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-rw-r--r--arch/x86/include/asm/fpu-internal.h10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h
index e97622f57722..0dbc08282291 100644
--- a/arch/x86/include/asm/fpu-internal.h
+++ b/arch/x86/include/asm/fpu-internal.h
@@ -207,7 +207,7 @@ static inline void fpu_fxsave(struct fpu *fpu)
207 if (config_enabled(CONFIG_X86_32)) 207 if (config_enabled(CONFIG_X86_32))
208 asm volatile( "fxsave %[fx]" : [fx] "=m" (fpu->state->fxsave)); 208 asm volatile( "fxsave %[fx]" : [fx] "=m" (fpu->state->fxsave));
209 else if (config_enabled(CONFIG_AS_FXSAVEQ)) 209 else if (config_enabled(CONFIG_AS_FXSAVEQ))
210 asm volatile("fxsaveq %0" : "=m" (fpu->state->fxsave)); 210 asm volatile("fxsaveq %[fx]" : [fx] "=m" (fpu->state->fxsave));
211 else { 211 else {
212 /* Using "rex64; fxsave %0" is broken because, if the memory 212 /* Using "rex64; fxsave %0" is broken because, if the memory
213 * operand uses any extended registers for addressing, a second 213 * operand uses any extended registers for addressing, a second
@@ -290,9 +290,11 @@ static inline int fpu_restore_checking(struct fpu *fpu)
290 290
291static inline int restore_fpu_checking(struct task_struct *tsk) 291static inline int restore_fpu_checking(struct task_struct *tsk)
292{ 292{
293 /* AMD K7/K8 CPUs don't save/restore FDP/FIP/FOP unless an exception 293 /*
294 is pending. Clear the x87 state here by setting it to fixed 294 * AMD K7/K8 CPUs don't save/restore FDP/FIP/FOP unless an exception is
295 values. "m" is a random variable that should be in L1 */ 295 * pending. Clear the x87 state here by setting it to fixed values.
296 * "m" is a random variable that should be in L1.
297 */
296 if (unlikely(static_cpu_has_bug_safe(X86_BUG_FXSAVE_LEAK))) { 298 if (unlikely(static_cpu_has_bug_safe(X86_BUG_FXSAVE_LEAK))) {
297 asm volatile( 299 asm volatile(
298 "fnclex\n\t" 300 "fnclex\n\t"