1 files changed, 66 insertions, 0 deletions
diff --git a/tests/qtest/vhost-user-test.c b/tests/qtest/vhost-user-test.c
index 4f4fcc09f5..e8d2da7228 100644
--- a/tests/qtest/vhost-user-test.c
+++ b/tests/qtest/vhost-user-test.c
@@ -32,6 +32,7 @@
 #include "standard-headers/linux/vhost_types.h"
 #include "standard-headers/linux/virtio_ids.h"
 #include "standard-headers/linux/virtio_net.h"
+#include "standard-headers/linux/virtio_gpio.h"
 
 #ifdef CONFIG_LINUX
 #include <sys/vfs.h>
@@ -53,9 +54,12 @@
 #define VHOST_MAX_VIRTQUEUES    0x100
 
 #define VHOST_USER_F_PROTOCOL_FEATURES 30
+#define VIRTIO_F_VERSION_1 32
+
 #define VHOST_USER_PROTOCOL_F_MQ 0
 #define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
 #define VHOST_USER_PROTOCOL_F_CROSS_ENDIAN   6
+#define VHOST_USER_PROTOCOL_F_CONFIG 9
 
 #define VHOST_LOG_PAGE 0x1000
 
@@ -140,6 +144,7 @@ enum {
 
 enum {
     VHOST_USER_NET,
+    VHOST_USER_GPIO,
 };
 
 typedef struct TestServer {
@@ -198,6 +203,19 @@ static void append_vhost_net_opts(TestServer *s, GString *cmd_line,
                            chr_opts, s->chr_name);
 }
 
+/*
+ * For GPIO there are no other magic devices we need to add (like
+ * block or netdev) so all we need to worry about is the vhost-user
+ * chardev socket.
+ */
+static void append_vhost_gpio_opts(TestServer *s, GString *cmd_line,
+                             const char *chr_opts)
+{
+    g_string_append_printf(cmd_line, QEMU_CMD_CHR,
+                           s->chr_name, s->socket_path,
+                           chr_opts);
+}
+
 static void append_mem_opts(TestServer *server, GString *cmd_line,
                             int size, enum test_memfd memfd)
 {
@@ -1090,3 +1108,51 @@ static void register_vhost_user_test(void)
                  test_multiqueue, &opts);
 }
 libqos_init(register_vhost_user_test);
+
+static uint64_t vu_gpio_get_features(TestServer *s)
+{
+    return 0x1ULL << VIRTIO_F_VERSION_1 |
+        0x1ULL << VIRTIO_GPIO_F_IRQ |
+        0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
+}
+
+/*
+ * This stub can't handle all the message types but we should reply
+ * that we support VHOST_USER_PROTOCOL_F_CONFIG as gpio would use it
+ * talking to a read vhost-user daemon.
+ */
+static void vu_gpio_get_protocol_features(TestServer *s, CharBackend *chr,
+                                          VhostUserMsg *msg)
+{
+    /* send back features to qemu */
+    msg->flags |= VHOST_USER_REPLY_MASK;
+    msg->size = sizeof(m.payload.u64);
+    msg->payload.u64 = 1ULL << VHOST_USER_PROTOCOL_F_CONFIG;
+
+    qemu_chr_fe_write_all(chr, (uint8_t *)msg, VHOST_USER_HDR_SIZE + msg->size);
+}
+
+static struct vhost_user_ops g_vu_gpio_ops = {
+    .type = VHOST_USER_GPIO,
+
+    .append_opts = append_vhost_gpio_opts,
+
+    .get_features = vu_gpio_get_features,
+    .set_features = vu_net_set_features,
+    .get_protocol_features = vu_gpio_get_protocol_features,
+};
+
+static void register_vhost_gpio_test(void)
+{
+    QOSGraphTestOptions opts = {
+        .before = vhost_user_test_setup,
+        .subprocess = true,
+        .arg = &g_vu_gpio_ops,
+    };
+
+    qemu_add_opts(&qemu_chardev_opts);
+
+    qos_add_test("read-guest-mem/memfile",
+                 "vhost-user-gpio", test_read_guest_mem, &opts);
+}
+libqos_init(register_vhost_gpio_test);