I see PPC is defined in target/ppc/Kconfig so I think these mark the target not the host. Vfio-pci works with qemu-system-ppc
Ah ! I am surprised. Which host and QEMU machine please ?
I've seen people do this on x86_64 host with pegasos2, amigaone and mac99
running 32 bit guests (AmigaOS and MacOS). Some people running older 32 bit
Windows versions on pc machine might also use this.
I tried with :
qemu-system-ppc -m 1G -smp 1 -M mac99,via=pmu -cpu g4 ....
There are some errors/warnings:
qemu-system-ppc: -device vfio-pci,host=0000:0c:00.0: warning: MSI-X is not
supported by interrupt controller
Cannot manage 'ethernet controller' PCI device type 'network':
>>
>> 8086 10c9 (2 0 0)
>> set_property: NULL phandle
>> =============================================================
>> OpenBIOS 1.1 [Sep 24 2024 19:56]
...
but it does work :
root@debian-powerpc:~# uname -a
Linux debian-powerpc 6.1.0-7-powerpc #1 Debian 6.1.20-1 (2023-03-19) ppc
GNU/Linux
root@debian-powerpc:~# lspci -s 00:10.0 -vv
00:10.0 Ethernet controller: Intel Corporation 82576 Gigabit Network
Connection (rev 01)
Subsystem: Beijing Sinead Technology Co., Ltd. 82576 Gigabit Network
Connection
Device tree node:
/sys/firmware/devicetree/base/pci@f2000000/pci8086,10c9@10
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+
Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 27
Region 0: Memory at 82080000 (32-bit, non-prefetchable) [size=128K]
Region 1: Memory at 82400000 (32-bit, non-prefetchable) [size=4M]
Region 2: I/O ports at 1080 [size=32]
Region 3: Memory at 82800000 (32-bit, non-prefetchable) [size=16K]
Expansion ROM at 82c00000 [disabled] [size=4M]
Capabilities: [40] Power Management version 3
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=1 PME-
Capabilities: [a0] Express (v2) Endpoint, MSI 00
DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <512ns, L1
<64us
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+
SlotPowerLimit 0W
DevCtl: CorrErr- NonFatalErr- FatalErr+ UnsupReq-
RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ FLReset-
MaxPayload 256 bytes, MaxReadReq 512 bytes
DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr+
TransPend-
LnkCap: Port #0, Speed 2.5GT/s, Width x4, ASPM L0s L1, Exit Latency
L0s <4us, L1 <64us
ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp-
LnkCtl: ASPM L1 Enabled; RCB 64 bytes, Disabled- CommClk+
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s, Width x1 (downgraded)
TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Range ABCD, TimeoutDis+ NROPrPrP-
LTR-
10BitTagComp- 10BitTagReq- OBFF Not Supported, ExtFmt-
EETLPPrefix-
EmergencyPowerReduction Not Supported,
EmergencyPowerReductionInit-
FRS- TPHComp- ExtTPHComp-
AtomicOpsCap: 32bit- 64bit- 128bitCAS-
DevCtl2: Completion Timeout: 16ms to 55ms, TimeoutDis- LTR-
10BitTagReq- OBFF Disabled,
AtomicOpsCtl: ReqEn-
LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-
EqualizationPhase1-
EqualizationPhase2- EqualizationPhase3-
LinkEqualizationRequest-
Retimer- 2Retimers- CrosslinkRes: unsupported
Kernel driver in use: igb
Kernel modules: igb
root@debian-powerpc:~# ip link show dev enp0s16
2: enp0s16: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP
mode DEFAULT group default qlen 1000
link/ether 80:61:5f:0a:2f:c4 brd ff:ff:ff:ff:ff:ff
The number of VFIO combinations drives me nuts. It's worse than PPC.
Thanks,
C.
