diff mbox series

[v8,1/8] virtio: drop name parameter for virtio_init()

Message ID 1635334909-31614-2-git-send-email-jonah.palmer@oracle.com (mailing list archive)
State New, archived
Headers show
Series hmp,qmp: Add commands to introspect virtio devices | expand

Commit Message

Jonah Palmer Oct. 27, 2021, 11:41 a.m. UTC 
This patch drops the name parameter for the virtio_init function.

The pair between the numeric device ID and the string device ID
(name) of a virtio device already exists, but not in a way that
lets us map between them.

This patch will let us do this and removes the need for the name
parameter in virtio_init().

Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
---
 hw/9pfs/virtio-9p-device.c                  |  2 +-
 hw/block/vhost-user-blk.c                   |  2 +-
 hw/block/virtio-blk.c                       |  2 +-
 hw/char/virtio-serial-bus.c                 |  4 +--
 hw/display/virtio-gpu-base.c                |  2 +-
 hw/input/virtio-input.c                     |  3 +-
 hw/net/virtio-net.c                         |  2 +-
 hw/scsi/virtio-scsi.c                       |  3 +-
 hw/virtio/vhost-user-fs.c                   |  3 +-
 hw/virtio/vhost-user-i2c.c                  |  6 +---
 hw/virtio/vhost-user-rng.c                  |  2 +-
 hw/virtio/vhost-user-vsock.c                |  2 +-
 hw/virtio/vhost-vsock-common.c              |  4 +--
 hw/virtio/vhost-vsock.c                     |  2 +-
 hw/virtio/virtio-balloon.c                  |  3 +-
 hw/virtio/virtio-crypto.c                   |  2 +-
 hw/virtio/virtio-iommu.c                    |  3 +-
 hw/virtio/virtio-mem.c                      |  3 +-
 hw/virtio/virtio-pmem.c                     |  3 +-
 hw/virtio/virtio-rng.c                      |  2 +-
 hw/virtio/virtio.c                          | 45 +++++++++++++++++++++++++++--
 include/hw/virtio/vhost-vsock-common.h      |  2 +-
 include/hw/virtio/virtio-gpu.h              |  3 +-
 include/hw/virtio/virtio.h                  |  3 +-
 include/standard-headers/linux/virtio_ids.h |  1 +
 25 files changed, 68 insertions(+), 41 deletions(-)
diff mbox series

Patch

diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
index 54ee93b..5f522e6 100644
--- a/hw/9pfs/virtio-9p-device.c
+++ b/hw/9pfs/virtio-9p-device.c
@@ -216,7 +216,7 @@  static void virtio_9p_device_realize(DeviceState *dev, Error **errp)
     }
 
     v->config_size = sizeof(struct virtio_9p_config) + strlen(s->fsconf.tag);
-    virtio_init(vdev, "virtio-9p", VIRTIO_ID_9P, v->config_size);
+    virtio_init(vdev, VIRTIO_ID_9P, v->config_size);
     v->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output);
 }
 
diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c
index ba13cb8..f61f8c1 100644
--- a/hw/block/vhost-user-blk.c
+++ b/hw/block/vhost-user-blk.c
@@ -490,7 +490,7 @@  static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    virtio_init(vdev, "virtio-blk", VIRTIO_ID_BLOCK,
+    virtio_init(vdev, VIRTIO_ID_BLOCK,
                 sizeof(struct virtio_blk_config));
 
     s->virtqs = g_new(VirtQueue *, s->num_queues);
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index f139cd7..505e574 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -1213,7 +1213,7 @@  static void virtio_blk_device_realize(DeviceState *dev, Error **errp)
 
     virtio_blk_set_config_size(s, s->host_features);
 
-    virtio_init(vdev, "virtio-blk", VIRTIO_ID_BLOCK, s->config_size);
+    virtio_init(vdev, VIRTIO_ID_BLOCK, s->config_size);
 
     s->blk = conf->conf.blk;
     s->rq = NULL;
diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c
index f01ec21..232f4c9 100644
--- a/hw/char/virtio-serial-bus.c
+++ b/hw/char/virtio-serial-bus.c
@@ -1044,8 +1044,8 @@  static void virtio_serial_device_realize(DeviceState *dev, Error **errp)
                             VIRTIO_CONSOLE_F_EMERG_WRITE)) {
         config_size = offsetof(struct virtio_console_config, emerg_wr);
     }
-    virtio_init(vdev, "virtio-serial", VIRTIO_ID_CONSOLE,
-                config_size);
+
+    virtio_init(vdev, VIRTIO_ID_CONSOLE, config_size);
 
