it basicaly does the same as original approach,
* just without bus/notify tables tracking (less obscure)
which is easier to follow.
* drops unnecessary loops and bitmaps,
creating devices and notification method in the same loop.
* saves us ~100LOC
Signed-off-by: Igor Mammedov <imamm...@redhat.com>
---
v2:
* fixed 'make check' failure on Q35, which was caused by
adding slots for non present devices when ACPI
hotplug is disabled
* fixed 'make check' failure on Q35, which was caused by
marking devices as hotpluggable when ACPI hotplug is disabled
---
hw/i386/acpi-build.c | 274 ++++++++++++++++-----------------------------------
1 file changed, 85 insertions(+), 189 deletions(-)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 05eb80a..ba056f0 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -112,7 +112,6 @@ typedef struct AcpiPmInfo {
typedef struct AcpiMiscInfo {
bool has_hpet;
bool has_tpm;
- DECLARE_BITMAP(slot_hotplug_enable, PCI_SLOT_MAX);
const unsigned char *dsdt_code;
unsigned dsdt_size;
uint16_t pvpanic_port;
@@ -591,74 +590,37 @@ static void acpi_set_pci_info(void)
}
}
-static void build_pci_bus_state_init(AcpiBuildPciBusHotplugState *state,
- AcpiBuildPciBusHotplugState *parent,
- bool pcihp_bridge_en)
+static void build_append_pcihp_notify_entry(GArray *method, int slot)
{
- state->parent = parent;
- state->device_table = build_alloc_array();
- state->notify_table = build_alloc_array();
- state->pcihp_bridge_en = pcihp_bridge_en;
+ GArray *ifctx;
+
+ ifctx = build_alloc_array();
+ build_append_byte(ifctx, 0x7B); /* AndOp */
+ build_append_byte(ifctx, 0x68); /* Arg0Op */
+ build_append_int(ifctx, 0x1U << slot);
+ build_append_byte(ifctx, 0x00); /* NullName */
+ build_append_byte(ifctx, 0x86); /* NotifyOp */
+ build_append_namestring(ifctx, "S%.02X", PCI_DEVFN(slot, 0));
+ build_append_byte(ifctx, 0x69); /* Arg1Op */
+
+ /* Pack it up */
+ build_package(ifctx, 0xA0 /* IfOp */);
+ build_append_array(method, ifctx);
+ build_free_array(ifctx);
}
-static void build_pci_bus_state_cleanup(AcpiBuildPciBusHotplugState *state)
+static void build_append_pci_bus_devices(GArray *parent_scope, PCIBus *bus,
+ bool pcihp_bridge_en)
{
- build_free_array(state->device_table);
- build_free_array(state->notify_table);
-}
-
-static void *build_pci_bus_begin(PCIBus *bus, void *parent_state)
-{
- AcpiBuildPciBusHotplugState *parent = parent_state;
- AcpiBuildPciBusHotplugState *child = g_malloc(sizeof *child);
-
- build_pci_bus_state_init(child, parent, parent->pcihp_bridge_en);
-
- return child;
-}
-
-static void build_pci_bus_end(PCIBus *bus, void *bus_state)
-{
- AcpiBuildPciBusHotplugState *child = bus_state;
- AcpiBuildPciBusHotplugState *parent = child->parent;
GArray *bus_table = build_alloc_array();
- DECLARE_BITMAP(slot_hotplug_enable, PCI_SLOT_MAX);
- DECLARE_BITMAP(slot_device_present, PCI_SLOT_MAX);
- DECLARE_BITMAP(slot_device_system, PCI_SLOT_MAX);
- DECLARE_BITMAP(slot_device_vga, PCI_SLOT_MAX);
- DECLARE_BITMAP(slot_device_qxl, PCI_SLOT_MAX);
- uint8_t op;
- int i;
+ GArray *method = NULL;
QObject *bsel;
- GArray *method;
- bool bus_hotplug_support = false;
-
- /*
- * Skip bridge subtree creation if bridge hotplug is disabled
- * to make acpi tables compatible with legacy machine types.
- * Skip creation for hotplugged bridges as well.
