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Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot
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From: |
Roman Kagan |
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Subject: |
Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot |
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Date: |
Thu, 21 Jul 2022 17:28:27 +0300 |
On Wed, Jul 20, 2022 at 02:21:38PM +0100, Mark Cave-Ayland wrote:
> On 20/07/2022 12:00, Roman Kagan wrote:
>
> > On Wed, Jul 20, 2022 at 11:44:26AM +0100, Daniel P. Berrangé wrote:
> > > On Wed, Jul 20, 2022 at 01:25:55PM +0300, Roman Kagan wrote:
> > > > It's possible to create non-working configurations by attaching a device
> > > > to a derivative of PCIe slot (pcie-root-port, ioh3420, etc) and
> > > > specifying a slot number other that zero, e.g.:
> > > >
> > > > -device pcie-root-port,id=s0,... \
> > > > -device virtio-blk-pci,bus=s0,addr=4,...
> > > >
> > > > Make QEMU reject such configurations and only allow addr=0 on the
> > > > secondary bus of a PCIe slot.
> > >
> > > What do you mean by 'non-working' in this case. The guest OS boots
> > > OK, but I indeed don't see the device in the guest, but IIUC it was
> > > said that was just because Linux doesn't scan for a non-zero slot.
> >
> > Right. I don't remember if it was Linux or firmware or both but indeed
> > at least Linux guests don't see devices if attached to a PCIe slot at
> > addr != 0. (Which is kinda natural for a thing called "slot", isn't it?)
> >
> > > That wouldn't be a broken config from QEMU's POV though, merely a
> > > guest OS limitation ?
> >
> > Strictly speaking it wouldn't, indeed. But we've had created such a
> > configuration (due to a bug in our management layer) and spent
> > non-negligible time trying to figure out why the attached device didn't
> > appear in the guest. So I thought it made sense to reject a
> > configuration which is known to confuse guests. Doesn't it?
>
> This does seem a bit odd. What does the output of "info qtree" look like for
> your non-working configuration?
Sure:
command line:
# qemu-system-x86_64 \
-name test,debug-threads=on \
-msg timestamp=on \
-machine q35,sata=false,usb=off \
-accel kvm \
-cpu Haswell-noTSX \
-smp 4,sockets=1,cores=4,threads=1 \
-vga std \
-m 4096M \
-object memory-backend-memfd,id=mem0,size=4096M,share=on \
-numa node,memdev=mem0,cpus=0-3 \
-nodefaults \
-no-user-config \
-chardev stdio,id=mon0 \
-mon chardev=mon0,mode=readline \
-boot strict=on \
-device vmcoreinfo \
-device pvpanic \
-device qemu-xhci,id=usb0 \
-device usb-tablet,bus=usb0.0 \
-chardev
socket,path=serial0.sock,logfile=serial0.log,id=charserial0,reconnect=1 \
-device isa-serial,chardev=charserial0,id=serial0 \
-chardev file,path=bios0.log,id=debugcon \
-device isa-debugcon,iobase=0x402,chardev=debugcon \
-device
pcie-root-port,id=s0,slot=0,bus=pcie.0,addr=05.0,multifunction=on,io-reserve=0 \
-device
pcie-root-port,id=s1,slot=1,bus=pcie.0,addr=05.1,multifunction=on,io-reserve=0 \
