powerpc/kernel/process.c

85 static void check_if_tm_restore_required(struct task_struct *tsk)
93 	if (tsk == current && tsk->thread.regs &&
94 	    MSR_TM_ACTIVE(tsk->thread.regs->msr) &&
96 		regs_set_return_msr(&tsk->thread.ckpt_regs,
97 						tsk->thread.regs->msr);
103 static inline void check_if_tm_restore_required(struct task_struct *tsk) { }
153 static void __giveup_fpu(struct task_struct *tsk)
157 	save_fpu(tsk);
158 	msr = tsk->thread.regs->msr;
162 	regs_set_return_msr(tsk->thread.regs, msr);
165 void giveup_fpu(struct task_struct *tsk)
167 	check_if_tm_restore_required(tsk);
170 	__giveup_fpu(tsk);
177  * the thread_struct is up to date for task tsk.
179 void flush_fp_to_thread(struct task_struct *tsk)
181 	if (tsk->thread.regs) {
191 		if (tsk->thread.regs->msr & MSR_FP) {
199 			BUG_ON(tsk != current);
200 			giveup_fpu(tsk);
232 static inline void __giveup_fpu(struct task_struct *tsk) { }
236 static void __giveup_altivec(struct task_struct *tsk)
240 	save_altivec(tsk);
241 	msr = tsk->thread.regs->msr;
245 	regs_set_return_msr(tsk->thread.regs, msr);
248 void giveup_altivec(struct task_struct *tsk)
250 	check_if_tm_restore_required(tsk);
253 	__giveup_altivec(tsk);
285  * the thread_struct is up to date for task tsk.
287 void flush_altivec_to_thread(struct task_struct *tsk)
289 	if (tsk->thread.regs) {
291 		if (tsk->thread.regs->msr & MSR_VEC) {
292 			BUG_ON(tsk != current);
293 			giveup_altivec(tsk);
302 static void __giveup_vsx(struct task_struct *tsk)
304 	unsigned long msr = tsk->thread.regs->msr;
314 		__giveup_fpu(tsk);
316 		__giveup_altivec(tsk);
319 static void giveup_vsx(struct task_struct *tsk)
321 	check_if_tm_restore_required(tsk);
324 	__giveup_vsx(tsk);
354 void flush_vsx_to_thread(struct task_struct *tsk)
356 	if (tsk->thread.regs) {
358 		if (tsk->thread.regs->msr & (MSR_VSX|MSR_VEC|MSR_FP)) {
359 			BUG_ON(tsk != current);
360 			giveup_vsx(tsk);
369 void giveup_spe(struct task_struct *tsk)
371 	check_if_tm_restore_required(tsk);
374 	__giveup_spe(tsk);
392 void flush_spe_to_thread(struct task_struct *tsk)
394 	if (tsk->thread.regs) {
396 		if (tsk->thread.regs->msr & MSR_SPE) {
397 			BUG_ON(tsk != current);
398 			tsk->thread.spefscr = mfspr(SPRN_SPEFSCR);
399 			giveup_spe(tsk);
423 void giveup_all(struct task_struct *tsk)
427 	if (!tsk->thread.regs)
430 	check_if_tm_restore_required(tsk);
432 	usermsr = tsk->thread.regs->msr;
442 		__giveup_fpu(tsk);
444 		__giveup_altivec(tsk);
446 		__giveup_spe(tsk);
565 static void save_all(struct task_struct *tsk)
569 	if (!tsk->thread.regs)
572 	usermsr = tsk->thread.regs->msr;
582 		save_fpu(tsk);
585 		save_altivec(tsk);
588 		__giveup_spe(tsk);
593 void flush_all_to_thread(struct task_struct *tsk)
595 	if (tsk->thread.regs) {
597 		BUG_ON(tsk != current);
599 		if (tsk->thread.regs->msr & MSR_SPE)
600 			tsk->thread.spefscr = mfspr(SPRN_SPEFSCR);
602 		save_all(tsk);
928 static inline bool tm_enabled(struct task_struct *tsk)
930 	return tsk && tsk->thread.regs && (tsk->thread.regs->msr & MSR_TM);
983 static inline void tm_reclaim_task(struct task_struct *tsk)
995 	struct thread_struct *thr = &tsk->thread;
1007 		 tsk->pid, thr->regs->nip,
1014 		 tsk->pid);
2010 int set_fpexc_mode(struct task_struct *tsk, unsigned int val)
2012 	struct pt_regs *regs = tsk->thread.regs;
2033 			tsk->thread.spefscr_last = mfspr(SPRN_SPEFSCR);
2034 			tsk->thread.fpexc_mode = val &
2050 	tsk->thread.fpexc_mode = __pack_fe01(val);
2053 						| tsk->thread.fpexc_mode);
2058 int get_fpexc_mode(struct task_struct *tsk, unsigned long adr)
2062 	if (tsk->thread.fpexc_mode & PR_FP_EXC_SW_ENABLE) {
2077 			tsk->thread.spefscr_last = mfspr(SPRN_SPEFSCR);
2078 			val = tsk->thread.fpexc_mode;
2083 		val = __unpack_fe01(tsk->thread.fpexc_mode);
2088 int set_endian(struct task_struct *tsk, unsigned int val)
2090 	struct pt_regs *regs = tsk->thread.regs;
2109 int get_endian(struct task_struct *tsk, unsigned long adr)
2111 	struct pt_regs *regs = tsk->thread.regs;
2132 int set_unalign_ctl(struct task_struct *tsk, unsigned int val)
2134 	tsk->thread.align_ctl = val;
2138 int get_unalign_ctl(struct task_struct *tsk, unsigned long adr)
2140 	return put_user(tsk->thread.align_ctl, (unsigned int __user *)adr);
2261 static bool empty_user_regs(struct pt_regs *regs, struct task_struct *tsk)
2270 	stack_page = (unsigned long)task_stack_page(tsk);
2279 void __no_sanitize_address show_stack(struct task_struct *tsk,
2289 	if (tsk == NULL)
2290 		tsk = current;
2292 	if (!try_get_task_stack(tsk))
2297 		if (tsk == current)
2300 			sp = tsk->thread.ksp;
2306 		if (!validate_sp(sp, tsk))
2333 		if (validate_sp_size(sp, tsk, STACK_SWITCH_FRAME_SIZE)
2344 			if (!empty_user_regs(regs, tsk)) {
2355 	put_task_stack(tsk);