From: Avi Kivity <avi@redhat.com>
To: Alex Williamson <alex.williamson@redhat.com>
Cc: mst@redhat.com, gleb@redhat.com, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v9 1/2] kvm: Use a reserved IRQ source ID for irqfd
Date: Wed, 05 Sep 2012 17:46:17 +0300 [thread overview]
Message-ID: <504765B9.7010406@redhat.com> (raw)
In-Reply-To: <20120821192903.24958.90138.stgit@bling.home>
On 08/21/2012 10:29 PM, Alex Williamson wrote:
> KVM_IRQFD currently uses the reserved KVM_USERSPACE_IRQ_SOURCE_ID
> which is also shared with userspace injection methods like
> KVM_IRQ_LINE. This can cause a conflict if an irqfd triggers on
> a GSI asserted through KVM_IRQ_LINE. Move irqfd to it's own
> reserved IRQ source ID. Add a capability for userspace to test
> for this fix.
I don't think we need a cap, rather a backport if we identify real cases
where an edge gsi is shared among several devices. Otherwise it is just
a theoretical bug before level irqfd is introduced.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2012-09-05 14:46 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-21 19:28 [PATCH v9 0/2] kvm: level irqfd support Alex Williamson
2012-08-21 19:29 ` [PATCH v9 1/2] kvm: Use a reserved IRQ source ID for irqfd Alex Williamson
2012-08-21 19:58 ` Michael S. Tsirkin
2012-08-21 20:06 ` Alex Williamson
2012-08-21 20:41 ` Michael S. Tsirkin
2012-08-21 21:14 ` Alex Williamson
2012-08-22 0:41 ` Michael S. Tsirkin
2012-08-22 1:34 ` Alex Williamson
2012-09-05 14:35 ` Avi Kivity
2012-09-05 14:51 ` Michael S. Tsirkin
2012-09-05 14:59 ` Avi Kivity
2012-09-05 15:13 ` Michael S. Tsirkin
2012-09-05 15:22 ` Avi Kivity
2012-09-05 15:28 ` Michael S. Tsirkin
2012-09-05 15:35 ` Avi Kivity
2012-09-05 15:09 ` Michael S. Tsirkin
2012-09-05 15:12 ` Avi Kivity
2012-09-05 15:15 ` Michael S. Tsirkin
2012-09-05 14:46 ` Avi Kivity [this message]
2012-09-05 15:07 ` Michael S. Tsirkin
2012-09-05 15:15 ` Avi Kivity
2012-08-21 19:29 ` [PATCH v9 2/2] kvm: On Ack, De-assert & Notify KVM_IRQFD extension Alex Williamson
2012-08-21 20:37 ` Michael S. Tsirkin
2012-08-21 21:11 ` Alex Williamson
2012-08-22 0:14 ` Michael S. Tsirkin
2012-08-22 1:48 ` Alex Williamson
2012-09-05 14:57 ` Avi Kivity
2012-09-17 16:13 ` Alex Williamson
2012-08-22 0:31 ` [PATCH v9 0/2] kvm: level irqfd support Michael S. Tsirkin
2012-08-22 1:28 ` Alex Williamson
2012-08-22 8:25 ` Michael S. Tsirkin
2012-09-17 18:08 ` Alex Williamson
2012-08-22 10:10 ` Michael S. Tsirkin
2012-09-05 14:42 ` Avi Kivity
2012-09-05 14:52 ` Michael S. Tsirkin
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