Il 31/07/2014 10:03, Wanpeng Li ha scritto: >> One thing: >> >>> + if (nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) >>> + vmcs_write32(TPR_THRESHOLD, vmcs12->tpr_threshold); >> >> I think you can just do this write unconditionally, since most >> hypervisors will enable this. Also, you probably can add the tpr > > What will happen if a hypervisor doesn't enable it? I make it more > cleaner in version two.
TPR_THRESHOLD will be likely written as zero, but the processor will never use it anyway. It's just a small optimization because nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW) will almost always be true. Paolo >> threshold field to the read-write fields for shadow VMCS. > > Agreed. > > Regards, > Wanpeng Li -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
