Hi! > [ Upstream commit 1d4df649cbb4b26d19bea38ecff4b65b10a1bbca ] > > The thead,c900-plic has been used in opensbi to distinguish > PLIC [1]. Although PLICs have the same behaviors in Linux, > they are different hardware with some custom initializing in > firmware(opensbi). > > Qute opensbi patch commit-msg by Samuel: > > The T-HEAD PLIC implementation requires setting a delegation bit > to allow access from S-mode. Now that the T-HEAD PLIC has its own > compatible string, set this bit automatically from the PLIC driver, > instead of reaching into the PLIC's MMIO space from another driver. > > [1]: https://github.com/riscv-software-src/opensbi/commit/78c2b19218bd62653b9fb31623a42ced45f38ea6 > The "thead,c900-plic" string is added into single place in the kernel. This means that a) it will probably not do anything useful in -stable kernels and b) it is certainly missing documentation etc. In mainline, string is documented in Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml Best regards, Pavel -- http://www.livejournal.com/~pavelmachek
Attachment:
signature.asc
Description: Digital signature
