diff options
Diffstat (limited to 'drivers/acpi/pci_root.c')
| -rw-r--r-- | drivers/acpi/pci_root.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 642554b1b60c..5b38a026d122 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -31,6 +31,7 @@ #include <linux/spinlock.h> #include <linux/pm.h> #include <linux/pci.h> +#include <linux/pci-acpi.h> #include <linux/acpi.h> #include <acpi/acpi_bus.h> #include <acpi/acpi_drivers.h> @@ -193,6 +194,7 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device) unsigned long long value = 0; acpi_handle handle = NULL; struct acpi_device *child; + u32 flags, base_flags; if (!device) @@ -210,6 +212,13 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device) device->ops.bind = acpi_pci_bind; + /* + * All supported architectures that use ACPI have support for + * PCI domains, so we indicate this in _OSC support capabilities. + */ + flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT; + pci_acpi_osc_support(device->handle, flags); + /* * Segment * ------- @@ -335,6 +344,17 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device) list_for_each_entry(child, &device->children, node) acpi_pci_bridge_scan(child); + /* Indicate support for various _OSC capabilities. */ + if (pci_ext_cfg_avail(root->bus->self)) + flags |= OSC_EXT_PCI_CONFIG_SUPPORT; + if (pcie_aspm_enabled()) + flags |= OSC_ACTIVE_STATE_PWR_SUPPORT | + OSC_CLOCK_PWR_CAPABILITY_SUPPORT; + if (pci_msi_enabled()) + flags |= OSC_MSI_SUPPORT; + if (flags != base_flags) + pci_acpi_osc_support(device->handle, flags); + end: if (result) { if (!list_empty(&root->node)) |