1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 61e2fefeedab..87f4c504eafb 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -162,6 +162,20 @@ acpi_status pci_acpi_remove_pm_notifier(struct acpi_device *dev)
         return remove_pm_notifier(dev, pci_acpi_wake_dev);
 }
 
+phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle)
+{
+        acpi_status status = AE_NOT_EXIST;
+        unsigned long long mcfg_addr;
+
+        if (handle)
+                status = acpi_evaluate_integer(handle, METHOD_NAME__CBA,
+                                               NULL, &mcfg_addr);
+        if (ACPI_FAILURE(status))
+                return 0;
+
+        return (phys_addr_t)mcfg_addr;
+}
+
 /*
  * _SxD returns the D-state with the highest power
  * (lowest D-state number) supported in the S-state "x".