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| author | Thomas Gleixner <tglx@linutronix.de> | 2021-10-13 17:55:55 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-10-21 15:24:14 +0300 |
| commit | 49e4eb4125d506937e52e10c34c8cafd93ab0ed6 (patch) | |
| tree | 1fa7ef4a7fe827c6da8793fc9ba3ea84d7f592bd /arch/x86/kernel/fpu/xstate.h | |
| parent | 3ac8d75778fc8c1c22daad9bc674166b862f6f6e (diff) | |
| download | linux-49e4eb4125d506937e52e10c34c8cafd93ab0ed6.tar.xz | |
x86/fpu/xstate: Use fpstate for copy_uabi_to_xstate()
Prepare for dynamically enabled states per task. The function needs to
retrieve the features and sizes which are valid in a fpstate
context. Retrieve them from fpstate.
Move the function declarations to the core header as they are not
required anywhere else.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20211013145323.233529986@linutronix.de
Diffstat (limited to 'arch/x86/kernel/fpu/xstate.h')
| -rw-r--r-- | arch/x86/kernel/fpu/xstate.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kernel/fpu/xstate.h b/arch/x86/kernel/fpu/xstate.h index b74c5953558c..379dbfa4f526 100644 --- a/arch/x86/kernel/fpu/xstate.h +++ b/arch/x86/kernel/fpu/xstate.h @@ -15,8 +15,20 @@ static inline void xstate_init_xcomp_bv(struct xregs_state *xsave, u64 mask) xsave->header.xcomp_bv = mask | XCOMP_BV_COMPACTED_FORMAT; } +enum xstate_copy_mode { + XSTATE_COPY_FP, + XSTATE_COPY_FX, + XSTATE_COPY_XSAVE, +}; + +struct membuf; extern void __copy_xstate_to_uabi_buf(struct membuf to, struct fpstate *fpstate, u32 pkru_val, enum xstate_copy_mode copy_mode); +extern void copy_xstate_to_uabi_buf(struct membuf to, struct task_struct *tsk, + enum xstate_copy_mode mode); +extern int copy_uabi_from_kernel_to_xstate(struct fpstate *fpstate, const void *kbuf); +extern int copy_sigframe_from_user_to_xstate(struct fpstate *fpstate, const void __user *ubuf); + extern void fpu__init_cpu_xstate(void); extern void fpu__init_system_xstate(void); |