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Re: [Qemu-devel] [BUG] [Seabios] PCI 64bit BARs on Win2008 - unable to s

From: Alexey Korolev
Subject: Re: [Qemu-devel] [BUG] [Seabios] PCI 64bit BARs on Win2008 - unable to start the device. (ACPI lacks the _DSM method)
Date: Thu, 1 Dec 2011 18:19:45 +1300
User-agent: Mozilla/5.0 (X11; Linux i686; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 


On Wed, Nov 30, 2011 at 02:04:08PM +1300, Alexey Korolev wrote:

Hi,

We have got some issues with 64bit PCI devices support under Windows guests.
Windows fails to start any PCI devices with 64bit BARs when size
exceeds 512MB with error code 12 (can't allocate resources). In
other words it fails when the PCI memory region is located above
4GB.

I tried to investigate this problem and found document from Microsoft:
http://msdn.microsoft.com/en-us/windows/hardware/gg462986

It states that the _DSM method must be implemented to support
devices above 4GB.

That's not how I read it:
        Windows Vista always respects the boot configuration of devices above
        4 GB, considering the processor’s addressing capability and the version
        of the Windows operating system that is running.
Well, it's written in a very interesting way. They do recommend to have _DSM method in order to support 64bit. 
It is quite possible that the source of the problem is somewhere else.
Actually it is also quite interesting to know what is the resource window for 440FX? Perhaps Windows OS does not believe that 440FX supports 64bit PCI resources. But I see no way to check this. 
Unfortunately I'm not familiar with ACPI code of seabios, so can't
implement the _DSM method. May be you have other ideas what needs to
be done to fix it? Any help is appreciated.

Thanks,
Alexey

Could you share some more detail about your setup?


Ok Here are logs the faulty device is: 00:05.0.
In the first case the BAR1 size is 512MB and it fails in Windows (Linux is fine, the kernel enumerates the bus and assigns the resource above 4GB), 
In the second case the BAR1 size is 256M and works fine.
The first one causing issues. As PCI memory region for 00.0.5 is not assigned after windows boot. (Note. I also tried to supply a particular physical addresses over 4GB in pciinit.c code but this leads to completely the same behaviour. Windows just don't pick-up the resource.)
--------------------- Seabios log PCI BAR 512MB: ------------------------------------ 

