linux-kernel - Re: [PATCH v5 0/2] cacheinfo support to read no. of L2 cache ways enabled

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Message-ID: <mhng-2f2a1b1f-278b-4062-82cd-750b4e9f3d55@palmerdabbelt-glaptop1>
Date:   Wed, 20 May 2020 15:19:58 -0700 (PDT)
From:   Palmer Dabbelt <palmer@...belt.com>
To:     david.abdurachmanov@...il.com, yash.shah@...ive.com
CC:     Paul Walmsley <paul.walmsley@...ive.com>, aou@...s.berkeley.edu,
        anup@...infault.org, Greg KH <gregkh@...uxfoundation.org>,
        alexios.zavras@...el.com, tglx@...utronix.de, bp@...e.de,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        sachin.ghadi@...ive.com, yash.shah@...ive.com
Subject:     Re: [PATCH v5 0/2] cacheinfo support to read no. of L2 cache ways enabled

On Wed, 19 Feb 2020 21:15:17 PST (-0800), yash.shah@...ive.com wrote:
> The patchset includes 2 patches. Patch 1 implements cache_get_priv_group
> which make use of a generic ops structure to return a private attribute
> group for custom cacheinfo. Patch 2 implements a private attribute named
> "number_of_ways_enabled" in the cacheinfo framework. Reading this
> attribute returns the number of L2 cache ways enabled at runtime,
>
> This patchset is based on Linux v5.6-rc2 and tested on HiFive Unleashed
> board.
>
> v5:
> - Since WayEnable is 8bits, mask out and return only the last 8 bit in
>   l2_largest_wayenabled()
> - Rebased on Linux v5.6-rc2
>
> v4:
> - Rename "sifive_l2_largest_wayenabled" to "l2_largest_wayenabled" and
>   make it a static function
>
> v3:
> - As per Anup Patel's suggestion[0], implement a new approach which uses
>   generic ops structure. Hence addition of patch 1 to this series and
>   corresponding changes to patch 2.
> - Dropped "riscv: dts: Add DT support for SiFive L2 cache controller"
>   patch since it is already merged
> - Rebased on Linux v5.5-rc6
>
> Changes in v2:
> - Rebase the series on v5.5-rc3
> - Remove the reserved-memory node from DT
>
> [0]: https://lore.kernel.org/linux-riscv/CAAhSdy0CXde5s_ya=4YvmA4UQ5f5gLU-Z_FaOr8LPni+s_615Q@mail.gmail.com/
>
> Yash Shah (2):
>   riscv: cacheinfo: Implement cache_get_priv_group with a generic ops
>     structure
>   riscv: Add support to determine no. of L2 cache way enabled
>
>  arch/riscv/include/asm/cacheinfo.h   | 15 ++++++++++++++
>  arch/riscv/kernel/cacheinfo.c        | 17 ++++++++++++++++
>  drivers/soc/sifive/sifive_l2_cache.c | 38 ++++++++++++++++++++++++++++++++++++
>  3 files changed, 70 insertions(+)
>  create mode 100644 arch/riscv/include/asm/cacheinfo.h

I must have lost track of this one, it's on for-next now.  Thanks to David for
reminding me.