[PATCH V7 09/37] MdePkg: Support IoFifo for Tdx guest in BaseIoLibIntrinsic

["Min Xu" <min.m.xu@intel.com>]

RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429

Previously IoFifo functions are in X64/IoFifoSev.nasm which supports
both SEV guest and Legacy guest. IoLibFifo.c is introduced to support
SEV/TDX/Legacy guest in one binary. It checks the guest type in runtime
and call corresponding functions then.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
---
 .../BaseIoLibIntrinsicSev.inf                 |   2 +
 MdePkg/Library/BaseIoLibIntrinsic/IoLibFifo.c | 216 ++++++++++++++++++
 MdePkg/Library/BaseIoLibIntrinsic/IoLibSev.h  | 166 ++++++++++++++
 .../BaseIoLibIntrinsic/X64/IoFifoSev.nasm     |  34 +--
 4 files changed, 401 insertions(+), 17 deletions(-)
 create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/IoLibFifo.c
 create mode 100644 MdePkg/Library/BaseIoLibIntrinsic/IoLibSev.h

diff --git a/MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf b/MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf
index a74e54bee8b5..7fe1c60f046e 100644
--- a/MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf
+++ b/MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicSev.inf
@@ -31,6 +31,7 @@
   BaseIoLibIntrinsicInternal.h
   IoHighLevel.c
   IoLibTdx.h
+  IoLibSev.h
 
 [Sources.IA32]
   IoLibGcc.c    | GCC
@@ -44,6 +45,7 @@
   IoLibMsc.c    | MSFT
   IoLib.c
   IoLibInternalTdx.c
+  IoLibFifo.c
   X64/IoFifoSev.nasm
 
