arch/arm64/include/asm/vdso/vsyscall.h

   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 void __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 */