-device
pcie-root-port,id=s2,slot=2,bus=pcie.0,addr=05.2,multifunction=on,io-reserve=0 \
-device
pcie-root-port,id=s3,slot=3,bus=pcie.0,addr=05.3,multifunction=on,io-reserve=0 \
-drive
format=qcow2,file=f34.qcow2,id=hdd0,if=none,aio=native,cache=directsync,discard=unmap
\
-netdev user,id=netdev0,hostfwd=tcp::0-:22 \
-device virtio-net-pci,disable-legacy=off,netdev=netdev0,id=net0,bus=s1 \
-object iothread,id=iot0 \
-device
virtio-blk-pci,disable-legacy=off,scsi=off,rerror=report,werror=report,id=vblk0,drive=hdd0,bus=s0,iothread=iot0,bootindex=1
\
-object iothread,id=iot2 \
-drive driver=null-co,size=64M,id=hdd2,if=none \
-device
virtio-blk-pci,disable-legacy=off,scsi=off,rerror=report,werror=report,id=vblk2,drive=hdd2,bus=s2,iothread=iot2,num-queues=4,addr=4
\
-nographic
qemu HMP:
(qemu) info qtree
bus: main-system-bus
type System
dev: ps2-mouse, id ""
gpio-out "" 1
dev: ps2-kbd, id ""
gpio-out "" 1
dev: hpet, id ""
gpio-in "" 2
gpio-out "" 1
gpio-out "sysbus-irq" 32
timers = 3 (0x3)
msi = false
hpet-intcap = 16711940 (0xff0104)
hpet-offset-saved = true
mmio 00000000fed00000/0000000000000400
dev: kvm-ioapic, id ""
gpio-in "" 24
gsi_base = 0 (0x0)
mmio 00000000fec00000/0000000000001000
dev: q35-pcihost, id ""
MCFG = 2952790016 (0xb0000000)
pci-hole64-size = 34359738368 (32 GiB)
short_root_bus = 0 (0x0)
below-4g-mem-size = 2147483648 (2 GiB)
above-4g-mem-size = 2147483648 (2 GiB)
x-pci-hole64-fix = true
x-config-reg-migration-enabled = true
bypass-iommu = false
bus: pcie.0
type PCIE
dev: pcie-root-port, id "s3"
x-migrate-msix = true
bus-reserve = 4294967295 (0xffffffff)
io-reserve = 0 (0 B)
mem-reserve = 18446744073709551615 (16 EiB)
pref32-reserve = 18446744073709551615 (16 EiB)
pref64-reserve = 18446744073709551615 (16 EiB)
x-speed = "16"
x-width = "32"
power_controller_present = true
disable-acs = false
chassis = 0 (0x0)
slot = 3 (0x3)
hotplug = true
x-native-hotplug = true
port = 0 (0x0)
aer_log_max = 8 (0x8)
addr = 05.3
romfile = ""
romsize = 4294967295 (0xffffffff)
rombar = 1 (0x1)
multifunction = true
x-pcie-lnksta-dllla = true
x-pcie-extcap-init = true
failover_pair_id = ""
acpi-index = 0 (0x0)
class PCI bridge, addr 00:05.3, pci id 1b36:000c (sub 0000:0000)
bar 0: mem at 0xfea18000 [0xfea18fff]
bus: s3
type PCIE
dev: pcie-root-port, id "s2"
x-migrate-msix = true
bus-reserve = 4294967295 (0xffffffff)
io-reserve = 0 (0 B)
mem-reserve = 18446744073709551615 (16 EiB)
pref32-reserve = 18446744073709551615 (16 EiB)
pref64-reserve = 18446744073709551615 (16 EiB)
x-speed = "16"
x-width = "32"
power_controller_present = true
disable-acs = false
chassis = 0 (0x0)
slot = 2 (0x2)
hotplug = true
x-native-hotplug = true
port = 0 (0x0)
aer_log_max = 8 (0x8)
addr = 05.2
romfile = ""
romsize = 4294967295 (0xffffffff)
rombar = 1 (0x1)
multifunction = true
x-pcie-lnksta-dllla = true
x-pcie-extcap-init = true
failover_pair_id = ""
acpi-index = 0 (0x0)
class PCI bridge, addr 00:05.2, pci id 1b36:000c (sub 0000:0000)
