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 <vdso/datapage.h>
8 
9 #define VDSO_PRECISION_MASK	~(0xFF00ULL<<48)
10 
11 
12 /*
13  * Update the vDSO data page to keep in sync with kernel timekeeping.
14  */
15 static __always_inline
__arm64_update_vsyscall(struct vdso_time_data * vdata)16 void __arm64_update_vsyscall(struct vdso_time_data *vdata)
17 {
18 	vdata->clock_data[CS_HRES_COARSE].mask	= VDSO_PRECISION_MASK;
19 	vdata->clock_data[CS_RAW].mask		= VDSO_PRECISION_MASK;
20 }
21 #define __arch_update_vsyscall __arm64_update_vsyscall
22 
23 /* The asm-generic header needs to be included after the definitions above */
24 #include <asm-generic/vdso/vsyscall.h>
25 
26 #endif /* !__ASSEMBLY__ */
27 
28 #endif /* __ASM_VDSO_VSYSCALL_H */
29