     /* Spawn a new virtio-serial bus on which the ports will ride as devices */
     qbus_init(&vser->bus, sizeof(vser->bus), TYPE_VIRTIO_SERIAL_BUS,
diff --git a/hw/display/virtio-gpu-base.c b/hw/display/virtio-gpu-base.c
index c8da480..5411a7b 100644
--- a/hw/display/virtio-gpu-base.c
+++ b/hw/display/virtio-gpu-base.c
@@ -170,7 +170,7 @@  virtio_gpu_base_device_realize(DeviceState *qdev,
     }
 
     g->virtio_config.num_scanouts = cpu_to_le32(g->conf.max_outputs);
-    virtio_init(VIRTIO_DEVICE(g), "virtio-gpu", VIRTIO_ID_GPU,
+    virtio_init(VIRTIO_DEVICE(g), VIRTIO_ID_GPU,
                 sizeof(struct virtio_gpu_config));
 
     if (virtio_gpu_virgl_enabled(g->conf)) {
diff --git a/hw/input/virtio-input.c b/hw/input/virtio-input.c
index 54bcb46..5b5398b 100644
--- a/hw/input/virtio-input.c
+++ b/hw/input/virtio-input.c
@@ -257,8 +257,7 @@  static void virtio_input_device_realize(DeviceState *dev, Error **errp)
     vinput->cfg_size += 8;
     assert(vinput->cfg_size <= sizeof(virtio_input_config));
 
-    virtio_init(vdev, "virtio-input", VIRTIO_ID_INPUT,
-                vinput->cfg_size);
+    virtio_init(vdev, VIRTIO_ID_INPUT, vinput->cfg_size);
     vinput->evt = virtio_add_queue(vdev, 64, virtio_input_handle_evt);
     vinput->sts = virtio_add_queue(vdev, 64, virtio_input_handle_sts);
 }
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index f2014d5..b275acf 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -3383,7 +3383,7 @@  static void virtio_net_device_realize(DeviceState *dev, Error **errp)
     }
 
     virtio_net_set_config_size(n, n->host_features);
-    virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size);
+    virtio_init(vdev, VIRTIO_ID_NET, n->config_size);
 
     /*
      * We set a lower limit on RX queue size to what it always was.
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 51fd095..ce71939 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -972,8 +972,7 @@  void virtio_scsi_common_realize(DeviceState *dev,
     VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(dev);
     int i;
 
-    virtio_init(vdev, "virtio-scsi", VIRTIO_ID_SCSI,
-                sizeof(VirtIOSCSIConfig));
+    virtio_init(vdev, VIRTIO_ID_SCSI, sizeof(VirtIOSCSIConfig));
 
     if (s->conf.num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) {
         s->conf.num_queues = 1;
diff --git a/hw/virtio/vhost-user-fs.c b/hw/virtio/vhost-user-fs.c
index c595957..b875640 100644
--- a/hw/virtio/vhost-user-fs.c
+++ b/hw/virtio/vhost-user-fs.c
@@ -219,8 +219,7 @@  static void vuf_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    virtio_init(vdev, "vhost-user-fs", VIRTIO_ID_FS,
-                sizeof(struct virtio_fs_config));
+    virtio_init(vdev, VIRTIO_ID_FS, sizeof(struct virtio_fs_config));
 
     /* Hiprio queue */
     fs->hiprio_vq = virtio_add_queue(vdev, fs->conf.queue_size, vuf_handle_output);
diff --git a/hw/virtio/vhost-user-i2c.c b/hw/virtio/vhost-user-i2c.c
index d172632..efc6fc0 100644
--- a/hw/virtio/vhost-user-i2c.c
+++ b/hw/virtio/vhost-user-i2c.c
@@ -14,10 +14,6 @@ 
 #include "qemu/error-report.h"
 #include "standard-headers/linux/virtio_ids.h"
 
-/* Remove this once the header is updated in Linux kernel */
-#ifndef VIRTIO_ID_I2C_ADAPTER
-#define VIRTIO_ID_I2C_ADAPTER                34
-#endif
 
 static void vu_i2c_start(VirtIODevice *vdev)
 {
@@ -220,7 +216,7 @@  static void vu_i2c_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    virtio_init(vdev, "vhost-user-i2c", VIRTIO_ID_I2C_ADAPTER, 0);
+    virtio_init(vdev, VIRTIO_ID_I2C_ADAPTER, 0);
 