 [Packages]
diff --git a/MdePkg/Library/BaseIoLibIntrinsic/IoLibFifo.c b/MdePkg/Library/BaseIoLibIntrinsic/IoLibFifo.c
new file mode 100644
index 000000000000..08761a15a86c
--- /dev/null
+++ b/MdePkg/Library/BaseIoLibIntrinsic/IoLibFifo.c
@@ -0,0 +1,216 @@
+/** @file
+  IoFifo read/write routines.
+
+  Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "BaseIoLibIntrinsicInternal.h"
+#include "IoLibSev.h"
+#include "IoLibTdx.h"
+#include <Library/TdxLib.h>
+
+/**
+  Reads an 8-bit I/O port fifo into a block of memory.
+
+  Reads the 8-bit I/O fifo port specified by Port.
+  The port is read Count times, and the read data is
+  stored in the provided Buffer.
+
+  This function must guarantee that all I/O read and write operations are
+  serialized.
+
+  If 8-bit I/O port operations are not supported, then ASSERT().
+
+  In TDX a serial of TdIoRead8 is invoked to read the I/O port fifo.
+
+  @param  Port    The I/O port to read.
+  @param  Count   The number of times to read I/O port.
+  @param  Buffer  The buffer to store the read data into.
+
+**/
+VOID
+EFIAPI
+IoReadFifo8 (
+  IN      UINTN  Port,
+  IN      UINTN  Count,
+  OUT     VOID   *Buffer
+  )
+{
+  if (IsTdxGuest ()) {
+    TdIoReadFifo8 (Port, Count, Buffer);
+  } else {
+    SevIoReadFifo8 (Port, Count, Buffer);
+  }
+}
+
+/**
+  Writes a block of memory into an 8-bit I/O port fifo.
+
+  Writes the 8-bit I/O fifo port specified by Port.
+  The port is written Count times, and the write data is
+  retrieved from the provided Buffer.
+
+  This function must guarantee that all I/O write and write operations are
+  serialized.
+
+  If 8-bit I/O port operations are not supported, then ASSERT().
+
+  In TDX a serial of TdIoWrite8 is invoked to write data to the I/O port.
+
+  @param  Port    The I/O port to write.
+  @param  Count   The number of times to write I/O port.
+  @param  Buffer  The buffer to retrieve the write data from.
+
+**/
+VOID
+EFIAPI
+IoWriteFifo8 (
+  IN      UINTN  Port,
+  IN      UINTN  Count,
+  IN      VOID   *Buffer
+  )
+{
+  if (IsTdxGuest ()) {
+    TdIoWriteFifo8 (Port, Count, Buffer);
+  } else {
+    SevIoWriteFifo8 (Port, Count, Buffer);
+  }
+}
+
+/**
+  Reads a 16-bit I/O port fifo into a block of memory.
+
+  Reads the 16-bit I/O fifo port specified by Port.
+  The port is read Count times, and the read data is
+  stored in the provided Buffer.
+
+  This function must guarantee that all I/O read and write operations are
+  serialized.
+
+  If 16-bit I/O port operations are not supported, then ASSERT().
+
+  In TDX a serial of TdIoRead16 is invoked to read data from the I/O port.
+
+  @param  Port    The I/O port to read.
+  @param  Count   The number of times to read I/O port.
+  @param  Buffer  The buffer to store the read data into.
+
+**/
+VOID
+EFIAPI
+IoReadFifo16 (
+  IN      UINTN  Port,
+  IN      UINTN  Count,
+  OUT     VOID   *Buffer
+  )
+{
+  if (IsTdxGuest ()) {
+    TdIoReadFifo16 (Port, Count, Buffer);
+  } else {
+    SevIoReadFifo16 (Port, Count, Buffer);
+  }
+}
+
+/**
+  Writes a block of memory into a 16-bit I/O port fifo.
+
+  Writes the 16-bit I/O fifo port specified by Port.
+  The port is written Count times, and the write data is
+  retrieved from the provided Buffer.
+
+  This function must guarantee that all I/O write and write operations are
+  serialized.
+
+  If 16-bit I/O port operations are not supported, then ASSERT().
+
+  In TDX a serial of TdIoWrite16 is invoked to write data to the I/O port.
+
+  @param  Port    The I/O port to write.
+  @param  Count   The number of times to write I/O port.
+  @param  Buffer  The buffer to retrieve the write data from.
+
+**/
+VOID
+EFIAPI
+IoWriteFifo16 (
+  IN      UINTN  Port,
+  IN      UINTN  Count,
+  IN      VOID   *Buffer
+  )
+{
+  if (IsTdxGuest ()) {
+    TdIoWriteFifo16 (Port, Count, Buffer);
+  } else {
+    SevIoWriteFifo16 (Port, Count, Buffer);
+  }
+}
+
+/**
+  Reads a 32-bit I/O port fifo into a block of memory.
+
+  Reads the 32-bit I/O fifo port specified by Port.
+  The port is read Count times, and the read data is
+  stored in the provided Buffer.
+
+  This function must guarantee that all I/O read and write operations are
+  serialized.
+
+  If 32-bit I/O port operations are not supported, then ASSERT().
+
+  In TDX a serial of TdIoRead32 is invoked to read data from the I/O port.
+
+  @param  Port    The I/O port to read.
+  @param  Count   The number of times to read I/O port.
+  @param  Buffer  The buffer to store the read data into.
+
+**/
+VOID
+EFIAPI
+IoReadFifo32 (
+  IN      UINTN  Port,
+  IN      UINTN  Count,
+  OUT     VOID   *Buffer
+  )
+{
+  if (IsTdxGuest ()) {
+    TdIoReadFifo32 (Port, Count, Buffer);
+  } else {
+    SevIoReadFifo32 (Port, Count, Buffer);
+  }
+}
+
+/**
+  Writes a block of memory into a 32-bit I/O port fifo.
+
+  Writes the 32-bit I/O fifo port specified by Port.
+  The port is written Count times, and the write data is
+  retrieved from the provided Buffer.
+
+  This function must guarantee that all I/O write and write operations are
+  serialized.
+
+  If 32-bit I/O port operations are not supported, then ASSERT().
+
+  In TDX a serial of TdIoWrite32 is invoked to write data to the I/O port.
+
+  @param  Port    The I/O port to write.
+  @param  Count   The number of times to write I/O port.
+  @param  Buffer  The buffer to retrieve the write data from.
+
+**/
+VOID
+EFIAPI
+IoWriteFifo32 (
+  IN      UINTN  Port,
+  IN      UINTN  Count,
+  IN      VOID   *Buffer
