lkml.org 
[lkml]   [2023]   [Apr]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v5 2/6] RISC-V: Add a syscall for HW probing
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

\
 
 \ /
  Last update: 2023-04-05 15:57    [W:0.107 / U:0.712 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site