diff options
| author | Jiaxin Wu <jiaxin.wu@intel.com> | 2024-04-08 09:08:23 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2024-05-08 01:53:58 +0000 |
| commit | 3dfd64305b7f46da6f98ae15c87227b0fb55f726 (patch) | |
| tree | 8ac2c279f68c3d6f3d4d7186f6e3ae7fa3256e3a /OvmfPkg/Library/SmmRelocationLib/InternalSmmRelocationLib.h | |
| parent | 47f212295f17ef2473b37e3e8cfbddd411ad85ea (diff) | |
| download | edk2-3dfd64305b7f46da6f98ae15c87227b0fb55f726.zip edk2-3dfd64305b7f46da6f98ae15c87227b0fb55f726.tar.gz edk2-3dfd64305b7f46da6f98ae15c87227b0fb55f726.tar.bz2 | |
OvmfPkg/SmmRelocationLib: Add library instance for OVMF
There are below 2 differences between AMD & OVMF according
existing implementation:
1.The mode of the CPU check is different between the AMD & OVMF.
OVMF:
CpuSaveState->x86.SMMRevId & 0Xffff
AMD:
LMAValue = (UINT32)AsmReadMsr64 (EFER_ADDRESS) & LMA
2.Existing SmBase configuration is different between the
AMD & OVMF.
OVMF:
if ((CpuSaveState->x86.SMMRevId & 0xFFFF) == 0) {
CpuSaveState->x86.SMBASE = mSmBaseForAllCpus[CpuIndex];
} else {
CpuSaveState->x64.SMBASE = mSmBaseForAllCpus[CpuIndex];
}
AMD:
AmdCpuState->x64.SMBASE = mSmBaseForAllCpus[CpuIndex];
This patch provides the SmmRelocationLib library instance
for OVMF to handle the logic difference, and it won't change
the existing implementation code logic.
Cc: Ray Ni <ray.ni@intel.com>
Cc: Zeng Star <star.zeng@intel.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
Tested-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Jiewen Yao <Jiewen.yao@intel.com>
Diffstat (limited to 'OvmfPkg/Library/SmmRelocationLib/InternalSmmRelocationLib.h')
| -rw-r--r-- | OvmfPkg/Library/SmmRelocationLib/InternalSmmRelocationLib.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/OvmfPkg/Library/SmmRelocationLib/InternalSmmRelocationLib.h b/OvmfPkg/Library/SmmRelocationLib/InternalSmmRelocationLib.h new file mode 100644 index 0000000..d1387f2 --- /dev/null +++ b/OvmfPkg/Library/SmmRelocationLib/InternalSmmRelocationLib.h @@ -0,0 +1,127 @@ +/** @file
+ SMM Relocation Lib for each processor.
+
+ This Lib produces the SMM_BASE_HOB in HOB database which tells
+ the PiSmmCpuDxeSmm driver (runs at a later phase) about the new
+ SMBASE for each processor. PiSmmCpuDxeSmm driver installs the
+ SMI handler at the SMM_BASE_HOB.SmBase[Index]+0x8000 for processor
+ Index.
+
+ Copyright (c) 2024, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef INTERNAL_SMM_RELOCATION_LIB_H_
+#define INTERNAL_SMM_RELOCATION_LIB_H_
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/CpuExceptionHandlerLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/LocalApicLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+#include <Library/PeimEntryPoint.h>
+#include <Library/PeiServicesLib.h>
+#include <Library/SmmRelocationLib.h>
+#include <Guid/SmramMemoryReserve.h>
+#include <Guid/SmmBaseHob.h>
+#include <Register/Intel/Cpuid.h>
+#include <Register/Intel/SmramSaveStateMap.h>
+#include <Protocol/MmCpu.h>
+
+extern IA32_DESCRIPTOR gcSmmInitGdtr;
+extern CONST UINT16 gcSmmInitSize;
+extern CONST UINT8 gcSmmInitTemplate[];
+
+X86_ASSEMBLY_PATCH_LABEL gPatchSmmInitCr0;
+X86_ASSEMBLY_PATCH_LABEL gPatchSmmInitCr3;
+X86_ASSEMBLY_PATCH_LABEL gPatchSmmInitCr4;
+X86_ASSEMBLY_PATCH_LABEL gPatchSmmInitStack;
+
+//
+// The size 0x20 must be bigger than
+// the size of template code of SmmInit. Currently,
+// the size of SmmInit requires the 0x16 Bytes buffer
+// at least.
+//
+#define BACK_BUF_SIZE 0x20
+
+#define CR4_CET_ENABLE BIT23
+
+//
+// EFER register LMA bit
+//
+#define LMA BIT10
+
+/**
+ This function configures the SmBase on the currently executing CPU.
+
+ @param[in] SmBase The SmBase on the currently executing CPU.
+
+**/
+VOID
+EFIAPI
+ConfigureSmBase (
+ IN UINT64 SmBase
+ );
+
+/**
+ Semaphore operation for all processor relocate SMMBase.
+**/
+VOID
+EFIAPI
+SmmRelocationSemaphoreComplete (
+ VOID
+ );
+
+/**
+ Hook the code executed immediately after an RSM instruction on the currently
+ executing CPU. The mode of code executed immediately after RSM must be
+ detected, and the appropriate hook must be selected. Always clear the auto
+ HALT restart flag if it is set.
+
+ @param[in,out] CpuState Pointer to SMRAM Save State Map for the
+ currently executing CPU.
+ @param[in] NewInstructionPointer32 Instruction pointer to use if resuming to
+ 32-bit mode from 64-bit SMM.
+ @param[in] NewInstructionPointer Instruction pointer to use if resuming to
+ same mode as SMM.
+
+ @retval The value of the original instruction pointer before it was hooked.
+
+**/
+UINT64
+EFIAPI
+HookReturnFromSmm (
+ IN OUT SMRAM_SAVE_STATE_MAP *CpuState,
+ IN UINT64 NewInstructionPointer32,
+ IN UINT64 NewInstructionPointer
+ );
+
+/**
+ Hook return address of SMM Save State so that semaphore code
+ can be executed immediately after AP exits SMM to indicate to
+ the BSP that an AP has exited SMM after SMBASE relocation.
+
+ @param[in] RebasedFlag A pointer to a flag that is set to TRUE
+ immediately after AP exits SMM.
+
+**/
+VOID
+SemaphoreHook (
+ IN volatile BOOLEAN *RebasedFlag
+ );
+
+/**
+ This function fixes up the address of the global variable or function
+ referred in SmmInit assembly files to be the absolute address.
+**/
+VOID
+EFIAPI
+SmmInitFixupAddress (
+ );
+
+#endif
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