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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef ARCH_S390_ENTRY_COMMON_H #define ARCH_S390_ENTRY_COMMON_H
#include <linux/sched.h> #include <linux/audit.h> #include <linux/randomize_kstack.h> #include <linux/tracehook.h> #include <linux/processor.h> #include <linux/uaccess.h> #include <asm/timex.h> #include <asm/fpu/api.h>
#define ARCH_EXIT_TO_USER_MODE_WORK (_TIF_GUARDED_STORAGE | _TIF_PER_TRAP)
void do_per_trap(struct pt_regs *regs); void do_syscall(struct pt_regs *regs);
#ifdef CONFIG_DEBUG_ENTRY static __always_inline void arch_check_user_regs(struct pt_regs *regs) { debug_user_asce(0); }
#define arch_check_user_regs arch_check_user_regs #endif /* CONFIG_DEBUG_ENTRY */
static __always_inline void arch_exit_to_user_mode_work(struct pt_regs *regs, unsigned long ti_work) { if (ti_work & _TIF_PER_TRAP) { clear_thread_flag(TIF_PER_TRAP); do_per_trap(regs); }
if (ti_work & _TIF_GUARDED_STORAGE) gs_load_bc_cb(regs); }
#define arch_exit_to_user_mode_work arch_exit_to_user_mode_work
static __always_inline void arch_exit_to_user_mode(void) { if (test_cpu_flag(CIF_FPU)) __load_fpu_regs();
if (IS_ENABLED(CONFIG_DEBUG_ENTRY)) debug_user_asce(1); }
#define arch_exit_to_user_mode arch_exit_to_user_mode
static inline void arch_exit_to_user_mode_prepare(struct pt_regs *regs, unsigned long ti_work) { choose_random_kstack_offset(get_tod_clock_fast() & 0xff); }
#define arch_exit_to_user_mode_prepare arch_exit_to_user_mode_prepare
static inline bool on_thread_stack(void) { return !(((unsigned long)(current->stack) ^ current_stack_pointer()) & ~(THREAD_SIZE - 1)); }
#endif
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