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]> --- 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 ef19eb8..e282eb8 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1952,6 +1952,12 @@ 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; } } -- 2.4.8 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
