From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>,
x86@kernel.org, Peter Zijlstra <peterz@infradead.org>,
Matt Rickard <matt@softrans.com.au>,
Stephen Boyd <sboyd@kernel.org>,
John Stultz <john.stultz@linaro.org>,
Florian Weimer <fweimer@redhat.com>,
"K. Y. Srinivasan" <kys@microsoft.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
devel@linuxdriverproject.org,
virtualization@lists.linux-foundation.org,
Paolo Bonzini <pbonzini@redhat.com>,
Arnd Bergmann <arnd@arndb.de>, Juergen Gross <jgross@suse.com>
Subject: [patch V2 11/11] x66/vdso: Add CLOCK_TAI support
Date: Mon, 17 Sep 2018 14:45:44 +0200 [thread overview]
Message-ID: <20180917130707.823878601@linutronix.de> (raw)
In-Reply-To: 20180917124533.329334911@linutronix.de
[-- Attachment #1: x66-vdso--Add-CLOCK_TAI-support.patch --]
[-- Type: text/plain, Size: 1328 bytes --]
With the storage array in place it's now trivial to support CLOCK_TAI in
the vdso. Extend the base time storage array and add the update code.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
V2: Remove the masking trick
arch/x86/entry/vsyscall/vsyscall_gtod.c | 4 ++++
arch/x86/include/asm/vgtod.h | 4 ++--
2 files changed, 6 insertions(+), 2 deletions(-)
--- a/arch/x86/entry/vsyscall/vsyscall_gtod.c
+++ b/arch/x86/entry/vsyscall/vsyscall_gtod.c
@@ -51,6 +51,10 @@ void update_vsyscall(struct timekeeper *
base->sec = tk->xtime_sec;
base->nsec = tk->tkr_mono.xtime_nsec;
+ base = &vdata->basetime[CLOCK_TAI];
+ base->sec = tk->xtime_sec + (s64)tk->tai_offset;
+ base->nsec = tk->tkr_mono.xtime_nsec;
+
base = &vdata->basetime[CLOCK_MONOTONIC];
base->sec = tk->xtime_sec + tk->wall_to_monotonic.tv_sec;
nsec = tk->tkr_mono.xtime_nsec;
--- a/arch/x86/include/asm/vgtod.h
+++ b/arch/x86/include/asm/vgtod.h
@@ -18,8 +18,8 @@ struct vgtod_ts {
u64 nsec;
};
-#define VGTOD_BASES (CLOCK_MONOTONIC_COARSE + 1)
-#define VGTOD_HRES (BIT(CLOCK_REALTIME) | BIT(CLOCK_MONOTONIC))
+#define VGTOD_BASES (CLOCK_TAI + 1)
+#define VGTOD_HRES (BIT(CLOCK_REALTIME) | BIT(CLOCK_MONOTONIC) | BIT(CLOCK_TAI))
#define VGTOD_COARSE (BIT(CLOCK_REALTIME_COARSE) | BIT(CLOCK_MONOTONIC_COARSE))
/*
next prev parent reply other threads:[~2018-09-17 13:09 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-17 12:45 [patch V2 00/11] x86/vdso: Cleanups, simmplifications and CLOCK_TAI support Thomas Gleixner
2018-09-17 12:45 ` [patch V2 01/11] clocksource: Provide clocksource_arch_init() Thomas Gleixner
2018-09-17 20:05 ` John Stultz
2018-10-04 21:03 ` [tip:x86/vdso] " tip-bot for Thomas Gleixner
2018-09-17 12:45 ` [patch V2 02/11] x86/time: Implement clocksource_arch_init() Thomas Gleixner
2018-10-04 21:04 ` [tip:x86/vdso] " tip-bot for Thomas Gleixner
2018-09-17 12:45 ` [patch V2 03/11] x86/vdso: Enforce 64bit clocksource Thomas Gleixner
2018-10-04 21:05 ` [tip:x86/vdso] " tip-bot for Thomas Gleixner
2018-09-17 12:45 ` [patch V2 04/11] x86/vdso: Use unsigned int consistently for vsyscall_gtod_data::seq Thomas Gleixner
2018-10-04 21:05 ` [tip:x86/vdso] x86/vdso: Use unsigned int consistently for vsyscall_gtod_data:: Seq tip-bot for Thomas Gleixner
2018-09-17 12:45 ` [patch V2 05/11] x86/vdso: Introduce and use vgtod_ts Thomas Gleixner
2018-10-04 21:06 ` [tip:x86/vdso] " tip-bot for Thomas Gleixner
2018-09-17 12:45 ` [patch V2 06/11] x86/vdso: Collapse high resolution functions Thomas Gleixner
2018-10-04 21:06 ` [tip:x86/vdso] " tip-bot for Thomas Gleixner
2018-09-17 12:45 ` [patch V2 07/11] x86/vdso: Collapse coarse functions Thomas Gleixner
2018-10-04 21:07 ` [tip:x86/vdso] " tip-bot for Thomas Gleixner
2018-09-17 12:45 ` [patch V2 08/11] x86/vdso: Replace the clockid switch case Thomas Gleixner
2018-10-04 21:07 ` [tip:x86/vdso] " tip-bot for Thomas Gleixner
2018-09-17 12:45 ` [patch V2 09/11] x86/vdso: Simplify the invalid vclock case Thomas Gleixner
2018-10-04 21:08 ` [tip:x86/vdso] " tip-bot for Thomas Gleixner
2018-09-17 12:45 ` [patch V2 10/11] x86/vdso: Move cycle_last handling into the caller Thomas Gleixner
2018-10-04 21:09 ` [tip:x86/vdso] " tip-bot for Thomas Gleixner
2018-09-17 12:45 ` Thomas Gleixner [this message]
2018-09-30 2:56 ` [patch V2 11/11] x66/vdso: Add CLOCK_TAI support Matthew Rickard
2018-10-04 21:09 ` [tip:x86/vdso] " tip-bot for Thomas Gleixner
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