From 6025488da39314d21e2a075b6ecc8d26d36b37e7 Mon Sep 17 00:00:00 2001 From: Laszlo Ersek Date: Tue, 21 Feb 2017 13:56:48 +0100 Subject: [PATCH] OvmfPkg/AcpiPlatformDxe: update PointerValue comments in "BootScript.c" Commit df73df138d9d ("OvmfPkg/AcpiPlatformDxe: replay QEMU_LOADER_WRITE_POINTER commands at S3", 2017-02-09) added "BootScript.c" with such comments on the PointerValue field of CONDENSED_WRITE_POINTER, and on the corresponding PointerValue parameter of SaveCondensedWritePointerToS3Context(), that did not consider the then-latest update of the QEMU_LOADER_WRITE_POINTER structure. (Namely, the introduction of the PointeeOffset field.) The code is fine as-is -- ProcessCmdWritePointer() already calls SaveCondensedWritePointerToS3Context() correctly, and "BootScript.c" itself is indifferent to the exact values --, but the comments in "BootScript.c" should match reality too. Update them. Cc: Jordan Justen Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek Reviewed-by: Jordan Justen --- OvmfPkg/AcpiPlatformDxe/BootScript.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/OvmfPkg/AcpiPlatformDxe/BootScript.c b/OvmfPkg/AcpiPlatformDxe/BootScript.c index b7a7f270f2..1ad468e2f8 100644 --- a/OvmfPkg/AcpiPlatformDxe/BootScript.c +++ b/OvmfPkg/AcpiPlatformDxe/BootScript.c @@ -29,6 +29,7 @@ typedef struct { UINT8 PointerSize; // copied as-is from QEMU_LOADER_WRITE_POINTER UINT32 PointerOffset; // copied as-is from QEMU_LOADER_WRITE_POINTER UINT64 PointerValue; // resolved from QEMU_LOADER_WRITE_POINTER.PointeeFile + // and QEMU_LOADER_WRITE_POINTER.PointeeOffset } CONDENSED_WRITE_POINTER; @@ -159,7 +160,8 @@ ReleaseS3Context ( @param[in] PointerValue The base address of the allocated / downloaded fw_cfg blob that is identified by - QEMU_LOADER_WRITE_POINTER.PointeeFile. + QEMU_LOADER_WRITE_POINTER.PointeeFile, plus + QEMU_LOADER_WRITE_POINTER.PointeeOffset. @retval EFI_SUCCESS The information derived from QEMU_LOADER_WRITE_POINTER has been successfully @@ -271,9 +273,9 @@ TransferS3ContextToBootScript ( // (2) call QEMU with the FW_CFG_DMA_ACCESS object, // (3) wait for the select+skip to finish, // (4) restore a SCRATCH_BUFFER object in reserved memory that writes - // PointerValue (base address of the allocated / downloaded PointeeFile), - // of size PointerSize, into the fw_cfg file selected in (1), at the - // offset sought to in (1), + // PointerValue (base address of the allocated / downloaded PointeeFile, + // plus PointeeOffset), of size PointerSize, into the fw_cfg file + // selected in (1), at the offset sought to in (1), // (5) call QEMU with the FW_CFG_DMA_ACCESS object, // (6) wait for the write to finish. // @@ -346,8 +348,8 @@ TransferS3ContextToBootScript ( // // (4) restore a SCRATCH_BUFFER object in reserved memory that writes // PointerValue (base address of the allocated / downloaded - // PointeeFile), of size PointerSize, into the fw_cfg file selected in - // (1), at the offset sought to in (1), + // PointeeFile, plus PointeeOffset), of size PointerSize, into the + // fw_cfg file selected in (1), at the offset sought to in (1), // Access->Control = SwapBytes32 (FW_CFG_DMA_CTL_WRITE); Access->Length = SwapBytes32 (Condensed->PointerSize); -- 2.39.2