bar 0: mem at 0xfea17000 [0xfea17fff]
bus: s2
type PCIE
dev: virtio-blk-pci, id "vblk2"
disable-legacy = "off"
disable-modern = false
class = 0 (0x0)
ioeventfd = true
vectors = 5 (0x5)
virtio-pci-bus-master-bug-migration = false
migrate-extra = true
modern-pio-notify = false
x-disable-pcie = false
page-per-vq = false
x-ignore-backend-features = false
ats = false
x-ats-page-aligned = true
x-pcie-deverr-init = true
x-pcie-lnkctl-init = true
x-pcie-pm-init = true
x-pcie-flr-init = true
aer = false
addr = 04.0
romfile = ""
romsize = 4294967295 (0xffffffff)
rombar = 1 (0x1)
multifunction = false
x-pcie-lnksta-dllla = true
x-pcie-extcap-init = true
failover_pair_id = ""
acpi-index = 0 (0x0)
class SCSI controller, addr 03:04.0, pci id 1af4:1001 (sub
1af4:0002)
bar 0: i/o at 0xffffffffffffffff [0x7e]
bar 1: mem at 0xffffffffffffffff [0xffe]
bar 4: mem at 0xffffffffffffffff [0x3ffe]
bus: virtio-bus
type virtio-pci-bus
dev: virtio-blk-device, id ""
drive = "hdd2"
backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
opt_io_size = 0 (0 B)
discard_granularity = 4294967295 (4 GiB)
write-cache = "auto"
share-rw = false
rerror = "report"
werror = "report"
cyls = 130 (0x82)
heads = 16 (0x10)
secs = 63 (0x3f)
lcyls = 0 (0x0)
lheads = 0 (0x0)
lsecs = 0 (0x0)
serial = ""
config-wce = true
scsi = false
request-merging = true
num-queues = 4 (0x4)
queue-size = 256 (0x100)
seg-max-adjust = true
discard = true
report-discard-granularity = true
write-zeroes = true
max-discard-sectors = 4194303 (0x3fffff)
max-write-zeroes-sectors = 4194303 (0x3fffff)
x-enable-wce-if-config-wce = true
indirect_desc = true
event_idx = true
notify_on_empty = true
any_layout = true
iommu_platform = false
packed = false
use-started = true
use-disabled-flag = true
x-disable-legacy-check = false
dev: pcie-root-port, id "s1"
x-migrate-msix = true
bus-reserve = 4294967295 (0xffffffff)
io-reserve = 0 (0 B)
mem-reserve = 18446744073709551615 (16 EiB)
pref32-reserve = 18446744073709551615 (16 EiB)
pref64-reserve = 18446744073709551615 (16 EiB)
x-speed = "16"
x-width = "32"
power_controller_present = true
disable-acs = false
chassis = 0 (0x0)
slot = 1 (0x1)
hotplug = true
x-native-hotplug = true
port = 0 (0x0)
aer_log_max = 8 (0x8)
addr = 05.1
romfile = ""
romsize = 4294967295 (0xffffffff)
rombar = 1 (0x1)
multifunction = true
x-pcie-lnksta-dllla = true
x-pcie-extcap-init = true
failover_pair_id = ""
acpi-index = 0 (0x0)
class PCI bridge, addr 00:05.1, pci id 1b36:000c (sub 0000:0000)
bar 0: mem at 0xfea16000 [0xfea16fff]
bus: s1
type PCIE
dev: virtio-net-pci, id "net0"
disable-legacy = "off"
disable-modern = false
ioeventfd = true
vectors = 4 (0x4)
virtio-pci-bus-master-bug-migration = false
migrate-extra = true
modern-pio-notify = false
x-disable-pcie = false
page-per-vq = false
x-ignore-backend-features = false
ats = false
x-ats-page-aligned = true
x-pcie-deverr-init = true
x-pcie-lnkctl-init = true
x-pcie-pm-init = true
x-pcie-flr-init = true
aer = false
addr = 00.0
romfile = "efi-virtio.rom"
