Merge remote-tracking branch 'mst/tags/for_anthony' into staging

virtio,pci,qom

Work by Alex to support VGA assignment,
pci and virtio fixes by Stefan, Jason and myself, and a
new qmp event for hotplug support by myself.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Tue 26 Mar 2013 02:02:24 PM CDT using RSA key ID D28D5469
# gpg: Can't check signature: public key not found

# By Alex Williamson (13) and others
# Via Michael S. Tsirkin
* mst/tags/for_anthony: (23 commits)
  pcie: Add endpoint capability initialization wrapper
  roms: switch oldnoconfig to olddefconfig
  pcie: Mangle types to match topology
  pci: Create and use API to determine root buses
  pci: Create pci_bus_is_express helper
  pci: Q35, Root Ports, and Switches create PCI Express buses
  pci: Allow PCI bus creation interfaces to specify the type of bus
  pci: Move PCI and PCIE type defines
  pci: Create and register a new PCI Express TypeInfo
  exec: assert that RAMBlock size is non-zero
  pci: refuse empty ROM files
  pci_bridge: Remove duplicate IRQ swizzle function
  pci_bridge: Use a default map_irq function
  pci: Fix INTx routing notifier recursion
  pci_bridge: drop formatting from source
  pci_bridge: factor out common code
  pci: Teach PCI Bridges about VGA routing
  pci: Add PCI VGA helpers
  virtio-pci: guest notifier mask without non-irqfd
  virtio-net: remove layout assumptions for mq ctrl
  ...

QMP/qmp-events.txt

@@ -136,6 +136,24 @@ Example:
 Note: The "ready to complete" status is always reset by a BLOCK_JOB_ERROR
 event.
 
+DEVICE_DELETED
+-----------------
+
+Emitted whenever the device removal completion is acknowledged
+by the guest.
+At this point, it's safe to reuse the specified device ID.
+Device removal can be initiated by the guest or by HMP/QMP commands.
+
+Data:
+
+- "device": device name (json-string, optional)
+- "path": device path (json-string)
+
+{ "event": "DEVICE_DELETED",
+  "data": { "device": "virtio-net-pci-0",
+            "path": "/machine/peripheral/virtio-net-pci-0" },
+  "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
+
 DEVICE_TRAY_MOVED
 -----------------
 

exec.c

@@ -925,6 +925,8 @@ static ram_addr_t find_ram_offset(ram_addr_t size)
     RAMBlock *block, *next_block;
     ram_addr_t offset = RAM_ADDR_MAX, mingap = RAM_ADDR_MAX;
 
+    assert(size != 0); /* it would hand out same offset multiple times */
+
     if (QTAILQ_EMPTY(&ram_list.blocks))
         return 0;
 

hw/alpha_typhoon.c

@@ -775,7 +775,7 @@ PCIBus *typhoon_init(ram_addr_t ram_size, ISABus **isa_bus,
 
     b = pci_register_bus(dev, "pci",
                          typhoon_set_irq, sys_map_irq, s,
-                         &s->pchip.reg_mem, addr_space_io, 0, 64);
+                         &s->pchip.reg_mem, addr_space_io, 0, 64, TYPE_PCI_BUS);
     phb->bus = b;
 
     /* Pchip0 PCI special/interrupt acknowledge, 0x801.F800.0000, 64MB.  */

hw/apb_pci.c

@@ -329,7 +329,7 @@ static int apb_pci_bridge_initfn(PCIDevice *dev)
 {
     int rc;
 
-    rc = pci_bridge_initfn(dev);
+    rc = pci_bridge_initfn(dev, TYPE_PCI_BUS);
     if (rc < 0) {
         return rc;
     }
@@ -381,7 +381,7 @@ PCIBus *pci_apb_init(hwaddr special_base,
                               pci_apb_set_irq, pci_pbm_map_irq, d,
                               &d->pci_mmio,
                               get_system_io(),
-                              0, 32);
+                              0, 32, TYPE_PCI_BUS);
 