     i2c->vhost_dev.nvqs = 1;
     i2c->vq = virtio_add_queue(vdev, 4, vu_i2c_handle_output);
diff --git a/hw/virtio/vhost-user-rng.c b/hw/virtio/vhost-user-rng.c
index 209ee5b..08bccba 100644
--- a/hw/virtio/vhost-user-rng.c
+++ b/hw/virtio/vhost-user-rng.c
@@ -203,7 +203,7 @@  static void vu_rng_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    virtio_init(vdev, "vhost-user-rng", VIRTIO_ID_RNG, 0);
+    virtio_init(vdev, VIRTIO_ID_RNG, 0);
 
     rng->req_vq = virtio_add_queue(vdev, 4, vu_rng_handle_output);
     if (!rng->req_vq) {
diff --git a/hw/virtio/vhost-user-vsock.c b/hw/virtio/vhost-user-vsock.c
index 52bd682..0f8ff99 100644
--- a/hw/virtio/vhost-user-vsock.c
+++ b/hw/virtio/vhost-user-vsock.c
@@ -107,7 +107,7 @@  static void vuv_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    vhost_vsock_common_realize(vdev, "vhost-user-vsock");
+    vhost_vsock_common_realize(vdev);
 
     vhost_dev_set_config_notifier(&vvc->vhost_dev, &vsock_ops);
 
diff --git a/hw/virtio/vhost-vsock-common.c b/hw/virtio/vhost-vsock-common.c
index 3f37712..e8f6249 100644
--- a/hw/virtio/vhost-vsock-common.c
+++ b/hw/virtio/vhost-vsock-common.c
@@ -220,11 +220,11 @@  int vhost_vsock_common_post_load(void *opaque, int version_id)
     return 0;
 }
 
-void vhost_vsock_common_realize(VirtIODevice *vdev, const char *name)
+void vhost_vsock_common_realize(VirtIODevice *vdev)
 {
     VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(vdev);
 
-    virtio_init(vdev, name, VIRTIO_ID_VSOCK,
+    virtio_init(vdev, VIRTIO_ID_VSOCK,
                 sizeof(struct virtio_vsock_config));
 
     /* Receive and transmit queues belong to vhost */
diff --git a/hw/virtio/vhost-vsock.c b/hw/virtio/vhost-vsock.c
index 478c0c9..3d4ede9 100644
--- a/hw/virtio/vhost-vsock.c
+++ b/hw/virtio/vhost-vsock.c
@@ -166,7 +166,7 @@  static void vhost_vsock_device_realize(DeviceState *dev, Error **errp)
         qemu_set_nonblock(vhostfd);
     }
 
-    vhost_vsock_common_realize(vdev, "vhost-vsock");
+    vhost_vsock_common_realize(vdev);
 
     ret = vhost_dev_init(&vvc->vhost_dev, (void *)(uintptr_t)vhostfd,
                          VHOST_BACKEND_TYPE_KERNEL, 0, errp);
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index c6962fc..641a394 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -885,8 +885,7 @@  static void virtio_balloon_device_realize(DeviceState *dev, Error **errp)
     VirtIOBalloon *s = VIRTIO_BALLOON(dev);
     int ret;
 
-    virtio_init(vdev, "virtio-balloon", VIRTIO_ID_BALLOON,
-                virtio_balloon_config_size(s));
+    virtio_init(vdev, VIRTIO_ID_BALLOON, virtio_balloon_config_size(s));
 
     ret = qemu_add_balloon_handler(virtio_balloon_to_target,
                                    virtio_balloon_stat, s);
diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c
index 54f9bbb..cca5237 100644
--- a/hw/virtio/virtio-crypto.c
+++ b/hw/virtio/virtio-crypto.c
@@ -810,7 +810,7 @@  static void virtio_crypto_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    virtio_init(vdev, "virtio-crypto", VIRTIO_ID_CRYPTO, vcrypto->config_size);
+    virtio_init(vdev, VIRTIO_ID_CRYPTO, vcrypto->config_size);
     vcrypto->curr_queues = 1;
     vcrypto->vqs = g_malloc0(sizeof(VirtIOCryptoQueue) * vcrypto->max_queues);
     for (i = 0; i < vcrypto->max_queues; i++) {
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 1b23e8e..92c5eb7 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -973,8 +973,7 @@  static void virtio_iommu_device_realize(DeviceState *dev, Error **errp)
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
     VirtIOIOMMU *s = VIRTIO_IOMMU(dev);
 
-    virtio_init(vdev, "virtio-iommu", VIRTIO_ID_IOMMU,
-                sizeof(struct virtio_iommu_config));
+    virtio_init(vdev, VIRTIO_ID_IOMMU, sizeof(struct virtio_iommu_config));
 
     memset(s->iommu_pcibus_by_bus_num, 0, sizeof(s->iommu_pcibus_by_bus_num));
 
diff --git a/hw/virtio/virtio-mem.c b/hw/virtio/virtio-mem.c
index df91e45..dbef06c 100644
--- a/hw/virtio/virtio-mem.c
+++ b/hw/virtio/virtio-mem.c
@@ -737,8 +737,7 @@  static void virtio_mem_device_realize(DeviceState *dev, Error **errp)
                         vmem->block_size;
     vmem->bitmap = bitmap_new(vmem->bitmap_size);
 
-    virtio_init(vdev, TYPE_VIRTIO_MEM, VIRTIO_ID_MEM,
-                sizeof(struct virtio_mem_config));
+    virtio_init(vdev, VIRTIO_ID_MEM, sizeof(struct virtio_mem_config));
     vmem->vq = virtio_add_queue(vdev, 128, virtio_mem_handle_request);
 
     host_memory_backend_set_mapped(vmem->memdev, true);
diff --git a/hw/virtio/virtio-pmem.c b/hw/virtio/virtio-pmem.c
index d1aeb90..8cbbd78 100644
--- a/hw/virtio/virtio-pmem.c
+++ b/hw/virtio/virtio-pmem.c
@@ -123,8 +123,7 @@  static void virtio_pmem_realize(DeviceState *dev, Error **errp)
     }
 
     host_memory_backend_set_mapped(pmem->memdev, true);
-    virtio_init(vdev, TYPE_VIRTIO_PMEM, VIRTIO_ID_PMEM,
-                sizeof(struct virtio_pmem_config));
+    virtio_init(vdev, VIRTIO_ID_PMEM, sizeof(struct virtio_pmem_config));
     pmem->rq_vq = virtio_add_queue(vdev, 128, virtio_pmem_flush);
 }
 
diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c
index cc8e9f7..7e12fc0 100644
--- a/hw/virtio/virtio-rng.c
+++ b/hw/virtio/virtio-rng.c
@@ -215,7 +215,7 @@  static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    virtio_init(vdev, "virtio-rng", VIRTIO_ID_RNG, 0);
+    virtio_init(vdev, VIRTIO_ID_RNG, 0);
 
     vrng->vq = virtio_add_queue(vdev, 8, handle_input);
     vrng->quota_remaining = vrng->conf.max_bytes;
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index cc69a9b..be98b4d 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -133,6 +133,45 @@  struct VirtQueue
     QLIST_ENTRY(VirtQueue) node;
 };
 
+const char *virtio_device_names[] = {
+    [VIRTIO_ID_NET] = "virtio-net",
+    [VIRTIO_ID_BLOCK] = "virtio-blk",
+    [VIRTIO_ID_CONSOLE] = "virtio-serial",
+    [VIRTIO_ID_RNG] = "virtio-rng",
+    [VIRTIO_ID_BALLOON] = "virtio-balloon",
+    [VIRTIO_ID_IOMEM] = "virtio-iomem",
+    [VIRTIO_ID_RPMSG] = "virtio-rpmsg",
+    [VIRTIO_ID_SCSI] = "virtio-scsi",
+    [VIRTIO_ID_9P] = "virtio-9p",
+    [VIRTIO_ID_MAC80211_WLAN] = "virtio-mac-wlan",
+    [VIRTIO_ID_RPROC_SERIAL] = "virtio-rproc-serial",
+    [VIRTIO_ID_CAIF] = "virtio-caif",
+    [VIRTIO_ID_MEMORY_BALLOON] = "virtio-mem-balloon",
+    [VIRTIO_ID_GPU] = "virtio-gpu",
+    [VIRTIO_ID_CLOCK] = "virtio-clk",
+    [VIRTIO_ID_INPUT] = "virtio-input",
+    [VIRTIO_ID_VSOCK] = "vhost-vsock",
+    [VIRTIO_ID_CRYPTO] = "virtio-crypto",
+    [VIRTIO_ID_SIGNAL_DIST] = "virtio-signal",
+    [VIRTIO_ID_PSTORE] = "virtio-pstore",
+    [VIRTIO_ID_IOMMU] = "virtio-iommu",
+    [VIRTIO_ID_MEM] = "virtio-mem",
+    [VIRTIO_ID_SOUND] = "virtio-sound",
+    [VIRTIO_ID_FS] = "vhost-user-fs",
+    [VIRTIO_ID_PMEM] = "virtio-pmem",
+    [VIRTIO_ID_MAC80211_HWSIM] = "virtio-mac-hwsim",
+    [VIRTIO_ID_I2C_ADAPTER] = "vhost-user-i2c",
+    [VIRTIO_ID_BT] = "virtio-bluetooth"
+};
+
+static const char *virtio_id_to_name(uint16_t device_id)
+{
+    assert(device_id < G_N_ELEMENTS(virtio_device_names));
+    const char *name = virtio_device_names[device_id];
+    assert(name != NULL);
+    return name;
+}
+
 /* Called within call_rcu().  */
 static void virtio_free_region_cache(VRingMemoryRegionCaches *caches)
 {
@@ -3235,8 +3274,8 @@  void virtio_instance_init_common(Object *proxy_obj, void *data,
     qdev_alias_all_properties(vdev, proxy_obj);
 }
 
