diff options
| -rw-r--r-- | arch/x86/include/asm/i387.h | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/arch/x86/include/asm/i387.h b/arch/x86/include/asm/i387.h index 09a2d6dfd85b..7a6f21d95cf4 100644 --- a/arch/x86/include/asm/i387.h +++ b/arch/x86/include/asm/i387.h | |||
| @@ -75,14 +75,6 @@ static inline int fxrstor_checking(struct i387_fxsave_struct *fx) | |||
| 75 | return err; | 75 | return err; |
| 76 | } | 76 | } |
| 77 | 77 | ||
| 78 | static inline int restore_fpu_checking(struct task_struct *tsk) | ||
| 79 | { | ||
| 80 | if (task_thread_info(tsk)->status & TS_XSAVE) | ||
| 81 | return xrstor_checking(&tsk->thread.xstate->xsave); | ||
| 82 | else | ||
| 83 | return fxrstor_checking(&tsk->thread.xstate->fxsave); | ||
| 84 | } | ||
| 85 | |||
| 86 | /* AMD CPUs don't save/restore FDP/FIP/FOP unless an exception | 78 | /* AMD CPUs don't save/restore FDP/FIP/FOP unless an exception |
| 87 | is pending. Clear the x87 state here by setting it to fixed | 79 | is pending. Clear the x87 state here by setting it to fixed |
| 88 | values. The kernel data segment can be sometimes 0 and sometimes | 80 | values. The kernel data segment can be sometimes 0 and sometimes |
| @@ -185,10 +177,9 @@ static inline void tolerant_fwait(void) | |||
| 185 | asm volatile("fnclex ; fwait"); | 177 | asm volatile("fnclex ; fwait"); |
| 186 | } | 178 | } |
| 187 | 179 | ||
| 188 | static inline int restore_fpu_checking(struct task_struct *tsk) | 180 | /* perform fxrstor iff the processor has extended states, otherwise frstor */ |
| 181 | static inline int fxrstor_checking(struct i387_fxsave_struct *fx) | ||
| 189 | { | 182 | { |
| 190 | if (task_thread_info(tsk)->status & TS_XSAVE) | ||
| 191 | return xrstor_checking(&tsk->thread.xstate->xsave); | ||
| 192 | /* | 183 | /* |
| 193 | * The "nop" is needed to make the instructions the same | 184 | * The "nop" is needed to make the instructions the same |
| 194 | * length. | 185 | * length. |
| @@ -197,7 +188,8 @@ static inline int restore_fpu_checking(struct task_struct *tsk) | |||
| 197 | "nop ; frstor %1", | 188 | "nop ; frstor %1", |
| 198 | "fxrstor %1", | 189 | "fxrstor %1", |
| 199 | X86_FEATURE_FXSR, | 190 | X86_FEATURE_FXSR, |
| 200 | "m" (tsk->thread.xstate->fxsave)); | 191 | "m" (*fx)); |
| 192 | |||
| 201 | return 0; | 193 | return 0; |
| 202 | } | 194 | } |
| 203 | 195 | ||
| @@ -261,6 +253,14 @@ end: | |||
| 261 | 253 | ||
| 262 | #endif /* CONFIG_X86_64 */ | 254 | #endif /* CONFIG_X86_64 */ |
| 263 | 255 | ||
| 256 | static inline int restore_fpu_checking(struct task_struct *tsk) | ||
| 257 | { | ||
| 258 | if (task_thread_info(tsk)->status & TS_XSAVE) | ||
| 259 | return xrstor_checking(&tsk->thread.xstate->xsave); | ||
| 260 | else | ||
| 261 | return fxrstor_checking(&tsk->thread.xstate->fxsave); | ||
| 262 | } | ||
| 263 | |||
| 264 | /* | 264 | /* |
| 265 | * Signal frame handlers... | 265 | * Signal frame handlers... |
| 266 | */ | 266 | */ |
