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Date:   Tue, 11 Dec 2018 20:18:04 -0600
From:   Rob Herring <robh@kernel.org>
To:     Atish Patra <atish.patra@wdc.com>
Cc:     linux-kernel@vger.kernel.org, Sudeep Holla <sudeep.holla@arm.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Anup Patel <anup@brainfault.org>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        Atish Patra <atish.patra@wdc.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        devicetree@vger.kernel.org,
        Dmitriy Cherkasov <dmitriy@oss-tech.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Ingo Molnar <mingo@kernel.org>,
        Jeremy Linton <jeremy.linton@arm.com>,
        Juri Lelli <juri.lelli@arm.com>,
        "moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)" 
        <linux-arm-kernel@lists.infradead.org>,
        linux-riscv@lists.infradead.org,
        Mark Rutland <mark.rutland@arm.com>,
        Morten Rasmussen <morten.rasmussen@arm.com>,
        Palmer Dabbelt <palmer@sifive.com>,
        "Peter Zijlstra (Intel)" <peterz@infradead.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Will Deacon <will.deacon@arm.com>
Subject: Re: [RFT PATCH v1 1/4] Documentation: DT: arm: add support for
 sockets defining package boundaries
Message-ID: <20181212021804.GA13998@bogus>
References: <1543534100-3654-1-git-send-email-atish.patra@wdc.com>
 <1543534100-3654-2-git-send-email-atish.patra@wdc.com>
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On Thu, 29 Nov 2018 15:28:17 -0800, Atish Patra wrote:
> From: Sudeep Holla <sudeep.holla@arm.com>
> 
> The current ARM DT topology description provides the operating system
> with a topological view of the system that is based on leaf nodes
> representing either cores or threads (in an SMT system) and a
> hierarchical set of cluster nodes that creates a hierarchical topology
> view of how those cores and threads are grouped.
> 
> However this hierarchical representation of clusters does not allow to
> describe what topology level actually represents the physical package or
> the socket boundary, which is a key piece of information to be used by
> an operating system to optimize resource allocation and scheduling.
> 
> Lets add a new "socket" node type in the cpu-map node to describe the
> same.
> 
> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
> ---
>  Documentation/devicetree/bindings/arm/topology.txt | 52 ++++++++++++++++------
>  1 file changed, 39 insertions(+), 13 deletions(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>