Merge remote-tracking branch 'samsung/for-next'

[karo-tx-linux.git] / arch / x86 / kernel / cpu / perf_event_intel_uncore.c

diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index 560e5255b15e870403728c3411c1b07246781cb7..61215a69b03d928d83dc6e86950bd5ad1b2db68c 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -7,7 +7,8 @@ struct intel_uncore_type **uncore_pci_uncores = empty_uncore;
 static bool pcidrv_registered;
 struct pci_driver *uncore_pci_driver;
 /* pci bus to socket mapping */
-int uncore_pcibus_to_physid[256] = { [0 ... 255] = -1, };
+DEFINE_RAW_SPINLOCK(pci2phy_map_lock);
+struct list_head pci2phy_map_head = LIST_HEAD_INIT(pci2phy_map_head);
 struct pci_dev *uncore_extra_pci_dev[UNCORE_SOCKET_MAX][UNCORE_EXTRA_PCI_DEV_MAX];
 
 static DEFINE_RAW_SPINLOCK(uncore_box_lock);
@@ -20,6 +21,59 @@ static struct event_constraint uncore_constraint_fixed =
 struct event_constraint uncore_constraint_empty =
        EVENT_CONSTRAINT(0, 0, 0);
 
+int uncore_pcibus_to_physid(struct pci_bus *bus)
+{
+       struct pci2phy_map *map;
+       int phys_id = -1;
+
+       raw_spin_lock(&pci2phy_map_lock);
+       list_for_each_entry(map, &pci2phy_map_head, list) {
+               if (map->segment == pci_domain_nr(bus)) {
+                       phys_id = map->pbus_to_physid[bus->number];
+                       break;
+               }
+       }
+       raw_spin_unlock(&pci2phy_map_lock);
+
+       return phys_id;
+}
+
+struct pci2phy_map *__find_pci2phy_map(int segment)
+{
+       struct pci2phy_map *map, *alloc = NULL;
+       int i;
+
+       lockdep_assert_held(&pci2phy_map_lock);
+
+lookup:
+       list_for_each_entry(map, &pci2phy_map_head, list) {
+               if (map->segment == segment)
+                       goto end;
+       }
+
+       if (!alloc) {
+               raw_spin_unlock(&pci2phy_map_lock);
+               alloc = kmalloc(sizeof(struct pci2phy_map), GFP_KERNEL);
+               raw_spin_lock(&pci2phy_map_lock);
+
+               if (!alloc)
+                       return NULL;
+
+               goto lookup;
+       }
+
+       map = alloc;
+       alloc = NULL;
+       map->segment = segment;
+       for (i = 0; i < 256; i++)
+               map->pbus_to_physid[i] = -1;
+       list_add_tail(&map->list, &pci2phy_map_head);
+
+end:
+       kfree(alloc);
+       return map;
+}
+
 ssize_t uncore_event_show(struct kobject *kobj,
                          struct kobj_attribute *attr, char *buf)
 {
@@ -809,7 +863,7 @@ static int uncore_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id
        int phys_id;
        bool first_box = false;
 
-       phys_id = uncore_pcibus_to_physid[pdev->bus->number];
+       phys_id = uncore_pcibus_to_physid(pdev->bus);
        if (phys_id < 0)
                return -ENODEV;
 
@@ -856,9 +910,10 @@ static void uncore_pci_remove(struct pci_dev *pdev)
 {
        struct intel_uncore_box *box = pci_get_drvdata(pdev);
        struct intel_uncore_pmu *pmu;
-       int i, cpu, phys_id = uncore_pcibus_to_physid[pdev->bus->number];
+       int i, cpu, phys_id;
        bool last_box = false;
 
+       phys_id = uncore_pcibus_to_physid(pdev->bus);
        box = pci_get_drvdata(pdev);
        if (!box) {
                for (i = 0; i < UNCORE_EXTRA_PCI_DEV_MAX; i++) {