PCI: derive nearby CPUs from device's instead of bus' NUMA information
In case of AMD CPU northbridge functions this NUMA information might differ. Here is an example from a 4-socket system. Currently Linux shows root@hagen:/sys/devices/pci0000:00/0000:00:1a.4# cat numa_node 0 root@hagen:/sys/devices/pci0000:00/0000:00:1a.4# cat local_cpu* 0-3 00000000,0000000f which is not correct for northbridge functions as the local CPUs are those of the same socket. With this patch and a quirk for AMD CPU NB functions Linux can do better and correctly show root@hagen:/sys/devices/pci0000:00/0000:00:1a.4# cat numa_node 2 root@hagen:/sys/devices/pci0000:00/0000:00:1a.4# cat local_cpu* 8-11 00000000,00000f00 Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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@ -74,7 +74,11 @@ static ssize_t local_cpus_show(struct device *dev,
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const struct cpumask *mask;
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int len;
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#ifdef CONFIG_NUMA
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mask = cpumask_of_node(dev_to_node(dev));
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#else
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mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
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#endif
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len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask);
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buf[len++] = '\n';
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buf[len] = '\0';
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@ -88,7 +92,11 @@ static ssize_t local_cpulist_show(struct device *dev,
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const struct cpumask *mask;
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int len;
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#ifdef CONFIG_NUMA
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mask = cpumask_of_node(dev_to_node(dev));
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#else
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mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
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#endif
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len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask);
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buf[len++] = '\n';
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buf[len] = '\0';
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