romsize = 262144 (0x40000)
rombar = 1 (0x1)
multifunction = false
x-pcie-lnksta-dllla = true
x-pcie-extcap-init = true
failover_pair_id = ""
acpi-index = 0 (0x0)
class Ethernet controller, addr 02:00.0, pci id 1af4:1000 (sub
1af4:0001)
bar 0: i/o at 0x2000 [0x201f]
bar 1: mem at 0xfe640000 [0xfe640fff]
bar 4: mem at 0xfd400000 [0xfd403fff]
bar 6: mem at 0xffffffffffffffff [0x3fffe]
bus: virtio-bus
type virtio-pci-bus
dev: virtio-net-device, id ""
csum = true
guest_csum = true
gso = true
guest_tso4 = true
guest_tso6 = true
guest_ecn = true
guest_ufo = true
guest_announce = true
host_tso4 = true
host_tso6 = true
host_ecn = true
host_ufo = true
mrg_rxbuf = true
status = true
ctrl_vq = true
ctrl_rx = true
ctrl_vlan = true
ctrl_rx_extra = true
ctrl_mac_addr = true
ctrl_guest_offloads = true
mq = false
rss = false
hash = false
guest_rsc_ext = false
rsc_interval = 300000 (0x493e0)
mac = "52:54:00:12:34:56"
netdev = "netdev0"
x-txtimer = 150000 (0x249f0)
x-txburst = 256 (0x100)
tx = ""
rx_queue_size = 256 (0x100)
tx_queue_size = 256 (0x100)
host_mtu = 0 (0x0)
x-mtu-bypass-backend = true
speed = -1 (0xffffffffffffffff)
duplex = ""
failover = false
indirect_desc = true
event_idx = true
notify_on_empty = true
any_layout = true
iommu_platform = false
packed = false
use-started = true
use-disabled-flag = true
x-disable-legacy-check = false
dev: pcie-root-port, id "s0"
x-migrate-msix = true
bus-reserve = 4294967295 (0xffffffff)
io-reserve = 0 (0 B)
mem-reserve = 18446744073709551615 (16 EiB)
pref32-reserve = 18446744073709551615 (16 EiB)
pref64-reserve = 18446744073709551615 (16 EiB)
x-speed = "16"
x-width = "32"
power_controller_present = true
disable-acs = false
chassis = 0 (0x0)
slot = 0 (0x0)
hotplug = true
x-native-hotplug = true
port = 0 (0x0)
aer_log_max = 8 (0x8)
addr = 05.0
romfile = ""
romsize = 4294967295 (0xffffffff)
rombar = 1 (0x1)
multifunction = true
x-pcie-lnksta-dllla = true
x-pcie-extcap-init = true
failover_pair_id = ""
acpi-index = 0 (0x0)
class PCI bridge, addr 00:05.0, pci id 1b36:000c (sub 0000:0000)
bar 0: mem at 0xfea15000 [0xfea15fff]
bus: s0
type PCIE
dev: virtio-blk-pci, id "vblk0"
disable-legacy = "off"
disable-modern = false
class = 0 (0x0)
ioeventfd = true
vectors = 5 (0x5)
virtio-pci-bus-master-bug-migration = false
migrate-extra = true
modern-pio-notify = false
x-disable-pcie = false
page-per-vq = false
x-ignore-backend-features = false
ats = false
x-ats-page-aligned = true
x-pcie-deverr-init = true
x-pcie-lnkctl-init = true
x-pcie-pm-init = true
x-pcie-flr-init = true
aer = false
addr = 00.0
romfile = ""
romsize = 4294967295 (0xffffffff)
rombar = 1 (0x1)
multifunction = false
x-pcie-lnksta-dllla = true
x-pcie-extcap-init = true
failover_pair_id = ""
acpi-index = 0 (0x0)
class SCSI controller, addr 01:00.0, pci id 1af4:1001 (sub
1af4:0002)
bar 0: i/o at 0x1000 [0x107f]
bar 1: mem at 0xfe800000 [0xfe800fff]
bar 4: mem at 0xfd600000 [0xfd603fff]
bus: virtio-bus
type virtio-pci-bus
dev: virtio-blk-device, id ""
