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| author | Lukas Wunner <lukas@wunner.de> | 2016-11-12 21:32:35 +0000 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-11-13 08:23:16 +0100 |
| commit | 3552fdf29f01e5a889e88202dc55b67aa6766620 (patch) | |
| tree | 9056eaf32ecad1662fd1cd2af9c1762e0fba1f81 /arch/arm/include | |
| parent | 46cd4b75cd0edee76e0096225c2d31f8d90e92a2 (diff) | |
| download | linux-3552fdf29f01e5a889e88202dc55b67aa6766620.tar.bz2 | |
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/arm/include')
| -rw-r--r-- | arch/arm/include/asm/efi.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/include/asm/efi.h b/arch/arm/include/asm/efi.h index 766bf9b78160..0b06f5341b45 100644 --- a/arch/arm/include/asm/efi.h +++ b/arch/arm/include/asm/efi.h @@ -57,6 +57,9 @@ void efi_virtmap_unload(void); #define __efi_call_early(f, ...) f(__VA_ARGS__) #define efi_is_64bit() (false) +#define efi_call_proto(protocol, f, instance, ...) \ + ((protocol##_t *)instance)->f(instance, ##__VA_ARGS__) + struct screen_info *alloc_screen_info(efi_system_table_t *sys_table_arg); void free_screen_info(efi_system_table_t *sys_table, struct screen_info *si); |