diff options
| -rw-r--r-- | arch/x86/include/asm/vdso/gettimeofday.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/include/asm/vdso/gettimeofday.h b/arch/x86/include/asm/vdso/gettimeofday.h index 9a6dc9b4ec99..fb81fea99093 100644 --- a/arch/x86/include/asm/vdso/gettimeofday.h +++ b/arch/x86/include/asm/vdso/gettimeofday.h @@ -271,6 +271,24 @@ static __always_inline const struct vdso_data *__arch_get_vdso_data(void) return __vdso_data; } +static inline bool arch_vdso_clocksource_ok(const struct vdso_data *vd) +{ + return true; +} +#define vdso_clocksource_ok arch_vdso_clocksource_ok + +/* + * Clocksource read value validation to handle PV and HyperV clocksources + * which can be invalidated asynchronously and indicate invalidation by + * returning U64_MAX, which can be effectively tested by checking for a + * negative value after casting it to s64. + */ +static inline bool arch_vdso_cycles_ok(u64 cycles) +{ + return (s64)cycles >= 0; +} +#define vdso_cycles_ok arch_vdso_cycles_ok + /* * x86 specific delta calculation. * |