The generic vDSO library provides an implementation of clock_getres() that can be leveraged by each architecture.
Add clock_getres() entry point on mips. Cc: Ralf Baechle <[email protected]> Cc: Paul Burton <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> --- arch/mips/include/asm/vdso/gettimeofday.h | 26 +++++++++++++++++++++++ arch/mips/vdso/vdso.lds.S | 1 + arch/mips/vdso/vgettimeofday.c | 12 +++++++++++ 3 files changed, 39 insertions(+) diff --git a/arch/mips/include/asm/vdso/gettimeofday.h b/arch/mips/include/asm/vdso/gettimeofday.h index aa20865b288b..c59fe08b0347 100644 --- a/arch/mips/include/asm/vdso/gettimeofday.h +++ b/arch/mips/include/asm/vdso/gettimeofday.h @@ -22,6 +22,8 @@ #include <asm/unistd.h> #include <asm/vdso.h> +#define VDSO_HAS_CLOCK_GETRES 1 + #ifdef CONFIG_MIPS_CLOCK_VSYSCALL static __always_inline long gettimeofday_fallback( @@ -79,6 +81,30 @@ static __always_inline long clock_gettime_fallback( return error ? -ret : ret; } +static __always_inline int clock_getres_fallback( + clockid_t _clkid, + struct __kernel_timespec *_ts) +{ + register struct __kernel_timespec *ts asm("a1") = _ts; + register clockid_t clkid asm("a0") = _clkid; + register long ret asm("v0"); +#if _MIPS_SIM == _MIPS_SIM_ABI64 + register long nr asm("v0") = __NR_clock_getres; +#else + register long nr asm("v0") = __NR_clock_getres_time64; +#endif + register long error asm("a3"); + + asm volatile( + " syscall\n" + : "=r" (ret), "=r" (error) + : "r" (clkid), "r" (ts), "r" (nr) + : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", + "$14", "$15", "$24", "$25", "hi", "lo", "memory"); + + return error ? -ret : ret; +} + #ifdef CONFIG_CSRC_R4K static __always_inline u64 read_r4k_count(void) diff --git a/arch/mips/vdso/vdso.lds.S b/arch/mips/vdso/vdso.lds.S index 94d90c440590..ad9f2f2c0c97 100644 --- a/arch/mips/vdso/vdso.lds.S +++ b/arch/mips/vdso/vdso.lds.S @@ -95,6 +95,7 @@ VERSION global: __vdso_clock_gettime; __vdso_gettimeofday; + __vdso_clock_getres; #endif local: *; }; diff --git a/arch/mips/vdso/vgettimeofday.c b/arch/mips/vdso/vgettimeofday.c index 1c46dace041e..48e1ab32204b 100644 --- a/arch/mips/vdso/vgettimeofday.c +++ b/arch/mips/vdso/vgettimeofday.c @@ -23,6 +23,12 @@ int __vdso_gettimeofday(struct __kernel_old_timeval *tv, return __cvdso_gettimeofday(tv, tz); } +int __vdso_clock_getres(clockid_t clock_id, + struct old_timespec32 *res) +{ + return __cvdso_clock_getres_time32(clock_id, res); +} + #else int __vdso_clock_gettime(clockid_t clock, @@ -37,4 +43,10 @@ int __vdso_gettimeofday(struct __kernel_old_timeval *tv, return __cvdso_gettimeofday(tv, tz); } +int __vdso_clock_getres(clockid_t clock_id, + struct __kernel_timespec *res) +{ + return __cvdso_clock_getres(clock_id, res); +} + #endif -- 2.21.0
