From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: linux-kernel@vger.kernel.org,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
xen-devel@lists.xensource.com,
Konrad Rzeszutek Wilk <konrad@kernel.org>,
Ian Campbell <Ian.Campbell@citrix.com>
Subject: Re: [PATCH] Fix when booting Xen+Linux under QEMU.
Date: Thu, 9 Dec 2010 22:55:00 -0500 [thread overview]
Message-ID: <20101210035500.GA17525@dumpdata.com> (raw)
In-Reply-To: <4D01462A.4010808@goop.org>
> I think I'd prefer to:
>
> 1. move to using all dynamic irqs, and use the core kernel irq
> allocator (ie, resurrect IanC's patches)
That would make it easier, except that they don't work when you have DomU
guest with Xen PCI front. Simply b/c the DomU guest has no idea of what GSI of
the host machine is. Hence the find_unbound_irq that starts from the top
(nr_irqs) and goes down to GSI count (nr_irq_gsi).
Maybe we can stick it in the Xen PCIfronted/Xen PCI backend a mechanism (some
key value) which will specify the host's nr_irq_gsi value. Then the DomU guest
can set that and then use the core kernel irq allocator...
next prev parent reply other threads:[~2010-12-10 3:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-09 21:01 [PATCH] Fix when booting Xen+Linux under QEMU Konrad Rzeszutek Wilk
2010-12-09 21:01 ` [PATCH 1/2] xen/irq: Cleanup the find_unbound_irq Konrad Rzeszutek Wilk
2010-12-09 21:01 ` [PATCH 2/2] xen/irq: Don't fall over when nr_irqs_gsi > nr_irqs Konrad Rzeszutek Wilk
2010-12-09 21:12 ` [PATCH] Fix when booting Xen+Linux under QEMU Jeremy Fitzhardinge
2010-12-10 3:55 ` Konrad Rzeszutek Wilk [this message]
2010-12-10 13:02 ` Stefano Stabellini
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