mirror of https://github.com/acidanthera/audk.git
MdePkg: BaseIoLibIntrinsic (IoLib class) library
This patch adds an SEV-specific .INF and corresponding assembly files, to unroll REP INSx/OUTSx on IoRead/WriteFifo#() routines when the SEV feature is enabled under a hypervisor environment. The new .INF only supports the IA32 and X64 architectures. Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <liming.gao@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> Signed-off-by: Leo Duran <leo.duran@amd.com> Reviewed-by: Liming Gao <liming.gao@intel.com>
This commit is contained in:
Leo Duran
Liming Gao
parent
703ef6cfd5
commit
b6d11d7c46
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@ -0,0 +1,59 @@
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## @file
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# Instance of I/O Library using compiler intrinsics.
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#
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# I/O Library that uses compiler intrinsics to perform IN and OUT instructions
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# for IA-32 and x64.
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#
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# Copyright (c) 2007 - 2015, Intel Corporation. All rights reserved.<BR>
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# Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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# Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
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#
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php.
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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##
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[Defines]
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INF_VERSION = 0x00010005
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BASE_NAME = BaseIoLibIntrinsicSev
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MODULE_UNI_FILE = BaseIoLibIntrinsic.uni
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FILE_GUID = 93742f95-6e71-4581-b600-8e1da443f95a
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MODULE_TYPE = BASE
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VERSION_STRING = 1.0
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LIBRARY_CLASS = IoLib
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#
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# VALID_ARCHITECTURES = IA32 X64
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#
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[Sources]
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IoLibMmioBuffer.c
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BaseIoLibIntrinsicInternal.h
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IoHighLevel.c
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[Sources.IA32]
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IoLibGcc.c | GCC
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IoLibMsc.c | MSFT
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IoLibIcc.c | INTEL
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IoLib.c
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Ia32/IoFifoSev.nasm
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[Sources.X64]
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IoLibGcc.c | GCC
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IoLibMsc.c | MSFT
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IoLibIcc.c | INTEL
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IoLib.c
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X64/IoFifoSev.nasm
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[Packages]
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MdePkg/MdePkg.dec
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[LibraryClasses]
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DebugLib
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BaseLib
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@ -0,0 +1,299 @@
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;------------------------------------------------------------------------------
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;
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; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
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; Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
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;
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; This program and the accompanying materials are licensed and made available
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; under the terms and conditions of the BSD License which accompanies this
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; distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php.
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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;------------------------------------------------------------------------------
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SECTION .text
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;------------------------------------------------------------------------------
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; Check whether we need to unroll the String I/O under SEV guest
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;
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; Return // eax (1 - unroll, 0 - no unroll)
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;------------------------------------------------------------------------------
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global ASM_PFX(SevNoRepIo)
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ASM_PFX(SevNoRepIo):
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; CPUID clobbers ebx, ecx and edx
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push ebx
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push ecx
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push edx
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; Check if we are running under hypervisor
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; CPUID(1).ECX Bit 31
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mov eax, 1
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cpuid
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bt ecx, 31
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jnc @UseRepIo
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; Check if we have Memory encryption CPUID leaf
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mov eax, 0x80000000
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cpuid
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cmp eax, 0x8000001f
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jl @UseRepIo
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; Check for memory encryption feature:
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; CPUID Fn8000_001F[EAX] - Bit 1
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;
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mov eax, 0x8000001f
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cpuid
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bt eax, 1
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jnc @UseRepIo
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; Check if memory encryption is enabled
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; MSR_0xC0010131 - Bit 0 (SEV enabled)
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; MSR_0xC0010131 - Bit 1 (SEV-ES enabled)
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mov ecx, 0xc0010131
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rdmsr
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; Check for (SevEsEnabled == 0 && SevEnabled == 1)
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and eax, 3
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cmp eax, 1
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je @SevNoRepIo_Done
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@UseRepIo:
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xor eax, eax
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@SevNoRepIo_Done:
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pop edx
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pop ecx
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pop ebx
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ret
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoReadFifo8 (
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; IN UINTN Port,
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; IN UINTN Size,
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; OUT VOID *Buffer
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(IoReadFifo8)
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ASM_PFX(IoReadFifo8):
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push edi
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mov dx, [esp + 8]
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mov ecx, [esp + 12]
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mov edi, [esp + 16]
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; Check if we need to unroll String I/O
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call ASM_PFX(SevNoRepIo)
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test eax, eax
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jnz @IoReadFifo8_NoRep
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cld
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rep insb
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jmp @IoReadFifo8_Done
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@IoReadFifo8_NoRep:
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jecxz @IoReadFifo8_Done
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@IoReadFifo8_Loop:
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in al, dx
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mov byte [edi], al
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inc edi
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loop @IoReadFifo8_Loop
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@IoReadFifo8_Done:
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pop edi
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ret
