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From: James Hogan <james.hogan@imgtec.com>
To: qemu-devel@nongnu.org, "Michael S. Tsirkin" <mst@redhat.com>,
	Marcel Apfelbaum <marcel@redhat.com>,
	Jason Wang <jasowang@redhat.com>,
	virtualization@lists.linux-foundation.org
Subject: [Qemu-devel] [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
Date: Fri, 17 Mar 2017 21:57:25 +0000	[thread overview]
Message-ID: <20170317215725.GJ996@jhogan-linux.le.imgtec.org> (raw)

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Hi,

I've bisected the following failure of the virtio_net linux v4.10 driver
to probe in QEMU v2.9.0-rc1 emulating a MIPS Malta machine:

virtio_net virtio0: virtio: device uses modern interface but does not have VIRTIO_F_VERSION_1
virtio_net: probe of virtio0 failed with error -22

To QEMU commit 9a4c0e220d8a ("hw/virtio-pci: fix virtio behaviour").

It appears that adding ",disable-modern=on,disable-legacy=off" to the
virtio-net -device makes it work again.

I presume this should really just work out of the box. Any ideas why it
isn't?

Cheers
James

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WARNING: multiple messages have this Message-ID (diff)
From: James Hogan <james.hogan@imgtec.com>
To: qemu-devel@nongnu.org, "Michael S. Tsirkin" <mst@redhat.com>,
	Marcel Apfelbaum <marcel@redhat.com>,
	Jason Wang <jasowang@redhat.com>,
	virtualization@lists.linux-foundation.org
Subject: [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
Date: Fri, 17 Mar 2017 21:57:25 +0000	[thread overview]
Message-ID: <20170317215725.GJ996@jhogan-linux.le.imgtec.org> (raw)


[-- Attachment #1.1: Type: text/plain, Size: 559 bytes --]

Hi,

I've bisected the following failure of the virtio_net linux v4.10 driver
to probe in QEMU v2.9.0-rc1 emulating a MIPS Malta machine:

virtio_net virtio0: virtio: device uses modern interface but does not have VIRTIO_F_VERSION_1
virtio_net: probe of virtio0 failed with error -22

To QEMU commit 9a4c0e220d8a ("hw/virtio-pci: fix virtio behaviour").

It appears that adding ",disable-modern=on,disable-legacy=off" to the
virtio-net -device makes it work again.

I presume this should really just work out of the box. Any ideas why it
isn't?

Cheers
James

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[-- Type: application/pgp-signature, Size: 801 bytes --]

[-- Attachment #2: Type: text/plain, Size: 183 bytes --]

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             reply	other threads:[~2017-03-17 21:57 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-17 21:57 James Hogan [this message]
2017-03-17 21:57 ` [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour' James Hogan
2017-03-20 15:21 ` [Qemu-devel] " Marcel Apfelbaum
2017-03-20 15:21   ` Marcel Apfelbaum
2017-03-20 15:43   ` [Qemu-devel] " Michael S. Tsirkin
2017-03-20 15:43     ` Michael S. Tsirkin
2017-03-20 16:02     ` [Qemu-devel] " Marcel Apfelbaum
2017-03-20 16:02       ` Marcel Apfelbaum
2017-03-21 14:16     ` [Qemu-devel] " Marcel Apfelbaum
2017-03-21 14:16       ` Marcel Apfelbaum
2017-03-27 18:45       ` [Qemu-devel] " James Hogan
2017-03-27 18:45         ` James Hogan

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