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x86: kvm: introduce periodic global clock updates

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commit 0061d53daf introduced a mechanism to execute a global clock
update for a vm. We can apply this periodically in order to propagate
host NTP corrections. Also, if all vcpus of a vm are pinned, then
without an additional trigger, no guest NTP corrections can propagate
either, as the current trigger is only vcpu cpu migration.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Andrew Jones
2014-02-28 12:52:55 +01:00
committed by Paolo Bonzini
parent 7e44e4495a
commit 332967a3ea
2 changed files with 21 additions and 0 deletions
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arch/x86/include/asm/kvm_host.h
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@@ -599,6 +599,7 @@ struct kvm_arch {
u64 master_kernel_ns;
cycle_t master_cycle_now;
struct delayed_work kvmclock_update_work;
struct delayed_work kvmclock_sync_work;
struct kvm_xen_hvm_config xen_hvm_config;