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x66/vdso: Add CLOCK_TAI support 

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>
Tested-by: Matt Rickard <matt@softrans.com.au>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Florian Weimer <fweimer@redhat.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: devel@linuxdriverproject.org
Cc: virtualization@lists.linux-foundation.org
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Juergen Gross <jgross@suse.com>
Link: https://lkml.kernel.org/r/20180917130707.823878601@linutronix.de
hifive-unleashed-5.1
Thomas Gleixner 2018-09-17 14:45:44 +02:00
parent 3e89bf35eb
commit 315f28fa3a
2 changed files with 6 additions and 2 deletions
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4
arch/x86/entry/vsyscall/vsyscall_gtod.c
View File

@ -51,6 +51,10 @@ void update_vsyscall(struct timekeeper *tk)
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;

4
arch/x86/include/asm/vgtod.h
View File

@ -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))
/*