.../Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm | 293 +++++++++++++++++++++ .../Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm | 282 ++++++++++++++++++++ MdePkg/MdePkg.dsc | 2 + 3 files changed, 577 insertions(+) create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm
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>
---
.../Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm | 293 +++++++++++++++++++++
.../Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm | 282 ++++++++++++++++++++
MdePkg/MdePkg.dsc | 2 +
3 files changed, 577 insertions(+)
create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm
create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm
diff --git a/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm b/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm
new file mode 100644
index 0000000..9adb972
--- /dev/null
+++ b/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm
@@ -0,0 +1,293 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
+;
+; This program and the accompanying materials are licensed and made available
+; under the terms and conditions of the BSD License which accompanies this
+; distribution. The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php.
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+;------------------------------------------------------------------------------
+
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; Check whether we need to unroll the String I/O under SEV guest
+;
+; Return // eax (1 - unroll, 0 - no unroll)
+;------------------------------------------------------------------------------
+global ASM_PFX(SevNoRepIo)
+ASM_PFX(SevNoRepIo):
+
+ ; CPUID clobbers ebx, ecx and edx
+ push ebx
+ push ecx
+ push edx
+
+ ; Check if we are running under hypervisor
+ ; CPUID(1).ECX Bit 31
+ mov eax, 1
+ cpuid
+ bt ecx, 31
+ jnc @UseRepIo
+
+ ; Check if we have Memory encryption CPUID leaf
+ mov eax, 0x80000000
+ cpuid
+ cmp eax, 0x8000001f
+ jl @UseRepIo
+
+ ; Check for memory encryption feature:
+ ; CPUID Fn8000_001F[EAX] - Bit 1
+ ;
+ mov eax, 0x8000001f
+ cpuid
+ bt eax, 1
+ jnc @UseRepIo
+
+ ; Check if memory encryption is enabled
+ ; MSR_0xC0010131 - Bit 0 (SEV enabled)
+ ; MSR_0xC0010131 - Bit 1 (SEV-ES enabled)
+ mov ecx, 0xc0010131
+ rdmsr
+
+ ; Check for (SevEsEnabled == 0 && SevEnabled == 1)
+ and eax, 3
+ cmp eax, 1
+ je @SevNoRepIo_Done
+
+@UseRepIo:
+ xor eax, eax
+
+@SevNoRepIo_Done:
+ pop edx
+ pop ecx
+ pop ebx
+ ret
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; IoReadFifo8 (
+; IN UINTN Port,
+; IN UINTN Size,
+; OUT VOID *Buffer
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(IoReadFifo8)
+ASM_PFX(IoReadFifo8):
+ push edi
+ mov dx, [esp + 8]
+ mov ecx, [esp + 12]
+ mov edi, [esp + 16]
+
+ call SevNoRepIo ; Check if we need to unroll the rep
+ test eax, eax
+ jnz @IoReadFifo8_NoRep
+
+ cld
+ rep insb
+ jmp @IoReadFifo8_Done
+
+@IoReadFifo8_NoRep:
+ jecxz @IoReadFifo8_Done
+
+@IoReadFifo8_Loop:
+ in al, dx
+ mov byte [edi], al
+ inc edi
+ loop @IoReadFifo8_Loop
+
+@IoReadFifo8_Done:
+ pop edi
+ ret
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; IoReadFifo16 (
+; IN UINTN Port,
+; IN UINTN Size,
+; OUT VOID *Buffer
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(IoReadFifo16)
+ASM_PFX(IoReadFifo16):
+ push edi
+ mov dx, [esp + 8]
+ mov ecx, [esp + 12]
+ mov edi, [esp + 16]
+
