On Wed, Nov 21, 2018 at 1:37 PM Palmer Dabbelt <pal...@sifive.com> wrote: > > On Wed, 21 Nov 2018 11:21:40 PST (-0800), alistai...@gmail.com wrote: > > On Wed, Nov 21, 2018 at 11:19 AM Logan Gunthorpe <log...@deltatee.com> > > wrote: > >> > >> > >> > >> On 2018-11-21 12:16 p.m., Alistair Francis wrote: > >> >>> Do you see the MicroSemi PCIe probe in your dmesg? > >> >> > >> >> I do when I have a kernel with microsemi PCI Support (specifically the > >> >> one included in the bbl you sent us a while back). > >> > > >> > Yeah, so you need to make sure that doesn't happen. > >> > >> Well, I also have a kernel (one I've built myself) without microsemi > >> support, but with Xilinx support and it also doesn't work (see my dmesg > >> logs I sent). > > > > So this one should work. > > > >> > >> > For people who have modified the standard bbl to edit the device tree > >> > before passing it to Linux to add the MicroSemi PCIe node, it won't > >> > work. That's a very small number of people who have modified the > >> > standard boot loader. I don't think we need to document how those > >> > people get back to the default set-up. > >> > >> I have not done that. And it's not working for me. > > > > If you haven't done this then how can Linux know to probe the > > MicroSemi PCIe root complex? > > BBL passes this through from the FSBL, which has the DTB compiled in: > > https://github.com/sifive/freedom-u540-c000-bootloader/blob/master/fsbl/ux00_fsbl.dts#L405
That's fairly new though. Our boards show a Xilinx PCIe device. Alistair
