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From: Ionela Voinescu <ionela.voinescu@arm.com>
To: Sudeep Holla <sudeep.holla@arm.com>
Cc: linux-kernel@vger.kernel.org,
	Greg KH <gregkh@linuxfoundation.org>,
	Atish Patra <atishp@atishpatra.org>,
	Atish Patra <atishp@rivosinc.com>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Qing Wang <wangqing@vivo.com>, Rob Herring <robh+dt@kernel.org>,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	Pierre Gondois <pierre.gondois@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-riscv@lists.infradead.org
Subject: Re: [PATCH v4 15/20] arch_topology: Don't set cluster identifier as physical package identifier
Date: Mon, 27 Jun 2022 14:43:47 +0100	[thread overview]
Message-ID: <Yrm0E3mFHvJ5Nkgt@arm.com> (raw)
In-Reply-To: <20220621192034.3332546-16-sudeep.holla@arm.com>

On Tuesday 21 Jun 2022 at 20:20:29 (+0100), Sudeep Holla wrote:
> Currently as we parse the CPU topology from /cpu-map node from the
> device tree, we assign generated cluster count as the physical package
> identifier for each CPU which is wrong.
> 
> The device tree bindings for CPU topology supports sockets to infer
> the socket or physical package identifier for a given CPU. Since it is
> fairly new and not support on most of the old and existing systems, we
                     ^^^^^^^
Nit:		     supported
> can assume all such systems have single socket/physical package.
> 
> Fix the physical package identifier to 0 by removing the assignment of
> cluster identifier to the same.
> 
> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com>

Thanks,
Ionela.

> ---
>  drivers/base/arch_topology.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
> index 7a569aefe313..46fa1b70b02b 100644
> --- a/drivers/base/arch_topology.c
> +++ b/drivers/base/arch_topology.c
> @@ -549,7 +549,6 @@ static int __init parse_cluster(struct device_node *cluster, int depth)
>  	bool leaf = true;
>  	bool has_cores = false;
>  	struct device_node *c;
> -	static int package_id __initdata;
>  	int core_id = 0;
>  	int i, ret;
>  
> @@ -588,7 +587,7 @@ static int __init parse_cluster(struct device_node *cluster, int depth)
>  			}
>  
>  			if (leaf) {
> -				ret = parse_core(c, package_id, core_id++);
> +				ret = parse_core(c, 0, core_id++);
>  			} else {
>  				pr_err("%pOF: Non-leaf cluster with core %s\n",
>  				       cluster, name);
> @@ -605,9 +604,6 @@ static int __init parse_cluster(struct device_node *cluster, int depth)
>  	if (leaf && !has_cores)
>  		pr_warn("%pOF: empty cluster\n", cluster);
>  
> -	if (leaf)
> -		package_id++;
> -
>  	return 0;
>  }
>  
> -- 
> 2.36.1
> 

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  reply	other threads:[~2022-06-27 13:44 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-21 19:20 [PATCH v4 00/20] arch_topology: Updates to add socket support and fix cluster ids Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 01/20] ACPI: PPTT: Use table offset as fw_token instead of virtual address Sudeep Holla
2022-06-22 11:47   ` Rafael J. Wysocki
2022-06-27 13:41   ` Ionela Voinescu
2022-06-21 19:20 ` [PATCH v4 02/20] cacheinfo: Use of_cpu_device_node_get instead cpu_dev->of_node Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 03/20] cacheinfo: Add helper to access any cache index for a given CPU Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 04/20] cacheinfo: Move cache_leaves_are_shared out of CONFIG_OF Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 05/20] cacheinfo: Add support to check if last level cache(LLC) is valid or shared Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 06/20] cacheinfo: Allow early detection and population of cache attributes Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 07/20] cacheinfo: Use cache identifiers to check if the caches are shared if available Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 08/20] arch_topology: Add support to parse and detect cache attributes Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 09/20] arch_topology: Use the last level cache information from the cacheinfo Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 10/20] arm64: topology: Remove redundant setting of llc_id in CPU topology Sudeep Holla
2022-06-23 15:55   ` Catalin Marinas
2022-06-21 19:20 ` [PATCH v4 11/20] arch_topology: Drop LLC identifier stash from the " Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 12/20] arch_topology: Set thread sibling cpumask only within the cluster Sudeep Holla
2022-06-27 13:42   ` Ionela Voinescu
2022-06-21 19:20 ` [PATCH v4 13/20] arch_topology: Check for non-negative value rather than -1 for IDs validity Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 14/20] arch_topology: Avoid parsing through all the CPUs once a outlier CPU is found Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 15/20] arch_topology: Don't set cluster identifier as physical package identifier Sudeep Holla
2022-06-27 13:43   ` Ionela Voinescu [this message]
2022-06-21 19:20 ` [PATCH v4 16/20] arch_topology: Drop unnecessary check for uninitialised package_id Sudeep Holla
2022-06-27 13:12   ` Ionela Voinescu
2022-06-27 16:30     ` Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 17/20] arch_topology: Limit span of cpu_clustergroup_mask() Sudeep Holla
2022-06-21 19:20 ` [PATCH v4 18/20] arch_topology: Set cluster identifier in each core/thread from /cpu-map Sudeep Holla
2022-06-27 13:47   ` Ionela Voinescu
2022-06-21 19:20 ` [PATCH v4 19/20] arch_topology: Add support for parsing sockets in /cpu-map Sudeep Holla
2022-06-27 13:47   ` Ionela Voinescu
2022-06-21 19:20 ` [PATCH v4 20/20] arch_topology: Warn that topology for nested clusters is not supported Sudeep Holla
2022-06-22 15:06   ` Ionela Voinescu
2022-06-22 15:46     ` Sudeep Holla
2022-06-27 13:54 ` [PATCH v4 00/20] arch_topology: Updates to add socket support and fix cluster ids Ionela Voinescu
2022-06-27 16:22   ` Sudeep Holla

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