^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (c) 2009, Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author: Weidong Han <weidong.han@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/pci-acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <xen/xen.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <xen/interface/physdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <xen/interface/xen.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/xen/hypervisor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/xen/hypercall.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "../pci/pci.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #ifdef CONFIG_PCI_MMCONFIG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/pci_x86.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static int xen_mcfg_late(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static bool __read_mostly pci_seg_supported = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static int xen_add_device(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct pci_dev *pci_dev = to_pci_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #ifdef CONFIG_PCI_IOV
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct pci_dev *physfn = pci_dev->physfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #ifdef CONFIG_PCI_MMCONFIG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static bool pci_mcfg_reserved = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * Reserve MCFG areas in Xen on first invocation due to this being
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * potentially called from inside of acpi_init immediately after
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * MCFG table has been finally parsed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) if (!pci_mcfg_reserved) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) xen_mcfg_late();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) pci_mcfg_reserved = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (pci_seg_supported) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct physdev_pci_device_add add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) uint32_t pxm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) } add_ext = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) .add.seg = pci_domain_nr(pci_dev->bus),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .add.bus = pci_dev->bus->number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .add.devfn = pci_dev->devfn
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct physdev_pci_device_add *add = &add_ext.add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #ifdef CONFIG_ACPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) acpi_handle handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #ifdef CONFIG_PCI_IOV
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (pci_dev->is_virtfn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) add->flags = XEN_PCI_DEV_VIRTFN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) add->physfn.bus = physfn->bus->number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) add->physfn.devfn = physfn->devfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (pci_ari_enabled(pci_dev->bus) && PCI_SLOT(pci_dev->devfn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) add->flags = XEN_PCI_DEV_EXTFN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #ifdef CONFIG_ACPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) handle = ACPI_HANDLE(&pci_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #ifdef CONFIG_PCI_IOV
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (!handle && pci_dev->is_virtfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) handle = ACPI_HANDLE(physfn->bus->bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (!handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * This device was not listed in the ACPI name space at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * all. Try to get acpi handle of parent pci bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct pci_bus *pbus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) for (pbus = pci_dev->bus; pbus; pbus = pbus->parent) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) handle = acpi_pci_get_bridge_handle(pbus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) unsigned long long pxm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) status = acpi_evaluate_integer(handle, "_PXM",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) NULL, &pxm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (ACPI_SUCCESS(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) add->optarr[0] = pxm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) add->flags |= XEN_PCI_DEV_PXM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) status = acpi_get_parent(handle, &handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) } while (ACPI_SUCCESS(status));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #endif /* CONFIG_ACPI */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) r = HYPERVISOR_physdev_op(PHYSDEVOP_pci_device_add, add);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (r != -ENOSYS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) pci_seg_supported = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (pci_domain_nr(pci_dev->bus))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) r = -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #ifdef CONFIG_PCI_IOV
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) else if (pci_dev->is_virtfn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct physdev_manage_pci_ext manage_pci_ext = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) .bus = pci_dev->bus->number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) .devfn = pci_dev->devfn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .is_virtfn = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .physfn.bus = physfn->bus->number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .physfn.devfn = physfn->devfn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add_ext,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) &manage_pci_ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) else if (pci_ari_enabled(pci_dev->bus) && PCI_SLOT(pci_dev->devfn)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct physdev_manage_pci_ext manage_pci_ext = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .bus = pci_dev->bus->number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .devfn = pci_dev->devfn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .is_extfn = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add_ext,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) &manage_pci_ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct physdev_manage_pci manage_pci = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .bus = pci_dev->bus->number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) .devfn = pci_dev->devfn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) &manage_pci);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static int xen_remove_device(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct pci_dev *pci_dev = to_pci_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (pci_seg_supported) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct physdev_pci_device device = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) .seg = pci_domain_nr(pci_dev->bus),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) .bus = pci_dev->bus->number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) .devfn = pci_dev->devfn
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) r = HYPERVISOR_physdev_op(PHYSDEVOP_pci_device_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) &device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) } else if (pci_domain_nr(pci_dev->bus))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) r = -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct physdev_manage_pci manage_pci = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) .bus = pci_dev->bus->number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) .devfn = pci_dev->devfn
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) &manage_pci);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static int xen_pci_notifier(struct notifier_block *nb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) unsigned long action, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct device *dev = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) int r = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) switch (action) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) case BUS_NOTIFY_ADD_DEVICE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) r = xen_add_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) case BUS_NOTIFY_DEL_DEVICE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) r = xen_remove_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (r)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) dev_err(dev, "Failed to %s - passthrough or MSI/MSI-X might fail!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) action == BUS_NOTIFY_ADD_DEVICE ? "add" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) (action == BUS_NOTIFY_DEL_DEVICE ? "delete" : "?"));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) return NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) static struct notifier_block device_nb = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) .notifier_call = xen_pci_notifier,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static int __init register_xen_pci_notifier(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (!xen_initial_domain())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) return bus_register_notifier(&pci_bus_type, &device_nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) arch_initcall(register_xen_pci_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) #ifdef CONFIG_PCI_MMCONFIG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static int xen_mcfg_late(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) struct pci_mmcfg_region *cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (!xen_initial_domain())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if ((pci_probe & PCI_PROBE_MMCONF) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (list_empty(&pci_mmcfg_list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /* Check whether they are in the right area. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) list_for_each_entry(cfg, &pci_mmcfg_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct physdev_pci_mmcfg_reserved r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) r.address = cfg->address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) r.segment = cfg->segment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) r.start_bus = cfg->start_bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) r.end_bus = cfg->end_bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) r.flags = XEN_PCI_MMCFG_RESERVED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) rc = HYPERVISOR_physdev_op(PHYSDEVOP_pci_mmcfg_reserved, &r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) switch (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) case -ENOSYS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) pr_warn("Failed to report MMCONFIG reservation"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) " state for %s to hypervisor"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) " (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) cfg->name, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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