*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
- * License version 2 as published by the Free Software Foundation.
+ * License version 2.1 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
#include "hw/pci-host/i440fx.h"
#include "hw/pci/pci.h"
#include "hw/pci/pci_bridge.h"
+#include "hw/pci/pci_host.h"
+#include "hw/pci/pcie_port.h"
+#include "hw/pci-bridge/xio3130_downstream.h"
+#include "hw/i386/acpi-build.h"
#include "hw/acpi/acpi.h"
-#include "exec/address-spaces.h"
#include "hw/pci/pci_bus.h"
#include "migration/vmstate.h"
#include "qapi/error.h"
#include "qom/qom-qobject.h"
#include "trace.h"
-#define ACPI_PCIHP_ADDR 0xae00
-#define ACPI_PCIHP_SIZE 0x0014
+#define ACPI_PCIHP_SIZE 0x0018
#define PCI_UP_BASE 0x0000
#define PCI_DOWN_BASE 0x0004
#define PCI_EJ_BASE 0x0008
#define PCI_RMV_BASE 0x000c
#define PCI_SEL_BASE 0x0010
+#define PCI_AIDX_BASE 0x0014
typedef struct AcpiPciHpFind {
int bsel;
PCIBus *bus;
} AcpiPciHpFind;
+static gint g_cmp_uint32(gconstpointer a, gconstpointer b, gpointer user_data)
+{
+ return a - b;
+}
+
+static GSequence *pci_acpi_index_list(void)
+{
+ static GSequence *used_acpi_index_list;
+
+ if (!used_acpi_index_list) {
+ used_acpi_index_list = g_sequence_new(NULL);
+ }
+ return used_acpi_index_list;
+}
+
static int acpi_pcihp_get_bsel(PCIBus *bus)
{
Error *local_err = NULL;
static void acpi_set_pci_info(void)
{
static bool bsel_is_set;
+ Object *host = acpi_get_i386_pci_host();
PCIBus *bus;
unsigned bsel_alloc = ACPI_PCIHP_BSEL_DEFAULT;
}
bsel_is_set = true;
- bus = find_i440fx(); /* TODO: Q35 support */
+ if (!host) {
+ return;
+ }
+
+ bus = PCI_HOST_BRIDGE(host)->bus;
if (bus) {
/* Scan all PCI buses. Set property to enable acpi based hotplug. */
pci_for_each_bus_depth_first(bus, acpi_set_bsel, NULL, &bsel_alloc);
static void acpi_pcihp_disable_root_bus(void)
{
- static bool root_hp_disabled;
+ Object *host = acpi_get_i386_pci_host();
PCIBus *bus;
- if (root_hp_disabled) {
- return;
- }
-
- bus = find_i440fx();
- if (bus) {
+ bus = PCI_HOST_BRIDGE(host)->bus;
+ if (bus && qbus_is_hotpluggable(BUS(bus))) {
/* setting the hotplug handler to NULL makes the bus non-hotpluggable */
qbus_set_hotplug_handler(BUS(bus), NULL);
}
- root_hp_disabled = true;
+
return;
}
if (!bsel && !find.bus) {
find.bus = s->root;
}
+
+ /*
+ * Check if find.bus is actually hotpluggable. If bsel is set to
+ * NULL for example on the root bus in order to make it
+ * non-hotpluggable, find.bus will match the root bus when bsel
+ * is 0. See acpi_pcihp_test_hotplug_bus() above. Since the
+ * bus is not hotpluggable however, we should not select the bus.
+ * Instead, we should set find.bus to NULL in that case. In the check
+ * below, we generalize this case for all buses, not just the root bus.
+ * The callers of this function check for a null return value and
+ * handle them appropriately.
+ */
+ if (find.bus && !qbus_is_hotpluggable(BUS(find.bus))) {
+ find.bus = NULL;
+ }
return find.bus;
}
PCIDevice *dev = PCI_DEVICE(qdev);
if (PCI_SLOT(dev->devfn) == slot) {
if (!acpi_pcihp_pc_no_hotplug(s, dev)) {
- hotplug_ctrl = qdev_get_hotplug_handler(qdev);
- hotplug_handler_unplug(hotplug_ctrl, qdev, &error_abort);
- object_unparent(OBJECT(qdev));
+ /*
+ * partially_hotplugged is used by virtio-net failover:
+ * failover has asked the guest OS to unplug the device
+ * but we need to keep some references to the device
+ * to be able to plug it back in case of failure so
+ * we don't execute hotplug_handler_unplug().
