| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jan Beulich | 384 | 28.74% | 2 | 15.38% |
| Weidong Han | 368 | 27.54% | 1 | 7.69% |
| Oleksandr Andrushchenko | 314 | 23.50% | 1 | 7.69% |
| Konrad Rzeszutek Wilk | 151 | 11.30% | 1 | 7.69% |
| Ross Lagerwall | 42 | 3.14% | 1 | 7.69% |
| Igor Druzhinin | 33 | 2.47% | 1 | 7.69% |
| Boris Ostrovsky | 30 | 2.25% | 1 | 7.69% |
| Ben Hutchings | 5 | 0.37% | 1 | 7.69% |
| Yang Zhang | 3 | 0.22% | 1 | 7.69% |
| caihuoqing | 2 | 0.15% | 1 | 7.69% |
| Rafael J. Wysocki | 2 | 0.15% | 1 | 7.69% |
| Thomas Gleixner | 2 | 0.15% | 1 | 7.69% |
| Total | 1336 | 13 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2009, Intel Corporation. * * Author: Weidong Han <weidong.han@intel.com> */ #include <linux/pci.h> #include <linux/acpi.h> #include <linux/pci-acpi.h> #include <xen/pci.h> #include <xen/xen.h> #include <xen/interface/physdev.h> #include <xen/interface/xen.h> #include <asm/xen/hypervisor.h> #include <asm/xen/hypercall.h> #include "../pci/pci.h" #ifdef CONFIG_PCI_MMCONFIG #include <asm/pci_x86.h> static int xen_mcfg_late(void); #endif static bool __read_mostly pci_seg_supported = true; static int xen_add_device(struct device *dev) { int r; struct pci_dev *pci_dev = to_pci_dev(dev); #ifdef CONFIG_PCI_IOV struct pci_dev *physfn = pci_dev->physfn; #endif #ifdef CONFIG_PCI_MMCONFIG static bool pci_mcfg_reserved = false; /* * Reserve MCFG areas in Xen on first invocation due to this being * potentially called from inside of acpi_init immediately after * MCFG table has been finally parsed. */ if (!pci_mcfg_reserved) { xen_mcfg_late(); pci_mcfg_reserved = true; } #endif if (pci_seg_supported) { struct { struct physdev_pci_device_add add; uint32_t pxm; } add_ext = { .add.seg = pci_domain_nr(pci_dev->bus), .add.bus = pci_dev->bus->number, .add.devfn = pci_dev->devfn }; struct physdev_pci_device_add *add = &add_ext.add; #ifdef CONFIG_ACPI acpi_handle handle; #endif #ifdef CONFIG_PCI_IOV if (pci_dev->is_virtfn) { add->flags = XEN_PCI_DEV_VIRTFN; add->physfn.bus = physfn->bus->number; add->physfn.devfn = physfn->devfn; } else #endif if (pci_ari_enabled(pci_dev->bus) && PCI_SLOT(pci_dev->devfn)) add->flags = XEN_PCI_DEV_EXTFN; #ifdef CONFIG_ACPI handle = ACPI_HANDLE(&pci_dev->dev); #ifdef CONFIG_PCI_IOV if (!handle && pci_dev->is_virtfn) handle = ACPI_HANDLE(physfn->bus->bridge); #endif if (!handle) { /* * This device was not listed in the ACPI name space at * all. Try to get acpi handle of parent pci bus. */ struct pci_bus *pbus; for (pbus = pci_dev->bus; pbus; pbus = pbus->parent) { handle = acpi_pci_get_bridge_handle(pbus); if (handle) break; } } if (handle) { acpi_status status; do { unsigned long long pxm; status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm); if (ACPI_SUCCESS(status)) { add->optarr[0] = pxm; add->flags |= XEN_PCI_DEV_PXM; break; } status = acpi_get_parent(handle, &handle); } while (ACPI_SUCCESS(status)); } #endif /* CONFIG_ACPI */ r = HYPERVISOR_physdev_op(PHYSDEVOP_pci_device_add, add); if (r != -ENOSYS) return r; pci_seg_supported = false; } if (pci_domain_nr(pci_dev->bus)) r = -ENOSYS; #ifdef CONFIG_PCI_IOV else if (pci_dev->is_virtfn) { struct physdev_manage_pci_ext manage_pci_ext = { .bus = pci_dev->bus->number, .devfn = pci_dev->devfn, .is_virtfn = 1, .physfn.bus = physfn->bus->number, .physfn.devfn = physfn->devfn, }; r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add_ext, &manage_pci_ext); } #endif else if (pci_ari_enabled(pci_dev->bus) && PCI_SLOT(pci_dev->devfn)) { struct