From 3d18d661aaad5a22f4d37a0592acc9d784f2a11b Mon Sep 17 00:00:00 2001 From: Nicolai Stange Date: Thu, 30 Mar 2017 22:06:42 +0200 Subject: [PATCH] x86/xen/time: Set ->min_delta_ticks and ->max_delta_ticks In preparation for making the clockevents core NTP correction aware, all clockevent device drivers must set ->min_delta_ticks and ->max_delta_ticks rather than ->min_delta_ns and ->max_delta_ns: a clockevent device's rate is going to change dynamically and thus, the ratio of ns to ticks ceases to stay invariant. Make the x86 arch's xen clockevent driver initialize these fields properly. This patch alone doesn't introduce any change in functionality as the clockevents core still looks exclusively at the (untouched) ->min_delta_ns and ->max_delta_ns. As soon as this has changed, a followup patch will purge the initialization of ->min_delta_ns and ->max_delta_ns from this driver. Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Daniel Lezcano Cc: Richard Cochran Cc: Prarit Bhargava Cc: Stephen Boyd Cc: Boris Ostrovsky Cc: Juergen Gross Cc: "H. Peter Anvin" Cc: x86@kernel.org Cc: xen-devel@lists.xenproject.org Reviewed-by: Boris Ostrovsky Signed-off-by: Nicolai Stange Signed-off-by: John Stultz --- arch/x86/xen/time.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c index 1e69956d7852..7a3089285c59 100644 --- a/arch/x86/xen/time.c +++ b/arch/x86/xen/time.c @@ -209,7 +209,9 @@ static const struct clock_event_device xen_timerop_clockevent = { .features = CLOCK_EVT_FEAT_ONESHOT, .max_delta_ns = 0xffffffff, + .max_delta_ticks = 0xffffffff, .min_delta_ns = TIMER_SLOP, + .min_delta_ticks = TIMER_SLOP, .mult = 1, .shift = 0, @@ -268,7 +270,9 @@ static const struct clock_event_device xen_vcpuop_clockevent = { .features = CLOCK_EVT_FEAT_ONESHOT, .max_delta_ns = 0xffffffff, + .max_delta_ticks = 0xffffffff, .min_delta_ns = TIMER_SLOP, + .min_delta_ticks = TIMER_SLOP, .mult = 1, .shift = 0, -- 2.39.5