[PATCH][v2 1/3] x86: Export FPU API for KVM use

From: Sheng Yang
Date: Mon May 17 2010 - 05:24:47 EST


Also add some constants.

Signed-off-by: Sheng Yang <sheng@xxxxxxxxxxxxxxx>
---
arch/x86/include/asm/i387.h | 2 ++
arch/x86/include/asm/xsave.h | 3 +++
arch/x86/kernel/i387.c | 3 ++-
arch/x86/kernel/process.c | 1 +
4 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/arch/x86/include/asm/i387.h b/arch/x86/include/asm/i387.h
index 8002e9c..9610628 100644
--- a/arch/x86/include/asm/i387.h
+++ b/arch/x86/include/asm/i387.h
@@ -488,6 +488,8 @@ 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
diff --git a/arch/x86/include/asm/xsave.h b/arch/x86/include/asm/xsave.h
index 2c4390c..29ee4e4 100644
--- a/arch/x86/include/asm/xsave.h
+++ b/arch/x86/include/asm/xsave.h
@@ -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.
*/
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index 86cef6b..c4444bc 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -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
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 8bcc21f..0f331f4 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -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)
{
--
1.7.0.1

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