efi/arm/libstub: Make screen_info accessible to the UEFI stub
authorArd Biesheuvel <ard.biesheuvel@linaro.org>
Mon, 25 Apr 2016 20:06:53 +0000 (21:06 +0100)
committerIngo Molnar <mingo@kernel.org>
Thu, 28 Apr 2016 09:33:59 +0000 (11:33 +0200)
commit801820bee9bccb7c156af2b95c7208f428a06ae7
treee2d486dc835f643ffa966d7b499f2ef17d3f1d7b
parent57fdb89aeb7b0e3aab19847ab7399e5d76f11e6f
efi/arm/libstub: Make screen_info accessible to the UEFI stub

In order to hand over the framebuffer described by the GOP protocol and
discovered by the UEFI stub, make struct screen_info accessible by the
stub. This involves allocating a loader data buffer and passing it to the
kernel proper via a UEFI Configuration Table, since the UEFI stub executes
in the context of the decompressor, and cannot access the kernel's copy of
struct screen_info directly.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Borislav Petkov <bp@alien8.de>
Cc: David Herrmann <dh.herrmann@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Jones <pjones@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/1461614832-17633-22-git-send-email-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/arm/include/asm/efi.h
arch/arm/kernel/setup.c
drivers/firmware/efi/arm-init.c
drivers/firmware/efi/efi.c
drivers/firmware/efi/libstub/arm32-stub.c
include/linux/efi.h