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| author | Lukas Wunner <lukas@wunner.de> | 2016-11-12 22:32:35 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-11-13 08:23:16 +0100 |
| commit | 3552fdf29f01e5a889e88202dc55b67aa6766620 (patch) | |
| tree | 9056eaf32ecad1662fd1cd2af9c1762e0fba1f81 /arch/arm64/include/asm | |
| parent | efi: Add device path parser (diff) | |
| download | linux-3552fdf29f01e5a889e88202dc55b67aa6766620.tar.xz linux-3552fdf29f01e5a889e88202dc55b67aa6766620.zip | |
efi: Allow bitness-agnostic protocol calls
We already have a macro to invoke boot services which on x86 adapts
automatically to the bitness of the EFI firmware: efi_call_early().
The macro allows sharing of functions across arches and bitness variants
as long as those functions only call boot services. However in practice
functions in the EFI stub contain a mix of boot services calls and
protocol calls.
Add an efi_call_proto() macro for bitness-agnostic protocol calls to
allow sharing more code across arches as well as deduplicating 32 bit
and 64 bit code paths.
On x86, implement it using a new efi_table_attr() macro for bitness-
agnostic table lookups. Refactor efi_call_early() to make use of the
same macro. (The resulting object code remains identical.)
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Jones <pjones@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20161112213237.8804-8-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm')
| -rw-r--r-- | arch/arm64/include/asm/efi.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h index a9e54aad15ef..771b3f0bc757 100644 --- a/arch/arm64/include/asm/efi.h +++ b/arch/arm64/include/asm/efi.h @@ -51,6 +51,9 @@ int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md); #define __efi_call_early(f, ...) f(__VA_ARGS__) #define efi_is_64bit() (true) +#define efi_call_proto(protocol, f, instance, ...) \ + ((protocol##_t *)instance)->f(instance, ##__VA_ARGS__) + #define alloc_screen_info(x...) &screen_info #define free_screen_info(x...) |