From: Bert Wesarg <bert.wesarg@googlemail.com>
To: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/5] x86: add cpu_node topology detection for AMD Magny-Cours
Date: Wed, 3 Jun 2009 16:48:07 +0200 [thread overview]
Message-ID: <36ca99e90906030748l6e6cc2caqb575c924836dc0e@mail.gmail.com> (raw)
In-Reply-To: <20090603143559.GL5736@alberich.amd.com>
On Wed, Jun 3, 2009 at 16:35, Andreas Herrmann
<andreas.herrmann3@amd.com> wrote:
> This adapts CPU topology detection for AMD Magny-Cours.
>
> Here is example output from two cores on same package but different
> internal cpu_nodes:
>
> /sys/devices/system/cpu/cpu5:
> physical_package_id : 0
> core_id : 5
> thread_siblings : 00000020
> thread_siblings_list : 5
> cpu_node_id : 0
> cpu_node_siblings : 0000003f
> cpu_node_siblings_list : 0-5
> core_siblings : 00000fff
> core_siblings_list : 0-11
> /sys/devices/system/cpu/cpu6:
> physical_package_id : 0
> core_id : 0
> thread_siblings : 00000040
> thread_siblings_list : 6
> cpu_node_id : 1
> cpu_node_siblings : 00000fc0
> cpu_node_siblings_list : 6-11
> core_siblings : 00000fff
> core_siblings_list : 0-11
>
> Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
> ---
> arch/x86/include/asm/cpufeature.h | 1 +
> arch/x86/kernel/cpu/amd.c | 61 +++++++++++++++++++++++++++++++++++++
> 2 files changed, 62 insertions(+), 0 deletions(-)
>
> diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
> index 728b375..feed057 100644
> --- a/arch/x86/kernel/cpu/amd.c
> +++ b/arch/x86/kernel/cpu/amd.c
> @@ -274,7 +328,14 @@ static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
> int node;
> unsigned apicid = cpu_has_apic ? hard_smp_processor_id() : c->apicid;
>
> +#ifdef CONFIG_MULTI_NODE_CPU
> + if (cpu_has(c, X86_FEATURE_AMD_DCM))
> + node = (c->phys_proc_id << 1) + c->cpu_node_id;
> + else
> + node = c->phys_proc_id;
> +#else
> node = c->phys_proc_id;
> +#endif
Stale CONFIG_MULTI_NODE_CPU?
Regards,
Bert
> if (apicid_to_node[apicid] != NUMA_NO_NODE)
> node = apicid_to_node[apicid];
> if (!node_online(node)) {
> --
> 1.6.3.1
>
>
>
>
next prev parent reply other threads:[~2009-06-03 14:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-03 14:27 [PATCH 0/5 v3] x86: adapt CPU " Andreas Herrmann
2009-06-03 14:29 ` [PATCH 1/5] topology: introduce cpu_node information for multi-node processors Andreas Herrmann
2009-06-03 14:33 ` Bert Wesarg
2009-06-03 14:34 ` [PATCH 2/5] x86: provide CPU topology " Andreas Herrmann
2009-06-03 14:35 ` [PATCH 3/5] x86: add cpu_node topology detection for AMD Magny-Cours Andreas Herrmann
2009-06-03 14:48 ` Bert Wesarg [this message]
2009-06-03 15:16 ` [PATCH 3/5 retry] " Andreas Herrmann
2009-06-03 14:37 ` [PATCH 4/5] x86: cacheinfo: fixup L3 cache information " Andreas Herrmann
2009-06-03 14:44 ` [PATCH 5/5] x86: mcheck: make use of cpu_node_mask instead of cpu_core_mask to support multi-node processors Andreas Herrmann
2009-06-07 13:40 ` [PATCH 0/5 v3] x86: adapt CPU topology detection for AMD Magny-Cours Ingo Molnar
2009-06-11 15:38 ` Andreas Herrmann
2009-08-05 15:44 [PATCH 0/5 v4] x86: Adapt " Andreas Herrmann
2009-08-05 15:49 ` [PATCH 3/5] x86: Add cpu_node " Andreas Herrmann
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