Contributors: 10
Author Tokens Token Proportion Commits Commit Proportion
Anton Blanchard 158 31.54% 6 30.00%
David Howells 112 22.36% 1 5.00%
Michael Ellerman 90 17.96% 2 10.00%
Cyril Bur 50 9.98% 3 15.00%
Nicholas Piggin 39 7.78% 2 10.00%
Kevin Hao 33 6.59% 2 10.00%
Sukadev Bhattiprolu 10 2.00% 1 5.00%
Bharat Bhushan 5 1.00% 1 5.00%
Leonidas Da Silva Barbosa 3 0.60% 1 5.00%
Greg Kroah-Hartman 1 0.20% 1 5.00%
Total 501 20 


/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
 */
#ifndef _ASM_POWERPC_SWITCH_TO_H
#define _ASM_POWERPC_SWITCH_TO_H

#include <linux/sched.h>
#include <asm/reg.h>

struct thread_struct;
struct task_struct;
struct pt_regs;

extern struct task_struct *__switch_to(struct task_struct *,
	struct task_struct *);
#define switch_to(prev, next, last)	((last) = __switch_to((prev), (next)))

extern struct task_struct *_switch(struct thread_struct *prev,
				   struct thread_struct *next);

extern void switch_booke_debug_regs(struct debug_reg *new_debug);

extern int emulate_altivec(struct pt_regs *);

#ifdef CONFIG_PPC_BOOK3S_64
void restore_math(struct pt_regs *regs);
#else
static inline void restore_math(struct pt_regs *regs)
{
}
#endif

void restore_tm_state(struct pt_regs *regs);

extern void flush_all_to_thread(struct task_struct *);
extern void giveup_all(struct task_struct *);

#ifdef CONFIG_PPC_FPU
extern void enable_kernel_fp(void);
extern void flush_fp_to_thread(struct task_struct *);
extern void giveup_fpu(struct task_struct *);
extern void save_fpu(struct task_struct *);
static inline void disable_kernel_fp(void)
{
	msr_check_and_clear(MSR_FP);
}
#else
static inline void save_fpu(struct task_struct *t) { }
static inline void flush_fp_to_thread(struct task_struct *t) { }
#endif

#ifdef CONFIG_ALTIVEC
extern void enable_kernel_altivec(void);
extern void flush_altivec_to_thread(struct task_struct *);
extern void giveup_altivec(struct task_struct *);
extern void save_altivec(struct task_struct *);
static inline void disable_kernel_altivec(void)
{
	msr_check_and_clear(MSR_VEC);
}
#else
static inline void save_altivec(struct task_struct *t) { }
static inline void __giveup_altivec(struct task_struct *t) { }
#endif

#ifdef CONFIG_VSX
extern void enable_kernel_vsx(void);
extern void flush_vsx_to_thread(struct task_struct *);
static inline void disable_kernel_vsx(void)
{
	msr_check_and_clear(MSR_FP|MSR_VEC|MSR_VSX);
}
#endif

#ifdef CONFIG_SPE
extern void enable_kernel_spe(void);
extern void flush_spe_to_thread(struct task_struct *);
extern void giveup_spe(struct task_struct *);
extern void __giveup_spe(struct task_struct *);
static inline void disable_kernel_spe(void)
{
	msr_check_and_clear(MSR_SPE);
}
#else
static inline void __giveup_spe(struct task_struct *t) { }
#endif

static inline void clear_task_ebb(struct task_struct *t)
{
#ifdef CONFIG_PPC_BOOK3S_64
    /* EBB perf events are not inherited, so clear all EBB state. */
    t->thread.ebbrr = 0;
    t->thread.ebbhr = 0;
    t->thread.bescr = 0;
    t->thread.mmcr2 = 0;
    t->thread.mmcr0 = 0;
    t->thread.siar = 0;
    t->thread.sdar = 0;
    t->thread.sier = 0;
    t->thread.used_ebb = 0;
#endif
}

extern int set_thread_tidr(struct task_struct *t);

#endif /* _ASM_POWERPC_SWITCH_TO_H */