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| author | Ricardo Neri <ricardo.neri-calderon@linux.intel.com> | 2014-03-27 15:10:42 -0700 |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2014-04-17 13:26:32 +0100 |
| commit | de05764e0b2a3d9559e099a2e134f8cef4500fdd (patch) | |
| tree | cc42a9d42aad04402b2fdeecfbd8010fc17b1b97 /arch/x86/include/asm/efi.h | |
| parent | 982e239cd2c73d2c70e14615a42c0c7391415a44 (diff) | |
| download | linux-0-day-de05764e0b2a3d9559e099a2e134f8cef4500fdd.tar.gz linux-0-day-de05764e0b2a3d9559e099a2e134f8cef4500fdd.tar.xz | |
x86/efi: Save and restore FPU context around efi_calls (x86_64)
Do a complete FPU context save/restore around the EFI calls. This required
as runtime EFI firmware may potentially use the FPU.
This change covers only the x86_64 configuration.
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'arch/x86/include/asm/efi.h')
| -rw-r--r-- | arch/x86/include/asm/efi.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h index 19292e7cae580..0b19187cc8826 100644 --- a/arch/x86/include/asm/efi.h +++ b/arch/x86/include/asm/efi.h @@ -1,6 +1,7 @@ #ifndef _ASM_X86_EFI_H #define _ASM_X86_EFI_H +#include <asm/i387.h> /* * We map the EFI regions needed for runtime services non-contiguously, * with preserved alignment on virtual addresses starting from -4G down @@ -54,7 +55,9 @@ extern u64 asmlinkage efi_call(void *fp, ...); \ efi_sync_low_kernel_mappings(); \ preempt_disable(); \ + __kernel_fpu_begin(); \ __s = efi_call((void *)efi.systab->runtime->f, __VA_ARGS__); \ + __kernel_fpu_end(); \ preempt_enable(); \ __s; \ }) |