Messages in this thread | | | Subject | Re: [PATCHv3 0/4] Fix ACPI BGRT support for images located in EFI boot services memory | From | Matt Fleming <> | Date | Fri, 14 Sep 2012 13:46:32 +0100 |
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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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