+ call SevNoRepIo ; Check if we need to unroll the rep
+ test eax, eax
+ jnz @IoReadFifo16_NoRep
+
+ cld
+ rep insw
+ jmp @IoReadFifo16_Done
+
+@IoReadFifo16_NoRep:
+ jecxz @IoReadFifo16_Done
+
+@IoReadFifo16_Loop:
+ in ax, dx
+ mov word [edi], ax
+ add edi, 2
+ loop @IoReadFifo16_Loop
+
+@IoReadFifo16_Done:
+ pop edi
+ ret
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; IoReadFifo32 (
+; IN UINTN Port,
+; IN UINTN Size,
+; OUT VOID *Buffer
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(IoReadFifo32)
+ASM_PFX(IoReadFifo32):
+ push edi
+ mov dx, [esp + 8]
+ mov ecx, [esp + 12]
+ mov edi, [esp + 16]
+
+ call SevNoRepIo ; Check if we need to unroll the rep
+ test eax, eax
+ jnz @IoReadFifo32_NoRep
+
+ cld
+ rep insd
+ jmp @IoReadFifo32_Done
+
+@IoReadFifo32_NoRep:
+ jecxz @IoReadFifo32_Done
+
+@IoReadFifo32_Loop:
+ in eax, dx
+ mov dword [edi], eax
+ add edi, 4
+ loop @IoReadFifo32_Loop
+
+@IoReadFifo32_Done:
+ pop edi
+ ret
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; IoWriteFifo8 (
+; IN UINTN Port,
+; IN UINTN Size,
+; IN VOID *Buffer
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(IoWriteFifo8)
+ASM_PFX(IoWriteFifo8):
+ push esi
+ mov dx, [esp + 8]
+ mov ecx, [esp + 12]
+ mov esi, [esp + 16]
+
+ call SevNoRepIo ; Check if we need to unroll String I/O
+ test eax, eax
+ jnz @IoWriteFifo8_NoRep
+
+ cld
+ rep outsb
+ jmp @IoWriteFifo8_Done
+
+@IoWriteFifo8_NoRep:
+ jecxz @IoWriteFifo8_Done
+
+@IoWriteFifo8_Loop:
+ mov byte [esi], al
+ out dx, al
+ inc esi
+ loop @IoWriteFifo8_Loop
+
+@IoWriteFifo8_Done:
+ pop esi
+ ret
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; IoWriteFifo16 (
+; IN UINTN Port,
+; IN UINTN Size,
+; IN VOID *Buffer
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(IoWriteFifo16)
+ASM_PFX(IoWriteFifo16):
+ push esi
+ mov dx, [esp + 8]
+ mov ecx, [esp + 12]
+ mov esi, [esp + 16]
+
+ call SevNoRepIo ; Check if we need to unroll String I/O
+ test eax, eax
+ jnz @IoWriteFifo16_NoRep
+
+ cld
+ rep outsw
+ jmp @IoWriteFifo16_Done
+
+@IoWriteFifo16_NoRep:
+ jecxz @IoWriteFifo16_Done
+
+@IoWriteFifo16_Loop:
+ mov word [esi], ax
+ out dx, ax
+ add esi, 2
+ loop @IoWriteFifo16_Loop
+
+@IoWriteFifo16_Done:
+ pop esi
+ ret
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; IoWriteFifo32 (
+; IN UINTN Port,
+; IN UINTN Size,
+; IN VOID *Buffer
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(IoWriteFifo32)
+ASM_PFX(IoWriteFifo32):
+ push esi
+ mov dx, [esp + 8]
+ mov ecx, [esp + 12]
+ mov esi, [esp + 16]
+
+ call SevNoRepIo ; Check if we need to unroll String I/O
+ test eax, eax
+ jnz @IoWriteFifo32_NoRep
+
+ cld
+ rep outsd
+ jmp @IoWriteFifo32_Done
+
+@IoWriteFifo32_NoRep:
+ jecxz @IoWriteFifo32_Done
+
+@IoWriteFifo32_Loop:
+ mov dword [esi], eax
+ out dx, eax
+ add esi, 4
+ loop @IoWriteFifo32_Loop
+
+@IoWriteFifo32_Done:
+ pop esi
+ ret
+
diff --git a/MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm b/MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm
new file mode 100644
index 0000000..20e3e64
--- /dev/null
+++ b/MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm
@@ -0,0 +1,282 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
+;
+; This program and the accompanying materials are licensed and made available
+; under the terms and conditions of the BSD License which accompanies this
+; distribution. The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php.
