1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef ARCH_S390_ENTRY_COMMON_H
3 #define ARCH_S390_ENTRY_COMMON_H
5 #include <linux/sched.h>
6 #include <linux/audit.h>
7 #include <linux/randomize_kstack.h>
8 #include <linux/processor.h>
9 #include <linux/uaccess.h>
10 #include <asm/timex.h>
11 #include <asm/fpu/api.h>
13 #define ARCH_EXIT_TO_USER_MODE_WORK (_TIF_GUARDED_STORAGE | _TIF_PER_TRAP)
15 void do_per_trap(struct pt_regs *regs);
17 #ifdef CONFIG_DEBUG_ENTRY
18 static __always_inline void arch_check_user_regs(struct pt_regs *regs)
23 #define arch_check_user_regs arch_check_user_regs
24 #endif /* CONFIG_DEBUG_ENTRY */
26 static __always_inline void arch_exit_to_user_mode_work(struct pt_regs *regs,
27 unsigned long ti_work)
29 if (ti_work & _TIF_PER_TRAP) {
30 clear_thread_flag(TIF_PER_TRAP);
34 if (ti_work & _TIF_GUARDED_STORAGE)
38 #define arch_exit_to_user_mode_work arch_exit_to_user_mode_work
40 static __always_inline void arch_exit_to_user_mode(void)
42 if (test_cpu_flag(CIF_FPU))
45 if (IS_ENABLED(CONFIG_DEBUG_ENTRY))
49 #define arch_exit_to_user_mode arch_exit_to_user_mode
51 static inline void arch_exit_to_user_mode_prepare(struct pt_regs *regs,
52 unsigned long ti_work)
54 choose_random_kstack_offset(get_tod_clock_fast() & 0xff);
57 #define arch_exit_to_user_mode_prepare arch_exit_to_user_mode_prepare
59 static inline bool on_thread_stack(void)
61 return !(((unsigned long)(current->stack) ^ current_stack_pointer()) & ~(THREAD_SIZE - 1));