linux-kernel - [PATCH 2/3] Add multi-node boot support

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Date:	Tue, 18 Oct 2011 16:22:35 +0800
From:	Daniel J Blueman <daniel@...ascale-asia.com>
To:	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	H Peter Anvin <hpa@...or.com>
Cc:	Steffen Persvold <sp@...ascale.com>, linux-kernel@...r.kernel.org,
	x86@...nel.org, Daniel J Blueman <daniel@...ascale-asia.com>
Subject: [PATCH 2/3] Add multi-node boot support

Fix booting multi-node systems with Numascale's NumaChip.

v2:
 - [Daniel] rediffed and validated against 3.1-rc10

Signed-off-by: Steffen Persvold <sp@...ascale.com>
Signed-off-by: Daniel J Blueman <daniel@...ascale-asia.com>
---
 arch/x86/kernel/cpu/amd.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index b13ed39..4b551f5 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -7,6 +7,7 @@
 #include <asm/apic.h>
 #include <asm/cpu.h>
 #include <asm/pci-direct.h>
+#include <asm/numachip/numachip.h>
 
 #ifdef CONFIG_X86_64
 # include <asm/numa_64.h>
@@ -350,6 +351,12 @@ static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
 	node = numa_cpu_node(cpu);
 	if (node == NUMA_NO_NODE)
 		node = per_cpu(cpu_llc_id, cpu);
+	else if (is_numachip_system()) {
+		/* fix for multi-node systems: set phys_proc_id and cpu_llc_id
+		   to node number from ACPI SRAT table */
+		c->phys_proc_id = node;
+		per_cpu(cpu_llc_id, cpu) = node;
+	}
 
 	if (!node_online(node)) {
 		/*
-- 
1.7.5.4

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