[PATCH v2 04/28] kernel: Add masks support for Raw and NTP time
From: Vincenzo Frascino <vincenzo.frascino@arm.com>
Date: 2018-11-29 17:07:07
Also in:
linux-arch
Subsystem:
generic vdso library, the rest · Maintainers:
Andy Lutomirski, Thomas Gleixner, Vincenzo Frascino, Linus Torvalds
Depending on the clocksource selected there can be supported a different resolution hence we require a mask to be applied to the time calculation. This patch exposes the mask in the datapage for Raw and NTP adjusted clock. Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> --- include/vdso/datapage.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/include/vdso/datapage.h b/include/vdso/datapage.h
index d50a108afaed..0a7bdccf5773 100644
--- a/include/vdso/datapage.h
+++ b/include/vdso/datapage.h@@ -34,6 +34,8 @@ struct vdso_data { __u64 wtm_clock_nsec; __u64 btm_nsec; /* Monotonic to boot time */ __u64 tai_sec; /* International Atomic Time */ + __u64 cs_mono_mask; /* NTP-adjusted clocksource mask */ + __u64 cs_raw_mask; /* Raw clocksource mask */ __u32 tb_seq_count; /* Timebase sequence counter */ __u32 cs_mono_mult; /* NTP-adjusted clocksource multiplier */ __u32 cs_shift; /* Clocksource shift (mono = raw) */
--
2.19.2
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