[PATCHv2 00/11] KVM implementation of PAPR HPT resizing extension

David Gibson david at gibson.dropbear.id.au
Wed Feb 1 15:56:36 AEDT 2017

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 at vger.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

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_!
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