Re: [PATCH 2/2] KVM: VMX: Ignore userspace MSR filters for x2APIC when APICV is enabled

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Subject: Re: [PATCH 2/2] KVM: VMX: Ignore userspace MSR filters for x2APIC when APICV is enabled
From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Date: Mon, 19 Oct 2020 18:32:06 +0200
Cc: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>, Wanpeng Li <wanpengli@xxxxxxxxxxx>, Jim Mattson <jmattson@xxxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, kvm@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Aaron Lewis <aaronlewis@xxxxxxxxxx>
In-reply-to: <20201007164431.GE6026@xz-x1>
References: <20201005195532.8674-1-sean.j.christopherson@intel.com> <20201005195532.8674-3-sean.j.christopherson@intel.com> <bcb15eb1-8d3e-ff6d-d11f-667884584f1f@amazon.com> <20201007164431.GE6026@xz-x1>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.3.1

On 07/10/20 18:44, Peter Xu wrote:
> If we want to forbid apicv msrs, should we even fail KVM_X86_SET_MSR_FILTER
> directly then?

Yes, probably it should.  I'll send a patch shortly.

Paolo

References:
- [PATCH 0/2] KVM: VMX: x2APIC + APICV MSR fix and cleanup
  - From: Sean Christopherson
- [PATCH 2/2] KVM: VMX: Ignore userspace MSR filters for x2APIC when APICV is enabled
  - From: Sean Christopherson
- Re: [PATCH 2/2] KVM: VMX: Ignore userspace MSR filters for x2APIC when APICV is enabled
  - From: Alexander Graf
- Re: [PATCH 2/2] KVM: VMX: Ignore userspace MSR filters for x2APIC when APICV is enabled
  - From: Peter Xu

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