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    SubjectRe: [PATCHv3 0/4] Fix ACPI BGRT support for images located in EFI boot services memory
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    On Sat, 2012-09-08 at 15:06 -0700, Josh Triplett wrote:
    > The ACPI BGRT lets the OS access the BIOS logo image and its position on the
    > screen at boot time, allowing it to maintain that image on the screen until
    > ready to display something else, making boot more seamless. This series fixes
    > support for accessing the boot logo image via the BGRT when the BIOS stores it
    > in EFI boot services memory, as recommended by the ACPI 5.0 spec. Linux needs
    > to copy the image out of boot services memory before reclaiming boot services
    > memory.
    >
    > The first patch cleans up the existing x86-specific efi_enter_virtual_mode
    > function to have a stub version on non-x86 platforms, to eliminate an ifdef in
    > init/main.c. The second patch refactors EFI initialization to defer freeing
    > boot services memory until much later in the boot process, and in particular
    > until after we have ACPI available. The third patch adds a helper function to
    > look up existing EFI boot services mappings, to avoid re-mapping them. The
    > fourth patch moves BGRT initialization to before the reclamation of boot
    > services memory, copies the logo at that point, and reworks the existing BGRT
    > driver to use that existing copy.
    >
    > v2: Made the new internal function efi_unmap_memmap static. Incorporated
    > feedback from H. Peter Anvin and Matt Fleming: added stubs for
    > x86-specific EFI functions called from init/main.c to eliminate the
    > corresponding ifdefs in start_kernel; deferred
    > efi_free_boot_services even later, to just before free_initmem.
    >
    > v3: Moved efi_free_boot_services back to right after EFI initialization, to
    > avoid a WARN from check_early_ioremap_leak about not calling
    > early_iounmap soon enough.
    >
    > Josh Triplett (4):
    > efi: Add a stub for efi_enter_virtual_mode on non-x86
    > efi: Defer freeing boot services memory until after ACPI init
    > efi: Add a function to look up existing IO memory mappings
    > efi: Fix the ACPI BGRT driver for images located in EFI boot services
    > memory

    I thought I'd replied to this but I can't find it anywhere. I think my
    MUA ate my ACK.

    Acked-by: Matt Fleming <matt.fleming@intel.com>



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