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 #include <asm/cacheflush.h> 10 11 extern struct vdso_data *vdso_data; 12 extern bool cntvct_ok; 13 14 /* 15 * Update the vDSO data page to keep in sync with kernel timekeeping. 16 */ 17 static __always_inline __arm_get_k_vdso_data(void)18struct vdso_data *__arm_get_k_vdso_data(void) 19 { 20 return vdso_data; 21 } 22 #define __arch_get_k_vdso_data __arm_get_k_vdso_data 23 24 static __always_inline __arm_sync_vdso_data(struct vdso_data * vdata)25void __arm_sync_vdso_data(struct vdso_data *vdata) 26 { 27 flush_dcache_page(virt_to_page(vdata)); 28 } 29 #define __arch_sync_vdso_data __arm_sync_vdso_data 30 31 /* The asm-generic header needs to be included after the definitions above */ 32 #include <asm-generic/vdso/vsyscall.h> 33 34 #endif /* !__ASSEMBLY__ */ 35 36 #endif /* __ASM_VDSO_VSYSCALL_H */ 37