     *pbm_irqs = d->pbm_irqs;
     d->ivec_irqs = ivec_irqs;

hw/bonito.c

@@ -707,7 +707,7 @@ static int bonito_pcihost_initfn(SysBusDevice *dev)
     phb->bus = pci_register_bus(DEVICE(dev), "pci",
                                 pci_bonito_set_irq, pci_bonito_map_irq, dev,
                                 get_system_memory(), get_system_io(),
-                                0x28, 32);
+                                0x28, 32, TYPE_PCI_BUS);
 
     return 0;
 }

hw/dec_pci.c

@@ -51,12 +51,17 @@ static int dec_map_irq(PCIDevice *pci_dev, int irq_num)
     return irq_num;
 }
 
+static int dec_pci_bridge_initfn(PCIDevice *pci_dev)
+{
+    return pci_bridge_initfn(pci_dev, TYPE_PCI_BUS);
+}
+
 static void dec_21154_pci_bridge_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 
-    k->init = pci_bridge_initfn;
+    k->init = dec_pci_bridge_initfn;
     k->exit = pci_bridge_exitfn;
     k->vendor_id = PCI_VENDOR_ID_DEC;
     k->device_id = PCI_DEVICE_ID_DEC_21154;

hw/grackle_pci.c

@@ -88,7 +88,7 @@ PCIBus *pci_grackle_init(uint32_t base, qemu_irq *pic,
                                 pic,
                                 &d->pci_mmio,
                                 address_space_io,
-                                0, 4);
+                                0, 4, TYPE_PCI_BUS);
 
     pci_create_simple(phb->bus, 0, "grackle");
 

hw/gt64xxx.c

@@ -1107,7 +1107,7 @@ PCIBus *gt64120_register(qemu_irq *pic)
                                 pic,
                                 get_system_memory(),
                                 get_system_io(),
-                                PCI_DEVFN(18, 0), 4);
+                                PCI_DEVFN(18, 0), 4, TYPE_PCI_BUS);
     memory_region_init_io(&d->ISD_mem, &isd_mem_ops, d, "isd-mem", 0x1000);
 
     pci_create_simple(phb->bus, PCI_DEVFN(0, 0), "gt64120_pci");

hw/i82801b11.c

@@ -59,7 +59,7 @@ static int i82801b11_bridge_initfn(PCIDevice *d)
 {
     int rc;
 
-    rc = pci_bridge_initfn(d);
+    rc = pci_bridge_initfn(d, TYPE_PCI_BUS);
     if (rc < 0) {
         return rc;
     }

hw/ioh3420.c

@@ -97,7 +97,7 @@ static int ioh3420_initfn(PCIDevice *d)
     PCIESlot *s = DO_UPCAST(PCIESlot, port, p);
     int rc;
 
-    rc = pci_bridge_initfn(d);
+    rc = pci_bridge_initfn(d, TYPE_PCIE_BUS);
     if (rc < 0) {
         return rc;
     }

hw/pci/pci.c

@@ -75,6 +75,11 @@ static const TypeInfo pci_bus_info = {
     .class_init = pci_bus_class_init,
 };
 
+static const TypeInfo pcie_bus_info = {
+    .name = TYPE_PCIE_BUS,
+    .parent = TYPE_PCI_BUS,
+};
+
 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num);
 static void pci_update_mappings(PCIDevice *d);
 static void pci_set_irq(void *opaque, int irq_num, int level);
@@ -292,25 +297,35 @@ static void pci_bus_init(PCIBus *bus, DeviceState *parent,
     vmstate_register(NULL, -1, &vmstate_pcibus, bus);
 }
 
+bool pci_bus_is_express(PCIBus *bus)
+{
+    return object_dynamic_cast(OBJECT(bus), TYPE_PCIE_BUS);
+}
+
+bool pci_bus_is_root(PCIBus *bus)
+{
+    return !bus->parent_dev;
+}
+
 void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
                          const char *name,
                          MemoryRegion *address_space_mem,
                          MemoryRegion *address_space_io,
-                         uint8_t devfn_min)
+                         uint8_t devfn_min, const char *typename)
 {
-    qbus_create_inplace(bus, TYPE_PCI_BUS, parent, name);
+    qbus_create_inplace(bus, typename, parent, name);
     pci_bus_init(bus, parent, name, address_space_mem,
                  address_space_io, devfn_min);
 }
 
