lkml.org 
[lkml]   [2021]   [Jun]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[patch V3 35/66] x86/fpu: Rename copy_kernel_to_fpregs() to restore_fpregs_from_kernel()
This is not a copy functionality. It restores the register state from the
supplied kernel buffer.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/include/asm/fpu/internal.h | 8 ++++----
arch/x86/kvm/x86.c | 4 ++--
arch/x86/mm/extable.c | 2 +-
3 files changed, 7 insertions(+), 7 deletions(-)

--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -377,7 +377,7 @@ static inline int os_xrstor_safe(struct

extern void save_fpregs_to_fpstate(struct fpu *fpu);

-static inline void __copy_kernel_to_fpregs(union fpregs_state *fpstate, u64 mask)
+static inline void __restore_fpregs_from_fpstate(union fpregs_state *fpstate, u64 mask)
{
if (use_xsave()) {
os_xrstor(&fpstate->xsave, mask);
@@ -389,7 +389,7 @@ static inline void __copy_kernel_to_fpre
}
}

-static inline void copy_kernel_to_fpregs(union fpregs_state *fpstate)
+static inline void restore_fpregs_from_fpstate(union fpregs_state *fpstate)
{
/*
* AMD K7/K8 CPUs don't save/restore FDP/FIP/FOP unless an exception is
@@ -404,7 +404,7 @@ static inline void copy_kernel_to_fpregs
: : [addr] "m" (fpstate));
}

- __copy_kernel_to_fpregs(fpstate, -1);
+ __restore_fpregs_from_fpstate(fpstate, -1);
}

extern int copy_fpstate_to_sigframe(void __user *buf, void __user *fp, int size);
@@ -475,7 +475,7 @@ static inline void __fpregs_load_activat
return;

if (!fpregs_state_valid(fpu, cpu)) {
- copy_kernel_to_fpregs(&fpu->state);
+ restore_fpregs_from_fpstate(&fpu->state);
fpregs_activate(fpu);
fpu->last_cpu = cpu;
}
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9634,7 +9634,7 @@ static void kvm_load_guest_fpu(struct kv
*/
if (vcpu->arch.guest_fpu)
/* PKRU is separately restored in kvm_x86_ops.run. */
- __copy_kernel_to_fpregs(&vcpu->arch.guest_fpu->state,
+ __restore_fpregs_from_fpstate(&vcpu->arch.guest_fpu->state,
~XFEATURE_MASK_PKRU);

fpregs_mark_activate();
@@ -9655,7 +9655,7 @@ static void kvm_put_guest_fpu(struct kvm
if (vcpu->arch.guest_fpu)
kvm_save_current_fpu(vcpu->arch.guest_fpu);

- copy_kernel_to_fpregs(&vcpu->arch.user_fpu->state);
+ restore_fpregs_from_fpstate(&vcpu->arch.user_fpu->state);

fpregs_mark_activate();
fpregs_unlock();
--- a/arch/x86/mm/extable.c
+++ b/arch/x86/mm/extable.c
@@ -65,7 +65,7 @@ EXPORT_SYMBOL_GPL(ex_handler_fault);
WARN_ONCE(1, "Bad FPU state detected at %pB, reinitializing FPU registers.",
(void *)instruction_pointer(regs));

- __copy_kernel_to_fpregs(&init_fpstate, -1);
+ __restore_fpregs_from_fpstate(&init_fpstate, -1);
return true;
}
EXPORT_SYMBOL_GPL(ex_handler_fprestore);
\
 
 \ /
  Last update: 2021-06-18 17:22    [W:0.582 / U:0.792 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site