x86: multi pci root bus with different io resource range, on 64-bit

scan AMD opteron io/mmio routing to make sure every pci root bus get correct
resource range. Thus later pci scan could assign correct resource to device
with unassigned resource.

this can fix a system without _CRS for multi pci root bus.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 4 insertions, 1 deletions

diff --git a/include/asm-x86/topology.h b/include/asm-x86/topology.h
index 4793ae745a78..0e6d6b03affe 100644
--- a/include/asm-x86/topology.h
+++ b/include/asm-x86/topology.h
@@ -193,6 +193,9 @@ extern cpumask_t cpu_coregroup_map(int cpu);
 #define topology_thread_siblings(cpu)           (per_cpu(cpu_sibling_map, cpu))
 #endif
 
+struct pci_bus;
+void set_pci_bus_resources_arch_default(struct pci_bus *b);
+
 #ifdef CONFIG_SMP
 #define mc_capable()                    (boot_cpu_data.x86_max_cores > 1)
 #define smt_capable()                   (smp_num_siblings > 1)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index a71954a38932..abc998ffb66e 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -254,7 +254,7 @@ static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
 #define PCI_NUM_RESOURCES       11
 
 #ifndef PCI_BUS_NUM_RESOURCES
-#define PCI_BUS_NUM_RESOURCES   8
+#define PCI_BUS_NUM_RESOURCES   16
 #endif
 
 #define PCI_REGION_FLAG_MASK    0x0fU   /* These bits of resource flags tell us the PCI region flags */