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 v11] kvm: Add resampling irqfds for level triggered interrupts
Date: Sun, 23 Sep 2012 13:50:28 +0200 [thread overview]
Message-ID: <505EF784.7060504@redhat.com> (raw)
In-Reply-To: <20120921175601.32604.63271.stgit@bling.home>
On 09/21/2012 08:58 PM, Alex Williamson wrote:
> To emulate level triggered interrupts, add a resample option to
> KVM_IRQFD. When specified, a new resamplefd is provided that notifies
> the user when the irqchip has been resampled by the VM. This may, for
> instance, indicate an EOI. Also in this mode, posting of an interrupt
> through an irqfd only asserts the interrupt. On resampling, the
> interrupt is automatically de-asserted prior to user notification.
> This enables level triggered interrupts to be posted and re-enabled
> from vfio with no userspace intervention.
>
> All resampling irqfds can make use of a single irq source ID, so we
> reserve a new one for this interface.
>
Thanks, applied.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
prev parent reply other threads:[~2012-09-23 11:50 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-21 17:58 [PATCH v11] kvm: Add resampling irqfds for level triggered interrupts Alex Williamson
2012-09-23 11:50 ` Avi Kivity [this message]
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