linux-kernel - Re: [PATCH v3 02/16] ARM: DT/kernel: define ARM specific arch_match_cpu_phys

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Message-ID: <alpine.LFD.2.03.1307221014270.15022@syhkavp.arg>
Date:	Mon, 22 Jul 2013 10:14:55 -0400 (EDT)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	Sudeep KarkadaNagesha <Sudeep.KarkadaNagesha@....com>
cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	cpufreq@...r.kernel.org, linux-pm@...r.kernel.org,
	devicetree@...r.kernel.org, Russell King <linux@....linux.org.uk>,
	Shawn Guo <shawn.guo@...aro.org>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Olof Johansson <olof@...om.net>, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v3 02/16] ARM: DT/kernel: define ARM specific
 arch_match_cpu_phys_id

On Mon, 22 Jul 2013, Sudeep KarkadaNagesha wrote:

> From: Sudeep KarkadaNagesha <sudeep.karkadanagesha@....com>
> 
> OF/DT core library now provides architecture specific hook to match the
> logical cpu index with the corresponding physical identifier. Most of the
> cpu DT node parsing and initialisation is contained in devtree.c. So it's
> better to define ARM specific arch_match_cpu_phys_id there.
> 
> This mainly helps to avoid replication of the code doing CPU node parsing
> and physical(MPIDR) to logical mapping.
> 
> Cc: Russell King <linux@....linux.org.uk>
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
> Acked-by: Rob Herring <rob.herring@...xeda.com>
> Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@....com>

Acked-by: Nicolas Pitre <nico@...aro.org>


> ---
>  arch/arm/kernel/devtree.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
> index 5859c8b..2ee8a17 100644
> --- a/arch/arm/kernel/devtree.c
> +++ b/arch/arm/kernel/devtree.c
> @@ -169,6 +169,11 @@ void __init arm_dt_init_cpu_maps(void)
>  	}
>  }
>  
> +bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
> +{
> +	return (phys_id & MPIDR_HWID_BITMASK) == cpu_logical_map(cpu);
> +}
> +
>  /**
>   * setup_machine_fdt - Machine setup when an dtb was passed to the kernel
>   * @dt_phys: physical address of dt blob
> -- 
> 1.8.1.2
> 
> 
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