The x86 platform operations are fairly isolated, so we can change them from using timespec to timespec64. I 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 we should ideally find a replacement anyway. I've added a comment about it there.
Signed-off-by: Arnd Bergmann arnd@arndb.de --- arch/x86/include/asm/intel_mid_vrtc.h | 4 ++-- arch/x86/include/asm/mc146818rtc.h | 4 ++-- arch/x86/include/asm/pvclock.h | 2 +- arch/x86/include/asm/x86_init.h | 6 +++--- arch/x86/kernel/kvmclock.c | 4 ++-- arch/x86/kernel/pvclock.c | 12 +++++++++--- arch/x86/kernel/rtc.c | 16 ++++++++-------- arch/x86/platform/intel-mid/intel_mid_vrtc.c | 10 +++++----- arch/x86/xen/time.c | 10 +++++----- 9 files changed, 37 insertions(+), 31 deletions(-)
diff --git a/arch/x86/include/asm/intel_mid_vrtc.h b/arch/x86/include/asm/intel_mid_vrtc.h index 86ff4685c409..19202320f0be 100644 --- a/arch/x86/include/asm/intel_mid_vrtc.h +++ b/arch/x86/include/asm/intel_mid_vrtc.h @@ -3,7 +3,7 @@
extern unsigned char vrtc_cmos_read(unsigned char reg); extern void vrtc_cmos_write(unsigned char val, unsigned char reg); -extern void vrtc_get_time(struct timespec *now); -extern int vrtc_set_mmss(const struct timespec *now); +extern void vrtc_get_time(struct timespec64 *now); +extern int vrtc_set_mmss(const struct timespec64 *now);
#endif diff --git a/arch/x86/include/asm/mc146818rtc.h b/arch/x86/include/asm/mc146818rtc.h index 24acd9ba7837..1b574e5eb3b2 100644 --- a/arch/x86/include/asm/mc146818rtc.h +++ b/arch/x86/include/asm/mc146818rtc.h @@ -94,8 +94,8 @@ static inline unsigned char current_lock_cmos_reg(void) unsigned char rtc_cmos_read(unsigned char addr); void rtc_cmos_write(unsigned char val, unsigned char addr);
-extern int mach_set_rtc_mmss(const struct timespec *now); -extern void mach_get_cmos_time(struct timespec *now); +extern int mach_set_rtc_mmss(const struct timespec64 *now); +extern void mach_get_cmos_time(struct timespec64 *now);
#define RTC_IRQ 8
diff --git a/arch/x86/include/asm/pvclock.h b/arch/x86/include/asm/pvclock.h index 448cfe1b48cf..fc3138fd3aff 100644 --- a/arch/x86/include/asm/pvclock.h +++ b/arch/x86/include/asm/pvclock.h @@ -20,7 +20,7 @@ void pvclock_set_flags(u8 flags); unsigned long pvclock_tsc_khz(struct pvclock_vcpu_time_info *src); void pvclock_read_wallclock(struct pvclock_wall_clock *wall, struct pvclock_vcpu_time_info *vcpu, - struct timespec *ts); + struct timespec64 *ts); void pvclock_resume(void);
void pvclock_touch_watchdogs(void); diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h index f45acdf45957..0c5007b72916 100644 --- a/arch/x86/include/asm/x86_init.h +++ b/arch/x86/include/asm/x86_init.h @@ -141,7 +141,7 @@ struct x86_cpuinit_ops { void (*fixup_cpu_id)(struct cpuinfo_x86 *c, int node); };
-struct timespec; +struct timespec64;
/** * struct x86_legacy_devices - legacy x86 devices @@ -223,8 +223,8 @@ struct x86_legacy_features { struct x86_platform_ops { unsigned long (*calibrate_cpu)(void); unsigned long (*calibrate_tsc)(void); - void (*get_wallclock)(struct timespec *ts); - int (*set_wallclock)(const struct timespec *ts); + void (*get_wallclock)(struct timespec64 *ts); + int (*set_wallclock)(const struct timespec64 *ts); void (*iommu_shutdown)(void); bool (*is_untracked_pat_range)(u64 start, u64 end); void (*nmi_init)(void); diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c index d88967659098..01c76e8cd4be 100644 --- a/arch/x86/kernel/kvmclock.c +++ b/arch/x86/kernel/kvmclock.c @@ -58,7 +58,7 @@ EXPORT_SYMBOL_GPL(pvclock_pvti_cpu0_va); * have elapsed since the hypervisor wrote the data. So we try to account for * that with system time */ -static void kvm_get_wallclock(struct timespec *now) +static void kvm_get_wallclock(struct timespec64 *now) { struct pvclock_vcpu_time_info *vcpu_time; int low, high; @@ -77,7 +77,7 @@ static void kvm_get_wallclock(struct timespec *now) put_cpu(); }
-static int kvm_set_wallclock(const struct timespec *now) +static int kvm_set_wallclock(const struct timespec64 *now) { return -1; } diff --git a/arch/x86/kernel/pvclock.c b/arch/x86/kernel/pvclock.c index 5c3f6d6a5078..1a7084ad07b9 100644 --- a/arch/x86/kernel/pvclock.c +++ b/arch/x86/kernel/pvclock.c @@ -121,11 +121,11 @@ u64 pvclock_clocksource_read(struct pvclock_vcpu_time_info *src)
void pvclock_read_wallclock(struct pvclock_wall_clock *wall_clock, struct pvclock_vcpu_time_info *vcpu_time, - struct timespec *ts) + struct timespec64 *ts) { u32 version; u64 delta; - struct timespec now; + struct timespec64 now;
