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| author | Ard Biesheuvel <ardb@kernel.org> | 2019-12-24 18:10:12 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-12-25 12:49:19 +0300 |
| commit | 8f24f8c2fc82f701866419dcb594e2cc1d3f46ba (patch) | |
| tree | 78911f8dba19edd090d65649482291b11e10ca1b /arch/x86/Kconfig | |
| parent | 960a8d01834eabc4549928c60f8ce0300ad08519 (diff) | |
| download | linux-8f24f8c2fc82f701866419dcb594e2cc1d3f46ba.tar.xz | |
efi/libstub: Annotate firmware routines as __efiapi
Annotate all the firmware routines (boot services, runtime services and
protocol methods) called in the boot context as __efiapi, and make
it expand to __attribute__((ms_abi)) on 64-bit x86. This allows us
to use the compiler to generate the calls into firmware that use the
MS calling convention instead of the SysV one.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Cc: Arvind Sankar <nivedita@alum.mit.edu>
Cc: Borislav Petkov <bp@alien8.de>
Cc: James Morse <james.morse@arm.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: https://lkml.kernel.org/r/20191224151025.32482-13-ardb@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 5e8949953660..ded73bb5c0dd 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1991,11 +1991,12 @@ config EFI platforms. config EFI_STUB - bool "EFI stub support" - depends on EFI && !X86_USE_3DNOW - select RELOCATABLE - ---help--- - This kernel feature allows a bzImage to be loaded directly + bool "EFI stub support" + depends on EFI && !X86_USE_3DNOW + depends on $(cc-option,-mabi=ms) || X86_32 + select RELOCATABLE + ---help--- + This kernel feature allows a bzImage to be loaded directly by EFI firmware without the use of a bootloader. See Documentation/admin-guide/efi-stub.rst for more information. |