[Qemu-devel] [PATCH RFC 6/6] hw/ich9: enable acpi pci hotplug

[Aleksandr Bezzubikov <zuban32s@gmail.com>]

Signed-off-by: Aleksandr Bezzubikov <zuban32s@gmail.com>
---
 hw/acpi/ich9.c         | 31 +++++++++++++++++++++++++++++++
 hw/isa/lpc_ich9.c      | 12 ++++++++++++
 include/hw/acpi/ich9.h |  4 ++++
 include/hw/i386/pc.h   |  7 ++++++-
 4 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
index 5c279bb..25339eb 100644
--- a/hw/acpi/ich9.c
+++ b/hw/acpi/ich9.c
@@ -258,6 +258,7 @@ static void pm_reset(void *opaque)
     }
     pm->smi_en_wmask = ~0;
 
+    acpi_pcihp_reset(&pm->acpi_pci_hotplug);
     acpi_update_sci(&pm->acpi_regs, pm->irq);
 }
 
@@ -301,6 +302,10 @@ void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm,
     pm->powerdown_notifier.notify = pm_powerdown_req;
     qemu_register_powerdown_notifier(&pm->powerdown_notifier);
 
+    acpi_pcihp_init(OBJECT(lpc_pci), &pm->acpi_pci_hotplug, lpc_pci->bus,
+                    pci_address_space_io(lpc_pci),
+                    pm->use_acpi_pci_hotplug);
+
     legacy_acpi_cpu_hotplug_init(pci_address_space_io(lpc_pci),
         OBJECT(lpc_pci), &pm->gpe_cpu, ICH9_CPU_HOTPLUG_IO_BASE);
 
@@ -335,6 +340,21 @@ static void ich9_pm_set_memory_hotplug_support(Object *obj, bool value,
     s->pm.acpi_memory_hotplug.is_enabled = value;
 }
 
+static bool ich9_pm_get_acpi_pci_hotplug_support(Object *obj, Error **errp)
+{
+    ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
+
+    return s->pm.use_acpi_pci_hotplug;
+}
+
+static void ich9_pm_set_acpi_pci_hotplug_support(Object *obj, bool value,
+                                                 Error **errp)
+{
+    ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
+
+    s->pm.use_acpi_pci_hotplug = value;
+}
+
 static bool ich9_pm_get_cpu_hotplug_legacy(Object *obj, Error **errp)
 {
     ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
@@ -446,6 +466,7 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp)
 {
     static const uint32_t gpe0_len = ICH9_PMIO_GPE0_LEN;
     pm->acpi_memory_hotplug.is_enabled = true;
+    pm->use_acpi_pci_hotplug = true;
     pm->cpu_hotplug_legacy = true;
     pm->disable_s3 = 0;
     pm->disable_s4 = 0;
@@ -462,6 +483,10 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp)
                              ich9_pm_get_memory_hotplug_support,
                              ich9_pm_set_memory_hotplug_support,
                              NULL);
+    object_property_add_bool(obj, "acpi-pci-hotplug-with-bridge-support",
+                             ich9_pm_get_acpi_pci_hotplug_support,
+                             ich9_pm_set_acpi_pci_hotplug_support,
+                             NULL);
     object_property_add_bool(obj, "cpu-hotplug-legacy",
                              ich9_pm_get_cpu_hotplug_legacy,
                              ich9_pm_set_cpu_hotplug_legacy,
@@ -497,6 +522,9 @@ void ich9_pm_device_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
             acpi_memory_plug_cb(hotplug_dev, &lpc->pm.acpi_memory_hotplug,
                                 dev, errp);
         }
+    } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
+        acpi_pcihp_device_plug_cb(hotplug_dev, &lpc->pm.acpi_pci_hotplug,
+                                  dev, errp);
     } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
         if (lpc->pm.cpu_hotplug_legacy) {
             legacy_acpi_cpu_plug_cb(hotplug_dev, &lpc->pm.gpe_cpu, dev, errp);
@@ -519,6 +547,9 @@ void ich9_pm_device_unplug_request_cb(HotplugHandler *hotplug_dev,
         acpi_memory_unplug_request_cb(hotplug_dev,
                                       &lpc->pm.acpi_memory_hotplug, dev,
                                       errp);
+    } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
+        acpi_pcihp_device_unplug_cb(hotplug_dev, &lpc->pm.acpi_pci_hotplug,
+                                    dev, errp);
     } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) &&
                !lpc->pm.cpu_hotplug_legacy) {
         acpi_cpu_unplug_request_cb(hotplug_dev, &lpc->pm.cpuhp_state,
diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
index e2215dc..13574d0 100644
--- a/hw/isa/lpc_ich9.c
+++ b/hw/isa/lpc_ich9.c
@@ -33,6 +33,7 @@
 #include "hw/hw.h"
 #include "qapi/visitor.h"
 #include "qemu/range.h"
+#include "qapi/error.h"
 #include "hw/isa/isa.h"
 #include "hw/sysbus.h"
 #include "hw/i386/pc.h"
@@ -574,6 +575,15 @@ static const MemoryRegionOps rcrb_mmio_ops = {
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
+static void ich9_update_bus_hotplug(PCIBus *pci_bus, void *opaque)
+{
+    ICH9LPCState *s = opaque;
+
+    if (!pci_bus_is_express(pci_bus)) {
+        qbus_set_hotplug_handler(BUS(pci_bus), DEVICE(s), &error_abort);
+    }
+}
+
 static void ich9_lpc_machine_ready(Notifier *n, void *opaque)
 {
     ICH9LPCState *s = container_of(n, ICH9LPCState, machine_ready);
@@ -597,6 +607,8 @@ static void ich9_lpc_machine_ready(Notifier *n, void *opaque)
         /* floppy */
         pci_conf[0x82] |= 0x08;
     }
+
+    pci_for_each_bus(s->d.bus, ich9_update_bus_hotplug, s);
 }
 
 /* reset control */
diff --git a/include/hw/acpi/ich9.h b/include/hw/acpi/ich9.h
index a352c94..e1df363 100644
--- a/include/hw/acpi/ich9.h
+++ b/include/hw/acpi/ich9.h
@@ -22,6 +22,7 @@
 #define HW_ACPI_ICH9_H
 
 #include "hw/acpi/acpi.h"
+#include "hw/acpi/pcihp.h"
 #include "hw/acpi/cpu_hotplug.h"
 #include "hw/acpi/cpu.h"
 #include "hw/acpi/memory_hotplug.h"
@@ -55,6 +56,9 @@ typedef struct ICH9LPCPMRegs {
 
     MemHotplugState acpi_memory_hotplug;
 
+    AcpiPciHpState acpi_pci_hotplug;
+    bool use_acpi_pci_hotplug;
+
     uint8_t disable_s3;
     uint8_t disable_s4;
     uint8_t s4_val;
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index e447f5d..0d4e8b2 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -464,7 +464,12 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
     },
 
 #define PC_COMPAT_2_5 \
-    HW_COMPAT_2_5
+    HW_COMPAT_2_5 \
+    {\
+        .driver   = "ICH9-LPC",\
+        .property = "acpi-pci-hotplug-with-bridge-support",\
+        .value    = "off",\
+    },
 
 /* Helper for setting model-id for CPU models that changed model-id
  * depending on QEMU versions up to QEMU 2.4.
-- 
2.7.4