Reviewed-by: Michael D Kinney <michael.d.kin...@intel.com>
Please include Cc tags in commit message with the maintainers of
the patch for review. Otherwise, the maintainers may miss the
email patches.
Thanks,
Mike
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Zhiquan
> Li
> Sent: Thursday, January 11, 2024 10:02 PM
> To: devel@edk2.groups.io
> Cc: Li, Zhiquan1 <zhiquan1...@intel.com>
> Subject: [edk2-devel] [PATCH] MdePkg: fix the types of casting for TD
> MMIO read
>
> Currently the types of casting mismatch with TD MMIO read 1, 2 and 4
> bytes, that might introduce potential issues. So fix the types as
> conventional MmioRead[8|16|32] does.
>
> Signed-off-by: Zhiquan Li <zhiquan1...@intel.com>
> ---
> MdePkg/Library/BaseIoLibIntrinsic/IoLibInternalTdx.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/MdePkg/Library/BaseIoLibIntrinsic/IoLibInternalTdx.c
> b/MdePkg/Library/BaseIoLibIntrinsic/IoLibInternalTdx.c
> index ec837f5eb03e..1acc3b3d9638 100644
> --- a/MdePkg/Library/BaseIoLibIntrinsic/IoLibInternalTdx.c
> +++ b/MdePkg/Library/BaseIoLibIntrinsic/IoLibInternalTdx.c
> @@ -237,7 +237,7 @@ TdMmioRead8 (
>
>
> Status = TdVmCall (TDVMCALL_MMIO, TDVMCALL_ACCESS_SIZE_1,
> TDVMCALL_ACCESS_READ, Address | TdSharedPageMask (), 0, &Value);
>
> if (Status != 0) {
>
> - Value = *(volatile UINT64 *)Address;
>
> + Value = *(volatile UINT8 *)Address;
>
> }
>
>
>
> return (UINT8)Value;
>
> @@ -294,7 +294,7 @@ TdMmioRead16 (
>
>
> Status = TdVmCall (TDVMCALL_MMIO, TDVMCALL_ACCESS_SIZE_2,
> TDVMCALL_ACCESS_READ, Address | TdSharedPageMask (), 0, &Value);
>
> if (Status != 0) {
>
> - Value = *(volatile UINT64 *)Address;
>
> + Value = *(volatile UINT16 *)Address;
>
> }
>
>
>
> return (UINT16)Value;
>
> @@ -353,7 +353,7 @@ TdMmioRead32 (
>
>
> Status = TdVmCall (TDVMCALL_MMIO, TDVMCALL_ACCESS_SIZE_4,
> TDVMCALL_ACCESS_READ, Address | TdSharedPageMask (), 0, &Value);
>
> if (Status != 0) {
>
> - Value = *(volatile UINT64 *)Address;
>
> + Value = *(volatile UINT32 *)Address;
>
> }
>
>
>
> return (UINT32)Value;
>
> --
> 2.25.1
>
>
>
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