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author | Al Viro <viro@zeniv.linux.org.uk> | 2008-08-17 21:05:42 -0400 |
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committer | H. Peter Anvin <hpa@zytor.com> | 2008-10-22 22:55:20 -0700 |
commit | bb8985586b7a906e116db835c64773b7a7d51663 (patch) | |
tree | de93ae58e88cc563d95cc124a73f3930594c6100 /include/asm-x86/xsave.h | |
parent | 8ede0bdb63305d3353efd97e9af6210afb05734e (diff) | |
download | op-kernel-dev-bb8985586b7a906e116db835c64773b7a7d51663.zip op-kernel-dev-bb8985586b7a906e116db835c64773b7a7d51663.tar.gz |
x86, um: ... and asm-x86 move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'include/asm-x86/xsave.h')
-rw-r--r-- | include/asm-x86/xsave.h | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/include/asm-x86/xsave.h b/include/asm-x86/xsave.h deleted file mode 100644 index 08e9a1a..0000000 --- a/include/asm-x86/xsave.h +++ /dev/null @@ -1,118 +0,0 @@ -#ifndef __ASM_X86_XSAVE_H -#define __ASM_X86_XSAVE_H - -#include <linux/types.h> -#include <asm/processor.h> -#include <asm/i387.h> - -#define XSTATE_FP 0x1 -#define XSTATE_SSE 0x2 - -#define XSTATE_FPSSE (XSTATE_FP | XSTATE_SSE) - -#define FXSAVE_SIZE 512 - -/* - * These are the features that the OS can handle currently. - */ -#define XCNTXT_MASK (XSTATE_FP | XSTATE_SSE) - -#ifdef CONFIG_X86_64 -#define REX_PREFIX "0x48, " -#else -#define REX_PREFIX -#endif - -extern unsigned int xstate_size; -extern u64 pcntxt_mask; -extern struct xsave_struct *init_xstate_buf; - -extern void xsave_cntxt_init(void); -extern void xsave_init(void); -extern int init_fpu(struct task_struct *child); -extern int check_for_xstate(struct i387_fxsave_struct __user *buf, - void __user *fpstate, - struct _fpx_sw_bytes *sw); - -static inline int xrstor_checking(struct xsave_struct *fx) -{ - int err; - - asm volatile("1: .byte " REX_PREFIX "0x0f,0xae,0x2f\n\t" - "2:\n" - ".section .fixup,\"ax\"\n" - "3: movl $-1,%[err]\n" - " jmp 2b\n" - ".previous\n" - _ASM_EXTABLE(1b, 3b) - : [err] "=r" (err) - : "D" (fx), "m" (*fx), "a" (-1), "d" (-1), "0" (0) - : "memory"); - - return err; -} - -static inline int xsave_user(struct xsave_struct __user *buf) -{ - int err; - __asm__ __volatile__("1: .byte " REX_PREFIX "0x0f,0xae,0x27\n" - "2:\n" - ".section .fixup,\"ax\"\n" - "3: movl $-1,%[err]\n" - " jmp 2b\n" - ".previous\n" - ".section __ex_table,\"a\"\n" - _ASM_ALIGN "\n" - _ASM_PTR "1b,3b\n" - ".previous" - : [err] "=r" (err) - : "D" (buf), "a" (-1), "d" (-1), "0" (0) - : "memory"); - if (unlikely(err) && __clear_user(buf, xstate_size)) - err = -EFAULT; - /* No need to clear here because the caller clears USED_MATH */ - return err; -} - -static inline int xrestore_user(struct xsave_struct __user *buf, u64 mask) -{ - int err; - struct xsave_struct *xstate = ((__force struct xsave_struct *)buf); - u32 lmask = mask; - u32 hmask = mask >> 32; - - __asm__ __volatile__("1: .byte " REX_PREFIX "0x0f,0xae,0x2f\n" - "2:\n" - ".section .fixup,\"ax\"\n" - "3: movl $-1,%[err]\n" - " jmp 2b\n" - ".previous\n" - ".section __ex_table,\"a\"\n" - _ASM_ALIGN "\n" - _ASM_PTR "1b,3b\n" - ".previous" - : [err] "=r" (err) - : "D" (xstate), "a" (lmask), "d" (hmask), "0" (0) - : "memory"); /* memory required? */ - return err; -} - -static inline void xrstor_state(struct xsave_struct *fx, u64 mask) -{ - u32 lmask = mask; - u32 hmask = mask >> 32; - - asm volatile(".byte " REX_PREFIX "0x0f,0xae,0x2f\n\t" - : : "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask) - : "memory"); -} - -static inline void xsave(struct task_struct *tsk) -{ - /* This, however, we can work around by forcing the compiler to select - an addressing mode that doesn't require extended registers. */ - __asm__ __volatile__(".byte " REX_PREFIX "0x0f,0xae,0x27" - : : "D" (&(tsk->thread.xstate->xsave)), - "a" (-1), "d"(-1) : "memory"); -} -#endif |