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+;------------------------------------------------------------------------------
+
+ DEFAULT REL
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; Check whether we need to unroll the String I/O in SEV guest
+;
+; Return // eax (1 - unroll, 0 - no unroll)
+;------------------------------------------------------------------------------
+global ASM_PFX(SevNoRepIo)
+ASM_PFX(SevNoRepIo):
+
+ ; CPUID clobbers ebx, ecx and edx
+ push rbx
+ push rcx
+ push rdx
+
+ ; Check if we are runing under hypervisor
+ ; CPUID(1).ECX Bit 31
+ mov eax, 1
+ cpuid
+ bt ecx, 31
+ jnc @UseRepIo
+
+ ; Check if we have Memory encryption CPUID leaf
+ mov eax, 0x80000000
+ cpuid
+ cmp eax, 0x8000001f
+ jl @UseRepIo
+
+ ; Check for memory encryption feature:
+ ; CPUID Fn8000_001F[EAX] - Bit 1
+ ;
+ mov eax, 0x8000001f
+ cpuid
+ bt eax, 1
+ jnc @UseRepIo
+
+ ; Check if memory encryption is enabled
+ ; MSR_0xC0010131 - Bit 0 (SEV enabled)
+ ; MSR_0xC0010131 - Bit 1 (SEV-ES enabled)
+ mov ecx, 0xc0010131
+ rdmsr
+
+ ; Check for (SevEsEnabled == 0 && SevEnabled == 1)
+ and eax, 3
+ cmp eax, 1
+ je @SevNoRepIo_Done
+
+@UseRepIo:
+ xor eax, eax
+
+@SevNoRepIo_Done:
+ pop rdx
+ pop rcx
+ pop rbx
+ ret
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; IoReadFifo8 (
+; IN UINTN Port, // rcx
+; IN UINTN Size, // rdx
+; OUT VOID *Buffer // r8
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(IoReadFifo8)
+ASM_PFX(IoReadFifo8):
+ xchg rcx, rdx
+ xchg rdi, r8 ; rdi: buffer address; r8: save rdi
+
+ call SevNoRepIo ; Check if we need to unroll String I/O
+ test eax, eax
+ jnz @IoReadFifo8_NoRep
+
+ cld
+ rep insb
+ jmp @IoReadFifo8_Done
+
+@IoReadFifo8_NoRep:
+ jrcxz @IoReadFifo8_Done
+
+@IoReadFifo8_Loop:
+ in al, dx
+ mov byte [rdi], al
+ inc rdi
+ loop @IoReadFifo8_Loop
+
+@IoReadFifo8_Done:
+ mov rdi, r8 ; restore rdi
+ ret
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; IoReadFifo16 (
+; IN UINTN Port, // rcx
+; IN UINTN Size, // rdx
+; OUT VOID *Buffer // r8
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(IoReadFifo16)
+ASM_PFX(IoReadFifo16):
+ xchg rcx, rdx
+ xchg rdi, r8 ; rdi: buffer address; r8: save rdi
+
+ call SevNoRepIo ; Check if we need to unroll String I/O
+ test eax, eax
+ jnz @IoReadFifo16_NoRep
+
+ cld
+ rep insw
+ jmp @IoReadFifo16_Done
+
+@IoReadFifo16_NoRep:
+ jrcxz @IoReadFifo16_Done
+
+@IoReadFifo16_Loop:
+ in ax, dx
+ mov word [rdi], ax
+ add rdi, 2
+ loop @IoReadFifo16_Loop
+
+@IoReadFifo16_Done:
+ mov rdi, r8 ; restore rdi
+ ret
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; IoReadFifo32 (
+; IN UINTN Port, // rcx
+; IN UINTN Size, // rdx
+; OUT VOID *Buffer // r8
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(IoReadFifo32)
+ASM_PFX(IoReadFifo32):
+ xchg rcx, rdx
+ xchg rdi, r8 ; rdi: buffer address; r8: save rdi
+
+ call SevNoRepIo ; Check if we need to unroll String I/O
+ test eax, eax
+ jnz @IoReadFifo32_NoRep
+
+ cld
+ 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
+
+ call SevNoRepIo ; Check if we need to unroll String I/O
+ 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
+
+ call SevNoRepIo ; Check if we need to unroll String I/O
+ 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
+
+ call SevNoRepIo ; Check if we need to unroll String I/O
+ 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
+
diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc
index 2144979..56fb4cf 100644
--- a/MdePkg/MdePkg.dsc
+++ b/MdePkg/MdePkg.dsc