Changing serial settings was 0/0 now 3/0
Start bios (version pre-0.6.3-20111201_162012-core-3000-3.et.endace.com)
enabling shadow ram
qemu_cfg_present=1
Find memory size
Ram Size=0xe0000000 (0x0000000320000000 high)
malloc setup
Relocating init from 0x000e01c0 to 0xdffe0980 (size 62800)
malloc fixup reloc
init ivt
init bda
init pic
init timer
CPU Mhz=2801
math cp init
init mtrr
pci setup
=== PCI bus & bridge init ===
PCI: pci_bios_init_bus_rec bus = 0x0
=== PCI device probing ===
PCI probe
PCI device 00:00.0 (vd=8086:1237 c=0600)
PCI device 00:01.0 (vd=8086:7000 c=0601)
PCI device 00:01.1 (vd=8086:7010 c=0101)
PCI device 00:01.2 (vd=8086:7020 c=0c03)
PCI device 00:01.3 (vd=8086:7113 c=0680)
PCI device 00:02.0 (vd=1013:00b8 c=0300)
PCI device 00:03.0 (vd=10ec:8139 c=0200)
PCI device 00:05.0 (vd=eace:eace c=0280)
PCI device 00:06.0 (vd=1af4:1002 c=0500)
Found 9 PCI devices (max PCI bus is 00)
=== PCI new allocation pass #1 ===
PCI: check devices bus 0
=== PCI new allocation pass #2 ===
PCI: init bases bus 0 (primary)
  type io max 100 sum 150 base c000
    size      100: 1 bar(s),     c000 ->     c0ff
    size       20: 2 bar(s),     c100 ->     c13f
    size       10: 1 bar(s),     c140 ->     c14f
  type mem max 10000 sum 32000 base febc0000
    size    10000: 3 bar(s), febc0000 -> febeffff
    size     1000: 2 bar(s), febf0000 -> febf1fff
  type prefmem max 2000000 sum 2000000 base fc000000
    size  2000000: 1 bar(s), fc000000 -> fdffffff
PCI: map device bus 0, bfd 0x0
PCI: map device bus 0, bfd 0x8
PCI: map device bus 0, bfd 0x9
  bar 4, addr c140, size 10 [io]
PCI: map device bus 0, bfd 0xa
  bar 4, addr c100, size 20 [io]
PCI: map device bus 0, bfd 0xb
PCI: map device bus 0, bfd 0x10
  bar 0, addr fc000000, size 2000000 [mem]
  bar 1, addr febf0000, size 1000 [mem]
  bar 6, addr febc0000, size 10000 [mem]
PCI: map device bus 0, bfd 0x18
  bar 0, addr c000, size 100 [io]
  bar 1, addr febf1000, size 100 [mem]
  bar 6, addr febd0000, size 10000 [mem]
PCI: map device bus 0, bfd 0x28
  bar 0, addr febe0000, size 10000 [mem]
  bar 1, addr 0, size 20000000 [mem]
PCI: map device bus 0, bfd 0x30
  bar 0, addr c120, size 20 [io]
PCI: bus=0 devfn=0x00: vendor_id=0x8086 device_id=0x1237
PCI: bus=0 devfn=0x08: vendor_id=0x8086 device_id=0x7000
PCI: bus=0 devfn=0x09: vendor_id=0x8086 device_id=0x7010
PCI: bus=0 devfn=0x0a: vendor_id=0x8086 device_id=0x7020
PCI: bus=0 devfn=0x0b: vendor_id=0x8086 device_id=0x7113
PCI: bus=0 devfn=0x10: vendor_id=0x1013 device_id=0x00b8
PCI: bus=0 devfn=0x18: vendor_id=0x10ec device_id=0x8139
PCI: bus=0 devfn=0x28: vendor_id=0xeace device_id=0xeace
PCI: bus=0 devfn=0x30: vendor_id=0x1af4 device_id=0x1002
init smm
boot order:
1: /address@hidden/address@hidden,1/address@hidden/address@hidden
2: /address@hidden/address@hidden,1/address@hidden/address@hidden
Found 2 cpu(s) max supported 2 cpu(s)
init bios32
init PMM
init PNPBIOS table
init keyboard
init mouse
init PIR table
init MPTable
MP table addr=0x000fda00 MPC table addr=0x000fda10 size=260
init SMBIOS tables
SMBIOS ptr=0x000fd9e0 table=0x000fd880 size=346
init ACPI tables
ACPI tables: RSDP=0x000fd850 RSDT=0xdfffd740
Scan for VGA option rom
Attempting to init PCI bdf 00:02.0 (vd 1013:00b8)
Copying option rom (size 35840) from 0xfebc0000 to c0000
Running option rom at c000:0003
Turning on vga text mode console
SeaBIOS (version pre-0.6.3-20111201_162012-core-3000-3.et.endace.com)

