sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

UefiCpuPkg: Removes SmmCpuFeaturesReadSaveStateRegister

Browse Source 
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4182

Removes SmmCpuFeaturesReadSaveStateRegister and
SmmCpuFeaturesWirteSaveStateRegister function from
SmmCpuFeaturesLib library.

MmSaveStateLib library replaces the functionality of the above
functions.
Platform old/new need to use MmSaveStateLib library to read/write save
state registers.
Current implementation supports Intel and AMD.

Cc: Paul Grimes <paul.grimes@amd.com>
Cc: Abner Chang <abner.chang@amd.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Signed-off-by: Abdul Lateef Attar <abdattar@amd.com>
Reviewed-by: Abner Chang <abner.chang@amd.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
This commit is contained in:
Abdul Lateef Attar
2023-04-07 09:59:07 +05:30
committed by mergify[bot]
parent 065fa2dcc2
commit fbb6f18e1c
7 changed files with 9 additions and 728 deletions
Download Patch File Download Diff File Expand all files Collapse all files

58
UefiCpuPkg/Library/SmmCpuFeaturesLib/AmdSmmCpuFeaturesLib.c
View File

@ -27,64 +27,6 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
// The mode of the CPU at the time an SMI occurs
STATIC UINT8 mSmmSaveStateRegisterLma;
/**
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
)
{
return MmSaveStateReadRegister (CpuIndex, Register, 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
)
{
return MmSaveStateWriteRegister (CpuIndex, Register, Width, Buffer);
}
/**
Performs library initialization.