diff options
| author |   Thomas Gleixner <tglx@linutronix.de> | 2021-10-15 03:16:12 +0200 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2021-10-20 15:27:27 +0200 |
| commit | a0ff0611c2fbde94f6c9db8351939b08f2cb6797 (patch) | |
| tree | 19c4128a92592a76fd7378ee3ef4994af866a25f /arch/x86/include/asm/fpu/internal.h | |
| parent | x86/fpu/xstate: Mark all init only functions __init (diff) | |
| download | linux-dev-a0ff0611c2fbde94f6c9db8351939b08f2cb6797.tar.xz linux-dev-a0ff0611c2fbde94f6c9db8351939b08f2cb6797.zip | |
x86/fpu: Move KVMs FPU swapping to FPU core
Swapping the host/guest FPU is directly fiddling with FPU internals which
requires 5 exports. The upcoming support of dynamically enabled states
would even need more.
Implement a swap function in the FPU core code and export that instead.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org
Link: https://lkml.kernel.org/r/20211015011539.076072399@linutronix.de
Diffstat (limited to 'arch/x86/include/asm/fpu/internal.h')
| -rw-r--r-- | arch/x86/include/asm/fpu/internal.h | 15 |
1 files changed, 2 insertions, 13 deletions
diff --git a/arch/x86/include/asm/fpu/internal.h b/arch/x86/include/asm/fpu/internal.h index df57f1af3a4c..3ac55ba55782 100644 --- a/arch/x86/include/asm/fpu/internal.h +++ b/arch/x86/include/asm/fpu/internal.h @@ -74,14 +74,8 @@ static __always_inline __pure bool use_fxsr(void) return static_cpu_has(X86_FEATURE_FXSR); } -/* - * fpstate handling functions: - */ - extern union fpregs_state init_fpstate; - extern void fpstate_init_user(union fpregs_state *state); -extern void fpu_init_fpstate_user(struct fpu *fpu); #ifdef CONFIG_MATH_EMULATION extern void fpstate_init_soft(struct swregs_state *soft); @@ -381,12 +375,7 @@ static inline int os_xrstor_safe(struct xregs_state *xstate, u64 mask) return err; } -extern void __restore_fpregs_from_fpstate(union fpregs_state *fpstate, u64 mask); - -static inline void restore_fpregs_from_fpstate(union fpregs_state *fpstate) -{ - __restore_fpregs_from_fpstate(fpstate, xfeatures_mask_fpstate()); -} +extern void restore_fpregs_from_fpstate(union fpregs_state *fpstate, u64 mask); extern bool copy_fpstate_to_sigframe(void __user *buf, void __user *fp, int size); @@ -467,7 +456,7 @@ static inline void fpregs_restore_userregs(void) */ mask = xfeatures_mask_restore_user() | xfeatures_mask_supervisor(); - __restore_fpregs_from_fpstate(&fpu->state, mask); + restore_fpregs_from_fpstate(&fpu->state, mask); fpregs_activate(fpu); fpu->last_cpu = cpu; |