@@ -3,6 +3,7 @@
#
# Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.<BR>
# Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+# Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
@@ -134,6 +135,7 @@
[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
--
2.7.4
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Leo: Seemly, this patch doesn't include new INF file. Could you create it again? Thanks Liming > -----Original Message----- > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Leo Duran > Sent: Wednesday, April 5, 2017 9:20 PM > To: edk2-devel@ml01.01.org > Cc: Kinney, Michael D <michael.d.kinney@intel.com>; Brijesh Singh <brijesh.singh@amd.com>; Leo Duran <leo.duran@amd.com>; Gao, > Liming <liming.gao@intel.com> > Subject: [edk2] [PATCH v5] 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> > --- > .../Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm | 293 +++++++++++++++++++++ > .../Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm | 282 ++++++++++++++++++++ > MdePkg/MdePkg.dsc | 2 + > 3 files changed, 577 insertions(+) > create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm > create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm > > diff --git a/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm b/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm > new file mode 100644 > index 0000000..9adb972 > --- /dev/null > +++ b/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm > @@ -0,0 +1,293 @@ > +;------------------------------------------------------------------------------ > +; > +; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR> > +; Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR> > +; > +; This program and the accompanying materials are licensed and made available > +; under the terms and conditions of the BSD License which accompanies this > +; distribution. The full text of the license may be found at > +; http://opensource.org/licenses/bsd-license.php. > +; > +; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, > +; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. > +; > +;------------------------------------------------------------------------------ > + > + SECTION .text > + > +;------------------------------------------------------------------------------ > +; Check whether we need to unroll the String I/O under SEV guest > +; > +; Return // eax (1 - unroll, 0 - no unroll) > +;------------------------------------------------------------------------------ > +global ASM_PFX(SevNoRepIo) > +ASM_PFX(SevNoRepIo): > + > + ; CPUID clobbers ebx, ecx and edx > + push ebx > + push ecx > + push edx > + > + ; Check if we are running under hypervisor > + ; CPUID(1).ECX Bit 31 > + mov eax, 1 > + cpuid > + bt ecx, 31 > + jnc @UseRepIo > + > + ; Check if we have Memory encryption CPUID leaf > + mov eax, 0x80000000 > + cpuid > + cmp eax, 0x8000001f > + jl @UseRepIo > + > + ; Check for memory encryption feature: > + ; CPUID Fn8000_001F[EAX] - Bit 1 > + ; > + mov eax, 0x8000001f > + cpuid > + bt eax, 1 > + jnc @UseRepIo > + > + ; Check if memory encryption is enabled > + ; MSR_0xC0010131 - Bit 0 (SEV enabled) > + ; MSR_0xC0010131 - Bit 1 (SEV-ES enabled) > + mov ecx, 0xc0010131 > + rdmsr > + > + ; Check for (SevEsEnabled == 0 && SevEnabled == 1) > + and eax, 3 > + cmp eax, 1 > + je @SevNoRepIo_Done > + > +@UseRepIo: > + xor eax, eax > + > +@SevNoRepIo_Done: > + pop edx > + pop ecx > + pop ebx > + ret > + > +;------------------------------------------------------------------------------ > +; VOID > +; EFIAPI > +; IoReadFifo8 ( > +; IN UINTN Port, > +; IN UINTN Size, > +; OUT VOID *Buffer > +; ); > +;------------------------------------------------------------------------------ > +global ASM_PFX(IoReadFifo8) > +ASM_PFX(IoReadFifo8): > + push edi > + mov dx, [esp + 8] > + mov ecx, [esp + 12] > + mov edi, [esp + 16] > + > + call SevNoRepIo ; Check if we need to unroll the rep > + test eax, eax > + jnz @IoReadFifo8_NoRep > + > + cld > + rep insb > + jmp @IoReadFifo8_Done > + > +@IoReadFifo8_NoRep: > + jecxz @IoReadFifo8_Done > + > +@IoReadFifo8_Loop: > + in al, dx > + mov byte [edi], al > + inc edi > + loop @IoReadFifo8_Loop > + > +@IoReadFifo8_Done: > + pop edi > + ret > + > +;------------------------------------------------------------------------------ > +; VOID > +; EFIAPI > +; IoReadFifo16 ( > +; IN UINTN Port, > +; IN UINTN Size, > +; OUT VOID *Buffer > +; ); > +;------------------------------------------------------------------------------ > +global ASM_PFX(IoReadFifo16) > +ASM_PFX(IoReadFifo16): > + push edi > + mov dx, [esp + 8] > + mov ecx, [esp + 12] > + mov edi, [esp + 16] > + > + call SevNoRepIo ; Check if we need to unroll the rep > + test eax, eax > + jnz @IoReadFifo16_NoRep > + > + cld > + rep insw > + jmp @IoReadFifo16_Done > + > +@IoReadFifo16_NoRep: > + jecxz @IoReadFifo16_Done > + > +@IoReadFifo16_Loop: > + in ax, dx > + mov word [edi], ax > + add edi, 2 > + loop @IoReadFifo16_Loop > + > +@IoReadFifo16_Done: > + pop edi > + ret > + > +;------------------------------------------------------------------------------ > +; VOID > +; EFIAPI > +; IoReadFifo32 ( > +; IN UINTN Port, > +; IN UINTN Size, > +; OUT VOID *Buffer > +; ); > +;------------------------------------------------------------------------------ > +global ASM_PFX(IoReadFifo32) > +ASM_PFX(IoReadFifo32): > + push edi > + mov dx, [esp + 8] > + mov ecx, [esp + 12] > + mov edi, [esp + 16] > + > + call SevNoRepIo ; Check if we need to unroll the rep > + test eax, eax > + jnz @IoReadFifo32_NoRep > + > + cld > + rep insd > + jmp @IoReadFifo32_Done > + > +@IoReadFifo32_NoRep: > + jecxz @IoReadFifo32_Done > + > +@IoReadFifo32_Loop: > + in eax, dx > + mov dword [edi], eax > + add edi, 4 > + loop @IoReadFifo32_Loop > + > +@IoReadFifo32_Done: > + pop edi > + ret > + > +;------------------------------------------------------------------------------ > +; VOID > +; EFIAPI > +; IoWriteFifo8 ( > +; IN UINTN Port, > +; IN UINTN Size, > +; IN VOID *Buffer > +; ); > +;------------------------------------------------------------------------------ > +global ASM_PFX(IoWriteFifo8) > +ASM_PFX(IoWriteFifo8): > + push esi > + mov dx, [esp + 8] > + mov ecx, [esp + 12] > + mov esi, [esp + 16] > + > + call SevNoRepIo ; Check if we need to unroll String I/O > + test eax, eax > + jnz @IoWriteFifo8_NoRep > + > + cld > + rep outsb > + jmp @IoWriteFifo8_Done > + > +@IoWriteFifo8_NoRep: > + jecxz @IoWriteFifo8_Done > + > +@IoWriteFifo8_Loop: > + mov byte [esi], al > + out dx, al > + inc esi > + loop @IoWriteFifo8_Loop > + > +@IoWriteFifo8_Done: > + pop esi > + ret > + > +;------------------------------------------------------------------------------ > +; VOID > +; EFIAPI > +; IoWriteFifo16 ( > +; IN UINTN Port, > +; IN UINTN Size, > +; IN VOID *Buffer > +; ); > +;------------------------------------------------------------------------------ > +global ASM_PFX(IoWriteFifo16) > +ASM_PFX(IoWriteFifo16): > + push esi > + mov dx, [esp + 8] > + mov ecx, [esp + 12] > + mov esi, [esp + 16] > + > + call SevNoRepIo ; Check if we need to unroll String I/O > + test eax, eax > + jnz @IoWriteFifo16_NoRep > + > + cld > + rep outsw > + jmp @IoWriteFifo16_Done > + > +@IoWriteFifo16_NoRep: > + jecxz @IoWriteFifo16_Done > + > +@IoWriteFifo16_Loop: > + mov word [esi], ax > + out dx, ax > + add esi, 2 > + loop @IoWriteFifo16_Loop > + > +@IoWriteFifo16_Done: > + pop esi > + ret > + > +;------------------------------------------------------------------------------ > +; VOID > +; EFIAPI > +; IoWriteFifo32 ( > +; IN UINTN Port, > +; IN UINTN Size, > +; IN VOID *Buffer > +; ); > +;------------------------------------------------------------------------------ > +global ASM_PFX(IoWriteFifo32) > +ASM_PFX(IoWriteFifo32): > + push esi > + mov dx, [esp + 8] > + mov ecx, [esp + 12] > + mov esi, [esp + 16] > + > + call SevNoRepIo ; Check if we need to unroll String I/O > + test eax, eax > + jnz @IoWriteFifo32_NoRep > + > + cld > + rep outsd > + jmp @IoWriteFifo32_Done > + > +@IoWriteFifo32_NoRep: > + jecxz @IoWriteFifo32_Done > + > +@IoWriteFifo32_Loop: > + mov dword [esi], eax > + out dx, eax > + add esi, 4 > + loop @IoWriteFifo32_Loop > + > +@IoWriteFifo32_Done: > + pop esi > + ret > + > diff --git a/MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm b/MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm > new file mode 100644 > index 0000000..20e3e64 > --- /dev/null > +++ b/MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm > @@ -0,0 +1,282 @@ > +;------------------------------------------------------------------------------ > +; > +; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR> > +; Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR> > +; > +; This program and the accompanying materials are licensed and made available > +; under the terms and conditions of the BSD License which accompanies this > +; distribution. The full text of the license may be found at > +; http://opensource.org/licenses/bsd-license.php. > +; > +; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, > +; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. > +; > +;------------------------------------------------------------------------------ > + > + DEFAULT REL > + SECTION .text > + > +;------------------------------------------------------------------------------ > +; Check whether we need to unroll the String I/O in SEV guest > +; > +; Return // eax (1 - unroll, 0 - no unroll) > +;------------------------------------------------------------------------------ > +global ASM_PFX(SevNoRepIo) > +ASM_PFX(SevNoRepIo): > + > + ; CPUID clobbers ebx, ecx and edx > + push rbx > + push rcx > + push rdx > + > + ; Check if we are runing under hypervisor > + ; CPUID(1).ECX Bit 31 > + mov eax, 1 > + cpuid > + bt ecx, 31 > + jnc @UseRepIo > + > + ; Check if we have Memory encryption CPUID leaf > + mov eax, 0x80000000 > + cpuid > + cmp eax, 0x8000001f > + jl @UseRepIo > + > + ; Check for memory encryption feature: > + ; CPUID Fn8000_001F[EAX] - Bit 1 > + ; > + mov eax, 0x8000001f > + cpuid > + bt eax, 1 > + jnc @UseRepIo > + > + ; Check if memory encryption is enabled > + ; MSR_0xC0010131 - Bit 0 (SEV enabled) > + ; MSR_0xC0010131 - Bit 1 (SEV-ES enabled) > + mov ecx, 0xc0010131 > + rdmsr > + > + ; Check for (SevEsEnabled == 0 && SevEnabled == 1) > + and eax, 3 > + cmp eax, 1 > + je @SevNoRepIo_Done > + > +@UseRepIo: > + xor eax, eax > + > +@SevNoRepIo_Done: > + pop rdx > + pop rcx > + pop rbx > + ret > + > +;------------------------------------------------------------------------------ > +; VOID > +; EFIAPI > +; IoReadFifo8 ( > +; IN UINTN Port, // rcx > +; IN UINTN Size, // rdx > +; OUT VOID *Buffer // r8 > +; ); > +;------------------------------------------------------------------------------ > +global ASM_PFX(IoReadFifo8) > +ASM_PFX(IoReadFifo8): > + xchg rcx, rdx > + xchg rdi, r8 ; rdi: buffer address; r8: save rdi > + > + call SevNoRepIo ; Check if we need to unroll String I/O > + test eax, eax > + jnz @IoReadFifo8_NoRep > + > + cld > + rep insb > + jmp @IoReadFifo8_Done > + > +@IoReadFifo8_NoRep: > + jrcxz @IoReadFifo8_Done > + > +@IoReadFifo8_Loop: > + in al, dx > + mov byte [rdi], al > + inc rdi > + loop @IoReadFifo8_Loop > + > +@IoReadFifo8_Done: > + mov rdi, r8 ; restore rdi > + ret > + > +;------------------------------------------------------------------------------ > +; VOID > +; EFIAPI > +; IoReadFifo16 ( > +; IN UINTN Port, // rcx > +; IN UINTN Size, // rdx > +; OUT VOID *Buffer // r8 > +; ); > +;------------------------------------------------------------------------------ > +global ASM_PFX(IoReadFifo16) > +ASM_PFX(IoReadFifo16): > + xchg rcx, rdx > + xchg rdi, r8 ; rdi: buffer address; r8: save rdi > + > + call SevNoRepIo ; Check if we need to unroll String I/O > + test eax, eax > + jnz @IoReadFifo16_NoRep > + > + cld > + rep insw > + jmp @IoReadFifo16_Done > + > +@IoReadFifo16_NoRep: > + jrcxz @IoReadFifo16_Done > + > +@IoReadFifo16_Loop: > + in ax, dx > + mov word [rdi], ax > + add rdi, 2 > + loop @IoReadFifo16_Loop > + > +@IoReadFifo16_Done: > + mov rdi, r8 ; restore rdi > + ret > + > +;------------------------------------------------------------------------------ > +; VOID > +; EFIAPI > +; IoReadFifo32 ( > +; IN UINTN Port, // rcx > +; IN UINTN Size, // rdx > +; OUT VOID *Buffer // r8 > +; ); > +;------------------------------------------------------------------------------ > +global ASM_PFX(IoReadFifo32) > +ASM_PFX(IoReadFifo32): > + xchg rcx, rdx > + xchg rdi, r8 ; rdi: buffer address; r8: save rdi > + > + call SevNoRepIo ; Check if we need to unroll String I/O > + test eax, eax > + jnz @IoReadFifo32_NoRep > + > + cld > + 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 > + > + call SevNoRepIo ; Check if we need to unroll String I/O > + 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 > + > + call SevNoRepIo ; Check if we need to unroll String I/O > + 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 > + > + call SevNoRepIo ; Check if we need to unroll String I/O > + 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 > + > diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc > index 2144979..56fb4cf 100644 > --- a/MdePkg/MdePkg.dsc > +++ b/MdePkg/MdePkg.dsc > @@ -3,6 +3,7 @@ > # > # Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.<BR> > # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> > +# Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR> > # > # This program and the accompanying materials > # are licensed and made available under the terms and conditions of the BSD License > @@ -134,6 +135,7 @@ > > [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 > -- > 2.7.4 > > _______________________________________________ > edk2-devel mailing list > edk2-devel@lists.01.org > https://lists.01.org/mailman/listinfo/edk2-devel _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
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