5 files changed, 47 insertions, 30 deletions

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 6fc204a52493..63b2cb775324 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -871,6 +871,7 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
 	struct acpi_device *device = root->device;
 	int node = acpi_get_node(device->handle);
 	struct pci_bus *bus;
+	struct pci_host_bridge *host_bridge;
 
 	info->root = root;
 	info->bridge = device;
@@ -895,9 +896,17 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
 	if (!bus)
 		goto out_release_info;
 
+	host_bridge = to_pci_host_bridge(bus->bridge);
+	if (!(root->osc_control_set & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL))
+		host_bridge->native_hotplug = 0;
+	if (!(root->osc_control_set & OSC_PCI_EXPRESS_AER_CONTROL))
+		host_bridge->native_aer = 0;
+	if (!(root->osc_control_set & OSC_PCI_EXPRESS_PME_CONTROL))
+		host_bridge->native_pme = 0;
+
 	pci_scan_child_bus(bus);
-	pci_set_host_bridge_release(to_pci_host_bridge(bus->bridge),
-				    acpi_pci_root_release_info, info);
+	pci_set_host_bridge_release(host_bridge, acpi_pci_root_release_info,
+				    info);
 	if (node != NUMA_NO_NODE)
 		dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
 	return bus;
diff --git a/drivers/pci/pcie/Makefile b/drivers/pci/pcie/Makefile
index e01c10c97b95..11fb633b866c 100644
--- a/drivers/pci/pcie/Makefile
+++ b/drivers/pci/pcie/Makefile
@@ -7,7 +7,6 @@
 obj-$(CONFIG_PCIEASPM)		+= aspm.o
 
 pcieportdrv-y			:= portdrv_core.o portdrv_pci.o
-pcieportdrv-$(CONFIG_ACPI)	+= portdrv_acpi.o
 
 obj-$(CONFIG_PCIEPORTBUS)	+= pcieportdrv.o
 
diff --git a/drivers/pci/pcie/portdrv.h b/drivers/pci/pcie/portdrv.h
index 7bfd75f9197b..ed84e767085f 100644
--- a/drivers/pci/pcie/portdrv.h
+++ b/drivers/pci/pcie/portdrv.h
@@ -123,15 +123,4 @@ static inline bool pcie_pme_no_msi(void) { return false; }
 static inline void pcie_pme_interrupt_enable(struct pci_dev *dev, bool en) {}
 #endif /* !CONFIG_PCIE_PME */
 
-#ifdef CONFIG_ACPI
-void pcie_port_acpi_setup(struct pci_dev *port, int *mask);
-
-static inline void pcie_port_platform_notify(struct pci_dev *port, int *mask)
-{
-	pcie_port_acpi_setup(port, mask);
-}
-#else /* !CONFIG_ACPI */
-static inline void pcie_port_platform_notify(struct pci_dev *port, int *mask){}
-#endif /* !CONFIG_ACPI */
-
 #endif /* _PORTDRV_H_ */
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index bf851da97947..5c25761cd05e 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -206,19 +206,20 @@ legacy_irq:
  */
 static int get_port_device_capability(struct pci_dev *dev)
 {
+	struct pci_host_bridge *host = pci_find_host_bridge(dev->bus);
+	bool native;
 	int services = 0;
-	int cap_mask = 0;
 
-	cap_mask = PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP;
-	if (pci_aer_available())
-		cap_mask |= PCIE_PORT_SERVICE_AER | PCIE_PORT_SERVICE_DPC;
-
-	if (pcie_ports_auto)
-		pcie_port_platform_notify(dev, &cap_mask);
+	/*
+	 * If the user specified "pcie_ports=native", use the PCIe services
+	 * regardless of whether the platform has given us permission.  On
+	 * ACPI systems, this means we ignore _OSC.
+	 */
+	native = !pcie_ports_auto;
 
-	/* Hot-Plug Capable */
-	if ((cap_mask & PCIE_PORT_SERVICE_HP) && dev->is_hotplug_bridge) {
+	if (dev->is_hotplug_bridge && (native || host->native_hotplug)) {
 		services |= PCIE_PORT_SERVICE_HP;
+
 		/*
 		 * Disable hot-plug interrupts in case they have been enabled
 		 * by the BIOS and the hot-plug service driver is not loaded.
@@ -226,20 +227,27 @@ static int get_port_device_capability(struct pci_dev *dev)
 		pcie_capability_clear_word(dev, PCI_EXP_SLTCTL,
 			  PCI_EXP_SLTCTL_CCIE | PCI_EXP_SLTCTL_HPIE);
 	}
-	/* AER capable */
-	if ((cap_mask & PCIE_PORT_SERVICE_AER)
-	    && pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR)) {
+
+	if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR) &&
+	    pci_aer_available() && (native || host->native_aer)) {
 		services |= PCIE_PORT_SERVICE_AER;
+
 		/*
 		 * Disable AER on this port in case it's been enabled by the
 		 * BIOS (the AER service driver will enable it when necessary).
 		 */
 		pci_disable_pcie_error_reporting(dev);
 	}
-	/* Root ports are capable of generating PME too */
-	if ((cap_mask & PCIE_PORT_SERVICE_PME)
-	    && pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) {
+
+	/*
+	 * Root ports are capable of generating PME too.  Root Complex
+	 * Event Collectors can also generate PMEs, but we don't handle
+	 * those yet.
+	 */
+	if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT &&
+	    (native || host->native_pme)) {
 		services |= PCIE_PORT_SERVICE_PME;
+
 		/*
 		 * Disable PME interrupt on this port in case it's been enabled
 		 * by the BIOS (the PME service driver will enable it when
@@ -247,7 +255,9 @@ static int get_port_device_capability(struct pci_dev *dev)
 		 */
 		pcie_pme_interrupt_enable(dev, false);
 	}
-	if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_DPC))
+
+	if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_DPC) &&
+	    pci_aer_available())
 		services |= PCIE_PORT_SERVICE_DPC;
 
 	return services;
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index ef5377438a1e..a00de697a970 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -540,6 +540,16 @@ struct pci_host_bridge *pci_alloc_host_bridge(size_t priv)
 	INIT_LIST_HEAD(&bridge->windows);
 	bridge->dev.release = pci_release_host_bridge_dev;
 
+	/*
+	 * We assume we can manage these PCIe features.  Some systems may
+	 * reserve these for use by the platform itself, e.g., an ACPI BIOS
+	 * may implement its own AER handling and use _OSC to prevent the
+	 * OS from interfering.
+	 */
+	bridge->native_aer = 1;
+	bridge->native_hotplug = 1;
+	bridge->native_pme = 1;
+
 	return bridge;
 }
 EXPORT_SYMBOL(pci_alloc_host_bridge);