Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v6.19.11 2021-08-26T20:28:03+00:00 2021-08-26T20:28:03+00:00 Johannes Berg johannes.berg@intel.com 2021-08-17T15:53:29+00:00 urn:sha1:6a241d2923c2c0f6893c78c79421ceb3935691fd The identifier names in the documentation here didn't match the real ones, and the reserved was missing. Fix that. Reported-by: Bjorn Helgaas <helgaas@kernel.org> Fixes: 68f5d3f3b654 ("um: add PCI over virtio emulation driver") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at> 2021-06-17T19:45:43+00:00 Johannes Berg johannes.berg@intel.com 2021-03-05T12:19:58+00:00 urn:sha1:68f5d3f3b6543266b29e047cfaf9842333019b4c To support testing of PCI/PCIe drivers in UML, add a PCI bus support driver. This driver uses virtio, which in UML is really just vhost-user, to talk to devices, and adds the devices to the virtual PCI bus in the system. Since virtio already allows DMA/bus mastering this really isn't all that hard, of course we need the logic_iomem infrastructure that was added by a previous patch. The protocol to talk to the device is has a few fairly simple messages for reading to/writing from config and IO spaces, and messages for the device to send the various interrupts (INT#, MSI/MSI-X and while suspended PME#). Note that currently no offical virtio device ID is assigned for this protocol, as a consequence this patch requires defining it in the Kconfig, with a default that makes the driver refuse to work at all. Finally, in order to add support for MSI/MSI-X interrupts, some small changes are needed in the UML IRQ code, it needs to have more interrupts, changing NR_IRQS from 64 to 128 if this driver is enabled, but not actually use them for anything so that the generic IRQ domain/MSI infrastructure can allocate IRQ numbers. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>