linux-kernel - [PATCH] x86: fixup numa_node information for AMD CPU northbridge functions

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Date:	Fri, 17 Apr 2009 12:07:46 +0200
From:	Andreas Herrmann <andreas.herrmann3@....com>
To:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>
CC:	jbarnes@...tuousgeek.org, linux-kernel@...r.kernel.org
Subject: [PATCH] x86: fixup numa_node information for AMD CPU northbridge
	functions

Currently the numa_node attribute for these PCI devices is 0 (it
corresponds to the numa_node for PCI bus 0). This is not a big issue
but incorrect.

This inconsistency can be fixed by reading the node number from CPU
NB function 0.

Signed-off-by: Andreas Herrmann <andreas.herrmann3@....com>
---
 arch/x86/kernel/quirks.c |   35 +++++++++++++++++++++++++++++++++++
 1 files changed, 35 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index e95022e..4dd4e70 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -493,5 +493,40 @@ void force_hpet_resume(void)
 		break;
 	}
 }
+#endif
+
+#if defined(CONFIG_PCI) && defined(CONFIG_NUMA)
+/* Set correct numa_node information for AMD NB functions */
+static void __init quirk_amd_nb_node(struct pci_dev *dev)
+{
+	u32 val;
+	struct pci_dev *nb_ht;
+	unsigned int devfn;
 
+	devfn = PCI_DEVFN(PCI_SLOT(dev->devfn), 0);
+	nb_ht = pci_get_slot(dev->bus, devfn);
+	if (!nb_ht)
+		return;
+	pci_read_config_dword(nb_ht, 0x60, &val);
+	set_dev_node(&dev->dev, val & 7);
+	pci_dev_put(dev);
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB,
+			quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP,
+			quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MEMCTL,
+			quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MISC,
+			quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_HT,
+			quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MAP,
+			quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_DRAM,
+			quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC,
+			quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_LINK,
+			quirk_amd_nb_node);
 #endif
-- 
1.6.2



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