From: Paul Mackerras <paulus@ozlabs.org>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: sjitindarsingh@gmail.com, benh@kernel.crashing.org,
thuth@redhat.com, lvivier@redhat.com,
linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCHv2 00/11] KVM implementation of PAPR HPT resizing extension
Date: Wed, 1 Feb 2017 09:18:13 +1100 [thread overview]
Message-ID: <20170131221813.GA3305@fergus.ozlabs.ibm.com> (raw)
In-Reply-To: <20161220054907.9204-1-david@gibson.dropbear.id.au>
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.
Next time, please cc kvm-ppc@vger.kernel.org so I shows up in
patchwork and I don't miss it.
Paul.
next prev parent reply other threads:[~2017-01-31 22:18 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-20 5:48 [PATCHv2 00/11] KVM implementation of PAPR HPT resizing extension David Gibson
2016-12-20 5:48 ` [PATCHv2 01/11] Documentation: Correct duplicate section number in kvm/api.txt David Gibson
2016-12-20 5:48 ` David Gibson
2016-12-20 5:48 ` [PATCHv2 02/11] powerpc/kvm: HPT resizing documentation and reserved numbers David Gibson
2016-12-20 5:48 ` [PATCHv2 03/11] powerpc/kvm: Rename kvm_alloc_hpt() for clarity David Gibson
2016-12-20 5:49 ` [PATCHv2 04/11] powerpc/kvm: Gather HPT related variables into sub-structure David Gibson
2016-12-20 5:49 ` [PATCHv2 05/11] powerpc/kvm: Don't store values derivable from HPT order David Gibson
2016-12-20 5:49 ` [PATCHv2 06/11] powerpc/kvm: Split HPT allocation from activation David Gibson
2016-12-20 5:49 ` [PATCHv2 07/11] powerpc/kvm: Allow KVM_PPC_ALLOCATE_HTAB ioctl() to change HPT size David Gibson
2016-12-20 5:49 ` [PATCHv2 08/11] powerpc/kvm: Create kvmppc_unmap_hpte_helper() David Gibson
2016-12-20 5:49 ` [PATCHv2 09/11] powerpc/kvm: Outline of KVM-HV HPT resizing implementation David Gibson
2016-12-20 5:49 ` [PATCHv2 10/11] powerpc/kvm: " David Gibson
2016-12-20 5:49 ` [PATCHv2 11/11] powerpc/kvm: Advertise availablity of HPT resizing on KVM HV David Gibson
2017-01-31 22:18 ` Paul Mackerras [this message]
2017-02-01 4:56 ` [PATCHv2 00/11] KVM implementation of PAPR HPT resizing extension David Gibson
2017-02-01 5:07 ` Paul Mackerras
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