On 8/19/20 1:31 PM, Jakub Lužný wrote: > On Wed, 19 Aug 2020 at 13:03, Christoph Gerum > <christoph.ge...@uni-tuebingen.de > <mailto:christoph.ge...@uni-tuebingen.de>> wrote: > > > During our work on autojail we also had the assumption that > .pci_mmconfig_base needed to be below 2^32, but we could not find a > reason for that in jailhouse. I was think, that this restriction was > either caused by the linux driver or a misconfigured device tree. > But I > will revisit the problem in the next days. > > > I have been looking into that and the device tree generated by > Jailhouse might be the issue. When I move the .pci_mmconfig_base to > 0x200000000, the generated device tree looked like this: > > pci@0 { > dma-coherent; > #interrupt-cells = <0x01>; > interrupt-map-mask = <0x00 0x00 0x00 0x07>; > ranges = <0x2000000 0x02 0x100000 0x02 0x100000 0x00 0x4000>; > compatible = "pci-host-ecam-generic"; > device_type = "pci"; > status = "ok"; > #size-cells = <0x02>; > bus-range = <0x00 0x00>; > #address-cells = <0x03>; > reg = <0x02 0x00 0x100000>; > linux,pci-domain = <0x01>; > interrupt-map = <0x00 0x00 0x00 0x01 0x01 0x00 0x96 0x01 0x00 > 0x00 0x00 0x02 0x01 0x00 0x97 0x01 0x00 0x00 0x00 0x03 0x01 0x00 0x98 > 0x01 0x00 0x00 0x00 0x04 0x01 0x00 0x99 0x01>; > }; > > At first, according to [1], the #address-cells must be 3 and > #size-cells must be 2. In Jailhouse, this is taken from the parent > node. I don't know if that might be an issue. > > But it's weird that the reg property is just 3x 32bits. According to > the Jailhouse code at [2], I would expect it to be 5x 32bits long. > Doesn't the kernel think that the size is 0x10000000000000 or > something similar?
That is correct, reg property is defined by the #address and #size-cells of the parent node which are 2 and 1 in this case. But one needs to change the reg and ranges properties in the inmate .dts as well. At least i think, I forgot the ranges last time I tried. Christoph -- You received this message because you are subscribed to the Google Groups "Jailhouse" group. To unsubscribe from this group and stop receiving emails from it, send an email to jailhouse-dev+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jailhouse-dev/07e0e959-4d93-58aa-4720-356d3bd7066e%40uni-tuebingen.de.
