linux-kernel - Re: [PATCH v8 11/13] arm64: topology: enable ACPI/PPTT based CPU topology

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Date:   Tue, 1 May 2018 15:46:22 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     Jeremy Linton <jeremy.linton@....com>, linux-acpi@...r.kernel.org
Cc:     Sudeep Holla <sudeep.holla@....com>,
        linux-arm-kernel@...ts.infradead.org, Lorenzo.Pieralisi@....com,
        hanjun.guo@...aro.org, rjw@...ysocki.net, Will.Deacon@....com,
        Catalin.Marinas@....com, gregkh@...uxfoundation.org,
        Mark.Rutland@....com, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org, wangxiongfeng2@...wei.com,
        vkilari@...eaurora.org, ahs3@...hat.com, Dietmar.Eggemann@....com,
        Morten.Rasmussen@....com, palmer@...ive.com, lenb@...nel.org,
        john.garry@...wei.com, austinwc@...eaurora.org,
        tnowicki@...iumnetworks.com, jhugo@....qualcomm.com,
        timur@....qualcomm.com, ard.biesheuvel@...aro.org
Subject: Re: [PATCH v8 11/13] arm64: topology: enable ACPI/PPTT based CPU
 topology



On 26/04/18 00:31, Jeremy Linton wrote:
> Propagate the topology information from the PPTT tree to the
> cpu_topology array. We can get the thread id and core_id by assuming
> certain levels of the PPTT tree correspond to those concepts.
> The package_id is flagged in the tree and can be found by calling
> find_acpi_cpu_topology_package() which terminates
> its search when it finds an ACPI node flagged as the physical
> package. If the tree doesn't contain enough levels to represent
> all of the requested levels then the root node will be returned
> for all subsequent levels.
> 

Acked-by: Sudeep Holla <sudeep.holla@....com>

[..]

> @@ -304,6 +345,8 @@ void __init init_cpu_topology(void)
>  	 * Discard anything that was parsed if we hit an error so we
>  	 * don't use partial information.
>  	 */
> -	if (of_have_populated_dt() && parse_dt_topology())
> +	if ((!acpi_disabled) && parse_acpi_topology())

[nit] not sure if extra () is need above, but I am fine either way.

-- 
Regards,
Sudeep