linux-kernel - Re: [PATCH v3 10/18] x86/intel_rdt: Build structures for each resource based on cache topology

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Date:   Sun, 9 Oct 2016 16:57:43 -0500
From:   Nilay Vaish <nilayvaish@...il.com>
To:     Fenghua Yu <fenghua.yu@...el.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <h.peter.anvin@...el.com>,
        Ingo Molnar <mingo@...e.hu>, Tony Luck <tony.luck@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Stephane Eranian <eranian@...gle.com>,
        Borislav Petkov <bp@...e.de>,
        Dave Hansen <dave.hansen@...el.com>, Shaohua Li <shli@...com>,
        David Carrillo-Cisneros <davidcc@...gle.com>,
        Ravi V Shankar <ravi.v.shankar@...el.com>,
        Sai Prakhya <sai.praneeth.prakhya@...el.com>,
        Vikas Shivappa <vikas.shivappa@...ux.intel.com>,
        linux-kernel <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>
Subject: Re: [PATCH v3 10/18] x86/intel_rdt: Build structures for each
 resource based on cache topology

On 7 October 2016 at 21:45, Fenghua Yu <fenghua.yu@...el.com> wrote:
> From: Tony Luck <tony.luck@...el.com>
>
> diff --git a/arch/x86/include/asm/intel_rdt.h b/arch/x86/include/asm/intel_rdt.h
> index 251ac2a..bad8dc7 100644
> --- a/arch/x86/include/asm/intel_rdt.h
> +++ b/arch/x86/include/asm/intel_rdt.h
> @@ -40,6 +40,39 @@ struct rdt_resource {
>                 if (r->enabled)
>
>  #define IA32_L3_CBM_BASE       0xc90
> +
> +/**
> + * struct rdt_domain - group of cpus sharing an RDT resource
> + * @list:      all instances of this resource
> + * @id:                unique id for this instance
> + * @cpu_mask:  which cpus share this resource
> + * @cbm:       array of cache bit masks (indexed by CLOSID)
> + */
> +struct rdt_domain {
> +       struct list_head        list;
> +       int                     id;
> +       struct cpumask          cpu_mask;
> +       u32                     *cbm;
> +};
> +
> +/**
> + * struct msr_param - set a range of MSRs from a domain
> + * @res:       The resource to use
> + * @low:       Beginning index from base MSR
> + * @high:      End index
> + */
> +struct msr_param {
> +       struct rdt_resource     *res;
> +       int                     low;
> +       int                     high;
> +};
> +
> +extern struct static_key_false rdt_enable_key;
> +extern struct mutex rdtgroup_mutex;
> +
> +int __init rdtgroup_init(void);
> +
> +extern struct rdtgroup *rdtgroup_default;

struct rdtgroup has not been defined yet.  The statement above should
be part of the next patch.

--
Nilay