On 18/06/2019 22:15, Michael Ellerman wrote: > Alexey Kardashevskiy <aik@xxxxxxxxx> writes: >> The pseries platform uses the PCI_PROBE_DEVTREE method of PCI probing >> which is basically reading "assigned-addresses" of every PCI device. >> However if the property is missing or zero sized, then there is >> no fallback of any kind and the PCI resources remain undiscovered, i.e. >> pdev->resource[] array is empty. >> >> This adds a fallback which parses the "reg" property in pretty much same >> way except it marks resources as "unset" which later makes Linux assign >> those resources with proper addresses. > > What happens under PowerVM is the big question. > > ie. if we see such a device under PowerVM and then do our own assignment > what happens? I'd be surprised not to see at least one "assigned-addresses" under powervm, and a single assigned bar will do the old behavior. I guess I could make it depend on "linux,pci-probe-only" (which I will need for this to work anyway), if that helps, should I? -- Alexey
