[xpost,repost] VGA false positive in dmesg?

[Ottavio Caruso]

Hi,

[originally mailed to freebsd-questions, but I didn't get any feedback 
over there]

I've launched a FreeBSD 12.1 instance in qemu (pay attention to "-vga
none"). Host is Linux:

qemu-system-x86_64 \
-drive if=virtio,file=/home/oc/VM/img/freebsd.image,index=0,media=disk \
-M q35,accel=kvm -m 250M -cpu host -smp $(nproc) \
-nic user,hostfwd=tcp:127.0.0.1:5554-:22,model=virtio-net-pci \
-daemonize -display none -vga none \
-serial mon:telnet:127.0.0.1:6664,server,nowait \

In the guest:

oc at FreeBSD:~ % pciconf -vl
hostb0 at pci0:0:0:0:      class=0x060000 card=0x11001af4 chip=0x29c08086
rev=0x00 hdr=0x00
     vendor     = 'Intel Corporation'
     device     = '82G33/G31/P35/P31 Express DRAM Controller'
     class      = bridge
     subclass   = HOST-PCI
virtio_pci0 at pci0:0:1:0: class=0x020000 card=0x00011af4 chip=0x10001af4
rev=0x00 hdr=0x00
     vendor     = 'Red Hat, Inc.'
     device     = 'Virtio network device'
     class      = network
     subclass   = ethernet
virtio_pci1 at pci0:0:2:0: class=0x010000 card=0x00021af4 chip=0x10011af4
rev=0x00 hdr=0x00
     vendor     = 'Red Hat, Inc.'
     device     = 'Virtio block device'
     class      = mass storage
     subclass   = SCSI
virtio_pci2 at pci0:0:3:0: class=0x010000 card=0x00021af4 chip=0x10011af4
rev=0x00 hdr=0x00
     vendor     = 'Red Hat, Inc.'
     device     = 'Virtio block device'
     class      = mass storage
     subclass   = SCSI
isab0 at pci0:0:31:0:      class=0x060100 card=0x11001af4 chip=0x29188086
rev=0x02 hdr=0x00
     vendor     = 'Intel Corporation'
     device     = '82801IB (ICH9) LPC Interface Controller'
     class      = bridge
     subclass   = PCI-ISA
ahci0 at pci0:0:31:2:      class=0x010601 card=0x11001af4 chip=0x29228086
rev=0x02 hdr=0x00
     vendor     = 'Intel Corporation'
     device     = '82801IR/IO/IH (ICH9R/DO/DH) 6 port SATA Controller
[AHCI mode]'
     class      = mass storage
     subclass   = SATA
none0 at pci0:0:31:3:      class=0x0c0500 card=0x11001af4 chip=0x29308086
rev=0x02 hdr=0x00
     vendor     = 'Intel Corporation'
     device     = '82801I (ICH9 Family) SMBus Controller'
     class      = serial bus
     subclass   = SMBus

However, in dmesg:

oc at FreeBSD:~ % dmesg | grep -i vga
VT(vga): text 80x25
vtvga0: <VT VGA driver> on motherboard
vga0: <Generic ISA VGA> at port 0x3b0-0x3bb iomem 0xb0000-0xb7fff
pnpid PNP0900 on isa0

I don't know how to interpret this output. I don't think it's a qemu
issue, because I've done the same with NetBSD and OpenBSD guests and
there's no trace of vga in their dmesg.


Thanks

-- 
Ottavio Caruso

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