On 2017-04-27 17:31, Henning Schild wrote: > Am Thu, 27 Apr 2017 07:44:56 -0700 > schrieb jonas <jo...@retotech.se>: > >>>> Hi, >>>> Thanks for the reply. >>>> So as you said, >>>> 1)I've augmented the jetson-tk1-demo.c config with an ivshmem >>>> device and a shared mem region, using to >>>> configs/jetson-tk1-linux-demo.c as reference. >>>> >>>> 2)I replicated the ivshmem-demo from x86 to inmates/demos/arm and >>>> hooked it up in the Makefile I tried to cross compile the same >>>> and I have encountered a few errors. From what I've observed, the >>>> errors are mainly regarding the pci related functions. How can I >>>> proceed with this? PFA the error log. >>> >>> As Jan said, you will have to move the pci library into the ARM >>> inmate as well. You will basically need a version of >>> inmates/lib/x86/pci.c that uses mmio instead of pio. So you will >>> have to change the two functions pci_(read|write)_config to use >>> mmio. >>> >>> Henning >>> >> >> Hi, >> >> I'm also experimenting with ivshmem between the root-cell and a bare >> metal cell. In my case, however, on BananaPi M1. >> >> Could you elaborate on modifying the functions >> pci_(read|write)_config to use mmio instead of pio? >> >> I guess it's a matter of accessing the appropriate memory mapped PCI >> configuration space of the (virtual) PCI devices available to the >> guest/inmate instead of accessing PCI_REG_ADDR_PORT and >> PCI_REG_DATA_PORT using functions(out|in)[bwl]? > > Exactly mmio = memory mapped IO, pio = port IO (in|out). The outs and > ins will not work, instead the whole config space will be in physical > memory. The location can be found in the root-cell configuration > .pci_mmconfig_base.
And as this base address is different for each board, and we do not have a device tree parser in our inmate library yet, I would suggest to make this value an inmate command line parameter for now. Jan > Some more information can be found here. > http://wiki.osdev.org/PCI > > The method currently implemented is called method #1 on that wiki. Make > sure to keep your access aligned with the size that is requested. > > Code that is similar to what you will need can be found in the > hypervisor. hypervisor/pci.c include/jailhouse/mmio.h > > Henning > > >> Best regards - Jonas Weståker >> > -- Siemens AG, Corporate Technology, CT RDA ITP SES-DE Corporate Competence Center Embedded Linux -- 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. For more options, visit https://groups.google.com/d/optout.
