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x86: Export FPU API for KVM use

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Also add some constants.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Sheng Yang 2010-05-17 17:22:23 +08:00 committed by Avi Kivity
parent 9373662463
commit 5ee481da7b
4 changed files with 8 additions and 1 deletions
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2
arch/x86/include/asm/i387.h
View File

@ -482,6 +482,8 @@ static inline void fpu_copy(struct fpu *dst, struct fpu *src)
memcpy(dst->state, src->state, xstate_size);
}
extern void fpu_finit(struct fpu *fpu);
#endif /* __ASSEMBLY__ */
#define PSHUFB_XMM5_XMM0 .byte 0x66, 0x0f, 0x38, 0x00, 0xc5

3
arch/x86/include/asm/xsave.h
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@ -13,6 +13,9 @@
#define FXSAVE_SIZE 512
#define XSTATE_YMM_SIZE 256
#define XSTATE_YMM_OFFSET (512 + 64)
/*
* These are the features that the OS can handle currently.
*/

3
arch/x86/kernel/i387.c
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@ -107,7 +107,7 @@ void __cpuinit fpu_init(void)
}
#endif /* CONFIG_X86_64 */
static void fpu_finit(struct fpu *fpu)
void fpu_finit(struct fpu *fpu)
{
#ifdef CONFIG_X86_32
if (!HAVE_HWFP) {
@ -132,6 +132,7 @@ static void fpu_finit(struct fpu *fpu)
fp->fos = 0xffff0000u;
}
}
EXPORT_SYMBOL_GPL(fpu_finit);
/*
* The _current_ task is using the FPU for the first time

1
arch/x86/kernel/process.c
View File

@ -28,6 +28,7 @@ unsigned long idle_nomwait;
EXPORT_SYMBOL(idle_nomwait);
struct kmem_cache *task_xstate_cachep;
EXPORT_SYMBOL_GPL(task_xstate_cachep);
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{