blob: baa8005090c30914dc2a3c58076bbb58395c81ad (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/* 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/tracehook.h>
#include <linux/processor.h>
#include <linux/uaccess.h>
#include <asm/timex.h>
#include <asm/fpu/api.h>
#define ARCH_EXIT_TO_USER_MODE_WORK (_TIF_GUARDED_STORAGE | _TIF_PER_TRAP)
void do_per_trap(struct pt_regs *regs);
void do_syscall(struct pt_regs *regs);
#ifdef CONFIG_DEBUG_ENTRY
static __always_inline void arch_check_user_regs(struct pt_regs *regs)
{
debug_user_asce(0);
}
#define arch_check_user_regs arch_check_user_regs
#endif /* CONFIG_DEBUG_ENTRY */
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)
{
if (test_cpu_flag(CIF_FPU))
__load_fpu_regs();
if (IS_ENABLED(CONFIG_DEBUG_ENTRY))
debug_user_asce(1);
}
#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() & 0xff);
}
#define arch_exit_to_user_mode_prepare arch_exit_to_user_mode_prepare
static inline bool on_thread_stack(void)
{
return !(((unsigned long)(current->stack) ^ current_stack_pointer()) & ~(THREAD_SIZE - 1));
}
#endif
|
