Messages in this thread | | | Date | Wed, 5 Apr 2023 13:57:16 +0000 (UTC) | From | Paul Walmsley <> | Subject | Re: [PATCH v5 2/6] RISC-V: Add a syscall for HW probing |
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On Mon, 27 Mar 2023, Evan Green wrote:
> We don't have enough space for these all in ELF_HWCAP{,2} and there's no > system call that quite does this, so let's just provide an arch-specific > one to probe for hardware capabilities. This currently just provides > m{arch,imp,vendor}id, but with the key-value pairs we can pass more in > the future. > > Co-developed-by: Palmer Dabbelt <palmer@rivosinc.com> > Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> > Signed-off-by: Evan Green <evan@rivosinc.com> > Reviewed-by: Conor Dooley <conor.dooley@microchip.com> > Reviewed-by: Heiko Stuebner <heiko.stuebner@vrull.eu> > Tested-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
Folks are already building RISC-V systems with cores that have different feature sets inside the same Linux system image - just like some ARM vendors are - so it makes sense to pass this information onto userspace.
By the way, Evan, did you intend to update the copyright dates to include 2023?
Beyond that,
Reviewed-by: Paul Walmsley <paul.walmsley@sifive.com>
- Paul
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