| /* 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/processor.h> |
| #include <linux/uaccess.h> |
| #include <asm/timex.h> |
| #include <asm/fpu.h> |
| #include <asm/pai.h> |
| |
| #define ARCH_EXIT_TO_USER_MODE_WORK (_TIF_GUARDED_STORAGE | _TIF_PER_TRAP) |
| |
| void do_per_trap(struct pt_regs *regs); |
| |
| static __always_inline void arch_enter_from_user_mode(struct pt_regs *regs) |
| { |
| if (IS_ENABLED(CONFIG_DEBUG_ENTRY)) |
| debug_user_asce(0); |
| |
| pai_kernel_enter(regs); |
| } |
| |
| #define arch_enter_from_user_mode arch_enter_from_user_mode |
| |
| 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) |
| { |
| load_user_fpu_regs(); |
| |
| if (IS_ENABLED(CONFIG_DEBUG_ENTRY)) |
| debug_user_asce(1); |
| |
| pai_kernel_exit(current_pt_regs()); |
| } |
| |
| #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()); |
| } |
| |
| #define arch_exit_to_user_mode_prepare arch_exit_to_user_mode_prepare |
| |
| #endif |