drive = "hdd0"
backend_defaults = "auto"
logical_block_size = 512 (512 B)
physical_block_size = 512 (512 B)
min_io_size = 0 (0 B)
opt_io_size = 0 (0 B)
discard_granularity = 4294967295 (4 GiB)
write-cache = "auto"
share-rw = false
rerror = "report"
werror = "report"
cyls = 10402 (0x28a2)
heads = 16 (0x10)
secs = 63 (0x3f)
lcyls = 0 (0x0)
lheads = 0 (0x0)
lsecs = 0 (0x0)
serial = ""
config-wce = true
scsi = false
request-merging = true
num-queues = 4 (0x4)
queue-size = 256 (0x100)
seg-max-adjust = true
discard = true
report-discard-granularity = true
write-zeroes = true
max-discard-sectors = 4194303 (0x3fffff)
max-write-zeroes-sectors = 4194303 (0x3fffff)
x-enable-wce-if-config-wce = true
indirect_desc = true
event_idx = true
notify_on_empty = true
any_layout = true
iommu_platform = false
packed = false
use-started = true
use-disabled-flag = true
x-disable-legacy-check = false
dev: qemu-xhci, id "usb0"
addr = 02.0
romfile = ""
romsize = 4294967295 (0xffffffff)
rombar = 1 (0x1)
multifunction = false
x-pcie-lnksta-dllla = true
x-pcie-extcap-init = true
failover_pair_id = ""
acpi-index = 0 (0x0)
class USB controller, addr 00:02.0, pci id 1b36:000d (sub 1af4:1100)
bar 0: mem at 0xfea10000 [0xfea13fff]
bus: usb0.0
type usb-bus
dev: usb-tablet, id ""
usb_version = 2 (0x2)
display = ""
head = 0 (0x0)
port = ""
serial = ""
msos-desc = true
pcap = ""
addr 0.1, port 1, speed 480, name QEMU USB Tablet, attached
dev: VGA, id ""
vgamem_mb = 16 (0x10)
mmio = true
qemu-extended-regs = true
edid = true
xres = 1280 (0x500)
yres = 800 (0x320)
xmax = 0 (0x0)
ymax = 0 (0x0)
refresh_rate = 0 (0x0)
global-vmstate = false
addr = 01.0
romfile = "vgabios-stdvga.bin"
romsize = 65536 (0x10000)
rombar = 1 (0x1)
multifunction = false
x-pcie-lnksta-dllla = true
x-pcie-extcap-init = true
failover_pair_id = ""
acpi-index = 0 (0x0)
class VGA controller, addr 00:01.0, pci id 1234:1111 (sub 1af4:1100)
bar 0: mem at 0xfc000000 [0xfcffffff]
bar 2: mem at 0xfea14000 [0xfea14fff]
bar 6: mem at 0xffffffffffffffff [0xfffe]
dev: ICH9-SMB, id ""
addr = 1f.3
romfile = ""
romsize = 4294967295 (0xffffffff)
rombar = 1 (0x1)
multifunction = true
x-pcie-lnksta-dllla = true
x-pcie-extcap-init = true
failover_pair_id = ""
acpi-index = 0 (0x0)
class SMBus, addr 00:1f.3, pci id 8086:2930 (sub 1af4:1100)
bar 4: i/o at 0x700 [0x73f]
bus: i2c
type i2c-bus
dev: smbus-eeprom, id ""
address = 87 (0x57)
dev: smbus-eeprom, id ""
address = 86 (0x56)
dev: smbus-eeprom, id ""
address = 85 (0x55)
dev: smbus-eeprom, id ""
address = 84 (0x54)
dev: smbus-eeprom, id ""
address = 83 (0x53)
dev: smbus-eeprom, id ""
address = 82 (0x52)
dev: smbus-eeprom, id ""
address = 81 (0x51)
dev: smbus-eeprom, id ""
address = 80 (0x50)
dev: ICH9-LPC, id ""
gpio-out "gsi" 24
noreboot = true
smm-compat = false
x-smi-broadcast = true
x-smi-cpu-hotplug = true
x-smi-cpu-hotunplug = true
addr = 1f.0
romfile = ""
romsize = 4294967295 (0xffffffff)
rombar = 1 (0x1)
multifunction = true
x-pcie-lnksta-dllla = true
x-pcie-extcap-init = true
failover_pair_id = ""
acpi-index = 0 (0x0)
class ISA bridge, addr 00:1f.0, pci id 8086:2918 (sub 1af4:1100)
bus: isa.0
type ISA
dev: isa-debugcon, id ""
iobase = 1026 (0x402)
chardev = "debugcon"
readback = 233 (0xe9)
dev: isa-serial, id "serial0"
index = 0 (0x0)
iobase = 1016 (0x3f8)
irq = 4 (0x4)
dev: pvpanic, id ""
ioport = 1285 (0x505)
events = 3 (0x3)
dev: port92, id ""
gpio-out "a20" 1
dev: vmmouse, id ""
dev: vmport, id ""
x-read-set-eax = true
x-signal-unsupported-cmd = true
x-report-vmx-type = true
x-cmds-v2 = true
vmware-vmx-version = 6 (0x6)
vmware-vmx-type = 2 (0x2)
dev: i8042, id ""
gpio-in "ps2-mouse-input-irq" 1
gpio-in "ps2-kbd-input-irq" 1
gpio-out "" 2
gpio-out "a20" 1
extended-state = true
kbd-throttle = false
kbd-irq = 1 (0x1)
mouse-irq = 12 (0xc)
dev: i8257, id ""
base = 192 (0xc0)
page-base = 136 (0x88)
pageh-base = -1 (0xffffffffffffffff)
dshift = 1 (0x1)
dev: i8257, id ""
base = 0 (0x0)
page-base = 128 (0x80)
pageh-base = -1 (0xffffffffffffffff)
dshift = 0 (0x0)
dev: isa-pcspk, id ""
audiodev = ""
iobase = 97 (0x61)
migrate = true
dev: kvm-pit, id ""
gpio-in "" 1
iobase = 64 (0x40)
lost_tick_policy = "delay"
dev: mc146818rtc, id ""
gpio-out "" 1
base_year = 0 (0x0)
iobase = 112 (0x70)
irq = 8 (0x8)
lost_tick_policy = "discard"
dev: kvm-i8259, id ""
iobase = 160 (0xa0)
elcr_addr = 1233 (0x4d1)
elcr_mask = 222 (0xde)
master = false
dev: kvm-i8259, id ""
iobase = 32 (0x20)
elcr_addr = 1232 (0x4d0)
elcr_mask = 248 (0xf8)
master = true
dev: mch, id ""
extended-tseg-mbytes = 16 (0x10)
smbase-smram = true
addr = 00.0
romfile = ""
romsize = 4294967295 (0xffffffff)
rombar = 1 (0x1)
multifunction = false
x-pcie-lnksta-dllla = true
x-pcie-extcap-init = true
failover_pair_id = ""
acpi-index = 0 (0x0)
class Host bridge, addr 00:00.0, pci id 8086:29c0 (sub 1af4:1100)
dev: fw_cfg_io, id ""
dma_enabled = true
x-file-slots = 32 (0x20)
acpi-mr-restore = true
dev: kvmclock, id ""
x-mach-use-reliable-get-clock = true
dev: kvmvapic, id ""
(qemu) info pci
Bus 0, device 0, function 0:
Host bridge: PCI device 8086:29c0
PCI subsystem 1af4:1100
id ""
Bus 0, device 1, function 0:
VGA controller: PCI device 1234:1111
PCI subsystem 1af4:1100
BAR0: 32 bit prefetchable memory at 0xfc000000 [0xfcffffff].
BAR2: 32 bit memory at 0xfea14000 [0xfea14fff].
BAR6: 32 bit memory at 0xffffffffffffffff [0x0000fffe].
id ""
Bus 0, device 2, function 0:
USB controller: PCI device 1b36:000d
PCI subsystem 1af4:1100
IRQ 11, pin A
BAR0: 64 bit memory at 0xfea10000 [0xfea13fff].
id "usb0"
Bus 0, device 5, function 0:
PCI bridge: PCI device 1b36:000c
IRQ 10, pin A
BUS 0.
secondary bus 1.
subordinate bus 1.
IO range [0xf000, 0x0fff]
memory range [0xfe800000, 0xfe9fffff]
prefetchable memory range [0xfd600000, 0xfd7fffff]
BAR0: 32 bit memory at 0xfea15000 [0xfea15fff].
id "s0"
Bus 1, device 0, function 0:
SCSI controller: PCI device 1af4:1001
PCI subsystem 1af4:0002
IRQ 10, pin A
BAR0: I/O at 0x1000 [0x107f].
BAR1: 32 bit memory at 0xfe800000 [0xfe800fff].