 PCIBus *pci_bus_new(DeviceState *parent, const char *name,
                     MemoryRegion *address_space_mem,
                     MemoryRegion *address_space_io,
-                    uint8_t devfn_min)
+                    uint8_t devfn_min, const char *typename)
 {
     PCIBus *bus;
 
-    bus = PCI_BUS(qbus_create(TYPE_PCI_BUS, parent, name));
+    bus = PCI_BUS(qbus_create(typename, parent, name));
     pci_bus_init(bus, parent, name, address_space_mem,
                  address_space_io, devfn_min);
     return bus;
@@ -338,19 +353,19 @@ PCIBus *pci_register_bus(DeviceState *parent, const char *name,
                          void *irq_opaque,
                          MemoryRegion *address_space_mem,
                          MemoryRegion *address_space_io,
-                         uint8_t devfn_min, int nirq)
+                         uint8_t devfn_min, int nirq, const char *typename)
 {
     PCIBus *bus;
 
     bus = pci_bus_new(parent, name, address_space_mem,
-                      address_space_io, devfn_min);
+                      address_space_io, devfn_min, typename);
     pci_bus_irqs(bus, set_irq, map_irq, irq_opaque, nirq);
     return bus;
 }
 
 int pci_bus_num(PCIBus *s)
 {
-    if (!s->parent_dev)
+    if (pci_bus_is_root(s))
         return 0;       /* pci host bridge */
     return s->parent_dev->config[PCI_SECONDARY_BUS];
 }
@@ -668,12 +683,10 @@ static void pci_init_mask_bridge(PCIDevice *d)
     pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_LIMIT,
                                PCI_PREF_RANGE_TYPE_64);
 
-/* TODO: add this define to pci_regs.h in linux and then in qemu. */
-#define  PCI_BRIDGE_CTL_VGA_16BIT	0x10	/* VGA 16-bit decode */
-#define  PCI_BRIDGE_CTL_DISCARD		0x100	/* Primary discard timer */
-#define  PCI_BRIDGE_CTL_SEC_DISCARD	0x200	/* Secondary discard timer */
-#define  PCI_BRIDGE_CTL_DISCARD_STATUS	0x400	/* Discard timer status */
-#define  PCI_BRIDGE_CTL_DISCARD_SERR	0x800	/* Discard timer SERR# enable */
+    /*
+     * TODO: Bridges default to 10-bit VGA decoding but we currently only
+     * implement 16-bit decoding (no alias support).
+     */
     pci_set_word(d->wmask + PCI_BRIDGE_CONTROL,
                  PCI_BRIDGE_CTL_PARITY |
                  PCI_BRIDGE_CTL_SERR |
@@ -875,6 +888,8 @@ static void pci_unregister_io_regions(PCIDevice *pci_dev)
             continue;
         memory_region_del_subregion(r->address_space, r->memory);
     }
+
+    pci_unregister_vga(pci_dev);
 }
 
 static int pci_unregister_device(DeviceState *dev)
@@ -937,6 +952,63 @@ void pci_register_bar(PCIDevice *pci_dev, int region_num,
         : pci_dev->bus->address_space_mem;
 }
 
