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Tsirkin" Subject: Re: [GIT PULL] virtio: fixes, features Content-Type: text/plain X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: xiujianfeng@huawei.com, kvm@vger.kernel.org, alvaro.karsz@solid-run.com, linux-pci@vger.kernel.org, Jason Wang , linuxppc-dev@lists.ozlabs.org, wangdeming@inspur.com, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Netdev , angus.chen@jaguarmicro.com, Bjorn Helgaas , lingshan.zhu@intel.com, Linus Torvalds , gavinl@nvidia.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Thu, Oct 13, 2022, at 12:08 AM, Michael S. Tsirkin wrote: > On Wed, Oct 12, 2022 at 11:06:54PM +0200, Arnd Bergmann wrote: >> On Wed, Oct 12, 2022, at 7:22 PM, Linus Torvalds wrote: >> > >> > The NO_IRQ thing is mainly actually defined by a few drivers that just >> > never got converted to the proper world order, and even then you can >> > see the confusion (ie some drivers use "-1", others use "0", and yet >> > others use "((unsigned int)(-1)". >> >> The last time I looked at removing it for arch/arm/, one problem was >> that there were a number of platforms using IRQ 0 as a valid number. >> We have converted most of them in the meantime, leaving now only >> mach-rpc and mach-footbridge. For the other platforms, we just >> renumbered all interrupts to add one, but footbridge apparently >> relies on hardcoded ISA interrupts in device drivers. For rpc, >> it looks like IRQ 0 (printer) already wouldn't work, and it >> looks like there was never a driver referencing it either. > > Do these two boxes even have pci? Footbridge/netwinder has PCI and PC-style ISA on-board devices (floppy, ps2 mouse/keyboard, parport, soundblaster, ...), RiscPC has neither. Arnd