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 i386 configuration. Signed-off-by: Ricardo Neri <[email protected]> --- arch/x86/include/asm/efi.h | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h index fc99bd1..473969e 100644 --- a/arch/x86/include/asm/efi.h +++ b/arch/x86/include/asm/efi.h @@ -32,10 +32,23 @@ extern unsigned long asmlinkage efi_call_phys(void *, ...); /* Use this macro if your virtual returns a non-void value */ #define efi_call_virt(f, args...) \ - ((efi_##f##_t __attribute__((regparm(0)))*)efi.systab->runtime->f)(args) +({ \ + efi_status_t __s; \ + kernel_fpu_begin(); \ + __s = ((efi_##f##_t __attribute__((regparm(0)))*) \ + efi.systab->runtime->f)(args); \ + kernel_fpu_end(); \ + __s; \ +}) /* Use this macro if your virtual call does not return any value */ -#define __efi_call_virt(f, args...) efi_call_virt(f, args) +#define __efi_call_virt(f, args...) \ +({ \ + kernel_fpu_begin(); \ + ((efi_##f##_t __attribute__((regparm(0)))*) \ + efi.systab->runtime->f)(args); \ + kernel_fpu_end(); \ +}) #define efi_ioremap(addr, size, type, attr) ioremap_cache(addr, size) -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