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoReadFifo16 (
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; IN UINTN Port,
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; IN UINTN Size,
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; OUT VOID *Buffer
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(IoReadFifo16)
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ASM_PFX(IoReadFifo16):
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push edi
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mov dx, [esp + 8]
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mov ecx, [esp + 12]
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mov edi, [esp + 16]
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; Check if we need to unroll String I/O
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call ASM_PFX(SevNoRepIo)
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test eax, eax
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jnz @IoReadFifo16_NoRep
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cld
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rep insw
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jmp @IoReadFifo16_Done
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@IoReadFifo16_NoRep:
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jecxz @IoReadFifo16_Done
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@IoReadFifo16_Loop:
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in ax, dx
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mov word [edi], ax
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add edi, 2
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loop @IoReadFifo16_Loop
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@IoReadFifo16_Done:
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pop edi
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ret
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoReadFifo32 (
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; IN UINTN Port,
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; IN UINTN Size,
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; OUT VOID *Buffer
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(IoReadFifo32)
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ASM_PFX(IoReadFifo32):
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push edi
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mov dx, [esp + 8]
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mov ecx, [esp + 12]
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mov edi, [esp + 16]
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; Check if we need to unroll String I/O
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call ASM_PFX(SevNoRepIo)
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test eax, eax
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jnz @IoReadFifo32_NoRep
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cld
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rep insd
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jmp @IoReadFifo32_Done
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@IoReadFifo32_NoRep:
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jecxz @IoReadFifo32_Done
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@IoReadFifo32_Loop:
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in eax, dx
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mov dword [edi], eax
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add edi, 4
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loop @IoReadFifo32_Loop
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@IoReadFifo32_Done:
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pop edi
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ret
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoWriteFifo8 (
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; IN UINTN Port,
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; IN UINTN Size,
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; IN VOID *Buffer
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(IoWriteFifo8)
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ASM_PFX(IoWriteFifo8):
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push esi
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mov dx, [esp + 8]
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mov ecx, [esp + 12]
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mov esi, [esp + 16]
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; Check if we need to unroll String I/O
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call ASM_PFX(SevNoRepIo)
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test eax, eax
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jnz @IoWriteFifo8_NoRep
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cld
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rep outsb
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jmp @IoWriteFifo8_Done
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@IoWriteFifo8_NoRep:
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jecxz @IoWriteFifo8_Done
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@IoWriteFifo8_Loop:
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mov byte [esi], al
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out dx, al
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inc esi
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loop @IoWriteFifo8_Loop
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@IoWriteFifo8_Done:
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pop esi
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ret
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoWriteFifo16 (
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; IN UINTN Port,
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; IN UINTN Size,
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; IN VOID *Buffer
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(IoWriteFifo16)
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ASM_PFX(IoWriteFifo16):
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push esi
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mov dx, [esp + 8]
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mov ecx, [esp + 12]
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mov esi, [esp + 16]
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; Check if we need to unroll String I/O
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call ASM_PFX(SevNoRepIo)
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test eax, eax
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jnz @IoWriteFifo16_NoRep
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cld
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rep outsw
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jmp @IoWriteFifo16_Done
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@IoWriteFifo16_NoRep:
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jecxz @IoWriteFifo16_Done
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@IoWriteFifo16_Loop:
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mov word [esi], ax
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out dx, ax
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add esi, 2
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loop @IoWriteFifo16_Loop
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@IoWriteFifo16_Done:
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pop esi
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ret
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoWriteFifo32 (
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; IN UINTN Port,
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; IN UINTN Size,
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; IN VOID *Buffer
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(IoWriteFifo32)
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ASM_PFX(IoWriteFifo32):
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push esi
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mov dx, [esp + 8]
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mov ecx, [esp + 12]
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mov esi, [esp + 16]
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; Check if we need to unroll String I/O
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call ASM_PFX(SevNoRepIo)
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test eax, eax
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jnz @IoWriteFifo32_NoRep
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cld
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rep outsd
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jmp @IoWriteFifo32_Done
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@IoWriteFifo32_NoRep:
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jecxz @IoWriteFifo32_Done
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@IoWriteFifo32_Loop:
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mov dword [esi], eax
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out dx, eax
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add esi, 4
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loop @IoWriteFifo32_Loop
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@IoWriteFifo32_Done:
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pop esi
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ret
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@ -0,0 +1,288 @@
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;------------------------------------------------------------------------------
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;
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; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
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; Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
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;
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; This program and the accompanying materials are licensed and made available
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; under the terms and conditions of the BSD License which accompanies this
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; distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php.