+  )
+{
+  if (IsTdxGuest ()) {
+    TdIoWriteFifo32 (Port, Count, Buffer);
+  } else {
+    SevIoWriteFifo32 (Port, Count, Buffer);
+  }
+}
diff --git a/MdePkg/Library/BaseIoLibIntrinsic/IoLibSev.h b/MdePkg/Library/BaseIoLibIntrinsic/IoLibSev.h
new file mode 100644
index 000000000000..6d7cafcff27a
--- /dev/null
+++ b/MdePkg/Library/BaseIoLibIntrinsic/IoLibSev.h
@@ -0,0 +1,166 @@
+/** @file
+  Header file for SEV IO library.
+
+  Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef IOLIB_SEV_H_
+#define IOLIB_SEV_H_
+
+#include <Base.h>
+
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+
+/**
+  Reads an 8-bit I/O port fifo into a block of memory.
+
+  Reads the 8-bit I/O fifo port specified by Port.
+  The port is read Count times, and the read data is
+  stored in the provided Buffer.
+
+  This function must guarantee that all I/O read and write operations are
+  serialized.
+
+  If 8-bit I/O port operations are not supported, then ASSERT().
+
+  @param  Port    The I/O port to read.
+  @param  Count   The number of times to read I/O port.
+  @param  Buffer  The buffer to store the read data into.
+
+**/
+VOID
+EFIAPI
+SevIoReadFifo8 (
+  IN      UINTN  Port,
+  IN      UINTN  Count,
+  OUT     VOID   *Buffer
+  );
+
+/**
+  Writes a block of memory into an 8-bit I/O port fifo.
+
+  Writes the 8-bit I/O fifo port specified by Port.
+  The port is written Count times, and the write data is
+  retrieved from the provided Buffer.
+
+  This function must guarantee that all I/O write and write operations are
+  serialized.
+
+  If 8-bit I/O port operations are not supported, then ASSERT().
+
+  @param  Port    The I/O port to write.
+  @param  Count   The number of times to write I/O port.
+  @param  Buffer  The buffer to retrieve the write data from.
+
+**/
+VOID
+EFIAPI
+SevIoWriteFifo8 (
+  IN      UINTN  Port,
+  IN      UINTN  Count,
+  IN      VOID   *Buffer
+  );
+
+/**
+  Reads an 8-bit I/O port fifo into a block of memory.
+
+  Reads the 8-bit I/O fifo port specified by Port.
+  The port is read Count times, and the read data is
+  stored in the provided Buffer.
+
+  This function must guarantee that all I/O read and write operations are
+  serialized.
+
+  If 8-bit I/O port operations are not supported, then ASSERT().
+
+  @param  Port    The I/O port to read.
+  @param  Count   The number of times to read I/O port.
+  @param  Buffer  The buffer to store the read data into.
+
+**/
+VOID
+EFIAPI
+SevIoReadFifo16 (
+  IN      UINTN  Port,
+  IN      UINTN  Count,
+  OUT     VOID   *Buffer
+  );
+
+/**
+  Writes a block of memory into an 8-bit I/O port fifo.
+
+  Writes the 8-bit I/O fifo port specified by Port.
+  The port is written Count times, and the write data is
+  retrieved from the provided Buffer.
+
+  This function must guarantee that all I/O write and write operations are
+  serialized.
+
+  If 8-bit I/O port operations are not supported, then ASSERT().
+
+  @param  Port    The I/O port to write.
+  @param  Count   The number of times to write I/O port.
+  @param  Buffer  The buffer to retrieve the write data from.
+
+**/
+VOID
+EFIAPI
+SevIoWriteFifo16 (
+  IN      UINTN  Port,
+  IN      UINTN  Count,
+  IN      VOID   *Buffer
+  );
+
+/**
+  Reads an 8-bit I/O port fifo into a block of memory.
+
+  Reads the 8-bit I/O fifo port specified by Port.
+  The port is read Count times, and the read data is
+  stored in the provided Buffer.
+
+  This function must guarantee that all I/O read and write operations are
+  serialized.
+
+  If 8-bit I/O port operations are not supported, then ASSERT().
+
+  @param  Port    The I/O port to read.
+  @param  Count   The number of times to read I/O port.
+  @param  Buffer  The buffer to store the read data into.
+
+**/
+VOID
+EFIAPI
+SevIoReadFifo32 (
+  IN      UINTN  Port,
+  IN      UINTN  Count,
+  OUT     VOID   *Buffer
+  );
+
+/**
+  Writes a block of memory into an 8-bit I/O port fifo.
+
+  Writes the 8-bit I/O fifo port specified by Port.
+  The port is written Count times, and the write data is
+  retrieved from the provided Buffer.
+
+  This function must guarantee that all I/O write and write operations are
+  serialized.
+
+  If 8-bit I/O port operations are not supported, then ASSERT().
+
+  @param  Port    The I/O port to write.
+  @param  Count   The number of times to write I/O port.
+  @param  Buffer  The buffer to retrieve the write data from.
+
+**/
+VOID
+EFIAPI
+SevIoWriteFifo32 (
+  IN      UINTN  Port,
+  IN      UINTN  Count,
+  IN      VOID   *Buffer
+  );
+
+#endif
diff --git a/MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm b/MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm
index 106f8881c55c..d02286b4d518 100644
--- a/MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm
+++ b/MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifoSev.nasm
@@ -67,14 +67,14 @@ ASM_PFX(SevNoRepIo):
 ;------------------------------------------------------------------------------
 ;  VOID
 ;  EFIAPI
-;  IoReadFifo8 (
+;  SevIoReadFifo8 (
 ;    IN  UINTN                 Port,              // rcx
 ;    IN  UINTN                 Size,              // rdx
 ;    OUT VOID                  *Buffer            // r8
 ;    );
 ;------------------------------------------------------------------------------
-global ASM_PFX(IoReadFifo8)
-ASM_PFX(IoReadFifo8):
+global ASM_PFX(SevIoReadFifo8)
+ASM_PFX(SevIoReadFifo8):
     xchg    rcx, rdx
     xchg    rdi, r8             ; rdi: buffer address; r8: save rdi
 
