Re: [PATCH for-5.0 v5 00/23] ppc/pnv: add XIVE support for KVM guests

[David Gibson <david@gibson.dropbear.id.au>]

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On Fri, Nov 22, 2019 at 07:17:05PM +0100, Cédric Le Goater wrote:
> On 15/11/2019 17:24, Cédric Le Goater wrote:
> > Hello,
> > 
> > The QEMU PowerNV machine emulates a baremetal OpenPOWER system and
> > acts as an hypervisor (L0). Supporting emulation of KVM to run guests
> > (L1) requires a few more extensions, among which guest support for the
> > XIVE interrupt controller on POWER9 processor.
> > 
> > The following changes extend the XIVE models with the new XiveFabric
> > and XivePresenter interfaces to provide support for XIVE escalations
> > and interrupt resend. This mechanism is used by XIVE to notify the
> > hypervisor that a vCPU is not dispatched on a HW thread. Tested on a
> > QEMU PowerNV machine and a simple QEMU pseries guest doing network on
> > a local bridge.
> > 
> > The XIVE interrupt controller offers a way to increase the XIVE
> > resources per chip by configuring multiple XIVE blocks on a chip. This
> > is not currently supported by the model. However, some configurations,
> > such as OPAL/skiboot, use one block-per-chip configuration with some
> > optimizations. One of them is to override the hardwired chip ID by the
> > block id in the PowerBUS operations and for CAM line compares. This
> > patchset improves the support for this setup. Tested with 4 chips.
> > 
> > A series from Suraj adding guest support in the Radix MMU model of the
> > QEMU PowerNV machine is still required and will be send later. The
> > whole patchset can be found under :
> > 
> >   https://github.com/legoater/qemu/tree/powernv-4.2
> 
> 
>  [ ... ]
> 
> > Cédric Le Goater (23):
> >   ppc/xive: Record the IPB in the associated NVT
> >   ppc/xive: Introduce helpers for the NVT id
> >   ppc/pnv: Remove pnv_xive_vst_size() routine
> >   ppc/pnv: Dump the XIVE NVT table
> >   ppc/pnv: Quiesce some XIVE errors
> >   ppc/xive: Introduce OS CAM line helpers
> >   ppc/xive: Check V bit in TM_PULL_POOL_CTX
> >   ppc/xive: Introduce a XivePresenter interface
> >   ppc/xive: Implement the XivePresenter interface
> 
> David,
> 
> I have reworked the following patches to address Greg's comments 
> and your comment on "ppc/pnv: Dump the XIVE NVT table". 
> 
> Shall I wait for some feedback from you or just resend ?

Just resend, thanks.

-- 
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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