Commit-ID: 3d18d661aaad5a22f4d37a0592acc9d784f2a11b
Gitweb: http://git.kernel.org/tip/3d18d661aaad5a22f4d37a0592acc9d784f2a11b
Author: Nicolai Stange <nicstange@xxxxxxxxx>
AuthorDate: Thu, 30 Mar 2017 22:06:42 +0200
Committer: John Stultz <john.stultz@xxxxxxxxxx>
CommitDate: Fri, 14 Apr 2017 13:11:03 -0700
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 <mingo@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Cc: Richard Cochran <richardcochran@xxxxxxxxx>
Cc: Prarit Bhargava <prarit@xxxxxxxxxx>
Cc: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Signed-off-by: Nicolai Stange <nicstange@xxxxxxxxx>
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
---
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 1e69956..7a30892 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,
--
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