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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;------------------------------------------------------------------------------
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DEFAULT REL
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SECTION .text
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;------------------------------------------------------------------------------
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; Check whether we need to unroll the String I/O in SEV guest
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;
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; Return // eax (1 - unroll, 0 - no unroll)
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;------------------------------------------------------------------------------
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global ASM_PFX(SevNoRepIo)
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ASM_PFX(SevNoRepIo):
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; CPUID clobbers ebx, ecx and edx
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push rbx
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push rcx
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push rdx
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; Check if we are runing under hypervisor
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; CPUID(1).ECX Bit 31
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mov eax, 1
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cpuid
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bt ecx, 31
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jnc @UseRepIo
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; Check if we have Memory encryption CPUID leaf
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mov eax, 0x80000000
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cpuid
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cmp eax, 0x8000001f
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jl @UseRepIo
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; Check for memory encryption feature:
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; CPUID Fn8000_001F[EAX] - Bit 1
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;
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mov eax, 0x8000001f
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cpuid
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bt eax, 1
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jnc @UseRepIo
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; Check if memory encryption is enabled
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; MSR_0xC0010131 - Bit 0 (SEV enabled)
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; MSR_0xC0010131 - Bit 1 (SEV-ES enabled)
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mov ecx, 0xc0010131
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rdmsr
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; Check for (SevEsEnabled == 0 && SevEnabled == 1)
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and eax, 3
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cmp eax, 1
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je @SevNoRepIo_Done
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@UseRepIo:
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xor eax, eax
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@SevNoRepIo_Done:
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pop rdx
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pop rcx
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pop rbx
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ret
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoReadFifo8 (
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; IN UINTN Port, // rcx
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; IN UINTN Size, // rdx
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; OUT VOID *Buffer // r8
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(IoReadFifo8)
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ASM_PFX(IoReadFifo8):
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xchg rcx, rdx
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xchg rdi, r8 ; rdi: buffer address; r8: save rdi
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; Check if we need to unroll String I/O
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call ASM_PFX(SevNoRepIo)
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test eax, eax
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jnz @IoReadFifo8_NoRep
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cld
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rep insb
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jmp @IoReadFifo8_Done
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@IoReadFifo8_NoRep:
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jrcxz @IoReadFifo8_Done
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@IoReadFifo8_Loop:
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in al, dx
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mov byte [rdi], al
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inc rdi
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loop @IoReadFifo8_Loop
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@IoReadFifo8_Done:
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mov rdi, r8 ; restore rdi
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ret
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoReadFifo16 (
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; IN UINTN Port, // rcx
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; IN UINTN Size, // rdx
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; OUT VOID *Buffer // r8
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(IoReadFifo16)
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ASM_PFX(IoReadFifo16):
