Hi Abner,

Thank you for this patch.

I have a minor suggestion marked inline as [SAMI].

Regards,

Sami Mujawar


On 28/09/2021 09:31 AM, Abner Chang wrote:
Relocate QemuFwCfgLib to OvmfPkg/Library/QemuFwCfgLib and rename
it to QemuFwCfgLibMMIO, this library is leverage by both ARM and
RISC-V archs.

Signed-off-by: Abner Chang <abner.ch...@hpe.com>
Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org>
Cc: Leif Lindholm <l...@nuviainc.com>
Cc: Sami Mujawar <sami.muja...@arm.com>
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Jordan Justen <jordan.l.jus...@intel.com>
Cc: Gerd Hoffmann <kra...@redhat.com>
Cc: Daniel Schaefer <daniel.schae...@hpe.com>
Cc: Sunil V L <suni...@ventanamicro.com>
---
  ArmVirtPkg/ArmVirtQemu.dsc                                 | 2 +-
  ArmVirtPkg/ArmVirtQemuKernel.dsc                           | 2 +-
  .../Library/QemuFwCfgLib/QemuFwCfgLibMMIO.inf              | 5 ++---
  .../Library/QemuFwCfgLib/QemuFwCfgLibMMIO.c                | 7 ++++---
  4 files changed, 8 insertions(+), 8 deletions(-)
  rename ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.inf => 
OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMMIO.inf (87%)
  rename ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c => 
OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMMIO.c (93%)
[SAMI] Is it possible to rename QemuFwCfgLibMMIO.[c|inf] to QemuFwCfgMmioLib.[c|inf], please? This would then follow a pattern similar to OvmfPkg\Library\XenIoMmioLib\XenIoMmioLib.[c|inf].

diff --git a/ArmVirtPkg/ArmVirtQemu.dsc b/ArmVirtPkg/ArmVirtQemu.dsc
index 07f9699c79..6c949fd559 100644
--- a/ArmVirtPkg/ArmVirtQemu.dsc
+++ b/ArmVirtPkg/ArmVirtQemu.dsc
@@ -59,7 +59,7 @@
    # Virtio Support
    VirtioLib|OvmfPkg/Library/VirtioLib/VirtioLib.inf
    
VirtioMmioDeviceLib|OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDeviceLib.inf
-  QemuFwCfgLib|ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.inf
+  QemuFwCfgLib|OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMMIO.inf
    QemuFwCfgS3Lib|OvmfPkg/Library/QemuFwCfgS3Lib/BaseQemuFwCfgS3LibNull.inf
    
QemuFwCfgSimpleParserLib|OvmfPkg/Library/QemuFwCfgSimpleParserLib/QemuFwCfgSimpleParserLib.inf
    
QemuLoadImageLib|OvmfPkg/Library/GenericQemuLoadImageLib/GenericQemuLoadImageLib.inf
diff --git a/ArmVirtPkg/ArmVirtQemuKernel.dsc b/ArmVirtPkg/ArmVirtQemuKernel.dsc
index cf7a2b4463..64035a948d 100644
--- a/ArmVirtPkg/ArmVirtQemuKernel.dsc
+++ b/ArmVirtPkg/ArmVirtQemuKernel.dsc
@@ -57,7 +57,7 @@
    # Virtio Support
    VirtioLib|OvmfPkg/Library/VirtioLib/VirtioLib.inf
    
VirtioMmioDeviceLib|OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDeviceLib.inf
-  QemuFwCfgLib|ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.inf
+  QemuFwCfgLib|OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMMIO.inf
    QemuFwCfgS3Lib|OvmfPkg/Library/QemuFwCfgS3Lib/BaseQemuFwCfgS3LibNull.inf
    
QemuFwCfgSimpleParserLib|OvmfPkg/Library/QemuFwCfgSimpleParserLib/QemuFwCfgSimpleParserLib.inf
    
QemuLoadImageLib|OvmfPkg/Library/GenericQemuLoadImageLib/GenericQemuLoadImageLib.inf
diff --git a/ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.inf 
b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMMIO.inf
similarity index 87%
rename from ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.inf
rename to OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMMIO.inf
index f3cc827907..8101fac03f 100644
--- a/ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.inf
+++ b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMMIO.inf
@@ -23,17 +23,16 @@
  # The following information is for reference only and not required by the 
build
  # tools.
  #
-#  VALID_ARCHITECTURES           = ARM AARCH64
+#  VALID_ARCHITECTURES           = ARM AARCH64 RISCV64
  #
[Sources]
-  QemuFwCfgLib.c
+  QemuFwCfgLibMMIO.c
[Packages]
    MdePkg/MdePkg.dec
    OvmfPkg/OvmfPkg.dec
    EmbeddedPkg/EmbeddedPkg.dec
-  ArmVirtPkg/ArmVirtPkg.dec
[LibraryClasses]
    BaseLib
diff --git a/ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c 
b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMMIO.c
similarity index 93%
rename from ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c
rename to OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMMIO.c
index e2ac4108d1..b953f2eb6c 100644
--- a/ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c
+++ b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMMIO.c
@@ -4,6 +4,7 @@
Copyright (C) 2013 - 2014, Red Hat, Inc.
    Copyright (c) 2011 - 2013, Intel Corporation. All rights reserved.<BR>
+  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
  **/
@@ -239,7 +240,7 @@ MmioReadBytes (
    UINT8 *Ptr;
    UINT8 *End;
-#ifdef MDE_CPU_AARCH64
+#if defined(MDE_CPU_AARCH64) || defined(MDE_CPU_RISCV64)
    Left = Size & 7;
  #else
    Left = Size & 3;
@@ -249,7 +250,7 @@ MmioReadBytes (
    Ptr = Buffer;
    End = Ptr + Size;
-#ifdef MDE_CPU_AARCH64
+#if defined(MDE_CPU_AARCH64) || defined(MDE_CPU_RISCV64)
    while (Ptr < End) {
      *(UINT64 *)Ptr = MmioRead64 (mFwCfgDataAddress);
      Ptr += 8;
@@ -322,7 +323,7 @@ DmaTransferBytes (
    //
    // This will fire off the transfer.
    //
-#ifdef MDE_CPU_AARCH64
+#if defined(MDE_CPU_AARCH64) || defined(MDE_CPU_RISCV64)
    MmioWrite64 (mFwCfgDmaAddress, SwapBytes64 ((UINT64)&Access));
  #else
    MmioWrite32 ((UINT32)(mFwCfgDmaAddress + 4), SwapBytes32 ((UINT32)&Access));



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