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