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-rw-r--r--hw/acpi/pci.c1
-rw-r--r--hw/acpi/pcihp.c58
-rw-r--r--hw/acpi/piix4.c3
-rw-r--r--hw/acpi/trace-events2
-rw-r--r--hw/i386/acpi-build.c13
-rw-r--r--hw/pci/pci.c1
-rw-r--r--include/hw/acpi/pcihp.h9
-rw-r--r--include/hw/pci/pci.h1
8 files changed, 81 insertions, 7 deletions
diff --git a/hw/acpi/pci.c b/hw/acpi/pci.c
index ec455c3b25..75b1103ec4 100644
--- a/hw/acpi/pci.c
+++ b/hw/acpi/pci.c
@@ -59,4 +59,3 @@ void build_mcfg(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info,
     build_header(linker, table_data, (void *)(table_data->data + mcfg_start),
                  "MCFG", table_data->len - mcfg_start, 1, oem_id, oem_table_id);
 }
-
diff --git a/hw/acpi/pcihp.c b/hw/acpi/pcihp.c
index 9dc4d3e2db..ceab287bd3 100644
--- a/hw/acpi/pcihp.c
+++ b/hw/acpi/pcihp.c
@@ -39,12 +39,13 @@
 #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;
@@ -251,9 +252,13 @@ void acpi_pcihp_reset(AcpiPciHpState *s, bool acpihp_root_off)
     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) {
@@ -261,6 +266,17 @@ void acpi_pcihp_device_pre_plug_cb(HotplugHandler *hotplug_dev,
                    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;
+    }
 }
 
 void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
@@ -347,7 +363,6 @@ static uint64_t pci_read(void *opaque, hwaddr addr, unsigned int size)
         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:
@@ -357,6 +372,12 @@ static uint64_t pci_read(void *opaque, hwaddr addr, unsigned int size)
     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;
     }
@@ -367,8 +388,35 @@ static uint64_t pci_read(void *opaque, hwaddr addr, unsigned int size)
 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);
+        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;
@@ -413,6 +461,12 @@ void acpi_pcihp_init(Object *owner, AcpiPciHpState *s, PCIBus *root_bus,
                                    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,
diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 1efc0ded9f..6056d51667 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -297,7 +297,8 @@ static const VMStateDescription vmstate_acpi = {
             2, vmstate_pci_status,
             struct AcpiPciHpPciStatus),
         VMSTATE_PCI_HOTPLUG(acpi_pci_hotplug, PIIX4PMState,
-                            vmstate_test_use_acpi_hotplug_bridge),
+                            vmstate_test_use_acpi_hotplug_bridge,
+                            vmstate_acpi_pcihp_use_acpi_index),
         VMSTATE_END_OF_LIST()
     },
     .subsections = (const VMStateDescription*[]) {
diff --git a/hw/acpi/trace-events b/hw/acpi/trace-events
index f91ced477d..dcc1438f3a 100644
--- a/hw/acpi/trace-events
+++ b/hw/acpi/trace-events
@@ -41,6 +41,8 @@ acpi_pci_unplug_request(int bsel, int slot) "bsel: %d slot: %d"
 acpi_pci_up_read(uint32_t val) "%" PRIu32
 acpi_pci_down_read(uint32_t val) "%" PRIu32
 acpi_pci_features_read(uint32_t val) "%" PRIu32
+acpi_pci_acpi_index_read(uint32_t val) "%" PRIu32
+acpi_pci_acpi_index_write(unsigned bsel, unsigned slot, uint32_t aidx) "bsel: %u slot: %u aidx: %" PRIu32
 acpi_pci_rmv_read(uint32_t val) "%" PRIu32
 acpi_pci_sel_read(uint32_t val) "%" PRIu32
 acpi_pci_ej_write(uint64_t addr, uint64_t data) "0x%" PRIx64 " <== %" PRIu64
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 442b4629a9..e49fae2bfd 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1168,9 +1168,10 @@ static void build_piix4_pci_hotplug(Aml *table)
     aml_append(scope, field);
 
