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OvmfPkg/QemuVideoDxe: round up FrameBufferSize to full page 

Guests do the same, because the framebuffer is mapped somewhere, which
obviously works with page granularity only.

When not rounding up to full page size we get messages like this one
(linux kernel):

    efifb: framebuffer at 0x80000000, using 1876k, total 1875k
                                            ^^^^^        ^^^^^
Also sysfb is confused and throws an error:

    sysfb: VRAM smaller than advertised

Cc: Phil Dennis-Jordan <phil@philjordan.eu>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
[lersek@redhat.com: fix coding style]
This commit is contained in:
Gerd Hoffmann 2018-04-26 09:02:07 +02:00 committed by Laszlo Ersek
parent e31fe995b8
commit dd7760470f
1 changed files with 6 additions and 0 deletions
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6
OvmfPkg/QemuVideoDxe/Gop.c
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@ -69,6 +69,9 @@ QemuVideoCompleteModeData (
Mode->FrameBufferBase = FrameBufDesc->AddrRangeMin;
Mode->FrameBufferSize = Info->HorizontalResolution * Info->VerticalResolution;
Mode->FrameBufferSize = Mode->FrameBufferSize * ((ModeData->ColorDepth + 7) / 8);
Mode->FrameBufferSize = EFI_PAGES_TO_SIZE (
EFI_SIZE_TO_PAGES (Mode->FrameBufferSize)
);
DEBUG ((EFI_D_INFO, "FrameBufferBase: 0x%Lx, FrameBufferSize: 0x%Lx\n",
Mode->FrameBufferBase, (UINT64)Mode->FrameBufferSize));
@ -107,6 +110,9 @@ QemuVideoVmwareSvgaCompleteModeData (
Mode->FrameBufferBase = FrameBufDesc->AddrRangeMin + FbOffset;
Mode->FrameBufferSize = BytesPerLine * Info->VerticalResolution;
Mode->FrameBufferSize = EFI_PAGES_TO_SIZE (
EFI_SIZE_TO_PAGES (Mode->FrameBufferSize)
);
FreePool (FrameBufDesc);
return Status;