linux-kernel - Re: [PATCH v2 00/12] KVM/X86: Introduce a new guest mapping interface

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: <1523880592.22952.9.camel@amazon.de>
Date:   Mon, 16 Apr 2018 12:09:53 +0000
From:   "Raslan, KarimAllah" <karahmed@...zon.de>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "rkrcmar@...hat.com" <rkrcmar@...hat.com>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "david@...hat.com" <david@...hat.com>
Subject: Re: [PATCH v2 00/12] KVM/X86: Introduce a new guest mapping interface

On Mon, 2018-04-16 at 13:10 +0200, Paolo Bonzini wrote:
> On 15/04/2018 23:53, KarimAllah Ahmed wrote:
> > 
> > Guest memory can either be directly managed by the kernel (i.e. have a "struct
> > page") or they can simply live outside kernel control (i.e. do not have a
> > "struct page"). KVM mostly support these two modes, except in a few places
> > where the code seems to assume that guest memory must have a "struct page".
> > 
> > This patchset introduces a new mapping interface to map guest memory into host
> > kernel memory which also supports PFN-based memory (i.e. memory without 'struct
> > page'). It also converts all offending code to this interface or simply
> > read/write directly from guest memory.
> > 
> > As far as I can see all offending code is now fixed except the APIC-access page
> > which I will handle in a seperate patch.
> 
> I assume the caching will also be a separate patch.

Yup, do you want me to include it in this one? I already have it, I
just thought that I get those bits out first.

> 
> It looks good except that I'd squash patches 4 and 9 together.

Yup, makes sense. I should have squashed them when I removed the 
lifecycle change!

Thanks for the review :)

> But I'd like a second set of eyes to look at it.
> 
> Thanks,
> 
> Paolo
> 
Amazon Development Center Germany GmbH
Berlin - Dresden - Aachen
main office: Krausenstr. 38, 10117 Berlin
Geschaeftsfuehrer: Dr. Ralf Herbrich, Christian Schlaeger
Ust-ID: DE289237879
Eingetragen am Amtsgericht Charlottenburg HRB 149173 B