init usb
UHCI init on dev 00:01.2 (io=c100)
/dffdf000\ Start thread
/dffde000\ Start thread
/dffdd000\ Start thread
\dffdd000/ End thread
init ps2port
/dffdd000\ Start thread
init lpt
Found 0 lpt ports
init serial
Found 1 serial ports
init floppy drives
init hard drives ddr 0
ATA controller 1 at 1f0/3f4/0 (irq 14 dev 9)
/dffdb000\ Start thread
ATA controller 2 at 170/374/0 (irq 15 dev 9)
/dffda000\ Start thread
init ahci
init virtio-blk
|dffdb000| ata0-0: QEMU HARDDISK ATA-7 Hard-Disk (51200 MiBytes)
|dffdb000| Searching bootorder for: 
/address@hidden/address@hidden,1/address@hidden/address@hidden
|dffdb000| Registering bootable: ata0-0: QEMU HARDDISK ATA-7 Hard-Disk (51200 MiBytes) (type:2 prio:1 data:fd800) 
\dffdb000/ End thread
|dffda000| DVD/CD [ata1-0: QEMU DVD-ROM ATAPI-4 DVD/CD]
|dffda000| Searching bootorder for: 
/address@hidden/address@hidden,1/address@hidden/address@hidden
|dffda000| Registering bootable: DVD/CD [ata1-0: QEMU DVD-ROM ATAPI-4 DVD/CD] (type:3 prio:2 data:fd7d0) 
\dffda000/ End thread
|dffde000| set_address 0xdffe0150
|dffde000| config_usb: 0xdffdccec
|dffde000| device rev=0100 cls=00 sub=00 proto=00 size=08
|dffde000| usb_hid_init 0xdffdccec
\dffde000/ End thread
\dffdf000/ End thread
|dffdd000| PS2 keyboard initialized
\dffdd000/ End thread
All threads complete.
Scan for option roms
Attempting to init PCI bdf 00:00.0 (vd 8086:1237)
Attempting to init PCI bdf 00:01.0 (vd 8086:7000)
Attempting to init PCI bdf 00:01.2 (vd 8086:7020)
Attempting to init PCI bdf 00:01.3 (vd 8086:7113)
Attempting to init PCI bdf 00:03.0 (vd 10ec:8139)
Copying option rom (size 61440) from 0xfebd0000 to c9000
Running option rom at c900:0003
pmm call arg1=1
pmm01: handle=18ae1000
pmm call arg1=0
pmm00: length=f00 handle=18ae1000 flags=2
pmm call arg1=1
pmm01: handle=18ae2004
pmm call arg1=0
pmm00: length=4000 handle=18ae2004 flags=2
Attempting to init PCI bdf 00:05.0 (vd eace:eace)
Attempting to init PCI bdf 00:06.0 (vd 1af4:1002)
Searching bootorder for: /address@hidden/address@hidden
Registering bootable: iPXE (PCI 00:03.0) (type:128 prio:9999 data:c9000372)
Searching bootorder for: /address@hidden/vapic.bin
Registering bootable: Legacy option rom (type:129 prio:9999 data:ca000003)
Mapping hd drive 0x000fd800 to 0
drive 0x000fd800: PCHS=16383/16/63 translation=lba LCHS=1024/255/63 s=104857600 
Mapping cd drive 0x000fd7d0
Running option rom at ca00:0003
ebda moved from 9fc00 to 9f400
finalize PMM
malloc finalize
Returned 53248 bytes of ZoneHigh
e820 map has 7 items:
  0: 0000000000000000 - 000000000009f400 = 1 RAM
  1: 000000000009f400 - 00000000000a0000 = 2 RESERVED
  2: 00000000000f0000 - 0000000000100000 = 2 RESERVED
  3: 0000000000100000 - 00000000dfffd000 = 1 RAM
  4: 00000000dfffd000 - 00000000e0000000 = 2 RESERVED
  5: 00000000fffbc000 - 0000000100000000 = 2 RESERVED
  6: 0000000100000000 - 0000000420000000 = 1 RAM
locking shadow ram
Jump to int19
enter handle_19:


-------- PCI  INFO after boot ----------------------
  Bus  0, device   0, function 0:
    Host bridge: PCI device 8086:1237
      id ""
  Bus  0, device   1, function 0:
    ISA bridge: PCI device 8086:7000
      id ""
  Bus  0, device   1, function 1:
    IDE controller: PCI device 8086:7010
      BAR4: I/O at 0xc140 [0xc14f].
      id ""
  Bus  0, device   1, function 2:
    USB controller: PCI device 8086:7020
      IRQ 5.
      BAR4: I/O at 0xc100 [0xc11f].
      id ""
  Bus  0, device   1, function 3:
    Bridge: PCI device 8086:7113
      IRQ 9.
      id ""
  Bus  0, device   2, function 0:
    VGA controller: PCI device 1013:00b8
      BAR0: 32 bit prefetchable memory at 0xfc000000 [0xfdffffff].
      BAR1: 32 bit memory at 0xfebf0000 [0xfebf0fff].
      BAR6: 32 bit memory at 0xffffffffffffffff [0x0000fffe].
      id ""
  Bus  0, device   3, function 0:
    Ethernet controller: PCI device 10ec:8139
      IRQ 11.
      BAR0: I/O at 0xc000 [0xc0ff].
      BAR1: 32 bit memory at 0xfebf1000 [0xfebf10ff].
      BAR6: 32 bit memory at 0xffffffffffffffff [0x0000fffe].
      id "net0"
  Bus  0, device   5, function 0:
    Network controller: PCI device eace:eace
      IRQ 10.
      BAR0: 32 bit memory at 0xfebe0000 [0xfebeffff].
      BAR1: 64 bit prefetchable memory at 0xffffffffffffffff [0x1ffffffe].
      id ""
  Bus  0, device   6, function 0:
    RAM controller: PCI device 1af4:1002
      IRQ 10.
      BAR0: I/O at 0xc120 [0xc13f].
      id "balloon0"
--------------------- Seabios log PCI BAR 256MB: ------------------------------------ 


