From: David Gibson <david@gibson.dropbear.id.au>
To: Greg Kurz <groug@kaod.org>
Cc: qemu-ppc@nongnu.org, "Cédric Le Goater" <clg@kaod.org>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH for-4.1 0/2] spapr/xics: Last minute fixes
Date: Thu, 25 Jul 2019 13:38:53 +1000 [thread overview]
Message-ID: <20190725033853.GE28601@umbus> (raw)
In-Reply-To: <156398742921.546975.8822387598242513827.stgit@bahia.lan>
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On Wed, Jul 24, 2019 at 06:57:09PM +0200, Greg Kurz wrote:
> KVM on POWER9 doesn't use the XIVE VP space optimally. This currently
> limits the number of VMs we can start to 127. Starting with the 128th
> one, KVM fails to create the XIVE or the XICS-on-XIVE device and we
> go through the fallback paths in QEMU.
>
> The XICS error path still has an issue that prevents the guest to do
> interrupts, even after QEMU fell back on XICS emulation. This is
> fixed with patch 2.
>
> Patch 1 is just a _trivial_ improvement of the warning that gets
> emited when falling back to emulated IC. Feel free to apply it to
> 4.2 or even to drop it if you don't want it in 4.1.
Applied to ppc-for-4.1. Finding a time to do a PR will be
interesting, but I'll see what I can do
--
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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prev parent reply other threads:[~2019-07-26 7:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-24 16:57 [Qemu-devel] [PATCH for-4.1 0/2] spapr/xics: Last minute fixes Greg Kurz
2019-07-24 16:57 ` [Qemu-devel] [PATCH for-4.1 1/2] spapr/irq: Inform the user when falling back to emulated IC Greg Kurz
2019-07-24 17:07 ` Cédric Le Goater
2019-07-24 16:57 ` [Qemu-devel] [PATCH for-4.1 2/2] xics/kvm: Fix fallback to emulated XICS Greg Kurz
2019-07-24 17:17 ` Cédric Le Goater
2019-07-25 3:38 ` David Gibson [this message]
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