@@ -103,14 +103,14 @@ ASM_PFX(IoReadFifo8):
 ;------------------------------------------------------------------------------
 ;  VOID
 ;  EFIAPI
-;  IoReadFifo16 (
+;  SevIoReadFifo16 (
 ;    IN  UINTN                 Port,              // rcx
 ;    IN  UINTN                 Size,              // rdx
 ;    OUT VOID                  *Buffer            // r8
 ;    );
 ;------------------------------------------------------------------------------
-global ASM_PFX(IoReadFifo16)
-ASM_PFX(IoReadFifo16):
+global ASM_PFX(SevIoReadFifo16)
+ASM_PFX(SevIoReadFifo16):
     xchg    rcx, rdx
     xchg    rdi, r8             ; rdi: buffer address; r8: save rdi
 
@@ -139,14 +139,14 @@ ASM_PFX(IoReadFifo16):
 ;------------------------------------------------------------------------------
 ;  VOID
 ;  EFIAPI
-;  IoReadFifo32 (
+;  SevIoReadFifo32 (
 ;    IN  UINTN                 Port,              // rcx
 ;    IN  UINTN                 Size,              // rdx
 ;    OUT VOID                  *Buffer            // r8
 ;    );
 ;------------------------------------------------------------------------------
-global ASM_PFX(IoReadFifo32)
-ASM_PFX(IoReadFifo32):
+global ASM_PFX(SevIoReadFifo32)
+ASM_PFX(SevIoReadFifo32):
     xchg    rcx, rdx
     xchg    rdi, r8             ; rdi: buffer address; r8: save rdi
 
@@ -181,8 +181,8 @@ ASM_PFX(IoReadFifo32):
 ;    IN VOID                   *Buffer            // r8
 ;    );
 ;------------------------------------------------------------------------------
-global ASM_PFX(IoWriteFifo8)
-ASM_PFX(IoWriteFifo8):
+global ASM_PFX(SevIoWriteFifo8)
+ASM_PFX(SevIoWriteFifo8):
     xchg    rcx, rdx
     xchg    rsi, r8             ; rsi: buffer address; r8: save rsi
 
@@ -211,14 +211,14 @@ ASM_PFX(IoWriteFifo8):
 ;------------------------------------------------------------------------------
 ;  VOID
 ;  EFIAPI
-;  IoWriteFifo16 (
+;  SevIoWriteFifo16 (
 ;    IN UINTN                  Port,              // rcx
 ;    IN UINTN                  Size,              // rdx
 ;    IN VOID                   *Buffer            // r8
 ;    );
 ;------------------------------------------------------------------------------
-global ASM_PFX(IoWriteFifo16)
-ASM_PFX(IoWriteFifo16):
+global ASM_PFX(SevIoWriteFifo16)
+ASM_PFX(SevIoWriteFifo16):
     xchg    rcx, rdx
     xchg    rsi, r8             ; rsi: buffer address; r8: save rsi
 
@@ -247,14 +247,14 @@ ASM_PFX(IoWriteFifo16):
 ;------------------------------------------------------------------------------
 ;  VOID
 ;  EFIAPI
-;  IoWriteFifo32 (
+;  SevIoWriteFifo32 (
 ;    IN UINTN                  Port,              // rcx
 ;    IN UINTN                  Size,              // rdx
 ;    IN VOID                   *Buffer            // r8
 ;    );
 ;------------------------------------------------------------------------------
-global ASM_PFX(IoWriteFifo32)
-ASM_PFX(IoWriteFifo32):
+global ASM_PFX(SevIoWriteFifo32)
+ASM_PFX(SevIoWriteFifo32):
     xchg    rcx, rdx
     xchg    rsi, r8             ; rsi: buffer address; r8: save rsi
 
-- 
2.29.2.windows.2