1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_VDSO_VSYSCALL_H
3#define __ASM_VDSO_VSYSCALL_H
4
5#ifndef __ASSEMBLY__
6
7#include <linux/timekeeper_internal.h>
8#include <vdso/datapage.h>
9
10#define VDSO_PRECISION_MASK	~(0xFF00ULL<<48)
11
12extern struct vdso_data *vdso_data;
13
14/*
15 * Update the vDSO data page to keep in sync with kernel timekeeping.
16 */
17static __always_inline
18struct vdso_data *__arm64_get_k_vdso_data(void)
19{
20	return vdso_data;
21}
22#define __arch_get_k_vdso_data __arm64_get_k_vdso_data
23
24static __always_inline
25void __arm64_update_vsyscall(struct vdso_data *vdata, struct timekeeper *tk)
26{
27	vdata[CS_HRES_COARSE].mask	= VDSO_PRECISION_MASK;
28	vdata[CS_RAW].mask		= VDSO_PRECISION_MASK;
29}
30#define __arch_update_vsyscall __arm64_update_vsyscall
31
32/* The asm-generic header needs to be included after the definitions above */
33#include <asm-generic/vdso/vsyscall.h>
34
35#endif /* !__ASSEMBLY__ */
36
37#endif /* __ASM_VDSO_VSYSCALL_H */
38