diff --git a/src/virgl_hw.h b/src/virgl_hw.h
index 2cdbf60..3a7ae75 100644
--- a/src/virgl_hw.h
+++ b/src/virgl_hw.h
@@ -439,6 +439,7 @@ enum virgl_formats {
 #define VIRGL_CAP_V2_UNTYPED_RESOURCE     (1 << 1)
 #define VIRGL_CAP_V2_VIDEO_MEMORY         (1 << 2)
 #define VIRGL_CAP_V2_MEMINFO              (1 << 3)
+#define VIRGL_CAP_V2_STRING_MARKER        (1 << 4)
 
 /* virgl bind flags - these are compatible with mesa 10.5 gallium.
  * but are fixed, no other should be passed to virgl either.
diff --git a/src/virgl_protocol.h b/src/virgl_protocol.h
index d8d7b16..19068ad 100644
--- a/src/virgl_protocol.h
+++ b/src/virgl_protocol.h
@@ -114,6 +114,7 @@ enum virgl_context_cmd {
    VIRGL_CCMD_PIPE_RESOURCE_CREATE,
    VIRGL_CCMD_PIPE_RESOURCE_SET_TYPE,
    VIRGL_CCMD_GET_MEMORY_INFO,
+   VIRGL_CCMD_SEND_STRING_MARKER,
    VIRGL_MAX_COMMANDS
 };
 
@@ -661,4 +662,9 @@ enum vrend_tweak_type {
 #define VIRGL_PIPE_RES_SET_TYPE_PLANE_STRIDE(plane) (9 + (plane) * 2)
 #define VIRGL_PIPE_RES_SET_TYPE_PLANE_OFFSET(plane) (10 + (plane) * 2)
 
+/* send string marker */
+#define VIRGL_SEND_STRING_MARKER_MIN_SIZE 2
+#define VIRGL_SEND_STRING_MARKER_STRING_SIZE 1
+#define VIRGL_SEND_STRING_MARKER_OFFSET 2
+
 #endif
diff --git a/src/vrend_debug.c b/src/vrend_debug.c
index bc7780c..b888ad2 100644
--- a/src/vrend_debug.c
+++ b/src/vrend_debug.c
@@ -80,6 +80,7 @@ static const char *command_names[VIRGL_MAX_COMMANDS] = {
    "PIPE_RESOURCE_CREATE",
    "PIPE_RESOURCE_SET_TYPE",
    "GET_MEMORY_INFO",
+   "SEND_STRING_MARKER",
 };
 
 static const char *object_type_names[VIRGL_MAX_OBJECTS] = {
diff --git a/src/vrend_decode.c b/src/vrend_decode.c
index bf162bd..919dcde 100644
--- a/src/vrend_decode.c
+++ b/src/vrend_decode.c
@@ -1561,6 +1561,26 @@ static int vrend_decode_get_memory_info(struct vrend_context *ctx, const uint32_
    return 0;
 }
 
+static int vrend_decode_send_string_marker(struct vrend_context *ctx, const uint32_t *buf, uint32_t length)
+{
+   int buf_len = sizeof(uint32_t) * (length - 1);
+
+   if (length < VIRGL_SEND_STRING_MARKER_MIN_SIZE) {
+      fprintf(stderr, "minimal command length not okay\n");
+      return EINVAL;
+   }
+
+   int32_t len = get_buf_entry(buf, VIRGL_SEND_STRING_MARKER_STRING_SIZE);
+   if (len > buf_len) {
+       fprintf(stderr, "String len %d > buf_len %d\n", len, buf_len);
+       return EINVAL;
+   }
+
+   vrend_context_emit_string_marker(ctx, len, get_buf_ptr(buf, VIRGL_SEND_STRING_MARKER_OFFSET));
+
+   return 0;
+}
+
 typedef int (*vrend_decode_callback)(struct vrend_context *ctx, const uint32_t *buf, uint32_t length);
 
