On Thu, Jul 23, 2026 at 03:18:55PM -0700, Yanjun.Zhu wrote: > > On 7/20/26 10:08 AM, Vipin Sharma wrote: > > On Thu, Jul 16, 2026 at 06:22:07PM -0700, Yanjun.Zhu wrote: > > > On 7/16/26 4:24 PM, Yanjun.Zhu wrote: > > > > > > > > On 7/14/26 8:14 AM, Vipin Sharma wrote: > > > > > Testing > > > > > ------- > > > > > > > > > > Tested using VFIO Live Update selftests in both QEMU and bare-metal > > > > > environment (Intel DSA PCIe device). > > > > I want to make tests VFIO Live Update selftests in QEMU. But how to > > > > select a PCIe device? > > > > > > > > what device do the PCI ID 0000:00:04.0 and 0000:6a:01.0 mean in the > > > > following testcase? > > Sorry, this was my copy-paste mistake when combining things from both > > qemu and baremetal. You only need one device not two separate ones. > > > > For testing using QEMU, you can use QEMU PCI test device. > > > > -device pci-testdev > > > > In VM, use `lspci` command to find the BDF of the PCI device. It will show > > output like: > > > > 00:04.0 Unclassified device [00ff]: Red Hat, Inc. QEMU PCI Test Device > > > > Then prefix the domain (generally, 0000) to the BDF and use the testing > > commands. > > > > `0000:6a:01.0` was the BDF of the Intel DSA device on my host. I > > incorrectly mixed two devices during my copy-paste. > > > > Limitation of qemu pci-testdev is that it does not have the DMA > > capability. I used physical host with Intel DSA to verify that the > > device performing DMA during live update gets reset. > > > > > In my qemu, > > > > > > 00:04.0 System peripheral: InnoTek Systemberatung GmbH VirtualBox Guest > > > Service > > > 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- > > > Interrupt: pin A routed to IRQ 20 > > > Region 0: I/O ports at d040 [size=32] > > > Region 1: Memory at f0400000 (32-bit, non-prefetchable) [size=4M] > > > Region 2: Memory at f0800000 (32-bit, prefetchable) [size=16K] > > > Kernel driver in use: vboxguest > > > Kernel modules: vboxguest > > > > > > I am wondering if the above pci device can work well with this patch set > > > or > > > not. > > I think you should be able to test Live Update with any PCI device which > > can be attached vfio-pci driver. > > > > `vfio_pci_liveupdate_kexec_test` will initiate DMA if the VFIO selftest > > framework has the driver for the passed device (Intel DSA) otherwise it > > will just skip over the DMA flow and do the remaining things. > > Thanks a lot. I'll run some tests with QEMU's `pci-testdev`. > > If I understand correctly, when using `pci-testdev`, only the DMA test case > is expected not to work, while all the other test cases should work > correctly. >
Yes, other test cases should work.