     aml_append(scope,
-        aml_operation_region("BNMR", AML_SYSTEM_IO, aml_int(0xae10), 0x04));
+        aml_operation_region("BNMR", AML_SYSTEM_IO, aml_int(0xae10), 0x08));
     field = aml_field("BNMR", AML_DWORD_ACC, AML_NOLOCK, AML_WRITE_AS_ZEROS);
     aml_append(field, aml_named_field("BNUM", 32));
+    aml_append(field, aml_named_field("PIDX", 32));
     aml_append(scope, field);
 
     aml_append(scope, aml_mutex("BLCK", 0));
@@ -1184,6 +1185,16 @@ static void build_piix4_pci_hotplug(Aml *table)
     aml_append(method, aml_return(aml_int(0)));
     aml_append(scope, method);
 
+    method = aml_method("AIDX", 2, AML_NOTSERIALIZED);
+    aml_append(method, aml_acquire(aml_name("BLCK"), 0xFFFF));
+    aml_append(method, aml_store(aml_arg(0), aml_name("BNUM")));
+    aml_append(method,
+        aml_store(aml_shiftleft(aml_int(1), aml_arg(1)), aml_name("PIDX")));
+    aml_append(method, aml_store(aml_name("PIDX"), aml_local(0)));
+    aml_append(method, aml_release(aml_name("BLCK")));
+    aml_append(method, aml_return(aml_local(0)));
+    aml_append(scope, method);
+
     aml_append(table, scope);
 }
 
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 0eadcdbc9e..ac9a24889c 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -79,6 +79,7 @@ static Property pci_props[] = {
                     QEMU_PCIE_EXTCAP_INIT_BITNR, true),
     DEFINE_PROP_STRING("failover_pair_id", PCIDevice,
                        failover_pair_id),
+    DEFINE_PROP_UINT32("acpi-index",  PCIDevice, acpi_index, 0),
     DEFINE_PROP_END_OF_LIST()
 };
 
diff --git a/include/hw/acpi/pcihp.h b/include/hw/acpi/pcihp.h
index dfd375820f..2dd90aea30 100644
--- a/include/hw/acpi/pcihp.h
+++ b/include/hw/acpi/pcihp.h
@@ -46,6 +46,7 @@ typedef struct AcpiPciHpPciStatus {
 typedef struct AcpiPciHpState {
     AcpiPciHpPciStatus acpi_pcihp_pci_status[ACPI_PCIHP_MAX_HOTPLUG_BUS];
     uint32_t hotplug_select;
+    uint32_t acpi_index;
     PCIBus *root;
     MemoryRegion io;
     bool legacy_piix;
@@ -71,13 +72,17 @@ void acpi_pcihp_reset(AcpiPciHpState *s, bool acpihp_root_off);
 
 extern const VMStateDescription vmstate_acpi_pcihp_pci_status;
 
-#define VMSTATE_PCI_HOTPLUG(pcihp, state, test_pcihp) \
+bool vmstate_acpi_pcihp_use_acpi_index(void *opaque, int version_id);
+
+#define VMSTATE_PCI_HOTPLUG(pcihp, state, test_pcihp, test_acpi_index) \
         VMSTATE_UINT32_TEST(pcihp.hotplug_select, state, \
                             test_pcihp), \
         VMSTATE_STRUCT_ARRAY_TEST(pcihp.acpi_pcihp_pci_status, state, \
                                   ACPI_PCIHP_MAX_HOTPLUG_BUS, \
                                   test_pcihp, 1, \
                                   vmstate_acpi_pcihp_pci_status, \
-                                  AcpiPciHpPciStatus)
+                                  AcpiPciHpPciStatus), \
+        VMSTATE_UINT32_TEST(pcihp.acpi_index, state, \
+                            test_acpi_index)
 
 #endif
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 1bc231480f..6be4e0c460 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -359,6 +359,7 @@ struct PCIDevice {
 
     /* ID of standby device in net_failover pair */
     char *failover_pair_id;
+    uint32_t acpi_index;
 };
 
 void pci_register_bar(PCIDevice *pci_dev, int region_num,