Changing serial settings was 0/0 now 3/0
Start bios (version pre-0.6.3-20111201_162012-core-3000-3.et.endace.com)
enabling shadow ram
qemu_cfg_present=1
Find memory size
Ram Size=0xe0000000 (0x0000000320000000 high)
malloc setup
Relocating init from 0x000e01c0 to 0xdffe0980 (size 62800)
malloc fixup reloc
init ivt
init bda
init pic
init timer
CPU Mhz=2801
math cp init
init mtrr
pci setup
=== PCI bus & bridge init ===
PCI: pci_bios_init_bus_rec bus = 0x0
=== PCI device probing ===
PCI probe
PCI device 00:00.0 (vd=8086:1237 c=0600)
PCI device 00:01.0 (vd=8086:7000 c=0601)
PCI device 00:01.1 (vd=8086:7010 c=0101)
PCI device 00:01.2 (vd=8086:7020 c=0c03)
PCI device 00:01.3 (vd=8086:7113 c=0680)
PCI device 00:02.0 (vd=1013:00b8 c=0300)
PCI device 00:03.0 (vd=10ec:8139 c=0200)
PCI device 00:05.0 (vd=eace:eace c=0280)
PCI device 00:06.0 (vd=1af4:1002 c=0500)
Found 9 PCI devices (max PCI bus is 00)
=== PCI new allocation pass #1 ===
PCI: check devices bus 0
=== PCI new allocation pass #2 ===
PCI: init bases bus 0 (primary)
  type io max 100 sum 150 base c000
    size      100: 1 bar(s),     c000 ->     c0ff
    size       20: 2 bar(s),     c100 ->     c13f
    size       10: 1 bar(s),     c140 ->     c14f
  type mem max 10000 sum 32000 base febc0000
    size    10000: 3 bar(s), febc0000 -> febeffff
    size     1000: 2 bar(s), febf0000 -> febf1fff
  type prefmem max 2000000 sum 2000000 base fc000000
    size  2000000: 1 bar(s), fc000000 -> fdffffff
PCI: map device bus 0, bfd 0x0
PCI: map device bus 0, bfd 0x8
PCI: map device bus 0, bfd 0x9
  bar 4, addr c140, size 10 [io]
PCI: map device bus 0, bfd 0xa
  bar 4, addr c100, size 20 [io]
PCI: map device bus 0, bfd 0xb
PCI: map device bus 0, bfd 0x10
  bar 0, addr fc000000, size 2000000 [mem]
  bar 1, addr febf0000, size 1000 [mem]
  bar 6, addr febc0000, size 10000 [mem]
PCI: map device bus 0, bfd 0x18
  bar 0, addr c000, size 100 [io]
  bar 1, addr febf1000, size 100 [mem]
  bar 6, addr febd0000, size 10000 [mem]
PCI: map device bus 0, bfd 0x28
  bar 0, addr febe0000, size 10000 [mem]
  bar 1, addr 0, size 10000000 [mem]
PCI: map device bus 0, bfd 0x30
  bar 0, addr c120, size 20 [io]
PCI: bus=0 devfn=0x00: vendor_id=0x8086 device_id=0x1237
PCI: bus=0 devfn=0x08: vendor_id=0x8086 device_id=0x7000
PCI: bus=0 devfn=0x09: vendor_id=0x8086 device_id=0x7010
PCI: bus=0 devfn=0x0a: vendor_id=0x8086 device_id=0x7020
PCI: bus=0 devfn=0x0b: vendor_id=0x8086 device_id=0x7113
PCI: bus=0 devfn=0x10: vendor_id=0x1013 device_id=0x00b8
PCI: bus=0 devfn=0x18: vendor_id=0x10ec device_id=0x8139
PCI: bus=0 devfn=0x28: vendor_id=0xeace device_id=0xeace
PCI: bus=0 devfn=0x30: vendor_id=0x1af4 device_id=0x1002
init smm
boot order:
1: /address@hidden/address@hidden,1/address@hidden/address@hidden
2: /address@hidden/address@hidden,1/address@hidden/address@hidden
Found 2 cpu(s) max supported 2 cpu(s)
init bios32
init PMM
init PNPBIOS table
init keyboard
init mouse
init PIR table
init MPTable
MP table addr=0x000fda00 MPC table addr=0x000fda10 size=260
init SMBIOS tables
SMBIOS ptr=0x000fd9e0 table=0x000fd880 size=346
init ACPI tables
ACPI tables: RSDP=0x000fd850 RSDT=0xdfffd740
Scan for VGA option rom
Attempting to init PCI bdf 00:02.0 (vd 1013:00b8)
Copying option rom (size 35840) from 0xfebc0000 to c0000
Running option rom at c000:0003
Turning on vga text mode console
SeaBIOS (version pre-0.6.3-20111201_162012-core-3000-3.et.endace.com)

init usb
UHCI init on dev 00:01.2 (io=c100)
/dffdf000\ Start thread
/dffde000\ Start thread
/dffdd000\ Start thread
\dffdd000/ End thread
init ps2port
/dffdd000\ Start thread
init lpt
Found 0 lpt ports
init serial
Found 1 serial ports
init floppy drives
init hard drives
ATA controller 1 at 1f0/3f4/0 (irq 14 dev 9)
/dffdb000\ Start thread
ATA controller 2 at 170/374/0 (irq 15 dev 9)
/dffda000\ Start thread
init ahci
init virtio-blk
|dffdb000| ata0-0: QEMU HARDDISK ATA-7 Hard-Disk (51200 MiBytes)
|dffdb000| Searching bootorder for: 
/address@hidden/address@hidden,1/address@hidden/address@hidden
|dffdb000| Registering bootable: ata0-0: QEMU HARDDISK ATA-7 Hard-Disk (51200 MiBytes) (type:2 prio:1 data:fd800) 
\dffdb000/ End thread
|dffda000| DVD/CD [ata1-0: QEMU DVD-ROM ATAPI-4 DVD/CD]
|dffda000| Searching bootorder for: 
/address@hidden/address@hidden,1/address@hidden/address@hidden
|dffda000| Registering bootable: DVD/CD [ata1-0: QEMU DVD-ROM ATAPI-4 DVD/CD] (type:3 prio:2 data:fd7d0) 
\dffda000/ End thread
|dffde000| set_address 0xdffe0150
|dffde000| config_usb: 0xdffdccec
|dffde000| device rev=0100 cls=00 sub=00 proto=00 size=08
|dffde000| usb_hid_init 0xdffdccec
\dffde000/ End thread
\dffdf000/ End thread
|dffdd000| PS2 keyboard initialized
\dffdd000/ End thread
All threads complete.
Scan for option roms
Attempting to init PCI bdf 00:00.0 (vd 8086:1237)
Attempting to init PCI bdf 00:01.0 (vd 8086:7000)
Attempting to init PCI bdf 00:01.2 (vd 8086:7020)
Attempting to init PCI bdf 00:01.3 (vd 8086:7113)
Attempting to init PCI bdf 00:03.0 (vd 10ec:8139)
Copying option rom (size 61440) from 0xfebd0000 to c9000
Running option rom at c900:0003
pmm call arg1=1
pmm01: handle=18ae1000
pmm call arg1=0
pmm00: length=f00 handle=18ae1000 flags=2
pmm call arg1=1
pmm01: handle=18ae2004
pmm call arg1=0
pmm00: length=4000 handle=18ae2004 flags=2
Attempting to init PCI bdf 00:05.0 (vd eace:eace)
Attempting to init PCI bdf 00:06.0 (vd 1af4:1002)
Searching bootorder for: /address@hidden/address@hidden
Registering bootable: iPXE (PCI 00:03.0) (type:128 prio:9999 data:c9000372)
Searching bootorder for: /address@hidden/vapic.bin
Registering bootable: Legacy option rom (type:129 prio:9999 data:ca000003)
Mapping hd drive 0x000fd800 to 0
drive 0x000fd800: PCHS=16383/16/63 translation=lba LCHS=1024/255/63 s=104857600 
Mapping cd drive 0x000fd7d0
Running option rom at ca00:0003
ebda moved from 9fc00 to 9f400
finalize PMM
malloc finalize
Returned 53248 bytes of ZoneHigh
e820 map has 7 items:
  0: 0000000000000000 - 000000000009f400 = 1 RAM
  1: 000000000009f400 - 00000000000a0000 = 2 RESERVED
  2: 00000000000f0000 - 0000000000100000 = 2 RESERVED
  3: 0000000000100000 - 00000000dfffd000 = 1 RAM
  4: 00000000dfffd000 - 00000000e0000000 = 2 RESERVED
  5: 00000000fffbc000 - 0000000100000000 = 2 RESERVED
  6: 0000000100000000 - 0000000420000000 = 1 RAM
locking shadow ram
Jump to int19
enter handle_19:
  NULL
Booting from Hard Disk...
Booting from 0000:7c00
unimplemented handle_1aXX:441:
   a=0000bb00  b=0000aa55  c=0000ffff  d=00000080 ds=0000 es=0000 ss=0000
  si=00007e00 di=00000800 bp=000007be sp=00007bfe cs=0000 ip=06e7  f=3246
unimplemented handle_1aXX:441:
   a=0000bb00  b=00000000  c=00000000  d=000009a0 ds=07c0 es=09a0 ss=0000
  si=00007be4 di=00000800 bp=000007be sp=00007c00 cs=07c0 ip=00db  f=3246
unimplemented handle_1aXX:441:
   a=0000bb00  b=00000000  c=0000005e  d=00000000 ds=07c0 es=2000 ss=0000
  si=00003808 di=00000000 bp=000007be sp=00007bda cs=07c0 ip=0f54  f=3246
unimplemented handle_1aXX:441:
   a=0000bb00  b=00000000  c=00000000  d=00000000 ds=0000 es=0000 ss=23de
  si=00000000 di=00000000 bp=00000000 sp=00001462 cs=2000 ip=0a39  f=3256
unimplemented handle_1aXX:441:
   a=0000bb00  b=00000000  c=00000000  d=00000000 ds=0000 es=0000 ss=23de
  si=00000000 di=00000000 bp=00000000 sp=00001462 cs=2000 ip=0a39  f=3256
invalid handle_legacy_disk:841:
   a=00001500  b=00000000  c=00000000  d=00000000 ds=0000 es=0000 ss=23de
  si=00000000 di=00000000 bp=00000000 sp=00001462 cs=2000 ip=0a1d  f=3246
invalid handle_legacy_disk:841:
   a=00001500  b=00000000  c=00000000  d=00000001 ds=0000 es=0000 ss=23de
  si=00000000 di=00000000 bp=00000000 sp=00001462 cs=2000 ip=0a1d  f=3246
--------------------- Seabios log PCI BAR 256MB: ------------------------------------ 

