from the save state.
-
- @retval EFI_SUCCESS The register was read from Save State.
- @retval EFI_INVALID_PARAMTER Buffer is NULL.
- @retval EFI_UNSUPPORTED This function does not support reading
- Register.
-**/
-EFI_STATUS
-EFIAPI
-SmmCpuFeaturesReadSaveStateRegister (
- IN UINTN CpuIndex,
- IN EFI_SMM_SAVE_STATE_REGISTER Register,
- IN UINTN Width,
- OUT VOID *Buffer
- )
-{
- UINTN RegisterIndex;
- QEMU_SMRAM_SAVE_STATE_MAP *CpuSaveState;
-
- //
- // Check for special EFI_SMM_SAVE_STATE_REGISTER_LMA
- //
- if (Register == EFI_SMM_SAVE_STATE_REGISTER_LMA) {
- //
- // Only byte access is supported for this register
- //
- if (Width != 1) {
- return EFI_INVALID_PARAMETER;
- }
-
- CpuSaveState = (QEMU_SMRAM_SAVE_STATE_MAP *)gSmst->CpuSaveState[CpuIndex];
-
- //
- // Check CPU mode
- //
- if ((CpuSaveState->x86.SMMRevId & 0xFFFF) == 0) {
- *(UINT8 *)Buffer = 32;
- } else {
- *(UINT8 *)Buffer = 64;
- }
-
- return EFI_SUCCESS;
- }
-
- //
- // Check for special EFI_SMM_SAVE_STATE_REGISTER_IO
- //
- if (Register == EFI_SMM_SAVE_STATE_REGISTER_IO) {
- return EFI_NOT_FOUND;
- }
-
- //
- // Convert Register to a register lookup table index. Let
- // PiSmmCpuDxeSmm implement other special registers (currently
- // there is only EFI_SMM_SAVE_STATE_REGISTER_PROCESSOR_ID).
- //
- RegisterIndex = GetRegisterIndex (Register);
- if (RegisterIndex == 0) {
- return (Register < EFI_SMM_SAVE_STATE_REGISTER_IO ?
- EFI_NOT_FOUND :
- EFI_UNSUPPORTED);
- }
-
- return ReadSaveStateRegisterByIndex (CpuIndex, RegisterIndex, Width, Buffer);
-}
-
-/**
- Writes an SMM Save State register on the target processor. If this function
- returns EFI_UNSUPPORTED, then the caller is responsible for writing the
- SMM Save Sate register.
-
- @param[in] CpuIndex The index of the CPU to write the SMM Save State. The
- value must be between 0 and the NumberOfCpus field in
- the System Management System Table (SMST).
- @param[in] Register The SMM Save State register to write.
- @param[in] Width The number of bytes to write to the CPU save state.
- @param[in] Buffer Upon entry, this holds the new CPU register value.
-
- @retval EFI_SUCCESS The register was written to Save State.
- @retval EFI_INVALID_PARAMTER Buffer is NULL.
- @retval EFI_UNSUPPORTED This function does not support writing
- Register.
-**/
-EFI_STATUS
-EFIAPI
-SmmCpuFeaturesWriteSaveStateRegister (
- IN UINTN CpuIndex,
- IN EFI_SMM_SAVE_STATE_REGISTER Register,
- IN UINTN Width,
- IN CONST VOID *Buffer
- )
-{
- UINTN RegisterIndex;
- QEMU_SMRAM_SAVE_STATE_MAP *CpuSaveState;
-
- //
- // Writes to EFI_SMM_SAVE_STATE_REGISTER_LMA are ignored
- //
- if (Register == EFI_SMM_SAVE_STATE_REGISTER_LMA) {
- return EFI_SUCCESS;
- }
-
- //
- // Writes to EFI_SMM_SAVE_STATE_REGISTER_IO are not supported
- //
- if (Register == EFI_SMM_SAVE_STATE_REGISTER_IO) {
- return EFI_NOT_FOUND;
- }
-
- //
- // Convert Register to a register lookup table index. Let
- // PiSmmCpuDxeSmm implement other special registers (currently
- // there is only EFI_SMM_SAVE_STATE_REGISTER_PROCESSOR_ID).
- //
- RegisterIndex = GetRegisterIndex (Register);
- if (RegisterIndex == 0) {
- return (Register < EFI_SMM_SAVE_STATE_REGISTER_IO ?
- EFI_NOT_FOUND :
- EFI_UNSUPPORTED);
- }
-
- CpuSaveState = (QEMU_SMRAM_SAVE_STATE_MAP *)gSmst->CpuSaveState[CpuIndex];
-
- //
- // Do not write non-writable SaveState, because it will cause exception.
- //
- if (!mSmmCpuWidthOffset[RegisterIndex].Writeable) {
- return EFI_UNSUPPORTED;
- }
-
- //
- // Check CPU mode
- //
- if ((CpuSaveState->x86.SMMRevId & 0xFFFF) == 0) {
- //
- // If 32-bit mode width is zero, then the specified register can not be
- // accessed
- //
- if (mSmmCpuWidthOffset[RegisterIndex].Width32 == 0) {
- return EFI_NOT_FOUND;
- }
-
- //
- // If Width is bigger than the 32-bit mode width, then the specified
- // register can not be accessed
- //
- if (Width > mSmmCpuWidthOffset[RegisterIndex].Width32) {
- return EFI_INVALID_PARAMETER;
- }
-
- //
- // Write SMM State register
- //
- ASSERT (CpuSaveState != NULL);
- CopyMem (
- (UINT8 *)CpuSaveState + mSmmCpuWidthOffset[RegisterIndex].Offset32,
- Buffer,
- Width
- );
- } else {
- //
- // If 64-bit mode width is zero, then the specified register can not be
- // accessed
- //
- if (mSmmCpuWidthOffset[RegisterIndex].Width64 == 0) {
- return EFI_NOT_FOUND;
- }
-
- //
- // If Width is bigger than the 64-bit mode width, then the specified
- // register can not be accessed
- //
- if (Width > mSmmCpuWidthOffset[RegisterIndex].Width64) {
- return EFI_INVALID_PARAMETER;
- }
-
- //
- // Write lower 32-bits of SMM State register
- //
- CopyMem (
- (UINT8 *)CpuSaveState + mSmmCpuWidthOffset[RegisterIndex].Offset64Lo,
- Buffer,
- MIN (4, Width)
- );
- if (Width >= 4) {
- //
- // Write upper 32-bits of SMM State register
- //
- CopyMem (
- (UINT8 *)CpuSaveState + mSmmCpuWidthOffset[RegisterIndex].Offset64Hi,
- (UINT8 *)Buffer + 4,
- Width - 4
- );
- }
- }
-
- return EFI_SUCCESS;
-}
-
/**
This function is hook point called after the gEfiSmmReadyToLockProtocolGuid
notification is completely processed.
--
2.25.1
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