qemu to linux mapping of smbios / dmi information

README.md

Mappings for DMI/SMBIOS to Linux and dmidecode

Information can be put into dmi tables via some qemu-system hosts (x86_64 and aarch64). That information is exposed in Linux under /sys/class/dmi/id and can be read with dmidecode. The names are very annoyingly inconsistent. The point of this doc is to map them.

Mappings

Example qemu cmdline:

qemu-system-x86_64 -smbios type=<type>,field=value[,...]

qemu-system-x86_64 -smbios type=0,vendor=superco,version=1.2.3

type	-smbios field	Linux path	dmidecode --string=F
0	vendor	bios_vendor	bios-vendor
0	date	bios_date	bios-release-date
0	version	bios_version	bios-version
0	release=(%d.%d)	n/a	n/a
0	uefi=(on|off)	n/a	n/a
1	manufacturer	sys_vendor	system-manufacturer
1	product	product_name	system-product-name
1	version	product_version	system-version
1	serial	product_serial	system-serial-number
1	uuid	product_uuid	system-uuid
1	sku	n/a	n/a
1	family	product_family	n/a
2	manufacturer	board_vendor	baseboard-manufacturer
2	product	board_name	baseboard-product-name
2	version	board_version	baseboard-version
2	serial	board_serial	baseboard-serial-number
2	asset	asset_tag	baseboard-asset-tag
2	location	n/a	n/a
3	manufacturer	chassis_vendor	chassis-manufacturer
3	version	chassis_version	chassis-version
3	serial	chassis_serial	chassis-serial-number
3	asset	chassis_asset_tag	chassis-asset-tag
3	sku	n/a	n/a
4	sock_pfx	n/a	n/a
4	manufacturer	n/a	processor-manufacturer
4	version	n/a	processor-version
4	serial	n/a	n/a
4	asset	n/a	n/a
4	part	n/a	n/a
11	value	n/a	--oem-string=N
17	loc_pfx	n/a	n/a
17	bank	n/a	n/a
17	manufacturer	n/a	n/a
17	serial	n/a	n/a
17	asset	n/a	n/a
17	part=(%d)	n/a	n/a
17	speed=(%d)	n/a	n/a

Notes

• product_family not available in 4.4.0-28-generic kernel but 4.15 is.
• More info on OEM string information linked from Bug 1753558
• linux exposes these files in /sys/devices/virtual/dmi/id and /sys/class/dmi/id

values in /sys/class/dmi/id

• cirros 0.4.0 (4.4.0-28-generic)

  bios_date:0date
  bios_vendor:0vendor
  bios_version:0version
  board_asset_tag:t2asset
  board_name:t2product
  board_serial:t2serial
  board_vendor:t2manufacturer
  board_version:t2version
  chassis_asset_tag:t3asset
  chassis_serial:t3serial
  chassis_type:1
  chassis_vendor:t3manufacturer
  chassis_version:t3version
  modalias:dmi:bvn0vendor:bvr0version:bd0date:svnt1manufacturer:pnt1product:pvrt1:
  power/control:auto
  power/async:disabled
  power/runtime_enabled:disabled
  power/runtime_active_kids:0
  power/runtime_active_time:0
  power/runtime_status:unsupported
  power/runtime_usage:0
  power/runtime_suspended_time:0
  product_name:t1product
  product_serial:t1serial
  product_uuid:11111111-1111-1111-1111-111111111111
  product_version:t1version
  sys_vendor:t1manufacturer
  uevent:MODALIAS=dmi:bvn0vendor:bvr0version:bd0date:svnt1manufacturer:pnt1produc:
  

• 4.14.57

  bios_date:0date
  bios_vendor:0vendor
  bios_version:0version
  board_asset_tag:t2asset
  board_name:t2product
  board_serial:t2serial
  board_vendor:t2manufacturer
  board_version:t2version
  chassis_asset_tag:t3asset
  chassis_serial:t3serial
  chassis_type:1
  chassis_vendor:t3manufacturer
  chassis_version:t3version
  modalias:dmi:bvn0vendor:bvr0version:bd0date:svnt1manufacturer:pnt1product:pvrt1version:rvnt2manufacturer:rnt2product:rvrt2version:cvnt3manufacturer:ct1:cvrt3version:
  power/control:auto
  power/runtime_active_time:0
  power/runtime_status:unsupported
  power/runtime_suspended_time:0
  product_family:t1family
  product_name:t1product
  product_serial:t1serial
  product_uuid:11111111-1111-1111-1111-111111111111
  product_version:t1version
  sys_vendor:t1manufacturer
  uevent:MODALIAS=dmi:bvn0vendor:bvr0version:bd0date:svnt1manufacturer:pnt1product:pvrt1version:rvnt2manufacturer:rnt2product:rvrt2version:cvnt3manufacturer:ct1:cvrt3version:
  

boot-guest

#!/bin/bash
# download cirros image and boot it.
MEM=${MEM:-64}
HOSTARCH="${HOSTARCH:-x86_64}"
GUESTARCH="${GUESTARCH:-${HOSTARCH}}"


ver="0.4.0"
img_url="http://download.cirros-cloud.net/$ver/cirros-$ver-$GUESTARCH-disk.img"
img_dist=${1:-${img_url##*/}}
if [ ! -f "$img_dist" ]; then
   wget "$img_url" -O "$img_dist.tmp" &&
      mv "$img_dist.tmp" "$img_dist"
fi

echo "$HOSTARCH/$GUESTARCH/$MEM [$img_dist]"

echo '{"instance-id": "9068aef2-213e-4e43-830f-accdbadde897"}' > meta-data
#{ echo '#!/bin/sh'; echo 'poweroff'; } > user-data
{ echo '#!/bin/sh'; echo 'echo poweroff'; } > user-data

cloud-localds seed.img user-data meta-data

qemu-img create -f qcow2 -b "$img_dist" disk1.img >/dev/null 2>&1

smbios=(
    -smbios "type=1,family=${family}"
    -smbios "type=0,vendor=0vendor,version=0version,date=0date,release=0.0,uefi=
on"
    -smbios "type=1,manufacturer=t1manufacturer,product=t1product,version=t1vers
ion,serial=t1serial,uuid=11111111-1111-1111-1111-111111111111,sku=t1sku,family=t
1family"
    -smbios "type=2,manufacturer=t2manufacturer,product=t2product,version=t2vers
ion,serial=t2serial,asset=t2asset,location=t2location"
    -smbios "type=3,manufacturer=t3manufacturer,version=t3version,serial=t3seria
l,asset=t3asset,sku=t3sku"
    -smbios "type=4,sock_pfx=t4sock_pfx,manufacturer=t4manufacturer,version=t4ve
rsion,serial=t4serial,asset=t4asset,part=t4part"
    # https://bugs.launchpad.net/cloud-init/+bug/1753558
    -smbios "type=11,value=Hello,value=World"
    -smbios "type=17,loc_pfx=t17loc_pfx,bank=t17bank,manufacturer=t17manufacture
r,serial=t17serial,asset=t17asset,part=17part,speed=17"

)

qemu-system-$HOSTARCH -m $MEM \
   -device virtio-net-pci,netdev=net00 \
   -netdev type=user,id=net00,net=10.0.12.0/24,host=10.0.12.2 \
   -drive if=virtio,file=disk1.img \
   -drive if=virtio,file=seed.img \
   "${smbios[@]}" \
   -nographic