On Mon, Dec 23, 2019 at 04:58:26PM +0100, Ard Biesheuvel wrote: > On Mon, 23 Dec 2019 at 16:46, Arvind Sankar <nivedita@xxxxxxxxxxxx> wrote: > > > > On Mon, Dec 23, 2019 at 03:02:40PM +0100, Ard Biesheuvel wrote: > > > > > > Practically, on PCIe systems, PCI/PCI bridges are the only thing we > > > need to care about, since that is how PCIe root ports are modelled. > > > > If I'm interpreting my lspci output correctly, I have a PCI/ISA bridge > > on bus 0 that's not behind a PCI/PCI bridge. Device 1f.0 below is the > > PCI/ISA bridge. > > Yeah, this is the LPC controller, right? What devices are actually on > that bus that are not closely tied to the chipset? > AFAICT it's my BMC's IPMI interface and some sort of watchdog I think -- don't have drivers but there are three other ACPI PNP* nodes under there as well.
