1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef ARCH_S390_ENTRY_COMMON_H 3 #define ARCH_S390_ENTRY_COMMON_H 4 5 #include <linux/sched.h> 6 #include <linux/audit.h> 7 #include <linux/tracehook.h> 8 #include <linux/processor.h> 9 #include <linux/uaccess.h> 10 #include <asm/fpu/api.h> 11 12 #define ARCH_EXIT_TO_USER_MODE_WORK (_TIF_GUARDED_STORAGE | _TIF_PER_TRAP) 13 14 void do_per_trap(struct pt_regs *regs); 15 void do_syscall(struct pt_regs *regs); 16 17 typedef void (*pgm_check_func)(struct pt_regs *regs); 18 19 extern pgm_check_func pgm_check_table[128]; 20 21 #ifdef CONFIG_DEBUG_ENTRY 22 static __always_inline void arch_check_user_regs(struct pt_regs *regs) 23 { 24 debug_user_asce(0); 25 } 26 27 #define arch_check_user_regs arch_check_user_regs 28 #endif /* CONFIG_DEBUG_ENTRY */ 29 30 static __always_inline void arch_exit_to_user_mode_work(struct pt_regs *regs, 31 unsigned long ti_work) 32 { 33 if (ti_work & _TIF_PER_TRAP) { 34 clear_thread_flag(TIF_PER_TRAP); 35 do_per_trap(regs); 36 } 37 38 if (ti_work & _TIF_GUARDED_STORAGE) 39 gs_load_bc_cb(regs); 40 } 41 42 #define arch_exit_to_user_mode_work arch_exit_to_user_mode_work 43 44 static __always_inline void arch_exit_to_user_mode(void) 45 { 46 if (test_cpu_flag(CIF_FPU)) 47 __load_fpu_regs(); 48 49 if (IS_ENABLED(CONFIG_DEBUG_ENTRY)) 50 debug_user_asce(1); 51 } 52 53 #define arch_exit_to_user_mode arch_exit_to_user_mode 54 55 static inline bool on_thread_stack(void) 56 { 57 return !(((unsigned long)(current->stack) ^ current_stack_pointer()) & ~(THREAD_SIZE - 1)); 58 } 59 60 #endif 61