- */
- if (bus->parent_dev && (!child->pcihp_bridge_en ||
- DEVICE(bus->parent_dev)->hotplugged)) {
- build_free_array(bus_table);
- build_pci_bus_state_cleanup(child);
- g_free(child);
- return;
- }
+ PCIBus *sec;
+ int i;
if (bus->parent_dev) {
- op = 0x82; /* DeviceOp */
- build_append_namestring(bus_table, "S%.02X",
- bus->parent_dev->devfn);
- build_append_byte(bus_table, 0x08); /* NameOp */
- build_append_namestring(bus_table, "_SUN");
- build_append_int(bus_table, PCI_SLOT(bus->parent_dev->devfn));
- build_append_byte(bus_table, 0x08); /* NameOp */
- build_append_namestring(bus_table, "_ADR");
- build_append_int(bus_table, (PCI_SLOT(bus->parent_dev->devfn) << 16) |
- PCI_FUNC(bus->parent_dev->devfn));
+ build_append_namestring(bus_table, "S%.02X_", bus->parent_dev->devfn);
} else {
- op = 0x10; /* ScopeOp */;
build_append_namestring(bus_table, "PCI0");
}
@@ -667,29 +629,28 @@ static void build_pci_bus_end(PCIBus *bus, void
*bus_state)
build_append_byte(bus_table, 0x08); /* NameOp */
build_append_namestring(bus_table, "BSEL");
build_append_int(bus_table, qint_get_int(qobject_to_qint(bsel)));
- memset(slot_hotplug_enable, 0xff, sizeof slot_hotplug_enable);
- } else {
- /* No bsel - no slots are hot-pluggable */
- memset(slot_hotplug_enable, 0x00, sizeof slot_hotplug_enable);
+ method = build_alloc_method("DVNT", 2);
}
- memset(slot_device_present, 0x00, sizeof slot_device_present);
- memset(slot_device_system, 0x00, sizeof slot_device_present);
- memset(slot_device_vga, 0x00, sizeof slot_device_vga);
- memset(slot_device_qxl, 0x00, sizeof slot_device_qxl);
-
for (i = 0; i < ARRAY_SIZE(bus->devices); i += PCI_FUNC_MAX) {
DeviceClass *dc;
PCIDeviceClass *pc;
PCIDevice *pdev = bus->devices[i];
int slot = PCI_SLOT(i);
+ bool hotplug_enabled_dev;
bool bridge_in_acpi;
if (!pdev) {
+ if (bsel) { /* add hotplug slots for non present devices */
+ void *pcihp = acpi_data_push(bus_table, ACPI_PCIHP_SIZEOF);
+ memcpy(pcihp, ACPI_PCIHP_AML, ACPI_PCIHP_SIZEOF);
+ patch_pcihp(slot, pcihp);
+
+ build_append_pcihp_notify_entry(method, slot);
+ }
continue;
}
- set_bit(slot, slot_device_present);
pc = PCI_DEVICE_GET_CLASS(pdev);
dc = DEVICE_GET_CLASS(pdev);
@@ -698,142 +659,83 @@ static void build_pci_bus_end(PCIBus *bus, void
*bus_state)
* In this case they aren't themselves hot-pluggable.
* Hotplugged bridges *are* hot-pluggable.
