Reviewed-by: Michael D Kinney
> -Original Message-
> From: Ni, Ray
> Sent: Tuesday, March 21, 2023 4:57 PM
> To: devel@edk2.groups.io
> Cc: Dong, Eric ; Kumar, Rahul R
> ; Gerd Hoffmann ; Kinney,
> Michael D ; Anadani, Ahmad
>
> Subject: [PATCH 4/6] UefiCpuPkg/CpuDxe: Refactor to use CPUID definitions
>
> The patch does not change any code behavior but only refactors by:
> * replaces the hardcode 0x8000 with CPUID_EXTENDED_FUNCTION
> * replaces the hardcode 0x8008 with CPUID_VIR_PHY_ADDRESS_SIZE
> * replace "UINT32 Eax" with
>"CPUID_VIR_PHY_ADDRESS_SIZE_EAX VirPhyAddressSize"
>
> Signed-off-by: Ray Ni
> Cc: Eric Dong
> Cc: Rahul Kumar
> Cc: Gerd Hoffmann
> Cc: Michael D Kinney
> Cc: Ahmad Anadani
> ---
> UefiCpuPkg/CpuDxe/CpuDxe.c | 18 --
> UefiCpuPkg/CpuDxe/CpuDxe.h | 3 ++-
> 2 files changed, 10 insertions(+), 11 deletions(-)
>
> diff --git a/UefiCpuPkg/CpuDxe/CpuDxe.c b/UefiCpuPkg/CpuDxe/CpuDxe.c
> index a6a91507f6..920976c576 100644
> --- a/UefiCpuPkg/CpuDxe/CpuDxe.c
> +++ b/UefiCpuPkg/CpuDxe/CpuDxe.c
> @@ -1,7 +1,7 @@
> /** @file
>
>CPU DXE Module to produce CPU ARCH Protocol.
>
>
>
> - Copyright (c) 2008 - 2022, Intel Corporation. All rights reserved.
>
> + Copyright (c) 2008 - 2023, Intel Corporation. All rights reserved.
>
>SPDX-License-Identifier: BSD-2-Clause-Patent
>
>
>
> **/
>
> @@ -505,20 +505,18 @@ InitializeMtrrMask (
>VOID
>
>)
>
> {
>
> - UINT32 RegEax;
>
> - UINT8 PhysicalAddressBits;
>
> + UINT32 MaxExtendedFunction;
>
> + CPUID_VIR_PHY_ADDRESS_SIZE_EAX VirPhyAddressSize;
>
>
>
> - AsmCpuid (0x8000, , NULL, NULL, NULL);
>
> + AsmCpuid (CPUID_EXTENDED_FUNCTION, , NULL, NULL, NULL);
>
>
>
> - if (RegEax >= 0x8008) {
>
> -AsmCpuid (0x8008, , NULL, NULL, NULL);
>
> -
>
> -PhysicalAddressBits = (UINT8)RegEax;
>
> + if (MaxExtendedFunction >= CPUID_VIR_PHY_ADDRESS_SIZE) {
>
> +AsmCpuid (CPUID_VIR_PHY_ADDRESS_SIZE, , NULL,
> NULL, NULL);
>
>} else {
>
> -PhysicalAddressBits = 36;
>
> +VirPhyAddressSize.Bits.PhysicalAddressBits = 36;
>
>}
>
>
>
> - mValidMtrrBitsMask= LShiftU64 (1, PhysicalAddressBits) - 1;
>
> + mValidMtrrBitsMask= LShiftU64 (1,
> VirPhyAddressSize.Bits.PhysicalAddressBits) - 1;
>
>mValidMtrrAddressMask = mValidMtrrBitsMask & 0xf000ULL;
>
> }
>
>
>
> diff --git a/UefiCpuPkg/CpuDxe/CpuDxe.h b/UefiCpuPkg/CpuDxe/CpuDxe.h
> index 49a390b4c4..0e7d88dd35 100644
> --- a/UefiCpuPkg/CpuDxe/CpuDxe.h
> +++ b/UefiCpuPkg/CpuDxe/CpuDxe.h
> @@ -1,7 +1,7 @@
> /** @file
>
>CPU DXE Module to produce CPU ARCH Protocol and CPU MP Protocol.
>
>
>
> - Copyright (c) 2008 - 2019, Intel Corporation. All rights reserved.
>
> + Copyright (c) 2008 - 2023, Intel Corporation. All rights reserved.
>
>SPDX-License-Identifier: BSD-2-Clause-Patent
>
>
>
> **/
>
> @@ -13,6 +13,7 @@
>
>
> #include
>
> #include
>
> +#include
>
> #include
>
>
>
> #include
>
> --
> 2.39.1.windows.1
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