+static void pci_update_vga(PCIDevice *pci_dev)
+{
+    uint16_t cmd;
+
+    if (!pci_dev->has_vga) {
+        return;
+    }
+
+    cmd = pci_get_word(pci_dev->config + PCI_COMMAND);
+
+    memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_MEM],
+                              cmd & PCI_COMMAND_MEMORY);
+    memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO],
+                              cmd & PCI_COMMAND_IO);
+    memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI],
+                              cmd & PCI_COMMAND_IO);
+}
+
+void pci_register_vga(PCIDevice *pci_dev, MemoryRegion *mem,
+                      MemoryRegion *io_lo, MemoryRegion *io_hi)
+{
+    assert(!pci_dev->has_vga);
+
+    assert(memory_region_size(mem) == QEMU_PCI_VGA_MEM_SIZE);
+    pci_dev->vga_regions[QEMU_PCI_VGA_MEM] = mem;
+    memory_region_add_subregion_overlap(pci_dev->bus->address_space_mem,
+                                        QEMU_PCI_VGA_MEM_BASE, mem, 1);
+
+    assert(memory_region_size(io_lo) == QEMU_PCI_VGA_IO_LO_SIZE);
+    pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO] = io_lo;
+    memory_region_add_subregion_overlap(pci_dev->bus->address_space_io,
+                                        QEMU_PCI_VGA_IO_LO_BASE, io_lo, 1);
+
+    assert(memory_region_size(io_hi) == QEMU_PCI_VGA_IO_HI_SIZE);
+    pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI] = io_hi;
+    memory_region_add_subregion_overlap(pci_dev->bus->address_space_io,
+                                        QEMU_PCI_VGA_IO_HI_BASE, io_hi, 1);
+    pci_dev->has_vga = true;
+
+    pci_update_vga(pci_dev);
+}
+
+void pci_unregister_vga(PCIDevice *pci_dev)
+{
+    if (!pci_dev->has_vga) {
+        return;
+    }
+
+    memory_region_del_subregion(pci_dev->bus->address_space_mem,
+                                pci_dev->vga_regions[QEMU_PCI_VGA_MEM]);
+    memory_region_del_subregion(pci_dev->bus->address_space_io,
+                                pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO]);
+    memory_region_del_subregion(pci_dev->bus->address_space_io,
+                                pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI]);
+    pci_dev->has_vga = false;
+}
+
 pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num)
 {
     return pci_dev->io_regions[region_num].addr;
@@ -1036,6 +1108,8 @@ static void pci_update_mappings(PCIDevice *d)
                                                 r->addr, r->memory, 1);
         }
     }
+
+    pci_update_vga(d);
 }
 
 static inline int pci_irq_disabled(PCIDevice *d)
@@ -1117,7 +1191,7 @@ static void pci_set_irq(void *opaque, int irq_num, int level)
 /* Special hooks used by device assignment */
 void pci_bus_set_route_irq_fn(PCIBus *bus, pci_route_irq_fn route_intx_to_irq)
 {
-    assert(!bus->parent_dev);
+    assert(pci_bus_is_root(bus));
     bus->route_intx_to_irq = route_intx_to_irq;
 }
 
@@ -1156,9 +1230,10 @@ void pci_bus_fire_intx_routing_notifier(PCIBus *bus)
         if (dev && dev->intx_routing_notifier) {
             dev->intx_routing_notifier(dev);
         }
-        QLIST_FOREACH(sec, &bus->child, sibling) {
-            pci_bus_fire_intx_routing_notifier(sec);
-        }
+    }
+
+    QLIST_FOREACH(sec, &bus->child, sibling) {
+        pci_bus_fire_intx_routing_notifier(sec);
     }
 }
 
@@ -1581,15 +1656,15 @@ static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num)
     }
 
     /* Consider all bus numbers in range for the host pci bridge. */
-    if (bus->parent_dev &&
+    if (!pci_bus_is_root(bus) &&
         !pci_secondary_bus_in_range(bus->parent_dev, bus_num)) {
         return NULL;
     }
 
     /* try child bus */
     for (; bus; bus = sec) {
         QLIST_FOREACH(sec, &bus->child, sibling) {
-            assert(sec->parent_dev);
+            assert(!pci_bus_is_root(sec));
             if (sec->parent_dev->config[PCI_SECONDARY_BUS] == bus_num) {
                 return sec;
             }
@@ -1852,7 +1927,12 @@ static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom)
     size = get_image_size(path);
     if (size < 0) {
         error_report("%s: failed to find romfile \"%s\"",
-                     __FUNCTION__, pdev->romfile);
+                     __func__, pdev->romfile);
+        g_free(path);
+        return -1;
+    } else if (size == 0) {
+        error_report("%s: ignoring empty romfile \"%s\"",
+                     __func__, pdev->romfile);
         g_free(path);
         return -1;
     }
@@ -2171,6 +2251,7 @@ static const TypeInfo pci_device_type_info = {
 static void pci_register_types(void)
 {
     type_register_static(&pci_bus_info);
+    type_register_static(&pcie_bus_info);
     type_register_static(&pci_device_type_info);
 }