From: Andi Kleen <ak@suse.de>
Date: Mon, 12 Sep 2005 16:49:24 +0000 (+0200)
Subject: [PATCH] x86-64: Use SRAT data on Intel systems too.
X-Git-Tag: 2.1b_release~39722
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=df0cc26b1b7f88f46307eea50a7469f0b58132d9;p=platform%2Fkernel%2Fkernel-mfld-blackbay.git

[PATCH] x86-64: Use SRAT data on Intel systems too.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c
index df55a63..869770d 100644
--- a/arch/x86_64/kernel/setup.c
+++ b/arch/x86_64/kernel/setup.c
@@ -942,6 +942,25 @@ static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
 		return 1;
 }
 
+static void srat_detect_node(void)
+{
+#ifdef CONFIG_NUMA
+	unsigned apicid, node;
+	int cpu = smp_processor_id();
+
+	/* Don't do the funky fallback heuristics the AMD version employs
+	   for now. */
+	apicid = phys_proc_id[cpu];
+	node = apicid_to_node[apicid];
+	if (node == NUMA_NO_NODE)
+		node = 0;
+	cpu_to_node[cpu] = node;
+
+	if (acpi_numa > 0)
+		printk(KERN_INFO "CPU %d -> Node %d\n", cpu, node);
+#endif
+}
+
 static void __cpuinit init_intel(struct cpuinfo_x86 *c)
 {
 	/* Cache sizes */
@@ -960,6 +979,8 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
 	if (c->x86 >= 15)
 		set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
  	c->x86_num_cores = intel_num_cpu_cores(c);
+
+	srat_detect_node();
 }
 
 static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)