[tip: x86/fpu] x86/fpu: Remove old KVM FPU interface
From: tip-bot2 for Thomas Gleixner
Date: Mon Oct 25 2021 - 04:37:12 EST
The following commit has been merged into the x86/fpu branch of tip:
Commit-ID: c341f1fe1543dfaf94916cef298aa60be545235f
Gitweb: https://git.kernel.org/tip/c341f1fe1543dfaf94916cef298aa60be545235f
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Fri, 22 Oct 2021 20:55:54 +02:00
Committer: Borislav Petkov <bp@xxxxxxx>
CommitterDate: Mon, 25 Oct 2021 10:24:16 +02:00
x86/fpu: Remove old KVM FPU interface
No more users.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Link: https://lkml.kernel.org/r/20211022185313.074853631@xxxxxxxxxxxxx
---
arch/x86/include/asm/fpu/api.h | 2 --
arch/x86/kernel/fpu/core.c | 32 --------------------------------
2 files changed, 34 deletions(-)
diff --git a/arch/x86/include/asm/fpu/api.h b/arch/x86/include/asm/fpu/api.h
index 5e5f172..e9379d7 100644
--- a/arch/x86/include/asm/fpu/api.h
+++ b/arch/x86/include/asm/fpu/api.h
@@ -131,14 +131,12 @@ static inline void fpstate_init_soft(struct swregs_state *soft) {}
DECLARE_PER_CPU(struct fpu *, fpu_fpregs_owner_ctx);
/* fpstate-related functions which are exported to KVM */
-extern void fpu_init_fpstate_user(struct fpu *fpu);
extern void fpstate_clear_xstate_component(struct fpstate *fps, unsigned int xfeature);
/* KVM specific functions */
extern bool fpu_alloc_guest_fpstate(struct fpu_guest *gfpu);
extern void fpu_free_guest_fpstate(struct fpu_guest *gfpu);
extern int fpu_swap_kvm_fpstate(struct fpu_guest *gfpu, bool enter_guest);
-extern void fpu_swap_kvm_fpu(struct fpu *save, struct fpu *rstor, u64 restore_mask);
extern void fpu_copy_guest_fpstate_to_uabi(struct fpu_guest *gfpu, void *buf, unsigned int size, u32 pkru);
extern int fpu_copy_uabi_to_guest_fpstate(struct fpu_guest *gfpu, const void *buf, u64 xcr0, u32 *vpkru);
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index 64c98a4..c55013f 100644
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -246,29 +246,6 @@ int fpu_swap_kvm_fpstate(struct fpu_guest *guest_fpu, bool enter_guest)
}
EXPORT_SYMBOL_GPL(fpu_swap_kvm_fpstate);
-void fpu_swap_kvm_fpu(struct fpu *save, struct fpu *rstor, u64 restore_mask)
-{
- fpregs_lock();
-
- if (save) {
- struct fpstate *fpcur = current->thread.fpu.fpstate;
-
- if (test_thread_flag(TIF_NEED_FPU_LOAD))
- memcpy(&save->fpstate->regs, &fpcur->regs, fpcur->size);
- else
- save_fpregs_to_fpstate(save);
- }
-
- if (rstor) {
- restore_mask &= XFEATURE_MASK_FPSTATE;
- restore_fpregs_from_fpstate(rstor->fpstate, restore_mask);
- }
-
- fpregs_mark_activate();
- fpregs_unlock();
-}
-EXPORT_SYMBOL_GPL(fpu_swap_kvm_fpu);
-
void fpu_copy_guest_fpstate_to_uabi(struct fpu_guest *gfpu, void *buf,
unsigned int size, u32 pkru)
{
@@ -438,15 +415,6 @@ void fpstate_reset(struct fpu *fpu)
__fpstate_reset(fpu->fpstate);
}
-#if IS_ENABLED(CONFIG_KVM)
-void fpu_init_fpstate_user(struct fpu *fpu)
-{
- fpstate_reset(fpu);
- fpstate_init_user(fpu->fpstate);
-}
-EXPORT_SYMBOL_GPL(fpu_init_fpstate_user);
-#endif
-
/* Clone current's FPU state on fork */
int fpu_clone(struct task_struct *dst)
{