diff options
Diffstat (limited to 'drivers/xen/pci.c')
| -rw-r--r-- | drivers/xen/pci.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/xen/pci.c b/drivers/xen/pci.c index 18fff88254eb..d15f6e80479f 100644 --- 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 |