From: Haozhong Zhang <[email protected]> This patch makes kvm-intel module to load TSC scaling ratio into TSC multiplier field of VMCS when a vcpu is loaded, so that TSC scaling ratio can take effect if VMX TSC scaling is enabled.
Signed-off-by: Haozhong Zhang <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]> (cherry-picked from commit ff2c3a1803775cc72dc6f624b59554956396b0ee) Signed-off-by: Denis Plotnikov <[email protected]> Signed-off-by: Roman Kagan <[email protected]> --- arch/x86/kvm/vmx.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index ab8a678..265bc0e 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1883,6 +1883,12 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ + + /* Setup TSC multiplier */ + if (cpu_has_vmx_tsc_scaling()) + vmcs_write64(TSC_MULTIPLIER, + vcpu->arch.tsc_scaling_ratio); + vmx->loaded_vmcs->cpu = cpu; } } -- 2.7.4 _______________________________________________ Devel mailing list [email protected] https://lists.openvz.org/mailman/listinfo/devel
