Commit-ID: e84611fc96c67d3a073e327be44d0f9ee3e981ef
Gitweb: http://git.kernel.org/tip/e84611fc96c67d3a073e327be44d0f9ee3e981ef
Author: Ingo Molnar <mingo@xxxxxxxxxx>
AuthorDate: Sat, 25 Apr 2015 06:41:07 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 19 May 2015 15:47:39 +0200
x86/fpu: Move CPU capability check into fpu__init_cpu_xstate()
fpu__init_system_xstate() does an FPU capability check that is better
done in fpu__init_cpu_xstate(). This will allow us to call
fpu__init_cpu_xstate() directly on legacy CPUs as well.
Reviewed-by: Borislav Petkov <bp@xxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/kernel/fpu/xsave.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/fpu/xsave.c b/arch/x86/kernel/fpu/xsave.c
index 961c258..0610f43 100644
--- a/arch/x86/kernel/fpu/xsave.c
+++ b/arch/x86/kernel/fpu/xsave.c
@@ -465,7 +465,7 @@ static void prepare_fx_sw_frame(void)
*/
void fpu__init_cpu_xstate(void)
{
- if (!xfeatures_mask)
+ if (!cpu_has_xsave || !xfeatures_mask)
return;
cr4_set_bits(X86_CR4_OSXSAVE);
--
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