Initialize kvmclock base, on kvmclock system MSR write time, so that the guest sees kvmclock counting from zero. This matches baremetal behaviour when kvmclock in guest sets sched clock stable. Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx> --- arch/x86/kvm/x86.c | 5 +++++ 1 file changed, 5 insertions(+) Index: kvm/arch/x86/kvm/x86.c =================================================================== --- kvm.orig/arch/x86/kvm/x86.c 2015-05-27 17:40:46.948189811 -0300 +++ kvm/arch/x86/kvm/x86.c 2015-05-27 22:43:47.340413347 -0300 @@ -1703,6 +1703,8 @@ /* If the host uses TSC clocksource, then it is stable */ if (use_master_clock) pvclock_flags |= PVCLOCK_TSC_STABLE_BIT; + if (ka->kvmclk_counts_from_zero) + pvclock_flags |= PVCLOCK_COUNTS_FROM_ZERO; vcpu->hv_clock.flags = pvclock_flags; @@ -2282,6 +2284,9 @@ &vcpu->requests); ka->boot_vcpu_runs_old_kvmclock = tmp; + + ka->kvmclock_offset = -get_kernel_ns(); + ka->kvmclk_counts_from_zero = true; } vcpu->arch.time = data; -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
