qmp: update virtio feature maps, vhost-user-gpio introspection

Add new vhost-user protocol feature to vhost-user protocol feature map
and enumeration:
 - VHOST_USER_PROTOCOL_F_STATUS

Add new virtio device features for several virtio devices to their
respective feature mappings:

virtio-blk:
 - VIRTIO_BLK_F_SECURE_ERASE

virtio-net:
 - VIRTIO_NET_F_NOTF_COAL
 - VIRTIO_NET_F_GUEST_USO4
 - VIRTIO_NET_F_GUEST_USO6
 - VIRTIO_NET_F_HOST_USO

virtio/vhost-user-gpio:
 - VIRTIO_GPIO_F_IRQ
 - VHOST_USER_F_PROTOCOL_FEATURES

Add support for introspection on vhost-user-gpio devices.

Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Reviewed-by: Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>
Message-Id: <20230926224107.2951144-3-jonah.palmer@oracle.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/virtio/vhost-user-gpio.c

@@ -205,6 +205,12 @@ static void vu_gpio_guest_notifier_mask(VirtIODevice *vdev, int idx, bool mask)
     vhost_virtqueue_mask(&gpio->vhost_dev, vdev, idx, mask);
 }
 
+static struct vhost_dev *vu_gpio_get_vhost(VirtIODevice *vdev)
+{
+    VHostUserGPIO *gpio = VHOST_USER_GPIO(vdev);
+    return &gpio->vhost_dev;
+}
+
 static void do_vhost_user_cleanup(VirtIODevice *vdev, VHostUserGPIO *gpio)
 {
     virtio_delete_queue(gpio->command_vq);
@@ -413,6 +419,7 @@ static void vu_gpio_class_init(ObjectClass *klass, void *data)
     vdc->get_config = vu_gpio_get_config;
     vdc->set_status = vu_gpio_set_status;
     vdc->guest_notifier_mask = vu_gpio_guest_notifier_mask;
+    vdc->get_vhost = vu_gpio_get_vhost;
 }
 
 static const TypeInfo vu_gpio_info = {

hw/virtio/virtio-qmp.c

@@ -30,6 +30,7 @@
 #include "standard-headers/linux/virtio_iommu.h"
 #include "standard-headers/linux/virtio_mem.h"
 #include "standard-headers/linux/virtio_vsock.h"
+#include "standard-headers/linux/virtio_gpio.h"
 
 #include CONFIG_DEVICES
 
@@ -53,6 +54,7 @@ enum VhostUserProtocolFeature {
     VHOST_USER_PROTOCOL_F_RESET_DEVICE = 13,
     VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS = 14,
     VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS = 15,
+    VHOST_USER_PROTOCOL_F_STATUS = 16,
     VHOST_USER_PROTOCOL_F_MAX
 };
 
@@ -136,6 +138,9 @@ static const qmp_virtio_feature_map_t vhost_user_protocol_map[] = {
     FEATURE_ENTRY(VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS, \
             "VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS: Configuration for "
             "memory slots supported"),
+    FEATURE_ENTRY(VHOST_USER_PROTOCOL_F_STATUS, \
+            "VHOST_USER_PROTOCOL_F_STATUS: Querying and notifying back-end "
+            "device status supported"),
     { -1, "" }
 };
 
@@ -178,6 +183,8 @@ static const qmp_virtio_feature_map_t virtio_blk_feature_map[] = {
             "VIRTIO_BLK_F_DISCARD: Discard command supported"),
     FEATURE_ENTRY(VIRTIO_BLK_F_WRITE_ZEROES, \
             "VIRTIO_BLK_F_WRITE_ZEROES: Write zeroes command supported"),
+    FEATURE_ENTRY(VIRTIO_BLK_F_SECURE_ERASE, \
+            "VIRTIO_BLK_F_SECURE_ERASE: Secure erase supported"),
     FEATURE_ENTRY(VIRTIO_BLK_F_ZONED, \
             "VIRTIO_BLK_F_ZONED: Zoned block devices"),
 #ifndef VIRTIO_BLK_NO_LEGACY
@@ -301,6 +308,14 @@ static const qmp_virtio_feature_map_t virtio_net_feature_map[] = {
     FEATURE_ENTRY(VIRTIO_NET_F_CTRL_MAC_ADDR, \
             "VIRTIO_NET_F_CTRL_MAC_ADDR: MAC address set through control "
             "channel"),
+    FEATURE_ENTRY(VIRTIO_NET_F_NOTF_COAL, \
+            "VIRTIO_NET_F_NOTF_COAL: Device supports coalescing notifications"),
+    FEATURE_ENTRY(VIRTIO_NET_F_GUEST_USO4, \
+            "VIRTIO_NET_F_GUEST_USO4: Driver can receive USOv4"),
+    FEATURE_ENTRY(VIRTIO_NET_F_GUEST_USO6, \
+            "VIRTIO_NET_F_GUEST_USO4: Driver can receive USOv6"),
+    FEATURE_ENTRY(VIRTIO_NET_F_HOST_USO, \
+            "VIRTIO_NET_F_HOST_USO: Device can receive USO"),
     FEATURE_ENTRY(VIRTIO_NET_F_HASH_REPORT, \
             "VIRTIO_NET_F_HASH_REPORT: Hash reporting supported"),
     FEATURE_ENTRY(VIRTIO_NET_F_RSS, \
@@ -471,6 +486,18 @@ static const qmp_virtio_feature_map_t virtio_rng_feature_map[] = {
 };
 #endif
 
+/* virtio/vhost-gpio features mapping */
+#ifdef CONFIG_VHOST_USER_GPIO
+static const qmp_virtio_feature_map_t virtio_gpio_feature_map[] = {
+    FEATURE_ENTRY(VIRTIO_GPIO_F_IRQ, \
+            "VIRTIO_GPIO_F_IRQ: Device supports interrupts on GPIO lines"),
+    FEATURE_ENTRY(VHOST_USER_F_PROTOCOL_FEATURES, \
+            "VHOST_USER_F_PROTOCOL_FEATURES: Vhost-user protocol features "
+            "negotiation supported"),
+    { -1, "" }
+};
+#endif
+
 #define CONVERT_FEATURES(type, map, is_status, bitmap)   \
     ({                                                   \
         type *list = NULL;                               \
@@ -627,6 +654,12 @@ VirtioDeviceFeatures *qmp_decode_features(uint16_t device_id, uint64_t bitmap)
         features->dev_features =
             CONVERT_FEATURES(strList, virtio_rng_feature_map, 0, bitmap);
         break;
+#endif
+#ifdef CONFIG_VHOST_USER_GPIO
+    case VIRTIO_ID_GPIO:
+        features->dev_features =
+            CONVERT_FEATURES(strList, virtio_gpio_feature_map, 0, bitmap);
+        break;
 #endif
     /* No features */
     case VIRTIO_ID_9P:
@@ -653,7 +686,6 @@ VirtioDeviceFeatures *qmp_decode_features(uint16_t device_id, uint64_t bitmap)
     case VIRTIO_ID_DMABUF:
     case VIRTIO_ID_PARAM_SERV:
     case VIRTIO_ID_AUDIO_POLICY:
-    case VIRTIO_ID_GPIO:
         break;
     default:
         g_assert_not_reached();