Cregit: Linux 6.17: asce.h

Contributors: 8
Author	Tokens	Token Proportion	Commits	Commit Proportion
Heiko Carstens	63	52.94%	3	25.00%
Alexander Gordeev	37	31.09%	1	8.33%
Sven Schnelle	6	5.04%	1	8.33%
Martin Schwidefsky	6	5.04%	3	25.00%
Christian Bornträger	3	2.52%	1	8.33%
Jakub Jelínek	2	1.68%	1	8.33%
Christian Ehrhardt	1	0.84%	1	8.33%
Greg Kroah-Hartman	1	0.84%	1	8.33%
Total	119		12

/* 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 */