From: Christian Borntraeger <borntraeger@de.ibm.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>,
virtualization@lists.linux-foundation.org,
Anthony Liguori <anthony@codemonkey.ws>,
kvm@vger.kernel.org, avi@redhat.com
Subject: Re: [PATCH RFC 0/8] virtio: add guest MSI-X support
Date: Mon, 27 Apr 2009 16:00:30 +0200 [thread overview]
Message-ID: <200904271600.30599.borntraeger@de.ibm.com> (raw)
In-Reply-To: <20090427123136.GA1152@redhat.com>
Am Monday 27 April 2009 14:31:36 schrieb Michael S. Tsirkin:
> Add optional MSI-X support: use a vector per virtqueue with
> fallback to a common vector and finally to regular interrupt.
> Teach all drivers to use it.
>
> I added 2 new virtio operations: request_vqs/free_vqs because MSI
> needs to know the total number of vectors upfront.
>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
I dont know, if that is feasible for MSI, but the transport(virtio_pci) should
already know the number of virtqueues, which should match the number of
vectors, no?
In fact, the transport has to have a way of getting the number of virtqeues
because find_vq returns ENOENT on invalid index numbers.
Christian
next prev parent reply other threads:[~2009-04-27 14:00 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-27 12:31 [PATCH RFC 0/8] virtio: add guest MSI-X support Michael S. Tsirkin
2009-04-27 14:00 ` Christian Borntraeger [this message]
2009-04-27 14:32 ` Michael S. Tsirkin
2009-04-27 15:37 ` Christian Borntraeger
2009-04-27 17:17 ` Michael S. Tsirkin
2009-04-27 15:06 ` Avi Kivity
2009-04-27 15:39 ` Michael S. Tsirkin
2009-04-27 16:59 ` Christian Borntraeger
2009-04-27 17:19 ` Michael S. Tsirkin
2009-04-28 6:47 ` Avi Kivity
2009-04-28 17:41 ` Michael S. Tsirkin
2009-04-28 17:51 ` Avi Kivity
2009-04-28 18:02 ` Michael S. Tsirkin
2009-04-28 19:56 ` Anthony Liguori
2009-04-28 21:01 ` Michael S. Tsirkin
2009-05-04 9:21 ` Avi Kivity
2009-05-04 11:54 ` Michael S. Tsirkin
2009-05-04 11:57 ` Avi Kivity
2009-04-27 14:39 ` Anthony Liguori
2009-04-27 17:42 ` Michael S. Tsirkin
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