Re: [PATCH v8 13/14] KVM/x86/vPMU: check the lbr feature before entering guest

On 08/06/2019 03:16 PM, Wei Wang wrote: The guest can access the lbr related msrs only when the vcpu's lbr event has been assigned the lbr feature. A cpu pinned lbr event (though no such event usages in the current upstream kernel) could reclaim the lbr feature from the vcpu's lbr event (task

[PATCH v8 13/14] KVM/x86/vPMU: check the lbr feature before entering guest

The guest can access the lbr related msrs only when the vcpu's lbr event has been assigned the lbr feature. A cpu pinned lbr event (though no such event usages in the current upstream kernel) could reclaim the lbr feature from the vcpu's lbr event (task pinned) via ipi calls. If the cpu is running