* Re: [PATCH v5 1/3] KVM: x86: Provide per VM capability for disabling PMU virtualization [not found] ` <CALMp9eSuavLEJ0_jwuOgmSX+Y8iJLsJT0xkGfMZg6B7kGyDmBQ@mail.gmail.com> @ 2022-02-09 10:33 ` Like Xu 2022-02-09 17:30 ` David Dunn 0 siblings, 1 reply; 2+ messages in thread From: Like Xu @ 2022-02-09 10:33 UTC (permalink / raw) To: Paolo Bonzini - Distinguished Engineer (kernel-recipes.org) (KVM HoF) Cc: kvm, seanjc, David Dunn, Jim Mattson, Vitaly Kuznetsov, Wanpeng Li, Joerg Roedel, linux-kernel cc LKML and full list of KVM reviewers. On 25/1/2022 2:39 am, Jim Mattson wrote: > On Sun, Jan 23, 2022 at 10:45 AM David Dunn <daviddunn@google.com> wrote: >> >> KVM_CAP_PMU_DISABLE is used to disable PMU virtualization on individual >> x86 VMs. PMU configuration must be done prior to creating VCPUs. >> >> To enable future extension, KVM_CAP_PMU_CAPABILITY reports available >> settings via bitmask when queried via check_extension. >> >> For VMs that have PMU virtualization disabled, usermode will need to >> clear CPUID leaf 0xA to notify guests. >> >> Signed-off-by: David Dunn <daviddunn@google.com> > > Nit: The two references to CPUID leaf 0xA should be qualified as > applying only to Intel VMs. > > Reviewed-by: Jim Mattson <jmattson@google.com> > Nit: It looks like we already have "#define KVM_CAP_SYS_ATTRIBUTES 209". Hope it helps a little: Reviewed-by: Like Xu <likexu@tencent.com> ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH v5 1/3] KVM: x86: Provide per VM capability for disabling PMU virtualization 2022-02-09 10:33 ` [PATCH v5 1/3] KVM: x86: Provide per VM capability for disabling PMU virtualization Like Xu @ 2022-02-09 17:30 ` David Dunn 0 siblings, 0 replies; 2+ messages in thread From: David Dunn @ 2022-02-09 17:30 UTC (permalink / raw) To: Like Xu Cc: Paolo Bonzini - Distinguished Engineer (kernel-recipes.org) (KVM HoF), kvm, seanjc, Jim Mattson, Vitaly Kuznetsov, Wanpeng Li, Joerg Roedel, linux-kernel Thanks Like. I just sent a new v6 series with these minor merge conflicts resolved. Dave On Wed, Feb 9, 2022 at 2:33 AM Like Xu <like.xu.linux@gmail.com> wrote: > > cc LKML and full list of KVM reviewers. > > On 25/1/2022 2:39 am, Jim Mattson wrote: > > On Sun, Jan 23, 2022 at 10:45 AM David Dunn <daviddunn@google.com> wrote: > >> > >> KVM_CAP_PMU_DISABLE is used to disable PMU virtualization on individual > >> x86 VMs. PMU configuration must be done prior to creating VCPUs. > >> > >> To enable future extension, KVM_CAP_PMU_CAPABILITY reports available > >> settings via bitmask when queried via check_extension. > >> > >> For VMs that have PMU virtualization disabled, usermode will need to > >> clear CPUID leaf 0xA to notify guests. > >> > >> Signed-off-by: David Dunn <daviddunn@google.com> > > > > Nit: The two references to CPUID leaf 0xA should be qualified as > > applying only to Intel VMs. > > > > Reviewed-by: Jim Mattson <jmattson@google.com> > > > > Nit: It looks like we already have "#define KVM_CAP_SYS_ATTRIBUTES 209". > > Hope it helps a little: > > Reviewed-by: Like Xu <likexu@tencent.com> ^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-02-09 10:33 ` [PATCH v5 1/3] KVM: x86: Provide per VM capability for disabling PMU virtualization Like Xu
2022-02-09 17:30 ` David Dunn
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