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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On 08/08/2022 22:34, Jessica Clarke wrote: > On Fri, Aug 05, 2022 at 05:28:42PM +0100, Conor Dooley wrote: >> From: Conor Dooley >> >> The device trees produced automatically for the virt and spike machines >> fail dt-validate on several grounds. Some of these need to be fixed in >> the linux kernel's dt-bindings, but others are caused by bugs in QEMU. >> >> Patches been sent that fix the QEMU issues [0], but a couple of them >> need to be fixed in the kernel's dt-bindings. The first patches add >> compatibles for "riscv,{clint,plic}0" which are present in drivers and >> the auto generated QEMU dtbs. > > IMO the correct thing is to have QEMU use a qemu,plicX rather than to > weaken the requirement that a non-generic compatible be used. Otherwise > you end up with QEMU using something that's marked as deprecated and > either the warning remains and annoys people still or it becomes too > weak and people ignore it when creating real hardware. It's already in a driver so I figure it should be in the bindings too. In arm's virt.c they use the generic gic compatible & I don't see any evidence of other archs using "qemu,foo" bindings. I suppose there's always the option of just removing the "riscv,plic0" from the riscv's virt.c > >> The final patch adds some new ISA strings >> which needs scruitiny from someone with more knowledge about what ISA >> extension strings should be reported in a dt than I have. > > Listing every possible ISA string supported by the Linux kernel really > is not going to scale... Yeah, totally correct there. Case for adding a regex I suppose, but I am not sure how to go about handling the multi-letter extensions or if parsing them is required from a binding compliance point of view. Hoping for some input from Palmer really. Thanks, Conor. _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv