Messages in this thread | | | Subject | Re: [PATCH] KVM: x86/pmu: Add '.exclude_hv = 1' for guest perf_event | From | "Xu, Like" <> | Date | Wed, 12 Aug 2020 21:14:16 +0800 |
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On 2020/8/12 21:04, Paolo Bonzini wrote: > On 12/08/20 14:56, Xu, Like wrote: >> My proposal is to define: >> the "hypervisor privilege levels" events in the KVM/x86 context as >> all the host kernel events plus /dev/kvm user space events. > What are "/dev/kvm user space events"? In any case, this patch should > be included only in the series that adds exclude_hv support in arch/x86. The exclude_kernel events from the QEMU or whoever else has opened /dev/kvm.
Do you see any (patches) gap if we map the exclude_host events into exclude_hv events naturally ?
Thanks, Like Xu > Paolo > >> If we add ".exclude_hv = 1" in the pmc_reprogram_counter(), >> do you see any side effect to cover the above usages? >> >> The fact that exclude_hv has never been used in x86 does help >> the generic perf code to handle permission checks in a more concise way.
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