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/hrtimer.h> 8 #include <linux/timekeeper_internal.h> 9 #include <vdso/datapage.h> 10 #include <asm/vgtod.h> 11 #include <asm/vvar.h> 12 13 int vclocks_used __read_mostly; 14 15 DEFINE_VVAR(struct vdso_data, _vdso_data); 16 /* 17 * Update the vDSO data page to keep in sync with kernel timekeeping. 18 */ 19 static __always_inline 20 struct vdso_data *__x86_get_k_vdso_data(void) 21 { 22 return _vdso_data; 23 } 24 #define __arch_get_k_vdso_data __x86_get_k_vdso_data 25 26 static __always_inline 27 int __x86_get_clock_mode(struct timekeeper *tk) 28 { 29 int vclock_mode = tk->tkr_mono.clock->archdata.vclock_mode; 30 31 /* Mark the new vclock used. */ 32 BUILD_BUG_ON(VCLOCK_MAX >= 32); 33 WRITE_ONCE(vclocks_used, READ_ONCE(vclocks_used) | (1 << vclock_mode)); 34 35 return vclock_mode; 36 } 37 #define __arch_get_clock_mode __x86_get_clock_mode 38 39 /* The asm-generic header needs to be included after the definitions above */ 40 #include <asm-generic/vdso/vsyscall.h> 41 42 #endif /* !__ASSEMBLY__ */ 43 44 #endif /* __ASM_VDSO_VSYSCALL_H */ 45