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xchg rcx, rdx
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xchg rdi, r8 ; rdi: buffer address; r8: save rdi
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; Check if we need to unroll String I/O
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call ASM_PFX(SevNoRepIo)
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test eax, eax
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jnz @IoReadFifo16_NoRep
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cld
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rep insw
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jmp @IoReadFifo16_Done
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@IoReadFifo16_NoRep:
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jrcxz @IoReadFifo16_Done
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@IoReadFifo16_Loop:
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in ax, dx
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mov word [rdi], ax
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add rdi, 2
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loop @IoReadFifo16_Loop
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@IoReadFifo16_Done:
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mov rdi, r8 ; restore rdi
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ret
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoReadFifo32 (
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; IN UINTN Port, // rcx
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; IN UINTN Size, // rdx
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; OUT VOID *Buffer // r8
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(IoReadFifo32)
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ASM_PFX(IoReadFifo32):
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xchg rcx, rdx
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xchg rdi, r8 ; rdi: buffer address; r8: save rdi
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; Check if we need to unroll String I/O
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call ASM_PFX(SevNoRepIo)
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test eax, eax
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jnz @IoReadFifo32_NoRep
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cld
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rep insd
|
||||
jmp @IoReadFifo32_Done
|
||||
|
||||
@IoReadFifo32_NoRep:
|
||||
jrcxz @IoReadFifo32_Done
|
||||
|
||||
@IoReadFifo32_Loop:
|
||||
in eax, dx
|
||||
mov dword [rdi], eax
|
||||
add rdi, 4
|
||||
loop @IoReadFifo32_Loop
|
||||
|
||||
@IoReadFifo32_Done:
|
||||
mov rdi, r8 ; restore rdi
|
||||
ret
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
; VOID
|
||||
; EFIAPI
|
||||
; IoWriteFifo8 (
|
||||
; IN UINTN Port, // rcx
|
||||
; IN UINTN Size, // rdx
|
||||
; IN VOID *Buffer // r8
|
||||
; );
|
||||
;------------------------------------------------------------------------------
|
||||
global ASM_PFX(IoWriteFifo8)
|
||||
ASM_PFX(IoWriteFifo8):
|
||||
xchg rcx, rdx
|
||||
xchg rsi, r8 ; rsi: buffer address; r8: save rsi
|
||||
|
||||
; Check if we need to unroll String I/O
|
||||
call ASM_PFX(SevNoRepIo)
|
||||
test eax, eax
|
||||
jnz @IoWriteFifo8_NoRep
|
||||
|
||||
cld
|
||||
rep outsb
|
||||
jmp @IoWriteFifo8_Done
|
||||
|
||||
@IoWriteFifo8_NoRep:
|
||||
jrcxz @IoWriteFifo8_Done
|
||||
|
||||
@IoWriteFifo8_Loop:
|
||||
mov byte [rsi], al
|
||||
out dx, al
|
||||
inc rsi
|
||||
loop @IoWriteFifo8_Loop
|
||||
|
||||
@IoWriteFifo8_Done:
|
||||
mov rsi, r8 ; restore rsi
|
||||
ret
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
; VOID
|
||||
; EFIAPI
|
||||
; IoWriteFifo16 (
|
||||
; IN UINTN Port, // rcx
|
||||
; IN UINTN Size, // rdx
|
||||
; IN VOID *Buffer // r8
|
||||
; );
|
||||
;------------------------------------------------------------------------------
|
||||
global ASM_PFX(IoWriteFifo16)
|
||||
ASM_PFX(IoWriteFifo16):
|
||||
xchg rcx, rdx
|
||||
xchg rsi, r8 ; rsi: buffer address; r8: save rsi
|
||||
|
||||
; Check if we need to unroll String I/O
|
||||
call ASM_PFX(SevNoRepIo)
|
||||
test eax, eax
|
||||
jnz @IoWriteFifo16_NoRep
|
||||
|
||||
cld
|
||||
rep outsw
|
||||
jmp @IoWriteFifo16_Done
|
||||
|
||||
@IoWriteFifo16_NoRep:
|
||||
jrcxz @IoWriteFifo16_Done
|
||||
|
||||
@IoWriteFifo16_Loop:
|
||||
mov word [rsi], ax
|
||||
out dx, ax
|
||||
add rsi, 2
|
||||
loop @IoWriteFifo16_Loop
|
||||
|
||||
@IoWriteFifo16_Done:
|
||||
mov rsi, r8 ; restore rsi
|
||||
ret
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
; VOID
|
||||
; EFIAPI
|
||||
; IoWriteFifo32 (
|
||||
; IN UINTN Port, // rcx
|
||||
; IN UINTN Size, // rdx
|
||||
; IN VOID *Buffer // r8
|
||||
; );
|
||||
;------------------------------------------------------------------------------
|
||||
global ASM_PFX(IoWriteFifo32)
|
||||
ASM_PFX(IoWriteFifo32):
|
||||
xchg rcx, rdx
|
||||
xchg rsi, r8 ; rsi: buffer address; r8: save rsi
|
||||
|
||||
; Check if we need to unroll String I/O
|
||||
call ASM_PFX(SevNoRepIo)
|
||||
test eax, eax
|
||||
jnz @IoWriteFifo32_NoRep
|
||||
|
||||
cld
|
||||
rep outsd
|
||||
jmp @IoWriteFifo32_Done
|
||||
|
||||
@IoWriteFifo32_NoRep:
|
||||
jrcxz @IoWriteFifo32_Done
|
||||
|
||||
@IoWriteFifo32_Loop:
|
||||
mov dword [rsi], eax
|
||||
out dx, eax
|
||||
add rsi, 4
|
||||
loop @IoWriteFifo32_Loop
|
||||
|
||||
@IoWriteFifo32_Done:
|
||||
mov rsi, r8 ; restore rsi
|
||||
ret
|
||||
|
||||
|
|
@ -134,6 +134,7 @@
|
|||
|
||||
[Components.IA32, Components.X64]
|
||||
MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsic.inf
|
||||
MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf
|
||||
MdePkg/Library/BaseMemoryLibMmx/BaseMemoryLibMmx.inf
|
||||
MdePkg/Library/BaseMemoryLibOptDxe/BaseMemoryLibOptDxe.inf
|
||||
MdePkg/Library/BaseMemoryLibOptPei/BaseMemoryLibOptPei.inf
|
||||
|
|
|
|||
Loading…
Reference in New Issue