From: Easwar Hariharan <eahariha@xxxxxxxxxxxxxxxxxxx> Sent: Thursday, February 15, 2024 10:41 AM > > On 2/14/2024 3:22 PM, mhkelley58@xxxxxxxxx wrote: > > > > Add documentation topic for PCI pass-thru devices in Linux guests > > on Hyper-V and for the associated PCI controller driver (pci-hyperv.c). > > > > Signed-off-by: Michael Kelley <mhklinux@xxxxxxxxxxx> > > --- [snip] > > + > > +With this approach, the vPCI device is a VMBus device and a > > +PCI device at the same time. In response to the VMBus offer > > +message, the hv_pci_probe() function runs and establishes a > > +VMBus connection to the vPCI VSP on the Hyper-V host. That > > +connection has a single VMBus channel. The channel is used to > > +exchange messages with the vPCI VSP for the purpose of setting > > +up and configuring the vPCI device in Linux. Once the device > > +is fully configured in Linux as a PCI device, the VMBus > > +channel is used only if Linux changes the vCPU to be > > +interrupted in the guest, or > > > > ..............................if the vPCI device is removed by > > +the VM while the VM is running. > > This seems to conflict with the statement called out below. Did you > mean to say "if the vPCI device is removed *from* the VM..."? > Oops! Yes, that should be "from the VM". [snip] > > Otherwise, FWIW > > Reviewed-by: Easwar Hariharan <eahariha@xxxxxxxxxxxxxxxxxxx> > Thanks for reviewing and spotting that error. I'll see what other comments accumulate and then send out a v2 with updates. Michael