-void virtio_init(VirtIODevice *vdev, const char *name,
-                 uint16_t device_id, size_t config_size)
+void virtio_init(VirtIODevice *vdev, uint16_t device_id,
+                 size_t config_size)
 {
     BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
     VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
@@ -3265,7 +3304,7 @@  void virtio_init(VirtIODevice *vdev, const char *name,
         vdev->vq[i].host_notifier_enabled = false;
     }
 
-    vdev->name = name;
+    vdev->name = virtio_id_to_name(device_id);
     vdev->config_len = config_size;
     if (vdev->config_len) {
         vdev->config = g_malloc0(config_size);
diff --git a/include/hw/virtio/vhost-vsock-common.h b/include/hw/virtio/vhost-vsock-common.h
index d8b565b..076b7ab 100644
--- a/include/hw/virtio/vhost-vsock-common.h
+++ b/include/hw/virtio/vhost-vsock-common.h
@@ -44,7 +44,7 @@  int vhost_vsock_common_start(VirtIODevice *vdev);
 void vhost_vsock_common_stop(VirtIODevice *vdev);
 int vhost_vsock_common_pre_save(void *opaque);
 int vhost_vsock_common_post_load(void *opaque, int version_id);
-void vhost_vsock_common_realize(VirtIODevice *vdev, const char *name);
+void vhost_vsock_common_realize(VirtIODevice *vdev);
 void vhost_vsock_common_unrealize(VirtIODevice *vdev);
 uint64_t vhost_vsock_common_get_features(VirtIODevice *vdev, uint64_t features,
                                          Error **errp);
diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
index 24c6628..96e7702 100644
--- a/include/hw/virtio/virtio-gpu.h
+++ b/include/hw/virtio/virtio-gpu.h
@@ -22,6 +22,7 @@ 
 #include "sysemu/vhost-user-backend.h"
 
 #include "standard-headers/linux/virtio_gpu.h"
+#include "standard-headers/linux/virtio_ids.h"
 #include "qom/object.h"
 
 #define TYPE_VIRTIO_GPU_BASE "virtio-gpu-base"
@@ -37,8 +38,6 @@  OBJECT_DECLARE_SIMPLE_TYPE(VirtIOGPUGL, VIRTIO_GPU_GL)
 #define TYPE_VHOST_USER_GPU "vhost-user-gpu"
 OBJECT_DECLARE_SIMPLE_TYPE(VhostUserGPU, VHOST_USER_GPU)
 
-#define VIRTIO_ID_GPU 16
-
 struct virtio_gpu_simple_resource {
     uint32_t resource_id;
     uint32_t width;
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index 8bab9cf..bfc73ec 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -165,8 +165,7 @@  struct VirtioDeviceClass {
 void virtio_instance_init_common(Object *proxy_obj, void *data,
                                  size_t vdev_size, const char *vdev_name);
 
-void virtio_init(VirtIODevice *vdev, const char *name,
-                         uint16_t device_id, size_t config_size);
+void virtio_init(VirtIODevice *vdev, uint16_t device_id, size_t config_size);
 void virtio_cleanup(VirtIODevice *vdev);
 
 void virtio_error(VirtIODevice *vdev, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
diff --git a/include/standard-headers/linux/virtio_ids.h b/include/standard-headers/linux/virtio_ids.h
index 4fe842c..3957d11 100644
--- a/include/standard-headers/linux/virtio_ids.h
+++ b/include/standard-headers/linux/virtio_ids.h
@@ -55,6 +55,7 @@ 
 #define VIRTIO_ID_FS			26 /* virtio filesystem */
 #define VIRTIO_ID_PMEM			27 /* virtio pmem */
 #define VIRTIO_ID_MAC80211_HWSIM	29 /* virtio mac80211-hwsim */
+#define VIRTIO_ID_I2C_ADAPTER           34 /* virtio I2C adapater */
 #define VIRTIO_ID_BT			40 /* virtio bluetooth */
 
 #endif /* _LINUX_VIRTIO_IDS_H */