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x86: Convert x86_platform_ops to timespec64

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The x86 platform operations are fairly isolated, so it's easy to change
them from using timespec to timespec64. It has been checked that all the
users and callers are safe, and there is only one critical function that is
broken beyond 2106:

  pvclock_read_wallclock() uses a 32-bit number of seconds since the epoch
  to communicate the boot time between host and guest in a virtual
  environment. This will work until 2106, but fixing this is outside the
  scope of this change, Add a comment at least.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Acked-by: Radim Krčmář <rkrcmar@redhat.com>
Acked-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: jailhouse-dev@googlegroups.com
Cc: Borislav Petkov <bp@suse.de>
Cc: kvm@vger.kernel.org
Cc: y2038@lists.linaro.org
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: xen-devel@lists.xenproject.org
Cc: John Stultz <john.stultz@linaro.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Joao Martins <joao.m.martins@oracle.com>
Link: https://lkml.kernel.org/r/20180427201435.3194219-1-arnd@arndb.de
This commit is contained in:
Arnd Bergmann
2018-04-27 22:13:23 +02:00
committed by Thomas Gleixner
parent 06aa376903
commit e27c49291a
10 changed files with 38 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
arch/x86/xen/time.c
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@@ -57,7 +57,7 @@ static u64 xen_clocksource_get_cycles(struct clocksource *cs)
return xen_clocksource_read();
}
static void xen_read_wallclock(struct timespec *ts)
static void xen_read_wallclock(struct timespec64 *ts)
{
struct shared_info *s = HYPERVISOR_shared_info;
struct pvclock_wall_clock *wall_clock = &(s->wc);
@@ -68,12 +68,12 @@ static void xen_read_wallclock(struct timespec *ts)
put_cpu_var(xen_vcpu);
}
static void xen_get_wallclock(struct timespec *now)
static void xen_get_wallclock(struct timespec64 *now)
{
xen_read_wallclock(now);
}
static int xen_set_wallclock(const struct timespec *now)
static int xen_set_wallclock(const struct timespec64 *now)
{
return -ENODEV;
}
@@ -461,7 +461,7 @@ static void __init xen_time_init(void)
{
struct pvclock_vcpu_time_info *pvti;
int cpu = smp_processor_id();
struct timespec tp;
struct timespec64 tp;
/* As Dom0 is never moved, no penalty on using TSC there */
if (xen_initial_domain())
@@ -479,7 +479,7 @@ static void __init xen_time_init(void)
/* Set initial system time with full resolution */
xen_read_wallclock(&tp);
do_settimeofday(&tp);
do_settimeofday64(&tp);
setup_force_cpu_cap(X86_FEATURE_TSC);