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x86/fpu: Rename restore_fpu_checking() to copy_fpstate_to_fpregs() 

fpu_restore_checking() is a helper function of restore_fpu_checking(),
but this is not apparent from the naming.

Both copy fpstate contents to fpregs, while the fuller variant does
a full copy without leaking information.

So rename them to:

    copy_fpstate_to_fpregs()
  __copy_fpstate_to_fpregs()

Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-04-29 20:10:43 +02:00
parent 5033861575
commit 0e75c54f17
3 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/x86/include/asm/fpu/internal.h
View File

@ -289,7 +289,7 @@ static inline int copy_fpregs_to_fpstate(struct fpu *fpu)
extern void fpu__save(struct fpu *fpu);
static inline int fpu_restore_checking(struct fpu *fpu)
static inline int __copy_fpstate_to_fpregs(struct fpu *fpu)
{
if (use_xsave())
return fpu_xrstor_checking(&fpu->state.xsave);
@ -299,7 +299,7 @@ static inline int fpu_restore_checking(struct fpu *fpu)
return frstor_checking(&fpu->state.fsave);
}
static inline int restore_fpu_checking(struct fpu *fpu)
static inline int copy_fpstate_to_fpregs(struct fpu *fpu)
{
/*
* AMD K7/K8 CPUs don't save/restore FDP/FIP/FOP unless an exception is
@ -314,7 +314,7 @@ static inline int restore_fpu_checking(struct fpu *fpu)
: : [addr] "m" (fpu->fpregs_active));
}
return fpu_restore_checking(fpu);
return __copy_fpstate_to_fpregs(fpu);
}
/*
@ -520,7 +520,7 @@ switch_fpu_prepare(struct fpu *old_fpu, struct fpu *new_fpu, int cpu)
static inline void switch_fpu_finish(struct fpu *new_fpu, fpu_switch_t fpu_switch)
{
if (fpu_switch.preload) {
if (unlikely(restore_fpu_checking(new_fpu)))
if (unlikely(copy_fpstate_to_fpregs(new_fpu)))
fpu__reset(new_fpu);
}
}

4
arch/x86/kernel/fpu/core.c
View File

@ -115,7 +115,7 @@ void __kernel_fpu_end(void)
struct fpu *fpu = &current->thread.fpu;
if (fpu->fpregs_active) {
if (WARN_ON(restore_fpu_checking(fpu)))
if (WARN_ON(copy_fpstate_to_fpregs(fpu)))
fpu__reset(fpu);
} else {
__fpregs_deactivate_hw();
@ -338,7 +338,7 @@ void fpu__restore(void)
/* Avoid __kernel_fpu_begin() right after fpregs_activate() */
kernel_fpu_disable();
fpregs_activate(fpu);
if (unlikely(restore_fpu_checking(fpu))) {
if (unlikely(copy_fpstate_to_fpregs(fpu))) {
fpu__reset(fpu);
force_sig_info(SIGSEGV, SEND_SIG_PRIV, tsk);
} else {

2
arch/x86/kvm/x86.c
View File

@ -7030,7 +7030,7 @@ void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
kvm_put_guest_xcr0(vcpu);
vcpu->guest_fpu_loaded = 1;
__kernel_fpu_begin();
fpu_restore_checking(&vcpu->arch.guest_fpu);
__copy_fpstate_to_fpregs(&vcpu->arch.guest_fpu);
trace_kvm_fpu(1);
}