On 06/07/2016 07:37, Wanpeng Li wrote: > Cc Jan, > 2016-07-06 13:10 GMT+08:00 Haozhong Zhang <haozhong.zh...@intel.com>: >> A different VMCS is loaded when L2 guest is running, so it's incorrect >> to use the VMX preemption timer for L1 TSC deadline timer. This patch >> switches to hrtimer for L1 TSC deadline timer when entering L2 guest, >> and switches back to VMX preemption timer when nested VMEXIT from L2 to >> L1. > > Nested preemption timer is emulated by hrtimer, so it doesn't > influence vmcs02, why this is needed?
I agree (and nested APIC timer is emulated by L1). Because the L1 APIC timer is set in the preemption timer before vmentry, this should not be necessary. Paolo
