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| author | Avi Kivity <avi@redhat.com> | 2010-05-06 11:45:46 +0300 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-05-10 10:48:55 -0700 |
| commit | 86603283326c9e95e5ad4e9fdddeec93cac5d9ad (patch) | |
| tree | 1a26a37434e920f9519b547814a1a9af35022de8 /arch/x86/include/asm/xsave.h | |
| parent | c9ad488289144ae5ef53b012e15895ef1f5e4bb6 (diff) | |
| download | op-kernel-dev-86603283326c9e95e5ad4e9fdddeec93cac5d9ad.zip op-kernel-dev-86603283326c9e95e5ad4e9fdddeec93cac5d9ad.tar.gz | |
x86: Introduce 'struct fpu' and related API
Currently all fpu state access is through tsk->thread.xstate. Since we wish
to generalize fpu access to non-task contexts, wrap the state in a new
'struct fpu' and convert existing access to use an fpu API.
Signal frame handlers are not converted to the API since they will remain
task context only things.
Signed-off-by: Avi Kivity <avi@redhat.com>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <1273135546-29690-3-git-send-email-avi@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/include/asm/xsave.h')
| -rw-r--r-- | arch/x86/include/asm/xsave.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/x86/include/asm/xsave.h b/arch/x86/include/asm/xsave.h index ddc04cc..2c4390c 100644 --- a/arch/x86/include/asm/xsave.h +++ b/arch/x86/include/asm/xsave.h @@ -37,8 +37,9 @@ 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) +static inline int fpu_xrstor_checking(struct fpu *fpu) { + struct xsave_struct *fx = &fpu->state->xsave; int err; asm volatile("1: .byte " REX_PREFIX "0x0f,0xae,0x2f\n\t" @@ -110,12 +111,12 @@ static inline void xrstor_state(struct xsave_struct *fx, u64 mask) : "memory"); } -static inline void xsave(struct task_struct *tsk) +static inline void fpu_xsave(struct fpu *fpu) { /* 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)), + : : "D" (&(fpu->state->xsave)), "a" (-1), "d"(-1) : "memory"); } #endif |
