Re: [PATCH] KVM: x86/pmu: Add '.exclude_hv = 1' for guest perf_event

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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.




[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux