hw/misc/ivshmem: Remove deprecated "ivshmem" legacy device

It's been marked as deprecated in QEMU v2.6.0 already, so really nobody
should use the legacy "ivshmem" device anymore (but use ivshmem-plain or
ivshmem-doorbell instead). Time to remove the deprecated device now.

Belatedly also update a mention of the deprecated "ivshmem" in the file
docs/specs/ivshmem-spec.txt to "ivshmem-doorbell". Missed in commit
5400c02b90b ("ivshmem: Split ivshmem-plain, ivshmem-doorbell off ivshmem").

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

2 files changed, 5 insertions, 206 deletions

diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 5088e2f..63c84e3 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -715,7 +715,6 @@ static void pc_i440fx_1_2_machine_options(MachineClass *m)
         PC_CPU_MODEL_IDS("1.2.0")
         { "nec-usb-xhci", "msi", "off" },
         { "nec-usb-xhci", "msix", "off" },
-        { "ivshmem", "use64", "0" },
         { "qxl", "revision", "3" },
         { "qxl-vga", "revision", "3" },
         { "VGA", "mmio", "off" },
diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c
index 8213659..c7b6bbc 100644
--- a/hw/misc/ivshmem.c
+++ b/hw/misc/ivshmem.c
@@ -112,13 +112,6 @@ typedef struct IVShmemState {
     /* migration stuff */
     OnOffAuto master;
     Error *migration_blocker;
-
-    /* legacy cruft */
-    char *role;
-    char *shmobj;
-    char *sizearg;
-    size_t legacy_size;
-    uint32_t not_legacy_32bit;
 } IVShmemState;
 
 /* registers for the Inter-VM shared memory device */
@@ -529,17 +522,6 @@ static void process_msg_shmem(IVShmemState *s, int fd, Error **errp)
 
     size = buf.st_size;
 
-    /* Legacy cruft */
-    if (s->legacy_size != SIZE_MAX) {
-        if (size < s->legacy_size) {
-            error_setg(errp, "server sent only %zd bytes of shared memory",
-                       (size_t)buf.st_size);
-            close(fd);
-            return;
-        }
-        size = s->legacy_size;
-    }
-
     /* mmap the region and map into the BAR2 */
     memory_region_init_ram_from_fd(&s->server_bar2, OBJECT(s),
                                    "ivshmem.bar2", size, true, fd, &local_err);
@@ -882,8 +864,6 @@ static void ivshmem_common_realize(PCIDevice *dev, Error **errp)
     IVShmemState *s = IVSHMEM_COMMON(dev);
     Error *err = NULL;
     uint8_t *pci_conf;
-    uint8_t attr = PCI_BASE_ADDRESS_SPACE_MEMORY |
-        PCI_BASE_ADDRESS_MEM_PREFETCH;
     Error *local_err = NULL;
 
     /* IRQFD requires MSI */
@@ -903,10 +883,6 @@ static void ivshmem_common_realize(PCIDevice *dev, Error **errp)
     pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY,
                      &s->ivshmem_mmio);
 
-    if (s->not_legacy_32bit) {
-        attr |= PCI_BASE_ADDRESS_MEM_TYPE_64;
-    }
-
     if (s->hostmem != NULL) {
         IVSHMEM_DPRINTF("using hostmem\n");
 
@@ -964,7 +940,11 @@ static void ivshmem_common_realize(PCIDevice *dev, Error **errp)
     }
 
     vmstate_register_ram(s->ivshmem_bar2, DEVICE(s));
-    pci_register_bar(PCI_DEVICE(s), 2, attr, s->ivshmem_bar2);
+    pci_register_bar(PCI_DEVICE(s), 2,
+                     PCI_BASE_ADDRESS_SPACE_MEMORY |
+                     PCI_BASE_ADDRESS_MEM_PREFETCH |
+                     PCI_BASE_ADDRESS_MEM_TYPE_64,
+                     s->ivshmem_bar2);
 }
 
 static void ivshmem_exit(PCIDevice *dev)
@@ -1084,13 +1064,6 @@ static Property ivshmem_plain_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
-static void ivshmem_plain_init(Object *obj)
-{
-    IVShmemState *s = IVSHMEM_PLAIN(obj);
-
-    s->not_legacy_32bit = 1;
-}
-
 static void ivshmem_plain_realize(PCIDevice *dev, Error **errp)
 {
     IVShmemState *s = IVSHMEM_COMMON(dev);
@@ -1122,7 +1095,6 @@ static const TypeInfo ivshmem_plain_info = {
     .name          = TYPE_IVSHMEM_PLAIN,
     .parent        = TYPE_IVSHMEM_COMMON,
     .instance_size = sizeof(IVShmemState),
-    .instance_init = ivshmem_plain_init,
     .class_init    = ivshmem_plain_class_init,
 };
 
@@ -1155,8 +1127,6 @@ static void ivshmem_doorbell_init(Object *obj)
     IVShmemState *s = IVSHMEM_DOORBELL(obj);
 
     s->features |= (1 << IVSHMEM_MSI);
-    s->legacy_size = SIZE_MAX;  /* whatever the server sends */
-    s->not_legacy_32bit = 1;
 }
 
 static void ivshmem_doorbell_realize(PCIDevice *dev, Error **errp)
@@ -1189,181 +1159,11 @@ static const TypeInfo ivshmem_doorbell_info = {
     .class_init    = ivshmem_doorbell_class_init,
 };
 
-static int ivshmem_load_old(QEMUFile *f, void *opaque, int version_id)
-{
-    IVShmemState *s = opaque;
-    PCIDevice *pdev = PCI_DEVICE(s);
-    int ret;
-
-    IVSHMEM_DPRINTF("ivshmem_load_old\n");
-
-    if (version_id != 0) {
-        return -EINVAL;
-    }
-
-    ret = ivshmem_pre_load(s);
-    if (ret) {
-        return ret;
-    }
-
-    ret = pci_device_load(pdev, f);
-    if (ret) {
-        return ret;
-    }
-
-    if (ivshmem_has_feature(s, IVSHMEM_MSI)) {
-        msix_load(pdev, f);
-        ivshmem_msix_vector_use(s);
-    } else {
-        s->intrstatus = qemu_get_be32(f);
-        s->intrmask = qemu_get_be32(f);
-    }
-
-    return 0;
-}
-
-static bool test_msix(void *opaque, int version_id)
-{
-    IVShmemState *s = opaque;
-
-    return ivshmem_has_feature(s, IVSHMEM_MSI);
-}
-
-static bool test_no_msix(void *opaque, int version_id)
-{
-    return !test_msix(opaque, version_id);
-}
-
-static const VMStateDescription ivshmem_vmsd = {
-    .name = "ivshmem",
-    .version_id = 1,
-    .minimum_version_id = 1,
-    .pre_load = ivshmem_pre_load,
-    .post_load = ivshmem_post_load,
-    .fields = (VMStateField[]) {
-        VMSTATE_PCI_DEVICE(parent_obj, IVShmemState),
-
-        VMSTATE_MSIX_TEST(parent_obj, IVShmemState, test_msix),
-        VMSTATE_UINT32_TEST(intrstatus, IVShmemState, test_no_msix),
-        VMSTATE_UINT32_TEST(intrmask, IVShmemState, test_no_msix),
-
-        VMSTATE_END_OF_LIST()
-    },
-    .load_state_old = ivshmem_load_old,
-    .minimum_version_id_old = 0
-};
-
-static Property ivshmem_properties[] = {
-    DEFINE_PROP_CHR("chardev", IVShmemState, server_chr),
-    DEFINE_PROP_STRING("size", IVShmemState, sizearg),
-    DEFINE_PROP_UINT32("vectors", IVShmemState, vectors, 1),
-    DEFINE_PROP_BIT("ioeventfd", IVShmemState, features, IVSHMEM_IOEVENTFD,
-                    false),
-    DEFINE_PROP_BIT("msi", IVShmemState, features, IVSHMEM_MSI, true),
-    DEFINE_PROP_STRING("shm", IVShmemState, shmobj),
-    DEFINE_PROP_STRING("role", IVShmemState, role),
-    DEFINE_PROP_UINT32("use64", IVShmemState, not_legacy_32bit, 1),
-    DEFINE_PROP_END_OF_LIST(),
-};
-
-static void desugar_shm(IVShmemState *s)
-{
-    Object *obj;
-    char *path;
-
-    obj = object_new("memory-backend-file");
-    path = g_strdup_printf("/dev/shm/%s", s->shmobj);
-    object_property_set_str(obj, path, "mem-path", &error_abort);
-    g_free(path);
-    object_property_set_int(obj, s->legacy_size, "size", &error_abort);
-    object_property_set_bool(obj, true, "share", &error_abort);
-    object_property_add_child(OBJECT(s), "internal-shm-backend", obj,
-                              &error_abort);
-    object_unref(obj);
-    user_creatable_complete(USER_CREATABLE(obj), &error_abort);
-    s->hostmem = MEMORY_BACKEND(obj);
-}
-
-static void ivshmem_realize(PCIDevice *dev, Error **errp)
-{
-    IVShmemState *s = IVSHMEM_COMMON(dev);
-
-    if (!qtest_enabled()) {
-        warn_report("ivshmem is deprecated, please use ivshmem-plain"
-                    " or ivshmem-doorbell instead");
-    }
-
-    if (qemu_chr_fe_backend_connected(&s->server_chr) + !!s->shmobj != 1) {
-        error_setg(errp, "You must specify either 'shm' or 'chardev'");
-        return;
-    }
-
-    if (s->sizearg == NULL) {
-        s->legacy_size = 4 * MiB; /* 4 MB default */
-    } else {
-        int ret;
-        uint64_t size;
-
-        ret = qemu_strtosz_MiB(s->sizearg, NULL, &size);
-        if (ret < 0 || (size_t)size != size || !is_power_of_2(size)) {
-            error_setg(errp, "Invalid size %s", s->sizearg);
-            return;
-        }
-        s->legacy_size = size;
-    }
-
-    /* check that role is reasonable */
-    if (s->role) {
-        if (strncmp(s->role, "peer", 5) == 0) {
-            s->master = ON_OFF_AUTO_OFF;
-        } else if (strncmp(s->role, "master", 7) == 0) {
-            s->master = ON_OFF_AUTO_ON;
-        } else {
-            error_setg(errp, "'role' must be 'peer' or 'master'");
-            return;
-        }
-    } else {
-        s->master = ON_OFF_AUTO_AUTO;
-    }
-
-    if (s->shmobj) {
-        desugar_shm(s);
-    }
-
-    /*
-     * Note: we don't use INTx with IVSHMEM_MSI at all, so this is a
-     * bald-faced lie then.  But it's a backwards compatible lie.
-     */
-    pci_config_set_interrupt_pin(dev->config, 1);
-
-    ivshmem_common_realize(dev, errp);
-}
-
-static void ivshmem_class_init(ObjectClass *klass, void *data)
-{
-    DeviceClass *dc = DEVICE_CLASS(klass);
-    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
-
-    k->realize = ivshmem_realize;
-    k->revision = 0;
-    dc->desc = "Inter-VM shared memory (legacy)";
-    dc->props = ivshmem_properties;
-    dc->vmsd = &ivshmem_vmsd;
-}
-
-static const TypeInfo ivshmem_info = {
-    .name          = TYPE_IVSHMEM,
-    .parent        = TYPE_IVSHMEM_COMMON,
-    .instance_size = sizeof(IVShmemState),
-    .class_init    = ivshmem_class_init,
-};
-
 static void ivshmem_register_types(void)
 {
     type_register_static(&ivshmem_common_info);
     type_register_static(&ivshmem_plain_info);
     type_register_static(&ivshmem_doorbell_info);
-    type_register_static(&ivshmem_info);
 }
 
 type_init(ivshmem_register_types)