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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/powerpc/include/asm/switch_to.h | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/powerpc/include/asm/switch_to.h')
-rw-r--r-- | arch/powerpc/include/asm/switch_to.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h new file mode 100644 index 0000000000..aee25e3ebf --- /dev/null +++ b/arch/powerpc/include/asm/switch_to.h @@ -0,0 +1,129 @@ +/* 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) { } +static inline void enable_kernel_altivec(void) +{ + BUILD_BUG(); +} + +static inline void disable_kernel_altivec(void) +{ + BUILD_BUG(); +} +#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); +} +#else +static inline void enable_kernel_vsx(void) +{ + BUILD_BUG(); +} + +static inline void disable_kernel_vsx(void) +{ + BUILD_BUG(); +} +#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 +} + +void kvmppc_save_user_regs(void); +void kvmppc_save_current_sprs(void); + +extern int set_thread_tidr(struct task_struct *t); + +#endif /* _ASM_POWERPC_SWITCH_TO_H */ |