From: Avi Kivity <avi@redhat.com>
To: Alex Williamson <alex.williamson@redhat.com>
Cc: mst@redhat.com, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, jan.kiszka@siemens.com
Subject: Re: [PATCH v2 6/6] kvm: Level IRQ de-assert for KVM_IRQFD
Date: Thu, 28 Jun 2012 15:59:26 +0300 [thread overview]
Message-ID: <4FEC552E.40409@redhat.com> (raw)
In-Reply-To: <20120627051013.23698.91132.stgit@bling.home>
On 06/27/2012 08:10 AM, Alex Williamson wrote:
> This is an alternate level irqfd de-assert mode that's potentially
> useful for emulated drivers. It's included here to show how easy it
> is to implement with the new level irqfd and eoifd support. It's
> possible this mode might also prove interesting for device-assignment
> where we inject via level irqfd, receive an EOI (w/o de-assert), and
> use the level de-assert irqfd here.
This use case is racy. The guest driver will have shut down the
interrupt before EOI, but with what you describe, it will fire again
until the eoifd/deassertfd sequence completes.
An emulated device will see the guest driver shutting down the interrupt
so it's not a problem there.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2012-06-28 12:59 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-27 5:08 [PATCH v2 0/6] kvm: level triggered irqfd support Alex Williamson
2012-06-27 5:09 ` [PATCH v2 1/6] kvm: Pass kvm_irqfd to functions Alex Williamson
2012-06-27 9:35 ` Michael S. Tsirkin
2012-06-27 14:30 ` Alex Williamson
2012-06-27 14:24 ` Cornelia Huck
2012-06-28 8:38 ` Michael S. Tsirkin
2012-06-28 9:03 ` Cornelia Huck
2012-06-28 9:34 ` Michael S. Tsirkin
2012-06-28 12:00 ` Cornelia Huck
2012-06-28 12:09 ` Michael S. Tsirkin
2012-06-28 16:51 ` Cornelia Huck
2012-06-28 16:56 ` Michael S. Tsirkin
2012-06-29 15:14 ` Alex Williamson
2012-06-27 5:09 ` [PATCH v2 2/6] kvm: Add missing KVM_IRQFD API documentation Alex Williamson
2012-06-27 9:53 ` Michael S. Tsirkin
2012-06-27 5:09 ` [PATCH v2 3/6] kvm: Sanitize KVM_IRQFD flags Alex Williamson
2012-06-27 9:21 ` Michael S. Tsirkin
2012-06-27 20:12 ` Alex Williamson
2012-06-27 20:22 ` Michael S. Tsirkin
2012-06-28 12:35 ` Avi Kivity
2012-06-27 5:09 ` [PATCH v2 4/6] kvm: Extend irqfd to support level interrupts Alex Williamson
2012-06-27 9:34 ` Michael S. Tsirkin
2012-06-27 21:19 ` Alex Williamson
2012-06-28 12:41 ` Avi Kivity
2012-06-27 9:51 ` Michael S. Tsirkin
2012-06-27 20:59 ` Alex Williamson
2012-06-27 21:14 ` Michael S. Tsirkin
2012-06-27 21:28 ` Alex Williamson
2012-06-27 22:28 ` Michael S. Tsirkin
2012-06-28 3:52 ` Alex Williamson
2012-06-28 8:29 ` Michael S. Tsirkin
2012-06-29 15:13 ` Alex Williamson
2012-06-27 15:26 ` Michael S. Tsirkin
2012-06-27 22:04 ` Alex Williamson
2012-06-27 22:31 ` Michael S. Tsirkin
2012-06-28 6:34 ` Gleb Natapov
2012-06-28 8:34 ` Michael S. Tsirkin
2012-06-28 8:35 ` Gleb Natapov
2012-06-28 8:41 ` Michael S. Tsirkin
2012-06-28 8:46 ` Gleb Natapov
2012-06-28 8:48 ` Michael S. Tsirkin
2012-06-28 8:53 ` Gleb Natapov
2012-06-29 22:27 ` Alex Williamson
2012-07-01 7:34 ` Gleb Natapov
2012-06-27 5:10 ` [PATCH v2 5/6] kvm: KVM_EOIFD, an eventfd for EOIs Alex Williamson
2012-06-27 9:49 ` Michael S. Tsirkin
2012-06-27 13:58 ` Gleb Natapov
2012-06-27 14:29 ` Alex Williamson
2012-06-27 14:51 ` Gleb Natapov
2012-06-28 3:55 ` Alex Williamson
2012-06-28 13:11 ` Michael S. Tsirkin
2012-06-28 14:08 ` Gleb Natapov
2012-06-28 16:55 ` Michael S. Tsirkin
2012-06-27 15:20 ` Michael S. Tsirkin
2012-06-28 19:29 ` Michael S. Tsirkin
2012-06-29 15:09 ` Alex Williamson
2012-06-29 15:12 ` Alex Williamson
2012-06-27 5:10 ` [PATCH v2 6/6] kvm: Level IRQ de-assert for KVM_IRQFD Alex Williamson
2012-06-28 12:59 ` Avi Kivity [this message]
2012-06-29 15:39 ` Alex Williamson
2012-06-27 9:15 ` [PATCH v2 0/6] kvm: level triggered irqfd support Michael S. Tsirkin
2012-06-27 9:58 ` Michael S. Tsirkin
2012-06-27 14:33 ` Alex Williamson
2012-06-28 8:42 ` Michael S. Tsirkin
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