+ */
+ if (dev->partially_hotplugged) {
+ /*
+ * pending_deleted_event is set to true when
+ * virtio-net failover asks to unplug the device,
+ * and set to false here when the operation is done
+ * This is used by the migration loop to detect the
+ * end of the operation and really start the migration.
+ */
+ qdev->pending_deleted_event = false;
+ } else {
+ hotplug_ctrl = qdev_get_hotplug_handler(qdev);
+ hotplug_handler_unplug(hotplug_ctrl, qdev, &error_abort);
+ object_unparent(OBJECT(qdev));
+ }
}
}
}
acpi_pcihp_update(s);
}
+#define ONBOARD_INDEX_MAX (16 * 1024 - 1)
+
void acpi_pcihp_device_pre_plug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
+ PCIDevice *pdev = PCI_DEVICE(dev);
+
/* Only hotplugged devices need the hotplug capability. */
if (dev->hotplugged &&
- acpi_pcihp_get_bsel(pci_get_bus(PCI_DEVICE(dev))) < 0) {
+ acpi_pcihp_get_bsel(pci_get_bus(pdev)) < 0) {
error_setg(errp, "Unsupported bus. Bus doesn't have property '"
ACPI_PCIHP_PROP_BSEL "' set");
return;
}
+
+ /*
+ * capped by systemd (see: udev-builtin-net_id.c)
+ * as it's the only known user honor it to avoid users
+ * misconfigure QEMU and then wonder why acpi-index doesn't work
+ */
+ if (pdev->acpi_index > ONBOARD_INDEX_MAX) {
+ error_setg(errp, "acpi-index should be less or equal to %u",
+ ONBOARD_INDEX_MAX);
+ return;
+ }
+
+ /*
+ * make sure that acpi-index is unique across all present PCI devices
+ */
+ if (pdev->acpi_index) {
+ GSequence *used_indexes = pci_acpi_index_list();
+
+ if (g_sequence_lookup(used_indexes, GINT_TO_POINTER(pdev->acpi_index),
+ g_cmp_uint32, NULL)) {
+ error_setg(errp, "a PCI device with acpi-index = %" PRIu32
+ " already exist", pdev->acpi_index);
+ return;
+ }
+ g_sequence_insert_sorted(used_indexes,
+ GINT_TO_POINTER(pdev->acpi_index),
+ g_cmp_uint32, NULL);
+ }
}
void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
{
PCIDevice *pdev = PCI_DEVICE(dev);
int slot = PCI_SLOT(pdev->devfn);
+ PCIDevice *bridge;
+ PCIBus *bus;
int bsel;
/* Don't send event when device is enabled during qemu machine creation:
object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) {
PCIBus *sec = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev));
+ /* Remove all hot-plug handlers if hot-plug is disabled on slot */
+ if (object_dynamic_cast(OBJECT(dev), TYPE_PCIE_SLOT) &&
+ !PCIE_SLOT(pdev)->hotplug) {
+ qbus_set_hotplug_handler(BUS(sec), NULL);
+ return;
+ }
+
qbus_set_hotplug_handler(BUS(sec), OBJECT(hotplug_dev));
/* We don't have to overwrite any other hotplug handler yet */
assert(QLIST_EMPTY(&sec->child));
return;
}
- bsel = acpi_pcihp_get_bsel(pci_get_bus(pdev));
+ bus = pci_get_bus(pdev);
+ bridge = pci_bridge_get_device(bus);
+ if (object_dynamic_cast(OBJECT(bridge), TYPE_PCIE_ROOT_PORT) ||
+ object_dynamic_cast(OBJECT(bridge), TYPE_XIO3130_DOWNSTREAM)) {
+ pcie_cap_slot_enable_power(bridge);
+ }
+
+ bsel = acpi_pcihp_get_bsel(bus);
g_assert(bsel >= 0);
s->acpi_pcihp_pci_status[bsel].up |= (1U << slot);
acpi_send_event(DEVICE(hotplug_dev), ACPI_PCI_HOTPLUG_STATUS);
void acpi_pcihp_device_unplug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
DeviceState *dev, Error **errp)
{
- trace_acpi_pci_unplug(PCI_SLOT(PCI_DEVICE(dev)->devfn),
- acpi_pcihp_get_bsel(pci_get_bus(PCI_DEVICE(dev))));
+ PCIDevice *pdev = PCI_DEVICE(dev);
+
+ trace_acpi_pci_unplug(PCI_SLOT(pdev->devfn),
+ acpi_pcihp_get_bsel(pci_get_bus(pdev)));
+
+ /*
+ * clean up acpi-index so it could reused by another device
+ */
+ if (pdev->acpi_index) {
+ GSequence *used_indexes = pci_acpi_index_list();
+
+ g_sequence_remove(g_sequence_lookup(used_indexes,
+ GINT_TO_POINTER(pdev->acpi_index),
+ g_cmp_uint32, NULL));
+ }
+
qdev_unrealize(dev);
}
return;
}
+ /*
+ * pending_deleted_event is used by virtio-net failover to detect the
+ * end of the unplug operation, the flag is set to false in
+ * acpi_pcihp_eject_slot() when the operation is completed.
