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Date:      Sun, 12 Jan 2020 20:51:24 +0000
From:      bugzilla-noreply@freebsd.org
To:        virtualization@FreeBSD.org
Subject:   [Bug 236922] Virtio fails as QEMU-KVM guest with Q35 chipset on Ubuntu 18.04.2 LTS
Message-ID:  <bug-236922-27103-K7QeAnZXGJ@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-236922-27103@https.bugs.freebsd.org/bugzilla/>
References:  <bug-236922-27103@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D236922

--- Comment #31 from Tommy P <tommyhp2@gmail.com> ---
Jan 12 02:11:23 fbsd12 kernel: vtpcil2: <VirtIO PCI (legacy) SCSI adapter> =
port
0xc180-0xc1bf mem 0xfc13b000-0xfc13bfff,0xfebf4000-0xfebf7fff irq 10 at dev=
ice
9.0 on pci0
Jan 12 02:11:23 fbsd12 kernel: vtscsi0: <VirtIO SCSI Adapter> on vtpcil2
Jan 12 02:11:23 fbsd12 kernel: vtpcil3: <VirtIO PCI (legacy) Block adapter>
port 0xc1c0-0xc1ff mem 0xfc13c000-0xfc13cfff,0xfebf8000-0xfebfbfff irq 10 at
device 10.0 on pci0
Jan 12 02:11:23 fbsd12 kernel: vtblk0: <VirtIO Block Adapter> on vtpcil3
Jan 12 02:11:23 fbsd12 kernel: vtpcil4: <VirtIO PCI (legacy) Network adapte=
r>
port 0xc260-0xc27f mem 0xfc13d000-0xfc13dfff,0xfebfc000-0xfebfffff irq 11 at
device 11.0 on pci0
Jan 12 02:11:23 fbsd12 kernel: vtnet0: <VirtIO Network Adapter> on vtpcil4
Jan 12 02:11:23 fbsd12 kernel: vtnet0: Ethernet address: 52:54:00:88:a5:32
Jan 12 02:11:23 fbsd12 kernel: 000.000854 [ 502] vtnet_netmap_attach       =
max
rings 1
Jan 12 02:11:23 fbsd12 kernel: vtnet0: netmap queues/slots: TX 1/1024, RX
1/1024
Jan 12 02:11:23 fbsd12 kernel: 000.000869 [ 507] vtnet_netmap_attach=20=20=
=20=20=20=20
virtio attached txq=3D1, txd=3D1024 rxq=3D1, rxd=3D1024
Jan 12 02:11:23 fbsd12 kernel: ada0: <QEMU HARDDISK 2.5+> ATA-7 SATA device
Jan 12 02:11:23 fbsd12 kernel: ada0: 150.000MB/s transfers (SATA 1.x, UDMA5,
PIO 8192bytes)
Jan 12 02:11:23 fbsd12 kernel: cd0: <QEMU QEMU DVD-ROM 2.5+> Removable CD-R=
OM
SCSI device
Jan 12 02:11:23 fbsd12 kernel: cd0: 150.000MB/s transfers (SATA 1.x, UDMA5,
ATAPI 12bytes, PIO 8192bytes)
Jan 12 02:11:23 fbsd12 kernel: em0: link state changed to UP
Jan 12 02:55:08 fbsd12 kernel: em0: <Intel(R) PRO/1000 Network Connection> =
port
0xc100-0xc13f mem 0xfc100000-0xfc11ffff irq 11 at device 3.0 on pci0
Jan 12 02:55:08 fbsd12 kernel: em0: attach_pre capping queues at 1
Jan 12 02:55:08 fbsd12 kernel: em0: using 1024 tx descriptors and 1024 rx
descriptors
Jan 12 02:55:08 fbsd12 kernel: em0: allocated for 1 tx_queues
Jan 12 02:55:08 fbsd12 kernel: em0: allocated for 1 rx_queues
Jan 12 02:55:08 fbsd12 kernel: em0: Ethernet address: 52:54:00:ea:98:ec
Jan 12 02:55:08 fbsd12 kernel: em0: netmap queues/slots: TX 1/1024, RX 1/10=
24
Jan 12 02:55:08 fbsd12 kernel: vtpcil0: <VirtIO PCI (legacy) Console adapte=
r>
port 0xc140-0xc17f mem 0xfc138000-0xfc138fff,0xfebec000-0xfebeffff irq 10 at
device 5.0 on pci0
Jan 12 02:55:08 fbsd12 kernel: vtpcil1: <VirtIO PCI (legacy) Balloon adapte=
r>
port 0xc220-0xc23f mem 0xfebf0000-0xfebf3fff irq 10 at device 6.0 on pci0
Jan 12 02:55:08 fbsd12 kernel: vtballoon0: <VirtIO Balloon Adapter> on vtpc=
il1

As you can see VirtIO + netmap works fine in legacy i440fx.  Attaching this=
 HDD
to the Q35 VM breaks the VirtIO detection.  If netmap is diabled in the ker=
nel,
VirtIO works fine for Q35.

--=20
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