Re: [RFC PATCH v2 2/2] soc: renesas: Add L2 cache management for RZ/Five SoC

[Arnd Bergmann]

On Tue, Oct 4, 2022, at 7:42 PM, Conor Dooley wrote:
> On Mon, Oct 03, 2022 at 11:32:22PM +0100, Prabhakar wrote:
>> 
>> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
>> ---
>>  arch/riscv/include/asm/cacheflush.h    |   8 +
>>  arch/riscv/include/asm/errata_list.h   |   2 +
>>  arch/riscv/include/asm/sbi.h           |   1 +
>>  arch/riscv/mm/dma-noncoherent.c        |  20 ++
>
> Stupid question maybe, but I assume you mixed the driver addition and
> the changes to arch/riscv for the sake of easily creating the RFC?
>
>>  drivers/soc/renesas/Makefile           |   4 +
>>  drivers/soc/renesas/rzf/Makefile       |   3 +
>>  drivers/soc/renesas/rzf/ax45mp_cache.c | 365 +++++++++++++++++++++++++
>>  drivers/soc/renesas/rzf/rzf_sbi.h      |  27 ++

My feeling is that L2 cache behavior should live in arch/riscv
rather than drivers/soc/, since this is not specific to a SoC
family but rather the CPU core. I would also expect that the
actual implementation and DT binding can be shared with
non-renesas SoCs using the same CPU core.


    Arnd