To implement steal time, we need the hypervisor to pass the guest information about how much time was spent running other processes outside the VM. This is per-vcpu, and using the kvmclock structure for that is an abuse we decided not to make.
This patch contains the hypervisor part for it. I am keeping it separate from the headers to facilitate backports to people who wants to backport the kernel part but not the hypervisor, or the other way around. Signed-off-by: Glauber Costa <[email protected]> CC: Rik van Riel <[email protected]> CC: Jeremy Fitzhardinge <[email protected]> CC: Peter Zijlstra <[email protected]> CC: Avi Kivity <[email protected]> --- arch/x86/kvm/x86.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 81b2f34..f129ea1 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1564,6 +1564,11 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) goto rma_out; } + if (area_desc.type == KVM_AREA_STEAL_TIME) { + vcpu->arch.stime = area_desc.base; + goto rma_out; + } + if (vcpu->kvm->register_mem_area_uspace) { vcpu->run->exit_reason = KVM_EXIT_X86_MSR_OP; vcpu->run->msr.msr_data = data; -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