  Bus  0, device   0, function 0:
    Host bridge: PCI device 8086:1237
      id ""
  Bus  0, device   1, function 0:
    ISA bridge: PCI device 8086:7000
      id ""
  Bus  0, device   1, function 1:
    IDE controller: PCI device 8086:7010
      BAR4: I/O at 0xc140 [0xc14f].
      id ""
  Bus  0, device   1, function 2:
    USB controller: PCI device 8086:7020
      IRQ 5.
      BAR4: I/O at 0xc100 [0xc11f].
      id ""
  Bus  0, device   1, function 3:
    Bridge: PCI device 8086:7113
      IRQ 9.
      id ""
  Bus  0, device   2, function 0:
    VGA controller: PCI device 1013:00b8
      BAR0: 32 bit prefetchable memory at 0xfc000000 [0xfdffffff].
      BAR1: 32 bit memory at 0xfebf0000 [0xfebf0fff].
      BAR6: 32 bit memory at 0xffffffffffffffff [0x0000fffe].
      id ""
  Bus  0, device   3, function 0:
    Ethernet controller: PCI device 10ec:8139
      IRQ 11.
      BAR0: I/O at 0xc000 [0xc0ff].
      BAR1: 32 bit memory at 0xfebf1000 [0xfebf10ff].
      BAR6: 32 bit memory at 0xffffffffffffffff [0x0000fffe].
      id "net0"
  Bus  0, device   5, function 0:
    Network controller: PCI device eace:eace
      IRQ 10.
      BAR0: 32 bit memory at 0xfebe0000 [0xfebeffff].
      BAR1: 64 bit prefetchable memory at 0xe0000000 [0xefffffff].
      id ""
  Bus  0, device   6, function 0:
    RAM controller: PCI device 1af4:1002
      IRQ 10.
      BAR0: I/O at 0xc120 [0xc13f].
      id "balloon0"
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