diff options
Diffstat (limited to 'xen/arch/x86/hvm/vpt.c')
| -rw-r--r-- | xen/arch/x86/hvm/vpt.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/xen/arch/x86/hvm/vpt.c b/xen/arch/x86/hvm/vpt.c index 7056769ea3..52fb086876 100644 --- a/xen/arch/x86/hvm/vpt.c +++ b/xen/arch/x86/hvm/vpt.c @@ -56,7 +56,19 @@ u64 hvm_get_guest_time(struct vcpu *v) void hvm_set_guest_time(struct vcpu *v, u64 guest_time) { - v->arch.hvm_vcpu.stime_offset += guest_time - hvm_get_guest_time(v); + u64 offset = guest_time - hvm_get_guest_time(v); + + if ( offset ) + { + v->arch.hvm_vcpu.stime_offset += offset; + /* + * If hvm_vcpu.stime_offset is updated make sure to + * also update vcpu time, since this value is used to + * calculate the TSC. + */ + if ( v == current ) + update_vcpu_system_time(v); + } } static int pt_irq_vector(struct periodic_time *pt, enum hvm_intsrc src) |