https://bugzilla.tianocore.org/show_bug.cgi?id=3284
This patch is to support Extended Control Register(XCR) Read and Write. Cc: Michael D Kinney <michael.d.kin...@intel.com> Cc: Liming Gao <gaolim...@byosoft.com.cn> Cc: Zhiguang Liu <zhiguang....@intel.com> Signed-off-by: Zhang Hongbin1 <hongbin1.zh...@intel.com> Signed-off-by: Jiaxin Wu <jiaxin...@intel.com> --- MdePkg/Include/Library/BaseLib.h | 46 ++++++++++++++++++++++++++++++- MdePkg/Library/BaseLib/BaseLib.inf | 4 ++- MdePkg/Library/BaseLib/Ia32/ReadXcr.nasm | 31 +++++++++++++++++++++ MdePkg/Library/BaseLib/Ia32/WriteXcr.nasm | 34 +++++++++++++++++++++++ 4 files changed, 113 insertions(+), 2 deletions(-) create mode 100644 MdePkg/Library/BaseLib/Ia32/ReadXcr.nasm create mode 100644 MdePkg/Library/BaseLib/Ia32/WriteXcr.nasm diff --git a/MdePkg/Include/Library/BaseLib.h b/MdePkg/Include/Library/BaseLib.h index 1171a0ffb5..c51633ad73 100644 --- a/MdePkg/Include/Library/BaseLib.h +++ b/MdePkg/Include/Library/BaseLib.h @@ -1,10 +1,10 @@ /** @file Provides string functions, linked list functions, math functions, synchronization functions, file path functions, and CPU architecture-specific functions. -Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR> +Copyright (c) 2006 - 2021, Intel Corporation. All rights reserved.<BR> Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> Copyright (c) Microsoft Corporation.<BR> Portions Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR> SPDX-License-Identifier: BSD-2-Clause-Patent @@ -7493,7 +7493,51 @@ PatchInstructionX86 ( OUT X86_ASSEMBLY_PATCH_LABEL *InstructionEnd, IN UINT64 PatchValue, IN UINTN ValueSize ); +/** + Returns a 64-bit Extended Control Register(XCR). + + Reads and returns the 64-bit XCR specified by Index. No parameter checking is + performed on Index, and some Index values may cause CPU exceptions. The + caller must either guarantee that Index is valid, or the caller must set up + exception handlers to catch the exceptions. This function is only available + on IA-32 and x64. + + @param Index The 32-bit XCR index to read. + + @return The value of the XCR identified by Index. + +**/ +UINT64 +EFIAPI +AsmReadXcr ( + IN UINT32 Index + ); + +/** + Writes a 64-bit value to a Extended Control Register(XCR), and returns the + value. + + Writes the 64-bit value specified by Value to the XCR specified by Index. The + 64-bit value written to the XCR is returned. No parameter checking is + performed on Index or Value, and some of these may cause CPU exceptions. The + caller must either guarantee that Index and Value are valid, or the caller + must establish proper exception handlers. This function is only available on + IA-32 and x64. + + @param Index The 32-bit XCR index to write. + @param Value The 64-bit value to write to the XCR. + + @return Value + +**/ +UINT64 +EFIAPI +AsmWriteXcr ( + IN UINT32 Index, + IN UINT64 Value + ); + #endif // defined (MDE_CPU_IA32) || defined (MDE_CPU_X64) #endif // !defined (__BASE_LIB__) diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf index 3b85c56c3c..e62031ea11 100644 --- a/MdePkg/Library/BaseLib/BaseLib.inf +++ b/MdePkg/Library/BaseLib/BaseLib.inf @@ -1,9 +1,9 @@ ## @file # Base Library implementation. # -# Copyright (c) 2007 - 2020, Intel Corporation. All rights reserved.<BR> +# Copyright (c) 2007 - 2021, Intel Corporation. All rights reserved.<BR> # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> # Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR> # Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR> # # SPDX-License-Identifier: BSD-2-Clause-Patent @@ -63,10 +63,12 @@ BaseLibInternals.h [Sources.Ia32] Ia32/WriteTr.nasm Ia32/Lfence.nasm + Ia32/ReadXcr.nasm + Ia32/WriteXcr.nasm Ia32/Wbinvd.c | MSFT Ia32/WriteMm7.c | MSFT Ia32/WriteMm6.c | MSFT Ia32/WriteMm5.c | MSFT diff --git a/MdePkg/Library/BaseLib/Ia32/ReadXcr.nasm b/MdePkg/Library/BaseLib/Ia32/ReadXcr.nasm new file mode 100644 index 0000000000..5d50d8ba01 --- /dev/null +++ b/MdePkg/Library/BaseLib/Ia32/ReadXcr.nasm @@ -0,0 +1,31 @@ +;------------------------------------------------------------------------------ +; +; Copyright (c) 2021, Intel Corporation. All rights reserved.<BR> +; SPDX-License-Identifier: BSD-2-Clause-Patent +; +; Module Name: +; +; ReadXcr.Asm +; +; Abstract: +; +; AsmReadXcr function +; +; Notes: +; +;------------------------------------------------------------------------------ + + SECTION .text + +;------------------------------------------------------------------------------ +; UINT64 +; EFIAPI +; AsmReadXcr ( +; IN UINT32 Index +; ); +;------------------------------------------------------------------------------ +global ASM_PFX(AsmReadXcr) +ASM_PFX(AsmReadXcr): + mov ecx, [esp + 4] + xgetbv + ret \ No newline at end of file diff --git a/MdePkg/Library/BaseLib/Ia32/WriteXcr.nasm b/MdePkg/Library/BaseLib/Ia32/WriteXcr.nasm new file mode 100644 index 0000000000..009d41864b --- /dev/null +++ b/MdePkg/Library/BaseLib/Ia32/WriteXcr.nasm @@ -0,0 +1,34 @@ +;------------------------------------------------------------------------------ +; +; Copyright (c) 2021, Intel Corporation. All rights reserved.<BR> +; SPDX-License-Identifier: BSD-2-Clause-Patent +; +; Module Name: +; +; WriteXcr.nasm +; +; Abstract: +; +; AsmWriteXcr function +; +; Notes: +; +;------------------------------------------------------------------------------ + + SECTION .text + +;------------------------------------------------------------------------------ +; UINT64 +; EFIAPI +; AsmWriteXcr ( +; IN UINT32 Index, +; IN UINT64 Value +; ); +;------------------------------------------------------------------------------ +global ASM_PFX(AsmWriteXcr) +ASM_PFX(AsmWriteXcr): + mov edx, [esp + 12] + mov eax, [esp + 8] + mov ecx, [esp + 4] + xsetbv + ret \ No newline at end of file -- 2.16.2.windows.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. 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