linux-kernel - Re: [PATCH] kvm: x86: limit the maximum number of vPMU fixed counters to 3

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <9b50db05-759e-c95c-35b2-99fba50e6997@redhat.com>
Date:   Wed, 8 Jul 2020 13:09:22 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     like.xu@...el.com, Like Xu <like.xu@...ux.intel.com>,
        kvm@...r.kernel.org
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kvm: x86: limit the maximum number of vPMU fixed counters
 to 3

On 08/07/20 09:51, Xu, Like wrote:
> Kindly ping.
> 
> I think we may need this patch, as we limit the maximum vPMU version to 2:
>     eax.split.version_id = min(cap.version, 2);

I don't think this is a problem.  Are you planning to add support for
the fourth counter?

Paolo