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 12 extern struct vdso_data *vdso_data; 13 14 /* 15 * Update the vDSO data page to keep in sync with kernel timekeeping. 16 */ 17 static __always_inline 18 struct 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 24 static __always_inline 25 int __arm64_get_clock_mode(struct timekeeper *tk) 26 { 27 u32 use_syscall = !tk->tkr_mono.clock->archdata.vdso_direct; 28 29 return use_syscall; 30 } 31 #define __arch_get_clock_mode __arm64_get_clock_mode 32 33 static __always_inline 34 int __arm64_use_vsyscall(struct vdso_data *vdata) 35 { 36 return !vdata[CS_HRES_COARSE].clock_mode; 37 } 38 #define __arch_use_vsyscall __arm64_use_vsyscall 39 40 static __always_inline 41 void __arm64_update_vsyscall(struct vdso_data *vdata, struct timekeeper *tk) 42 { 43 vdata[CS_HRES_COARSE].mask = VDSO_PRECISION_MASK; 44 vdata[CS_RAW].mask = VDSO_PRECISION_MASK; 45 } 46 #define __arch_update_vsyscall __arm64_update_vsyscall 47 48 /* The asm-generic header needs to be included after the definitions above */ 49 #include <asm-generic/vdso/vsyscall.h> 50 51 #endif /* !__ASSEMBLY__ */ 52 53 #endif /* __ASM_VDSO_VSYSCALL_H */ 54