+ */
+ pdev->qdev.pending_deleted_event = true;
s->acpi_pcihp_pci_status[bsel].down |= (1U << slot);
acpi_send_event(DEVICE(hotplug_dev), ACPI_PCI_HOTPLUG_STATUS);
}
trace_acpi_pci_down_read(val);
break;
case PCI_EJ_BASE:
- /* No feature defined yet */
trace_acpi_pci_features_read(val);
break;
case PCI_RMV_BASE:
case PCI_SEL_BASE:
val = s->hotplug_select;
trace_acpi_pci_sel_read(val);
+ break;
+ case PCI_AIDX_BASE:
+ val = s->acpi_index;
+ s->acpi_index = 0;
+ trace_acpi_pci_acpi_index_read(val);
+ break;
default:
break;
}
static void pci_write(void *opaque, hwaddr addr, uint64_t data,
unsigned int size)
{
+ int slot;
+ PCIBus *bus;
+ BusChild *kid, *next;
AcpiPciHpState *s = opaque;
+
+ s->acpi_index = 0;
switch (addr) {
+ case PCI_AIDX_BASE:
+ /*
+ * fetch acpi-index for specified slot so that follow up read from
+ * PCI_AIDX_BASE can return it to guest
+ */
+ slot = ctz32(data);
+
+ if (s->hotplug_select >= ACPI_PCIHP_MAX_HOTPLUG_BUS) {
+ break;
+ }
+
+ bus = acpi_pcihp_find_hotplug_bus(s, s->hotplug_select);
+ if (!bus) {
+ break;
+ }
+ QTAILQ_FOREACH_SAFE(kid, &bus->qbus.children, sibling, next) {
+ Object *o = OBJECT(kid->child);
+ PCIDevice *dev = PCI_DEVICE(o);
+ if (PCI_SLOT(dev->devfn) == slot) {
+ s->acpi_index = object_property_get_uint(o, "acpi-index", NULL);
+ break;
+ }
+ }
+ trace_acpi_pci_acpi_index_write(s->hotplug_select, slot, s->acpi_index);
+ break;
case PCI_EJ_BASE:
if (s->hotplug_select >= ACPI_PCIHP_MAX_HOTPLUG_BUS) {
break;
};
void acpi_pcihp_init(Object *owner, AcpiPciHpState *s, PCIBus *root_bus,
- MemoryRegion *address_space_io, bool bridges_enabled)
+ MemoryRegion *address_space_io, bool bridges_enabled,
+ uint16_t io_base)
{
s->io_len = ACPI_PCIHP_SIZE;
- s->io_base = ACPI_PCIHP_ADDR;
+ s->io_base = io_base;
- s->root= root_bus;
+ s->root = root_bus;
s->legacy_piix = !bridges_enabled;
memory_region_init_io(&s->io, owner, &acpi_pcihp_io_ops, s,
OBJ_PROP_FLAG_READ);
}
+bool vmstate_acpi_pcihp_use_acpi_index(void *opaque, int version_id)
+{
+ AcpiPciHpState *s = opaque;
+ return s->acpi_index;
+}
+
const VMStateDescription vmstate_acpi_pcihp_pci_status = {
.name = "acpi_pcihp_pci_status",
.version_id = 1,
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