*/
- bridge_in_acpi = pc->is_bridge && child->pcihp_bridge_en &&
- !DEVICE(pdev)->hotplugged;
+ bridge_in_acpi = pc->is_bridge && pcihp_bridge_en &&
+ !DEVICE(pdev)->hotplugged;
- if (pc->class_id == PCI_CLASS_BRIDGE_ISA || bridge_in_acpi) {
- set_bit(slot, slot_device_system);
+ hotplug_enabled_dev = bsel && dc->hotpluggable && !bridge_in_acpi;
+
+ if (pc->class_id == PCI_CLASS_BRIDGE_ISA) {
+ continue;
}
if (pc->class_id == PCI_CLASS_DISPLAY_VGA) {
- set_bit(slot, slot_device_vga);
-
if (object_dynamic_cast(OBJECT(pdev), "qxl-vga")) {
- set_bit(slot, slot_device_qxl);
+ void *pcihp = acpi_data_push(bus_table,
+ ACPI_PCIQXL_SIZEOF);
+ memcpy(pcihp, ACPI_PCIQXL_AML, ACPI_PCIQXL_SIZEOF);
+ patch_pciqxl(slot, pcihp);
+ } else {
+ void *pcihp = acpi_data_push(bus_table,
+ ACPI_PCIVGA_SIZEOF);
+ memcpy(pcihp, ACPI_PCIVGA_AML, ACPI_PCIVGA_SIZEOF);
+ patch_pcivga(slot, pcihp);
}
- }
-
- if (!dc->hotpluggable || bridge_in_acpi) {
- clear_bit(slot, slot_hotplug_enable);
- }
- }
+ } else if (hotplug_enabled_dev) {
+ void *pcihp = acpi_data_push(bus_table, ACPI_PCIHP_SIZEOF);
- /* Append Device object for each slot */
- for (i = 0; i < PCI_SLOT_MAX; i++) {
- bool can_eject = test_bit(i, slot_hotplug_enable);
- bool present = test_bit(i, slot_device_present);
- bool vga = test_bit(i, slot_device_vga);
- bool qxl = test_bit(i, slot_device_qxl);
- bool system = test_bit(i, slot_device_system);
- if (can_eject) {
- void *pcihp = acpi_data_push(bus_table,
- ACPI_PCIHP_SIZEOF);
memcpy(pcihp, ACPI_PCIHP_AML, ACPI_PCIHP_SIZEOF);
- patch_pcihp(i, pcihp);
- bus_hotplug_support = true;
- } else if (qxl) {
- void *pcihp = acpi_data_push(bus_table,
- ACPI_PCIQXL_SIZEOF);
- memcpy(pcihp, ACPI_PCIQXL_AML, ACPI_PCIQXL_SIZEOF);
- patch_pciqxl(i, pcihp);
- } else if (vga) {
- void *pcihp = acpi_data_push(bus_table,
- ACPI_PCIVGA_SIZEOF);
- memcpy(pcihp, ACPI_PCIVGA_AML, ACPI_PCIVGA_SIZEOF);
- patch_pcivga(i, pcihp);
- } else if (system) {
- /* Nothing to do: system devices are in DSDT or in SSDT above. */
- } else if (present) {
- void *pcihp = acpi_data_push(bus_table,
- ACPI_PCINOHP_SIZEOF);
+ patch_pcihp(slot, pcihp);
+ build_append_pcihp_notify_entry(method, slot);
+ } else if (bridge_in_acpi) {
+ PCIBus *sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev));
+ void *pcihp = acpi_data_push(bus_table, ACPI_PCINOHP_SIZEOF);
+
+ memcpy(pcihp, ACPI_PCINOHP_AML, ACPI_PCINOHP_SIZEOF);
+ patch_pcinohp(slot, pcihp);
+ build_append_pci_bus_devices(bus_table, sec_bus, pcihp_bridge_en);
+ } else { /* non hotpluggable present devices */
+ void *pcihp = acpi_data_push(bus_table, ACPI_PCINOHP_SIZEOF);
+
memcpy(pcihp, ACPI_PCINOHP_AML, ACPI_PCINOHP_SIZEOF);
- patch_pcinohp(i, pcihp);
+ patch_pcinohp(slot, pcihp);
}
}
if (bsel) {
- method = build_alloc_method("DVNT", 2);
-
- for (i = 0; i < PCI_SLOT_MAX; i++) {
- GArray *notify;
- uint8_t op;
-
- if (!test_bit(i, slot_hotplug_enable)) {
- continue;
- }
-
- notify = build_alloc_array();
- op = 0xA0; /* IfOp */
-
- build_append_byte(notify, 0x7B); /* AndOp */
- build_append_byte(notify, 0x68); /* Arg0Op */
- build_append_int(notify, 0x1U << i);
- build_append_byte(notify, 0x00); /* NullName */
- build_append_byte(notify, 0x86); /* NotifyOp */
- build_append_namestring(notify, "S%.02X", PCI_DEVFN(i, 0));
- build_append_byte(notify, 0x69); /* Arg1Op */
-
- /* Pack it up */
- build_package(notify, op);
-
- build_append_array(method, notify);
-
- build_free_array(notify);
- }
-
build_append_and_cleanup_method(bus_table, method);
}
/* Append PCNT method to notify about events on local and child buses.
