linux-kernel - Re: [PATCH 04/16] ARM: realview: use generic API for enabling SCU

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 14 Nov 2016 12:56:24 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Pankaj Dubey <pankaj.dubey@...sung.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        rmk+kernel@...linux.org.uk, horms@...ge.net.au,
        magnus.damm@...il.com, geert+renesas@...der.be, vireshk@...nel.org,
        shiraz.linux.kernel@...il.com, krzk@...nel.org,
        thomas.ab@...sung.com, Russell King <linux@...linux.org.uk>
Subject: Re: [PATCH 04/16] ARM: realview: use generic API for enabling SCU

On Monday, November 14, 2016 10:31:59 AM CET Pankaj Dubey wrote:
>  static const struct of_device_id realview_scu_match[] = {
>         { .compatible = "arm,arm11mp-scu", },
> -       { .compatible = "arm,cortex-a9-scu", },
> -       { .compatible = "arm,cortex-a5-scu", },
>         { }
>  };
>  
> @@ -41,27 +39,18 @@ static void __init realview_smp_prepare_cpus(unsigned int max_cpus)
>         struct device_node *np;
>         void __iomem *scu_base;
>         struct regmap *map;
> -       unsigned int ncores;
>         int i;
>  
> -       np = of_find_matching_node(NULL, realview_scu_match);
> -       if (!np) {
> -               pr_err("PLATSMP: No SCU base address\n");
> -               return;
> +       if (of_scu_enable()) {
> +               np = of_find_matching_node(NULL, realview_scu_match);
> +               scu_base = of_iomap(np, 0);
> +               of_node_put(np);
> +               if (!scu_base) {
> +                       pr_err("PLATSMP: No SCU remap\n");
> +                       return;
> +               }
> +               scu_enable(scu_base);
>         }
> 

The only difference here seems to be that realview also needs to handle
"arm,arm11mp-scu". Why not move that into the generic implementation?

	Arnd