linux-kernel - Re: [PATCHv2 00/11] KVM implementation of PAPR HPT resizing extension

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Message-ID: <20170201045636.GT30639@umbus.fritz.box>
Date:   Wed, 1 Feb 2017 15:56:36 +1100
From:   David Gibson <david@...son.dropbear.id.au>
To:     Paul Mackerras <paulus@...abs.org>
Cc:     sjitindarsingh@...il.com, benh@...nel.crashing.org,
        thuth@...hat.com, lvivier@...hat.com,
        linuxppc-dev@...ts.ozlabs.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2 00/11] KVM implementation of PAPR HPT resizing extension

On Wed, Feb 01, 2017 at 09:18:13AM +1100, Paul Mackerras wrote:
> On Tue, Dec 20, 2016 at 04:48:56PM +1100, David Gibson wrote:
> > Here is the KVM implementation for the proposed PAPR extension which
> > allows the runtime resizing of a PAPR guest's Hashed Page Table (HPT).
> > 
> > Using this requires a guest kernel with support for the extension.
> > Patches for guest side support in Linux were posted earlier:
> >   https://lists.ozlabs.org/pipermail/linuxppc-dev/2016-December/152164.html
> > 
> > It also requires userspace (i.e. qemu) to intercept the HPT resizing
> > hypercalls and invoke the KVM ioctl()s to implement them.  This is
> > done instead of having KVM direclty intercept the hypercalls, so that
> > userspace can, if useful, impose additional restrictions on resizes:
> > for example it could refuse them entirely if policy for the VM
> > precludes resizing, or it could limit the size of HPT the guest can
> > request to meet resource limits.
> > 
> > Patches to implement the userspace part of HPT resizing are proposed
> > for qemu-2.9, and can be found at:
> >   https://github.com/dgibson/qemu/tree/hpt-resize
> > 
> > I'm posting these now, in the hopes that both these and the
> > corresponding guest side patches can be staged and merged for the 4.11
> > window.
> 
> Thanks, series applied to my kvm-ppc-next branch.

Great.  Where can I grab that tree?

> Next time, please cc kvm-ppc@...r.kernel.org so I shows up in
> patchwork and I don't miss it.

Sorry, I hadn't realized that list existed.  Noted for future
reference.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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