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Diffstat (limited to 'arch/x86/kernel/fpu/core.c')
-rw-r--r--arch/x86/kernel/fpu/core.c52
1 files changed, 20 insertions, 32 deletions
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index ca88608a62a5..1697a9a34ff0 100644
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -174,9 +174,9 @@ static void __save_fpu(struct fpu *fpu)
{
if (use_xsave()) {
if (unlikely(system_state == SYSTEM_BOOTING))
- xsave_state_booting(&fpu->state->xsave);
+ xsave_state_booting(&fpu->state.xsave);
else
- xsave_state(&fpu->state->xsave);
+ xsave_state(&fpu->state.xsave);
} else {
fpu_fxsave(fpu);
}
@@ -207,16 +207,16 @@ EXPORT_SYMBOL_GPL(fpu__save);
void fpstate_init(struct fpu *fpu)
{
if (!cpu_has_fpu) {
- finit_soft_fpu(&fpu->state->soft);
+ finit_soft_fpu(&fpu->state.soft);
return;
}
- memset(fpu->state, 0, xstate_size);
+ memset(&fpu->state, 0, xstate_size);
if (cpu_has_fxsr) {
- fx_finit(&fpu->state->fxsave);
+ fx_finit(&fpu->state.fxsave);
} else {
- struct i387_fsave_struct *fp = &fpu->state->fsave;
+ struct i387_fsave_struct *fp = &fpu->state.fsave;
fp->cwd = 0xffff037fu;
fp->swd = 0xffff0000u;
fp->twd = 0xffffffffu;
@@ -241,15 +241,8 @@ void fpstate_cache_init(void)
int fpstate_alloc(struct fpu *fpu)
{
- if (fpu->state)
- return 0;
-
- fpu->state = kmem_cache_alloc(task_xstate_cachep, GFP_KERNEL);
- if (!fpu->state)
- return -ENOMEM;
-
/* The CPU requires the FPU state to be aligned to 16 byte boundaries: */
- WARN_ON((unsigned long)fpu->state & 15);
+ WARN_ON((unsigned long)&fpu->state & 15);
return 0;
}
@@ -257,10 +250,6 @@ EXPORT_SYMBOL_GPL(fpstate_alloc);
void fpstate_free(struct fpu *fpu)
{
- if (fpu->state) {
- kmem_cache_free(task_xstate_cachep, fpu->state);
- fpu->state = NULL;
- }
}
EXPORT_SYMBOL_GPL(fpstate_free);
@@ -277,11 +266,11 @@ static void fpu_copy(struct fpu *dst_fpu, struct fpu *src_fpu)
WARN_ON(src_fpu != &current->thread.fpu);
if (use_eager_fpu()) {
- memset(&dst_fpu->state->xsave, 0, xstate_size);
+ memset(&dst_fpu->state.xsave, 0, xstate_size);
__save_fpu(dst_fpu);
} else {
fpu__save(src_fpu);
- memcpy(dst_fpu->state, src_fpu->state, xstate_size);
+ memcpy(&dst_fpu->state, &src_fpu->state, xstate_size);
}
}
@@ -289,7 +278,6 @@ int fpu__copy(struct fpu *dst_fpu, struct fpu *src_fpu)
{
dst_fpu->counter = 0;
dst_fpu->fpregs_active = 0;
- dst_fpu->state = NULL;
dst_fpu->last_cpu = -1;
if (src_fpu->fpstate_active) {
@@ -483,7 +471,7 @@ int xfpregs_get(struct task_struct *target, const struct user_regset *regset,
sanitize_i387_state(target);
return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &fpu->state->fxsave, 0, -1);
+ &fpu->state.fxsave, 0, -1);
}
int xfpregs_set(struct task_struct *target, const struct user_regset *regset,
@@ -503,19 +491,19 @@ int xfpregs_set(struct task_struct *target, const struct user_regset *regset,
sanitize_i387_state(target);
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &fpu->state->fxsave, 0, -1);
+ &fpu->state.fxsave, 0, -1);
/*
* mxcsr reserved bits must be masked to zero for security reasons.
*/
- fpu->state->fxsave.mxcsr &= mxcsr_feature_mask;
+ fpu->state.fxsave.mxcsr &= mxcsr_feature_mask;
/*
* update the header bits in the xsave header, indicating the
* presence of FP and SSE state.
*/
if (cpu_has_xsave)
- fpu->state->xsave.header.xfeatures |= XSTATE_FPSSE;
+ fpu->state.xsave.header.xfeatures |= XSTATE_FPSSE;
return ret;
}
@@ -535,7 +523,7 @@ int xstateregs_get(struct task_struct *target, const struct user_regset *regset,
if (ret)
return ret;
- xsave = &fpu->state->xsave;
+ xsave = &fpu->state.xsave;
/*
* Copy the 48bytes defined by the software first into the xstate
@@ -566,7 +554,7 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset,
if (ret)
return ret;
- xsave = &fpu->state->xsave;
+ xsave = &fpu->state.xsave;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, xsave, 0, -1);
/*
@@ -657,7 +645,7 @@ static inline u32 twd_fxsr_to_i387(struct i387_fxsave_struct *fxsave)
void
convert_from_fxsr(struct user_i387_ia32_struct *env, struct task_struct *tsk)
{
- struct i387_fxsave_struct *fxsave = &tsk->thread.fpu.state->fxsave;
+ struct i387_fxsave_struct *fxsave = &tsk->thread.fpu.state.fxsave;
struct _fpreg *to = (struct _fpreg *) &env->st_space[0];
struct _fpxreg *from = (struct _fpxreg *) &fxsave->st_space[0];
int i;
@@ -695,7 +683,7 @@ void convert_to_fxsr(struct task_struct *tsk,
const struct user_i387_ia32_struct *env)
{
- struct i387_fxsave_struct *fxsave = &tsk->thread.fpu.state->fxsave;
+ struct i387_fxsave_struct *fxsave = &tsk->thread.fpu.state.fxsave;
struct _fpreg *from = (struct _fpreg *) &env->st_space[0];
struct _fpxreg *to = (struct _fpxreg *) &fxsave->st_space[0];
int i;
@@ -736,7 +724,7 @@ int fpregs_get(struct task_struct *target, const struct user_regset *regset,
if (!cpu_has_fxsr)
return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &fpu->state->fsave, 0,
+ &fpu->state.fsave, 0,
-1);
sanitize_i387_state(target);
@@ -770,7 +758,7 @@ int fpregs_set(struct task_struct *target, const struct user_regset *regset,
if (!cpu_has_fxsr)
return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &fpu->state->fsave, 0,
+ &fpu->state.fsave, 0,
-1);
if (pos > 0 || count < sizeof(env))
@@ -785,7 +773,7 @@ int fpregs_set(struct task_struct *target, const struct user_regset *regset,
* presence of FP.
*/
if (cpu_has_xsave)
- fpu->state->xsave.header.xfeatures |= XSTATE_FP;
+ fpu->state.xsave.header.xfeatures |= XSTATE_FP;
return ret;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-19 19:14:58 +0000