/* get wallclock at system boot */ do { @@ -136,11 +136,17 @@ void pvclock_read_wallclock(struct pvclock_wall_clock *wall_clock, rmb(); /* fetch time before checking version */ } while ((wall_clock->version & 1) || (version != wall_clock->version));
+ /* + * Note: wall_clock->sec is a u32 value, so it can only store dates + * between 1970 and 2106. To allow times beyond that, we need to + * create a new hypercall interface with an extended pvclock_wall_clock + * structure like ARM has. + */ delta = pvclock_clocksource_read(vcpu_time); /* time since system boot */ delta += now.tv_sec * (u64)NSEC_PER_SEC + now.tv_nsec;
now.tv_nsec = do_div(delta, NSEC_PER_SEC); now.tv_sec = delta;
- set_normalized_timespec(ts, now.tv_sec, now.tv_nsec); + set_normalized_timespec64(ts, now.tv_sec, now.tv_nsec); } diff --git a/arch/x86/kernel/rtc.c b/arch/x86/kernel/rtc.c index 5b21cb7d84d6..f5a687c38c6d 100644 --- a/arch/x86/kernel/rtc.c +++ b/arch/x86/kernel/rtc.c @@ -38,13 +38,13 @@ EXPORT_SYMBOL(rtc_lock); * jump to the next second precisely 500 ms later. Check the Motorola * MC146818A or Dallas DS12887 data sheet for details. */ -int mach_set_rtc_mmss(const struct timespec *now) +int mach_set_rtc_mmss(const struct timespec64 *now) { - unsigned long nowtime = now->tv_sec; + time64_t nowtime = now->tv_sec; struct rtc_time tm; int retval = 0;
- rtc_time_to_tm(nowtime, &tm); + rtc_time64_to_tm(nowtime, &tm); if (!rtc_valid_tm(&tm)) { retval = mc146818_set_time(&tm); if (retval) @@ -52,14 +52,14 @@ int mach_set_rtc_mmss(const struct timespec *now) __func__, retval); } else { printk(KERN_ERR - "%s: Invalid RTC value: write of %lx to RTC failed\n", + "%s: Invalid RTC value: write of %llx to RTC failed\n", __func__, nowtime); retval = -EINVAL; } return retval; }
-void mach_get_cmos_time(struct timespec *now) +void mach_get_cmos_time(struct timespec64 *now) { unsigned int status, year, mon, day, hour, min, sec, century = 0; unsigned long flags; @@ -117,7 +117,7 @@ void mach_get_cmos_time(struct timespec *now) } else year += CMOS_YEARS_OFFS;
- now->tv_sec = mktime(year, mon, day, hour, min, sec); + now->tv_sec = mktime64(year, mon, day, hour, min, sec); now->tv_nsec = 0; }
@@ -144,13 +144,13 @@ void rtc_cmos_write(unsigned char val, unsigned char addr) } EXPORT_SYMBOL(rtc_cmos_write);
-int update_persistent_clock(struct timespec now) +int update_persistent_clock64(struct timespec64 now) { return x86_platform.set_wallclock(&now); }
/* not static: needed by APM */ -void read_persistent_clock(struct timespec *ts) +void read_persistent_clock64(struct timespec64 *ts) { x86_platform.get_wallclock(ts); } diff --git a/arch/x86/platform/intel-mid/intel_mid_vrtc.c b/arch/x86/platform/intel-mid/intel_mid_vrtc.c index 58024862a7eb..d68b9b10481d 100644 --- a/arch/x86/platform/intel-mid/intel_mid_vrtc.c +++ b/arch/x86/platform/intel-mid/intel_mid_vrtc.c @@ -57,7 +57,7 @@ void vrtc_cmos_write(unsigned char val, unsigned char reg) } EXPORT_SYMBOL_GPL(vrtc_cmos_write);
-void vrtc_get_time(struct timespec *now) +void vrtc_get_time(struct timespec64 *now) { u8 sec, min, hour, mday, mon; unsigned long flags; @@ -83,18 +83,18 @@ void vrtc_get_time(struct timespec *now) pr_info("vRTC: sec: %d min: %d hour: %d day: %d " "mon: %d year: %d\n", sec, min, hour, mday, mon, year);
- now->tv_sec = mktime(year, mon, mday, hour, min, sec); + now->tv_sec = mktime64(year, mon, mday, hour, min, sec); now->tv_nsec = 0; }
-int vrtc_set_mmss(const struct timespec *now) +int vrtc_set_mmss(const struct timespec64 *now) { unsigned long flags; struct rtc_time tm; int year; int retval = 0;
- rtc_time_to_tm(now->tv_sec, &tm); + rtc_time64_to_tm(now->tv_sec, &tm); if (!rtc_valid_tm(&tm) && tm.tm_year >= 72) { /* * tm.year is the number of years since 1900, and the @@ -110,7 +110,7 @@ int vrtc_set_mmss(const struct timespec *now) vrtc_cmos_write(tm.tm_sec, RTC_SECONDS); spin_unlock_irqrestore(&rtc_lock, flags); } else { - pr_err("%s: Invalid vRTC value: write of %lx to vRTC failed\n", + pr_err("%s: Invalid vRTC value: write of %llx to vRTC failed\n", __func__, now->tv_sec); retval = -EINVAL; } diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c index 1ecb05db3632..b1eed21a7b46 100644 --- a/arch/x86/xen/time.c +++ b/arch/x86/xen/time.c @@ -56,7 +56,7 @@ 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); @@ -67,12 +67,12 @@ 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 -1; } @@ -373,7 +373,7 @@ static const struct pv_time_ops xen_time_ops __initconst = { static void __init xen_time_init(void) { 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()) @@ -391,7 +391,7 @@ 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);