From: Stefan Fritsch <sf@sfritsch.de>
To: "Michael S. Tsirkin" <mst@redhat.com>, Amos Kong <akong@redhat.com>
Cc: virtualization@lists.linux-foundation.org, rusty@rustcorp.com.au,
kvm@vger.kernel.org, jasowang@redhat.com
Subject: Re: [PATCH RFC] virtio-pci: share config interrupt between virtio devices
Date: Thu, 18 Sep 2014 21:18:37 +0200 [thread overview]
Message-ID: <11860049.kd4R4PIiz4@k> (raw)
In-Reply-To: <20140901063730.GB20186@redhat.com>
On Monday 01 September 2014 09:37:30, Michael S. Tsirkin wrote:
> Why do we need INT#x?
> How about setting IRQF_SHARED for the config interrupt
> while using MSI-X? You'd have to read ISR to check that the
> interrupt was intended for your device.
The virtio 0.9.5 spec says that ISR is "unused" when in MSI-X mode. I
don't think that you can depend on the device to set the configuration
changed bit.
The virtio 1.0 spec seems to have fixed that.
next prev parent reply other threads:[~2014-09-18 19:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-01 5:41 [PATCH RFC] virtio-pci: share config interrupt between virtio devices Amos Kong
2014-09-01 6:37 ` Michael S. Tsirkin
2014-09-01 7:58 ` Amos Kong
2014-09-01 8:12 ` Michael S. Tsirkin
2014-09-18 19:18 ` Stefan Fritsch [this message]
2014-09-21 8:09 ` Michael S. Tsirkin
2014-09-21 9:36 ` Stefan Fritsch
2014-09-21 10:21 ` Michael S. Tsirkin
2014-09-23 20:47 ` Stefan Fritsch
2014-09-21 13:47 ` Sasha Levin
2014-09-21 15:02 ` Michael S. Tsirkin
2014-09-21 15:19 ` Sasha Levin
2014-09-21 17:53 ` Michael S. Tsirkin
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