Contributors: 8
Author Tokens Token Proportion Commits Commit Proportion
Sven Schnelle 133 61.01% 3 16.67%
Mark Rutland 30 13.76% 1 5.56%
Heiko Carstens 18 8.26% 4 22.22%
Thomas Richter 14 6.42% 1 5.56%
Martin Schwidefsky 8 3.67% 3 16.67%
Linus Torvalds (pre-git) 7 3.21% 4 22.22%
Gerald Schaefer 7 3.21% 1 5.56%
Greg Kroah-Hartman 1 0.46% 1 5.56%
Total 218 18 


/* 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

static __always_inline bool arch_in_rcu_eqs(void)
{
	if (IS_ENABLED(CONFIG_KVM))
		return current->flags & PF_VCPU;

	return false;
}

#define arch_in_rcu_eqs arch_in_rcu_eqs

#endif