FYI, just for information sharing.|
KVM emulated x2apic feature no matter host supports it or not.
You can get the code from arch/x86/kvm/cpuid.c.
/* we support x2apic emulation even if host does not support
* it since we emulate x2apic in software */
entry->ecx |= F(X2APIC);
QEMU will get this feature through kvm_ioctl().
On 2013-07-24 8:48, Peter Huang(Peng) wrote:
Hi,Jiri Thanks for replying. So why VM identified different features from host is due to the hypervisor filtering. I will dig into the hypervisor of how it filter features, and update status later. Thanks again.