1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef __ASM_VDSO_VSYSCALL_H 3*4882a593Smuzhiyun #define __ASM_VDSO_VSYSCALL_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #include <linux/timekeeper_internal.h> 8*4882a593Smuzhiyun #include <vdso/datapage.h> 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #define VDSO_PRECISION_MASK ~(0xFF00ULL<<48) 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun extern struct vdso_data *vdso_data; 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun /* 15*4882a593Smuzhiyun * Update the vDSO data page to keep in sync with kernel timekeeping. 16*4882a593Smuzhiyun */ 17*4882a593Smuzhiyun static __always_inline __arm64_get_k_vdso_data(void)18*4882a593Smuzhiyunstruct vdso_data *__arm64_get_k_vdso_data(void) 19*4882a593Smuzhiyun { 20*4882a593Smuzhiyun return vdso_data; 21*4882a593Smuzhiyun } 22*4882a593Smuzhiyun #define __arch_get_k_vdso_data __arm64_get_k_vdso_data 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun static __always_inline __arm64_update_vsyscall(struct vdso_data * vdata,struct timekeeper * tk)25*4882a593Smuzhiyunvoid __arm64_update_vsyscall(struct vdso_data *vdata, struct timekeeper *tk) 26*4882a593Smuzhiyun { 27*4882a593Smuzhiyun vdata[CS_HRES_COARSE].mask = VDSO_PRECISION_MASK; 28*4882a593Smuzhiyun vdata[CS_RAW].mask = VDSO_PRECISION_MASK; 29*4882a593Smuzhiyun } 30*4882a593Smuzhiyun #define __arch_update_vsyscall __arm64_update_vsyscall 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun /* The asm-generic header needs to be included after the definitions above */ 33*4882a593Smuzhiyun #include <asm-generic/vdso/vsyscall.h> 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun #endif /* !__ASSEMBLY__ */ 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun #endif /* __ASM_VDSO_VSYSCALL_H */ 38