linux-kernel - Re: [PATCH v3 4/7] KVM: x86: nSVM: support PAUSE filter threshold and count when cpu

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: <b81c095a-30b2-95c6-1b5f-dfa102f5790a@redhat.com>
Date:   Tue, 22 Mar 2022 11:12:51 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Jim Mattson <jmattson@...gle.com>,
        Maxim Levitsky <mlevitsk@...hat.com>
Cc:     kvm@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Joerg Roedel <joro@...tes.org>, linux-kernel@...r.kernel.org,
        Wanpeng Li <wanpengli@...cent.com>
Subject: Re: [PATCH v3 4/7] KVM: x86: nSVM: support PAUSE filter threshold and
 count when cpu_pm=on

On 3/21/22 23:41, Jim Mattson wrote:
>> 100%. Do you have a pointer where to document it?
> I think this will be the first KVM virtual CPU erratum documented,
> though there are plenty of others that I'd like to see documented
> (e.g. nVMX processes posted interrupts on emulated VM-entry, AMD's
> merged PMU counters are only 48 bits wide, etc.).
> 
> Maybe Paolo has some ideas?

So let's document them, that's a great idea.  I can help writing them 
down if you have a pointer to prior email discussions.  I'll send a 
skeleton.

Paolo