linux-kernel - Re: [PATCH v13 06/12] KVM: x86: Add Intel PT virtualization work mode

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Message-ID: <ad7452a3-61d7-1276-e0a5-84e6696832a7@redhat.com>
Date:   Tue, 30 Oct 2018 10:49:15 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        "Kang, Luwei" <luwei.kang@...el.com>
Cc:     Jim Mattson <jmattson@...gle.com>, kvm list <kvm@...r.kernel.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Joerg Roedel <joro@...tes.org>,
        "songliubraving@...com" <songliubraving@...com>,
        Peter Zijlstra <peterz@...radead.org>,
        "alexander.shishkin@...ux.intel.com" 
        <alexander.shishkin@...ux.intel.com>,
        "kstewart@...uxfoundation.org" <kstewart@...uxfoundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Tom Lendacky <thomas.lendacky@....com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        "mattst88@...il.com" <mattst88@...il.com>,
        Janakarajan Natarajan <Janakarajan.Natarajan@....com>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Marc Orr <marcorr@...gle.com>, Uros Bizjak <ubizjak@...il.com>,
        "Christopherson, Sean J" <sean.j.christopherson@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Chao Peng <chao.p.peng@...ux.intel.com>
Subject: Re: [PATCH v13 06/12] KVM: x86: Add Intel PT virtualization work mode

On 30/10/2018 10:30, Thomas Gleixner wrote:
>> This part is in the " Intel® Architecture Instruction Set Extensions and Future Features Programming Reference"
>> https://software.intel.com/sites/default/files/managed/c5/15/architecture-instruction-set-extensions-programming-reference.pdf
>>
> Yet another PDF which will change it's location sooner than later. Can you
> please stick that into the kernel.org bugzilla and reference the BZ in the
> change log, so we have something for posterity?

Hopefully posterity will be able to read it in the SDM.  But I agree
it's a good idea to add it in the commit log.  Let's also wait for
Alexander to clarify what he thinks needs to be done.

Paolo