| /* SPDX-License-Identifier: GPL-2.0 */ |
| |
| #ifndef _ASM_S390_ASCE_H |
| #define _ASM_S390_ASCE_H |
| |
| #include <linux/thread_info.h> |
| #include <linux/irqflags.h> |
| #include <asm/lowcore.h> |
| #include <asm/ctlreg.h> |
| |
| static inline bool enable_sacf_uaccess(void) |
| { |
| unsigned long flags; |
| |
| if (test_thread_flag(TIF_ASCE_PRIMARY)) |
| return true; |
| local_irq_save(flags); |
| local_ctl_load(1, &get_lowcore()->kernel_asce); |
| set_thread_flag(TIF_ASCE_PRIMARY); |
| local_irq_restore(flags); |
| return false; |
| } |
| |
| static inline void disable_sacf_uaccess(bool previous) |
| { |
| unsigned long flags; |
| |
| if (previous) |
| return; |
| local_irq_save(flags); |
| local_ctl_load(1, &get_lowcore()->user_asce); |
| clear_thread_flag(TIF_ASCE_PRIMARY); |
| local_irq_restore(flags); |
| } |
| |
| #endif /* _ASM_S390_ASCE_H */ |
