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* [PATCH v8] MdePkg: BaseIoLibIntrinsic (IoLib class) library
@ 2017-04-12 14:55 Leo Duran
  2017-04-12 14:55 ` Leo Duran
  0 siblings, 1 reply; 3+ messages in thread
From: Leo Duran @ 2017-04-12 14:55 UTC (permalink / raw)
  To: edk2-devel; +Cc: Leo Duran

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.

This patch follows the series "[PATCH v3 00/10] IoLib class library",
which has already being pushed upstream.

Changes since v7:
- Wrap ASM_PFX() around function names on 'call' instructions.

Leo Duran (1):
  MdePkg: BaseIoLibIntrinsic (IoLib class) library

 .../BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf   |  59 ++++
 .../Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm | 299 +++++++++++++++++++++
 .../Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm  | 288 ++++++++++++++++++++
 MdePkg/MdePkg.dsc                                  |   1 +
 4 files changed, 647 insertions(+)
 create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf
 create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm
 create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm

-- 
2.7.4



^ permalink raw reply	[flat|nested] 3+ messages in thread

* [PATCH v8] MdePkg: BaseIoLibIntrinsic (IoLib class) library
  2017-04-12 14:55 [PATCH v8] MdePkg: BaseIoLibIntrinsic (IoLib class) library Leo Duran
@ 2017-04-12 14:55 ` Leo Duran
  2017-04-13  5:23   ` Gao, Liming
  0 siblings, 1 reply; 3+ messages in thread
From: Leo Duran @ 2017-04-12 14:55 UTC (permalink / raw)
  To: edk2-devel; +Cc: Leo Duran, Michael D Kinney, Liming Gao, Brijesh Singh

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>
---
 .../BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf   |  59 ++++
 .../Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm | 299 +++++++++++++++++++++
 .../Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm  | 288 ++++++++++++++++++++
 MdePkg/MdePkg.dsc                                  |   1 +
 4 files changed, 647 insertions(+)
 create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf
 create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm
 create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm

diff --git a/MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf b/MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf
new file mode 100644
index 0000000..0eec896
--- /dev/null
+++ b/MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf
@@ -0,0 +1,59 @@
+## @file
+#  Instance of I/O Library using compiler intrinsics.
+#
+#  I/O Library that uses compiler intrinsics to perform IN and OUT instructions
+#  for IA-32 and x64.
+#
+#  Copyright (c) 2007 - 2015, 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
+#  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.
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = BaseIoLibIntrinsicSev
+  MODULE_UNI_FILE                = BaseIoLibIntrinsic.uni
+  FILE_GUID                      = 93742f95-6e71-4581-b600-8e1da443f95a
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = IoLib 
+
+
+#
+#  VALID_ARCHITECTURES           = IA32 X64
+#
+
+[Sources]
+  IoLibMmioBuffer.c
+  BaseIoLibIntrinsicInternal.h
+  IoHighLevel.c
+
+[Sources.IA32]
+  IoLibGcc.c    | GCC
+  IoLibMsc.c    | MSFT
+  IoLibIcc.c    | INTEL
+  IoLib.c
+  Ia32/IoFifoSev.nasm
+
+[Sources.X64]
+  IoLibGcc.c    | GCC
+  IoLibMsc.c    | MSFT
+  IoLibIcc.c    | INTEL
+  IoLib.c
+  X64/IoFifoSev.nasm
+
+[Packages]
+  MdePkg/MdePkg.dec
+
+[LibraryClasses]
+  DebugLib
+  BaseLib
+
diff --git a/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm b/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm
new file mode 100644
index 0000000..3e80c17
--- /dev/null
+++ b/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm
@@ -0,0 +1,299 @@
+;------------------------------------------------------------------------------
+;
+; 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]
+
+    ; Check if we need to unroll String I/O
+    call    ASM_PFX(SevNoRepIo)
+    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]
+
+    ; Check if we need to unroll String I/O
+    call    ASM_PFX(SevNoRepIo)
+    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]
+
+    ; Check if we need to unroll String I/O
+    call    ASM_PFX(SevNoRepIo)
+    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]
+
+    ; 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:
+    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]
+
+    ; 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:
+    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]
+
+    ; 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:
+    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..26e0166
--- /dev/null
+++ b/MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm
@@ -0,0 +1,288 @@
+;------------------------------------------------------------------------------
+;
+; 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
+
+    ; Check if we need to unroll String I/O
+    call    ASM_PFX(SevNoRepIo)
+    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
+
+    ; Check if we need to unroll String I/O
+    call    ASM_PFX(SevNoRepIo)
+    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
+
+    ; Check if we need to unroll String I/O
+    call    ASM_PFX(SevNoRepIo)
+    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
+
+    ; 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
+
diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc
index 2144979..8b69de3 100644
--- a/MdePkg/MdePkg.dsc
+++ b/MdePkg/MdePkg.dsc
@@ -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
-- 
2.7.4



^ permalink raw reply related	[flat|nested] 3+ messages in thread

* Re: [PATCH v8] MdePkg: BaseIoLibIntrinsic (IoLib class) library
  2017-04-12 14:55 ` Leo Duran
@ 2017-04-13  5:23   ` Gao, Liming
  0 siblings, 0 replies; 3+ messages in thread
From: Gao, Liming @ 2017-04-13  5:23 UTC (permalink / raw)
  To: Leo Duran, edk2-devel@ml01.01.org; +Cc: Kinney, Michael D, Brijesh Singh

Push edk2 at b6d11d7c467810ea7f2e2eda46ef0bdc57bf1475. 

