/*
* this gets called so that we can store lazy state into memory and copy the
* current task into the new thread.
*/
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
int ret;
*dst = *src;
if (fpu_allocated(&src->thread.fpu)) {
memset(&dst->thread.fpu, 0, sizeof(dst->thread.fpu));
ret = fpu_alloc(&dst->thread.fpu);
if (ret)
return ret;
fpu_copy(dst, src);
}
return 0;
}
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
int ret;
*dst = *src;
if (fpu_allocated((struct fpu *)&src->thread.xstate)) {
memset(&dst->thread.xstate, 0, sizeof(dst->thread.xstate));
ret = fpu_alloc((struct fpu *)&dst->thread.xstate);
if (ret)
return ret;
fpu_copy((struct fpu *)&dst->thread.xstate, (struct fpu *)&src->thread.xstate);
}
return 0;
}
/*
* this gets called so that we can store lazy state into memory and copy the
* current task into the new thread.
*/
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
*dst = *src;
dst->thread.fpu_counter = 0;
dst->thread.fpu.has_fpu = 0;
dst->thread.fpu.state = NULL;
task_disable_lazy_fpu_restore(dst);
if (tsk_used_math(src)) {
int err = fpu_alloc(&dst->thread.fpu);
if (err)
return err;
fpu_copy(dst, src);
}
return 0;
}
/*
* this gets called so that we can store lazy state into memory and copy the
* current task into the new thread.
*/
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
*dst = *src;
dst->thread.fpu_counter = 0;
dst->thread.fpu.has_fpu = 0;
dst->thread.fpu.last_cpu = ~0;
dst->thread.fpu.state = NULL;
if (tsk_used_math(src)) {
int err = fpu_alloc(&dst->thread.fpu);
if (err)
return err;
fpu_copy(dst, src);
}
return 0;
}
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
int ret;
*dst = *src;
if (fpu_allocated(&src->thread.fpu)) {
memset(&dst->thread.fpu, 0, sizeof(dst->thread.fpu));
ret = fpu_alloc(&dst->thread.fpu);
if (ret)
return ret;
fpu_copy(&dst->thread.fpu, &src->thread.fpu);
}
#ifdef CONFIG_X86_EARLYMIC
if (dst->thread.fpu.state) {
/*
* No need to set this flag ? it should be inherited from the
* parent thread since the threadinfo is copied from the
* parent in setup_thread_stack()
*/
set_stopped_child_used_math(dst);
/*
* Simulate FPU DNA
* Undo the effects of unlazy_fpu in prepare_to_copy()
*/
preempt_disable();
clts();
#ifdef CONFIG_ML1OM
__math_state_restore();
#else
restore_mask_regs();
stts();
#endif
preempt_enable();
}
#endif
return 0;
}