diff options
| author | Fenghua Yu <fenghua.yu@intel.com> | 2014-05-29 11:12:41 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2014-05-29 14:33:04 -0700 |
| commit | f41d830fa890044cb60f6bb39fc8f6493ffebb47 (patch) | |
| tree | 1beb0fb5a035dbb4aecebc4edda386ddbfa68d03 /arch/x86/include/asm/fpu-internal.h | |
| parent | adb9d526e98268b647a74726346e1c40e6a37d2e (diff) | |
x86/xsaves: Save xstate to task's xsave area in __save_fpu during booting time
__save_fpu() can be called during early booting time when cpu caps are not
enabled and alternative can not be used yet. Therefore, it calls
xsave_state_booting() during booting time to save xstate to task's xsave area.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1401387164-43416-14-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/include/asm/fpu-internal.h')
| -rw-r--r-- | arch/x86/include/asm/fpu-internal.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h index cea1c76d49b..6099c0e5b62 100644 --- a/arch/x86/include/asm/fpu-internal.h +++ b/arch/x86/include/asm/fpu-internal.h @@ -508,9 +508,12 @@ static inline void user_fpu_begin(void) static inline void __save_fpu(struct task_struct *tsk) { - if (use_xsave()) - xsave_state(&tsk->thread.fpu.state->xsave, -1); - else + if (use_xsave()) { + if (unlikely(system_state == SYSTEM_BOOTING)) + xsave_state_booting(&tsk->thread.fpu.state->xsave, -1); + else + xsave_state(&tsk->thread.fpu.state->xsave, -1); + } else fpu_fxsave(&tsk->thread.fpu); } |