Re: [PATCH v5] arm/kvm: Enable support for KVM_ARM_VCPU_PMU_V3_FILTER

[Sebastian Ott]

On Wed, 17 Jan 2024, Eric Auger wrote:
> On 1/15/24 09:01, Shaoqin Huang wrote:
> > +    /*
> > +     * The filter only needs to be initialized through one vcpu ioctl and it
> > +     * will affect all other vcpu in the vm.
> > +     */
> > +    if (pmu_filter_init) {
> I think I commented on that on the v4. Maybe I missed your reply. You
> sure you don't need to call it for each vcpu?

> From (kernel) commit d7eec2360e3 ("KVM: arm64: Add PMU event filtering
infrastructure"):
  Note that although the ioctl is per-vcpu, the map of allowed events is
  global to the VM (it can be setup from any vcpu until the vcpu PMU is
  initialized).

Sebastian