physdev_manage_pci_ext manage_pci_ext = { .bus = pci_dev->bus->number, .devfn = pci_dev->devfn, .is_extfn = 1, }; r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add_ext, &manage_pci_ext); } else { struct physdev_manage_pci manage_pci = { .bus = pci_dev->bus->number, .devfn = pci_dev->devfn, }; r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add, &manage_pci); } return r; } static int xen_remove_device(struct device *dev) { int r; struct pci_dev *pci_dev = to_pci_dev(dev); if (pci_seg_supported) { struct physdev_pci_device device = { .seg = pci_domain_nr(pci_dev->bus), .bus = pci_dev->bus->number, .devfn = pci_dev->devfn }; r = HYPERVISOR_physdev_op(PHYSDEVOP_pci_device_remove, &device); } else if (pci_domain_nr(pci_dev->bus)) r = -ENOSYS; else { struct physdev_manage_pci manage_pci = { .bus = pci_dev->bus->number, .devfn = pci_dev->devfn }; r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_remove, &manage_pci); } return r; } static int xen_pci_notifier(struct notifier_block *nb, unsigned long action, void *data) { struct device *dev = data; int r = 0; switch (action) { case BUS_NOTIFY_ADD_DEVICE: r = xen_add_device(dev); break; case BUS_NOTIFY_DEL_DEVICE: r = xen_remove_device(dev); break; default: return NOTIFY_DONE; } if (r) dev_err(dev, "Failed to %s - passthrough or MSI/MSI-X might fail!\n", action == BUS_NOTIFY_ADD_DEVICE ? "add" : (action == BUS_NOTIFY_DEL_DEVICE ? "delete" : "?")); return NOTIFY_OK; } static struct notifier_block device_nb = { .notifier_call = xen_pci_notifier, }; static int __init register_xen_pci_notifier(void) { if (!xen_initial_domain()) return 0; return bus_register_notifier(&pci_bus_type, &device_nb); } arch_initcall(register_xen_pci_notifier); #ifdef CONFIG_PCI_MMCONFIG static int 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; } #endif #ifdef CONFIG_XEN_DOM0 struct xen_device_domain_owner { domid_t domain; struct pci_dev *dev; struct list_head list; }; static DEFINE_SPINLOCK(dev_domain_list_spinlock); static LIST_HEAD(dev_domain_list); static struct xen_device_domain_owner *find_device(struct pci_dev *dev) { struct xen_device_domain_owner *owner; list_for_each_entry(owner, &dev_domain_list, list) { if (owner->dev == dev) return owner; } return NULL; } int xen_find_device_domain_owner(struct pci_dev *dev) { struct xen_device_domain_owner *owner; int domain = -ENODEV; spin_lock(&dev_domain_list_spinlock); owner = find_device(dev); if (owner) domain = owner->domain; spin_unlock(&dev_domain_list_spinlock); return domain; } EXPORT_SYMBOL_GPL(xen_find_device_domain_owner); int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain) { struct xen_device_domain_owner *owner; owner = kzalloc(sizeof(struct xen_device_domain_owner), GFP_KERNEL); if (!owner) return -ENODEV; spin_lock(&dev_domain_list_spinlock); if (find_device(dev)) { spin_unlock(&dev_domain_list_spinlock); kfree(owner); return -EEXIST; } owner->domain = domain; owner->dev = dev; list_add_tail(&owner->list, &dev_domain_list); spin_unlock(&dev_domain_list_spinlock); return 0; } EXPORT_SYMBOL_GPL(xen_register_device_domain_owner); int xen_unregister_device_domain_owner(struct pci_dev *dev) { struct xen_device_domain_owner *owner; spin_lock(&dev_domain_list_spinlock); owner = find_device(dev); if (!owner) { spin_unlock(&dev_domain_list_spinlock); return -ENODEV; } list_del(&owner->list); spin_unlock(&dev_domain_list_spinlock); kfree(owner); return 0; } EXPORT_SYMBOL_GPL(xen_unregister_device_domain_owner); #endif