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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-05-14 13:48:19 +0200 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-07-27 08:13:25 +0200 |
| commit | 409771d258e9dd71c30f3c9520fd2b796ffc40f0 (patch) | |
| tree | 68678275563114e9d381ae587fc80bd4d34a7e90 /arch/x86/xen/suspend.c | |
| parent | xen: Fix find_unbound_irq in presence of ioapic irqs. (diff) | |
| download | linux-409771d258e9dd71c30f3c9520fd2b796ffc40f0.tar.xz linux-409771d258e9dd71c30f3c9520fd2b796ffc40f0.zip | |
x86: Use xen_vcpuop_clockevent, xen_clocksource and xen wallclock.
Use xen_vcpuop_clockevent instead of hpet and APIC timers as main
clockevent device on all vcpus, use the xen wallclock time as wallclock
instead of rtc and use xen_clocksource as clocksource.
The pv clock algorithm needs to work correctly for the xen_clocksource
and xen wallclock to be usable, only modern Xen versions offer a
reliable pv clock in HVM guests (XENFEAT_hvm_safe_pvclock).
Using the hpet as clocksource means a VMEXIT every time we read/write to
the hpet mmio addresses, pvclock give us a better rating without
VMEXITs. Same goes for the xen wallclock and xen_vcpuop_clockevent
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Don Dutile <ddutile@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'arch/x86/xen/suspend.c')
| -rw-r--r-- | arch/x86/xen/suspend.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/xen/suspend.c b/arch/x86/xen/suspend.c index d07479c340f5..1d789d56877c 100644 --- a/arch/x86/xen/suspend.c +++ b/arch/x86/xen/suspend.c @@ -28,8 +28,14 @@ void xen_pre_suspend(void) void xen_hvm_post_suspend(int suspend_cancelled) { + int cpu; xen_hvm_init_shared_info(); xen_callback_vector(); + if (xen_feature(XENFEAT_hvm_safe_pvclock)) { + for_each_online_cpu(cpu) { + xen_setup_runstate_info(cpu); + } + } } void xen_post_suspend(int suspend_cancelled) |