BAR4: 64 bit prefetchable memory at 0xfd600000 [0xfd603fff].
id "vblk0"
Bus 0, device 5, function 1:
PCI bridge: PCI device 1b36:000c
IRQ 10, pin A
BUS 0.
secondary bus 2.
subordinate bus 2.
IO range [0xf000, 0x0fff]
memory range [0xfe600000, 0xfe7fffff]
prefetchable memory range [0xfd400000, 0xfd5fffff]
BAR0: 32 bit memory at 0xfea16000 [0xfea16fff].
id "s1"
Bus 2, device 0, function 0:
Ethernet controller: PCI device 1af4:1000
PCI subsystem 1af4:0001
IRQ 10, pin A
BAR0: I/O at 0x2000 [0x201f].
BAR1: 32 bit memory at 0xfe640000 [0xfe640fff].
BAR4: 64 bit prefetchable memory at 0xfd400000 [0xfd403fff].
BAR6: 32 bit memory at 0xffffffffffffffff [0x0003fffe].
id "net0"
Bus 0, device 5, function 2:
PCI bridge: PCI device 1b36:000c
IRQ 10, pin A
BUS 0.
secondary bus 3.
subordinate bus 3.
IO range [0xf000, 0x0fff]
memory range [0xfe400000, 0xfe5fffff]
prefetchable memory range [0xfd200000, 0xfd3fffff]
BAR0: 32 bit memory at 0xfea17000 [0xfea17fff].
id "s2"
Bus 3, device 4, function 0:
SCSI controller: PCI device 1af4:1001
PCI subsystem 1af4:0002
IRQ 0, pin A
BAR0: I/O at 0xffffffffffffffff [0x007e].
BAR1: 32 bit memory at 0xffffffffffffffff [0x00000ffe].
BAR4: 64 bit prefetchable memory at 0xffffffffffffffff [0x00003ffe].
id "vblk2"
Bus 0, device 5, function 3:
PCI bridge: PCI device 1b36:000c
IRQ 10, pin A
BUS 0.
secondary bus 4.
subordinate bus 4.
IO range [0xf000, 0x0fff]
memory range [0xfe200000, 0xfe3fffff]
prefetchable memory range [0xfd000000, 0xfd1fffff]
BAR0: 32 bit memory at 0xfea18000 [0xfea18fff].
id "s3"
Bus 0, device 31, function 0:
ISA bridge: PCI device 8086:2918
PCI subsystem 1af4:1100
id ""
Bus 0, device 31, function 3:
SMBus: PCI device 8086:2930
PCI subsystem 1af4:1100
IRQ 10, pin A
BAR4: I/O at 0x0700 [0x073f].
id ""
In the guest (Fedora 34):
[root@test ~]# lspci -tv
-[0000:00]-+-00.0 Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller
+-01.0 Device 1234:1111
+-02.0 Red Hat, Inc. QEMU XHCI Host Controller
+-05.0-[01]----00.0 Red Hat, Inc. Virtio block device
+-05.1-[02]----00.0 Red Hat, Inc. Virtio network device
+-05.2-[03]--
+-05.3-[04]--
+-1f.0 Intel Corporation 82801IB (ICH9) LPC Interface Controller
\-1f.3 Intel Corporation 82801I (ICH9 Family) SMBus Controller
Changing addr of the second disk from 4 to 0 makes it appear in the
guest.
What exactly do you find odd?
Thanks,
Roman.
- [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot, Roman Kagan, 2022/07/20
- Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot, Thomas Huth, 2022/07/20
- Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot, Daniel P . Berrangé, 2022/07/20
- Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot, Roman Kagan, 2022/07/20
- Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot, Mark Cave-Ayland, 2022/07/20
- Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot,
Roman Kagan <=
- Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot, Mark Cave-Ayland, 2022/07/21
- Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot, Daniel P . Berrangé, 2022/07/21
- Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot, Mark Cave-Ayland, 2022/07/21
- Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot, Roman Kagan, 2022/07/21
- Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot, Daniel P . Berrangé, 2022/07/21
- Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot, Thomas Huth, 2022/07/22
- Re: [PATCH v3] hw/pci/pci_bridge: ensure PCIe slots have only one slot, Mark Cave-Ayland, 2022/07/22