From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Rob Herring <robh@kernel.org>
Cc: James Morse <james.morse@arm.com>,
Jeremy Linton <jeremy.linton@arm.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Sudeep Holla <sudeep.holla@arm.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Len Brown <lenb@kernel.org>,
devicetree@vger.kernel.org, linux-acpi@vger.kernel.org
Subject: Re: [PATCH 0/6] cacheinfo: CPU affinity and Devicetree 'id' support
Date: Tue, 21 Dec 2021 10:31:22 +0100 [thread overview]
Message-ID: <YcGe6prlqTknbYj6@kroah.com> (raw)
In-Reply-To: <20211216233125.1130793-1-robh@kernel.org>
On Thu, Dec 16, 2021 at 05:31:19PM -0600, Rob Herring wrote:
> For upcoming Arm MPAM support in resctrl, it is necessary to have the
> cacheinfo 'id' for MPAM enabled caches. The 'id' is part of the resctrl
> ABI. While this support already exists for ACPI based systems, it is
> missing for DT. This series adds the support.
>
> The 'id' value used is the smallest CPU h/w id value associated with a
> cache. This requires walking the cache hierarchy from every CPU node to
> get all CPUs associated with a cache. As MPAM also needs to know this,
> the CPU affinity is also saved to avoid reimplementing and walking the
> firmware tables again.
>
> Patches 1 and 2 are v2 from the prior series[1]. The rest are new.
>
> Tested on arm64 with DT. ACPI changes are untested. I don't have a
> system with an appropriate PPTT nor do I know how to modify ACPI tables.
>
> Rob
>
> [1] https://lore.kernel.org/all/20211006164332.1981454-1-robh@kernel.org/
>
> Rob Herring (6):
> cacheinfo: Allow for >32-bit cache 'id'
> cacheinfo: Set cache 'id' based on DT data
> cacheinfo: Add cpu_affinity_map to store affinity for all CPUs
> ACPI / PPTT: Populate the cacheinfo.cpu_affinity_map
> cacheinfo: Use cpu_affinity_map for populating shared_cpu_map
> cacheinfo: Add cacheinfo_get_cache_affinity() function
>
> drivers/acpi/pptt.c | 29 +++++++++++++++--
> drivers/base/cacheinfo.c | 65 ++++++++++++++++++++++++++-------------
> include/linux/cacheinfo.h | 29 +++++++++++++++--
> 3 files changed, 97 insertions(+), 26 deletions(-)
>
> --
> 2.32.0
>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
prev parent reply other threads:[~2021-12-21 9:31 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-16 23:31 [PATCH 0/6] cacheinfo: CPU affinity and Devicetree 'id' support Rob Herring
2021-12-16 23:31 ` [PATCH 1/6] cacheinfo: Allow for >32-bit cache 'id' Rob Herring
2021-12-16 23:31 ` [PATCH 2/6] cacheinfo: Set cache 'id' based on DT data Rob Herring
2021-12-17 16:57 ` Robin Murphy
2021-12-17 18:14 ` Rob Herring
2021-12-17 19:03 ` Sudeep Holla
2021-12-17 19:08 ` Sudeep Holla
2021-12-17 19:26 ` Rob Herring
2021-12-17 20:28 ` Jeremy Linton
2021-12-17 19:08 ` Robin Murphy
2021-12-17 19:35 ` Rob Herring
2021-12-17 20:22 ` Jeremy Linton
2021-12-17 21:13 ` Robin Murphy
2021-12-16 23:31 ` [PATCH 3/6] cacheinfo: Add cpu_affinity_map to store affinity for all CPUs Rob Herring
2021-12-16 23:31 ` [PATCH 4/6] ACPI / PPTT: Populate the cacheinfo.cpu_affinity_map Rob Herring
2021-12-16 23:31 ` [PATCH 5/6] cacheinfo: Use cpu_affinity_map for populating shared_cpu_map Rob Herring
2021-12-16 23:31 ` [PATCH 6/6] cacheinfo: Add cacheinfo_get_cache_affinity() function Rob Herring
2021-12-21 9:31 ` Greg Kroah-Hartman [this message]
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