* Add unconditionally for root since DSDT expects it.
*/
- if (bus_hotplug_support || child->notify_table->len || !bus->parent_dev) {
- method = build_alloc_method("PCNT", 0);
-
- /* If bus supports hotplug select it and notify about local events */
- if (bsel) {
- build_append_byte(method, 0x70); /* StoreOp */
- build_append_int(method, qint_get_int(qobject_to_qint(bsel)));
- build_append_namestring(method, "BNUM");
- build_append_namestring(method, "DVNT");
- build_append_namestring(method, "PCIU");
- build_append_int(method, 1); /* Device Check */
- build_append_namestring(method, "DVNT");
- build_append_namestring(method, "PCID");
- build_append_int(method, 3); /* Eject Request */
- }
-
- /* Notify about child bus events in any case */
- build_append_array(method, child->notify_table);
-
- build_append_and_cleanup_method(bus_table, method);
-
- /* Append description of child buses */
- build_append_array(bus_table, child->device_table);
-
- /* Pack it up */
- if (bus->parent_dev) {
- build_extop_package(bus_table, op);
- } else {
- build_package(bus_table, op);
- }
+ method = build_alloc_method("PCNT", 0);
- /* Append our bus description to parent table */
- build_append_array(parent->device_table, bus_table);
+ /* If bus supports hotplug select it and notify about local events */
+ if (bsel) {
+ build_append_byte(method, 0x70); /* StoreOp */
+ build_append_int(method, qint_get_int(qobject_to_qint(bsel)));
+ build_append_namestring(method, "BNUM");
+ build_append_namestring(method, "DVNT");
+ build_append_namestring(method, "PCIU");
+ build_append_int(method, 1); /* Device Check */
+ build_append_namestring(method, "DVNT");
+ build_append_namestring(method, "PCID");
+ build_append_int(method, 3); /* Eject Request */
+ }
- /* Also tell parent how to notify us, invoking PCNT method.
- * At the moment this is not needed for root as we have a single root.
- */
- if (bus->parent_dev) {
- build_append_namestring(parent->notify_table, "^PCNT.S%.02X",
- bus->parent_dev->devfn);
+ /* Notify about child bus events in any case */
+ if (pcihp_bridge_en) {
+ QLIST_FOREACH(sec, &bus->child, sibling) {
+ build_append_namestring(method, "^S%.02X.PCNT",
+ sec->parent_dev->devfn);
}
}
- qobject_decref(bsel);
+ build_append_and_cleanup_method(bus_table, method);
+
+ build_package(bus_table, 0x10); /* ScopeOp */
+ build_append_array(parent_scope, bus_table);
build_free_array(bus_table);
- build_pci_bus_state_cleanup(child);
- g_free(child);
}
static void
@@ -1175,7 +1077,6 @@ build_ssdt(GArray *table_data, GArray *linker,
aml_append(sb_scope, method);
{
- AcpiBuildPciBusHotplugState hotplug_state;
Object *pci_host;
PCIBus *bus = NULL;
bool ambiguous;
@@ -1185,16 +1086,11 @@ build_ssdt(GArray *table_data, GArray *linker,
bus = PCI_HOST_BRIDGE(pci_host)->bus;
}
- build_pci_bus_state_init(&hotplug_state, NULL,
pm->pcihp_bridge_en);
-
if (bus) {
/* Scan all PCI buses. Generate tables to support hotplug. */
- pci_for_each_bus_depth_first(bus, build_pci_bus_begin,
- build_pci_bus_end,
&hotplug_state);
+ build_append_pci_bus_devices(sb_scope->buf, bus,
+ pm->pcihp_bridge_en);
}
-
- build_append_array(sb_scope->buf, hotplug_state.device_table);
- build_pci_bus_state_cleanup(&hotplug_state);
}
aml_append(ssdt, sb_scope);
}
--
1.8.3.1