>-----Original Message-----
>From: Leo Duran [mailto:leo.duran@amd.com]
>Sent: Wednesday, April 12, 2017 10:55 PM
>To: edk2-devel@ml01.01.org
>Cc: Leo Duran <leo.duran@amd.com>; Kinney, Michael D
><michael.d.kinney@intel.com>; Gao, Liming <liming.gao@intel.com>; Brijesh
>Singh <brijesh.singh@amd.com>
>Subject: [PATCH v8] 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>
>---
> .../BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf   |  59 ++++
> .../Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm | 299
>+++++++++++++++++++++
> .../Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm  | 288
>++++++++++++++++++++
> MdePkg/MdePkg.dsc                                  |   1 +
> 4 files changed, 647 insertions(+)
> create mode 100644
>MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf
> create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm
> create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm
>
>diff --git a/MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf
>b/MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf
>new file mode 100644
>index 0000000..0eec896
>--- /dev/null
>+++ b/MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf
>@@ -0,0 +1,59 @@
>+## @file
>+#  Instance of I/O Library using compiler intrinsics.
>+#
>+#  I/O Library that uses compiler intrinsics to perform IN and OUT instructions
>+#  for IA-32 and x64.
>+#
>+#  Copyright (c) 2007 - 2015, 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
>+#  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.
>+#
>+##
>+
>+[Defines]
>+  INF_VERSION                    = 0x00010005
>+  BASE_NAME                      = BaseIoLibIntrinsicSev
>+  MODULE_UNI_FILE                = BaseIoLibIntrinsic.uni
>+  FILE_GUID                      = 93742f95-6e71-4581-b600-8e1da443f95a
>+  MODULE_TYPE                    = BASE
>+  VERSION_STRING                 = 1.0
>+  LIBRARY_CLASS                  = IoLib
>+
>+
>+#
>+#  VALID_ARCHITECTURES           = IA32 X64
>+#
>+
>+[Sources]
>+  IoLibMmioBuffer.c
>+  BaseIoLibIntrinsicInternal.h
>+  IoHighLevel.c
>+
>+[Sources.IA32]
>+  IoLibGcc.c    | GCC
>+  IoLibMsc.c    | MSFT
>+  IoLibIcc.c    | INTEL
>+  IoLib.c
>+  Ia32/IoFifoSev.nasm
>+
>+[Sources.X64]
>+  IoLibGcc.c    | GCC
>+  IoLibMsc.c    | MSFT
>+  IoLibIcc.c    | INTEL
>+  IoLib.c
>+  X64/IoFifoSev.nasm
>+
>+[Packages]
>+  MdePkg/MdePkg.dec
>+
>+[LibraryClasses]
>+  DebugLib
>+  BaseLib
>+
>diff --git a/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm
>b/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm
>new file mode 100644
>index 0000000..3e80c17
>--- /dev/null
>+++ b/MdePkg/Library/BaseIoLibIntrinsic/Ia32/IoFifoSev.nasm
>@@ -0,0 +1,299 @@
>+;------------------------------------------------------------------------------
>+;
>+; 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]
>+
>+    ; Check if we need to unroll String I/O
>+    call    ASM_PFX(SevNoRepIo)
>+    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]
>+
>+    ; Check if we need to unroll String I/O
>+    call    ASM_PFX(SevNoRepIo)
>+    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]
>+
>+    ; Check if we need to unroll String I/O
>+    call    ASM_PFX(SevNoRepIo)
>+    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]
>+
>+    ; 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:
>+    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]
>+
>+    ; 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:
>+    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]
>+
>+    ; 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:
>+    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..26e0166
>--- /dev/null
>+++ b/MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm
>@@ -0,0 +1,288 @@
>+;------------------------------------------------------------------------------
>+;
>+; 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
>+
>+    ; Check if we need to unroll String I/O
>+    call    ASM_PFX(SevNoRepIo)
>+    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
>+
>+    ; Check if we need to unroll String I/O
>+    call    ASM_PFX(SevNoRepIo)
>+    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
>+
>+    ; Check if we need to unroll String I/O
>+    call    ASM_PFX(SevNoRepIo)
>+    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
>+
>+    ; 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
>+
>diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc
>index 2144979..8b69de3 100644
>--- a/MdePkg/MdePkg.dsc
>+++ b/MdePkg/MdePkg.dsc
>@@ -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
>--
>2.7.4



^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2017-04-13  5:24 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2017-04-12 14:55 [PATCH v8] MdePkg: BaseIoLibIntrinsic (IoLib class) library Leo Duran
2017-04-12 14:55 ` Leo Duran
2017-04-13  5:23   ` Gao, Liming

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