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Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef _ASM_S390_ASCE_H
4#define _ASM_S390_ASCE_H
5
6#include <linux/thread_info.h>
7#include <linux/irqflags.h>
8#include <asm/lowcore.h>
9#include <asm/ctlreg.h>
10
11static inline bool enable_sacf_uaccess(void)
12{
13 unsigned long flags;
14
15 if (test_thread_flag(TIF_ASCE_PRIMARY))
16 return true;
17 local_irq_save(flags);
18 local_ctl_load(1, &get_lowcore()->kernel_asce);
19 set_thread_flag(TIF_ASCE_PRIMARY);
20 local_irq_restore(flags);
21 return false;
22}
23
24static inline void disable_sacf_uaccess(bool previous)
25{
26 unsigned long flags;
27
28 if (previous)
29 return;
30 local_irq_save(flags);
31 local_ctl_load(1, &get_lowcore()->user_asce);
32 clear_thread_flag(TIF_ASCE_PRIMARY);
33 local_irq_restore(flags);
34}
35
36#endif /* _ASM_S390_ASCE_H */