Merge tag 'pm+acpi-2-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafae...

[linux-drm-fsl-dcu.git] / drivers / xen / pci.c

diff --git a/drivers/xen/pci.c b/drivers/xen/pci.c
index cc86b267056faa1247cf5e87ce5905e5fb0f3943..188825122aae8a037bccc8255dbd43211ca6a941 100644 (file)
--- a/drivers/xen/pci.c
+++ b/drivers/xen/pci.c
@@ -26,6 +26,7 @@
 #include <asm/xen/hypervisor.h>
 #include <asm/xen/hypercall.h>
 #include "../pci/pci.h"
+#include <asm/pci_x86.h>
 
 static bool __read_mostly pci_seg_supported = true;
 
@@ -192,3 +193,49 @@ static int __init register_xen_pci_notifier(void)
 }
 
 arch_initcall(register_xen_pci_notifier);
+
+#ifdef CONFIG_PCI_MMCONFIG
+static int __init xen_mcfg_late(void)
+{
+       struct pci_mmcfg_region *cfg;
+       int rc;
+
+       if (!xen_initial_domain())
+               return 0;
+
+       if ((pci_probe & PCI_PROBE_MMCONF) == 0)
+               return 0;
+
+       if (list_empty(&pci_mmcfg_list))
+               return 0;
+
+       /* Check whether they are in the right area. */
+       list_for_each_entry(cfg, &pci_mmcfg_list, list) {
+               struct physdev_pci_mmcfg_reserved r;
+
+               r.address = cfg->address;
+               r.segment = cfg->segment;
+               r.start_bus = cfg->start_bus;
+               r.end_bus = cfg->end_bus;
+               r.flags = XEN_PCI_MMCFG_RESERVED;
+
+               rc = HYPERVISOR_physdev_op(PHYSDEVOP_pci_mmcfg_reserved, &r);
+               switch (rc) {
+               case 0:
+               case -ENOSYS:
+                       continue;
+
+               default:
+                       pr_warn("Failed to report MMCONFIG reservation"
+                               " state for %s to hypervisor"
+                               " (%d)\n",
+                               cfg->name, rc);
+               }
+       }
+       return 0;
+}
+/*
+ * Needs to be done after acpi_init which are subsys_initcall.
+ */
+subsys_initcall_sync(xen_mcfg_late);
+#endif