 static int vrend_decode_dummy(struct vrend_context *ctx, const uint32_t *buf, uint32_t length)
@@ -1623,6 +1643,7 @@ static const vrend_decode_callback decode_table[VIRGL_MAX_COMMANDS] = {
    [VIRGL_CCMD_PIPE_RESOURCE_CREATE] = vrend_decode_pipe_resource_create,
    [VIRGL_CCMD_PIPE_RESOURCE_SET_TYPE] = vrend_decode_pipe_resource_set_type,
    [VIRGL_CCMD_GET_MEMORY_INFO] = vrend_decode_get_memory_info,
+   [VIRGL_CCMD_SEND_STRING_MARKER] = vrend_decode_send_string_marker,
 };
 
 static int vrend_decode_ctx_submit_cmd(struct virgl_context *ctx,
diff --git a/src/vrend_renderer.c b/src/vrend_renderer.c
index af38be5..f390a52 100644
--- a/src/vrend_renderer.c
+++ b/src/vrend_renderer.c
@@ -158,6 +158,7 @@ enum features_id
    feat_indep_blend_func,
    feat_indirect_draw,
    feat_indirect_params,
+   feat_khr_debug,
    feat_memory_object,
    feat_memory_object_fd,
    feat_mesa_invert,
@@ -257,6 +258,7 @@ static const  struct {
    FEAT(indep_blend_func, 40, 32,  "GL_ARB_draw_buffers_blend", "GL_OES_draw_buffers_indexed"),
    FEAT(indirect_draw, 40, 31,  "GL_ARB_draw_indirect" ),
    FEAT(indirect_params, 46, UNAVAIL,  "GL_ARB_indirect_parameters" ),
+   FEAT(khr_debug, 43, 32,  "GL_KHR_debug" ),
    FEAT(memory_object, UNAVAIL, UNAVAIL, "GL_EXT_memory_object"),
    FEAT(memory_object_fd, UNAVAIL, UNAVAIL, "GL_EXT_memory_object_fd"),
    FEAT(mesa_invert, UNAVAIL, UNAVAIL,  "GL_MESA_pack_invert" ),
@@ -10420,6 +10422,8 @@ static void vrend_renderer_fill_caps_v2(int gl_ver, int gles_ver,  union virgl_c
       caps->v2.capability_bits_v2 |= VIRGL_CAP_V2_MEMINFO;
    }
 
+   if (has_feature(feat_khr_debug))
+       caps->v2.capability_bits_v2 |= VIRGL_CAP_V2_STRING_MARKER;
 }
 
 void vrend_renderer_fill_caps(uint32_t set, uint32_t version,
@@ -11132,3 +11136,21 @@ static uint32_t vrend_renderer_get_video_memory(void)
 
    return video_memory;
 }
+
+void vrend_context_emit_string_marker(struct vrend_context *ctx, GLsizei length, const char * message)
+{
+    VREND_DEBUG(dbg_khr, ctx, "MARKER: '%.*s'\n", length, message);
+
+    if (has_feature(feat_khr_debug))  {
+        if (vrend_state.use_gles)
+            glDebugMessageInsertKHR(GL_DEBUG_SOURCE_APPLICATION_KHR,
+                                    GL_DEBUG_TYPE_MARKER_KHR,
+                                    0, GL_DEBUG_SEVERITY_NOTIFICATION,
+                                    length, message);
+        else
+            glDebugMessageInsert(GL_DEBUG_SOURCE_APPLICATION,
+                                 GL_DEBUG_TYPE_MARKER,
+                                 0, GL_DEBUG_SEVERITY_NOTIFICATION_KHR,
+                                 length, message);
+    }
+}
diff --git a/src/vrend_renderer.h b/src/vrend_renderer.h
index 297fc5c..9c0a0fa 100644
--- a/src/vrend_renderer.h
+++ b/src/vrend_renderer.h
@@ -521,4 +521,6 @@ int vrend_renderer_resource_map(struct pipe_resource *pres, void **map, uint64_t
 int vrend_renderer_resource_unmap(struct pipe_resource *pres);
 
 void vrend_renderer_get_meminfo(struct vrend_context *ctx, uint32_t res_handle);
+
+void vrend_context_emit_string_marker(struct vrend_context *ctx, GLsizei length, const char * message);
 #endif