diff --git a/src/gallium/auxiliary/driver_noop/noop_pipe.c b/src/gallium/auxiliary/driver_noop/noop_pipe.c
index c737b756ccb..4a20c735e9f 100644
--- a/src/gallium/auxiliary/driver_noop/noop_pipe.c
+++ b/src/gallium/auxiliary/driver_noop/noop_pipe.c
@@ -743,6 +743,15 @@ static void noop_vertex_state_destroy(struct pipe_screen *screen,
    FREE(state);
 }
 
+static void noop_set_fence_timeline_value(struct pipe_screen *screen,
+                                          struct pipe_fence_handle *fence,
+                                          uint64_t value)
+{
+   struct noop_pipe_screen *noop_screen = (struct noop_pipe_screen *)screen;
+   struct pipe_screen *oscreen = noop_screen->oscreen;
+   oscreen->set_fence_timeline_value(oscreen, fence, value);
+}
+
 struct pipe_screen *noop_screen_create(struct pipe_screen *oscreen)
 {
    struct noop_pipe_screen *noop_screen;
@@ -800,6 +809,8 @@ struct pipe_screen *noop_screen_create(struct pipe_screen *oscreen)
    screen->vertex_state_destroy = noop_vertex_state_destroy;
    if (oscreen->get_sparse_texture_virtual_page_size)
       screen->get_sparse_texture_virtual_page_size = noop_get_sparse_texture_virtual_page_size;
+   if (oscreen->set_fence_timeline_value)
+      screen->set_fence_timeline_value = noop_set_fence_timeline_value;
 
    slab_create_parent(&noop_screen->pool_transfers,
                       sizeof(struct pipe_transfer), 64);
diff --git a/src/gallium/auxiliary/driver_trace/tr_screen.c b/src/gallium/auxiliary/driver_trace/tr_screen.c
index b2f302ed477..d964b42b0ad 100644
--- a/src/gallium/auxiliary/driver_trace/tr_screen.c
+++ b/src/gallium/auxiliary/driver_trace/tr_screen.c
@@ -1332,6 +1332,22 @@ static void trace_screen_vertex_state_destroy(struct pipe_screen *_screen,
    screen->vertex_state_destroy(screen, state);
 }
 
+static void trace_screen_set_fence_timeline_value(struct pipe_screen *_screen,
+                                                  struct pipe_fence_handle *fence,
+                                                  uint64_t value)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct pipe_screen *screen = tr_scr->screen;
+
+   trace_dump_call_begin("pipe_screen", "set_fence_timeline_value");
+   trace_dump_arg(ptr, screen);
+   trace_dump_arg(ptr, fence);
+   trace_dump_arg(uint, value);
+   trace_dump_call_end();
+
+   screen->set_fence_timeline_value(screen, fence, value);
+}
+
 bool
 trace_enabled(void)
 {
@@ -1436,6 +1452,7 @@ trace_screen_create(struct pipe_screen *screen)
    SCR_INIT(vertex_state_destroy);
    tr_scr->base.transfer_helper = screen->transfer_helper;
    SCR_INIT(get_sparse_texture_virtual_page_size);
+   SCR_INIT(set_fence_timeline_value);
 
    tr_scr->screen = screen;
 
diff --git a/src/gallium/include/pipe/p_screen.h b/src/gallium/include/pipe/p_screen.h
index 5848183417b..596319426e2 100644
--- a/src/gallium/include/pipe/p_screen.h
+++ b/src/gallium/include/pipe/p_screen.h
@@ -724,6 +724,14 @@ struct pipe_screen {
     */
    pipe_create_vertex_state_func create_vertex_state;
    pipe_vertex_state_destroy_func vertex_state_destroy;
+
+   /**
+    * Update a timeline semaphore value stored within a driver fence object.
+    * Future waits and signals will use the new value.
+    */
+   void (*set_fence_timeline_value)(struct pipe_screen *screen,
+                                    struct pipe_fence_handle *fence,
+                                    uint64_t value);
 };
 
 
diff --git a/src/mesa/main/externalobjects.c b/src/mesa/main/externalobjects.c
index 02ed37f4fb1..13dbbcf045b 100644
--- a/src/mesa/main/externalobjects.c
+++ b/src/mesa/main/externalobjects.c
@@ -855,15 +855,6 @@ _mesa_IsSemaphoreEXT(GLuint semaphore)
 static void
 semaphore_parameter_stub(const char* func, GLenum pname)
 {
-   GET_CURRENT_CONTEXT(ctx);
-
-   if (!ctx->Extensions.EXT_semaphore) {
-      _mesa_error(ctx, GL_INVALID_OPERATION, "%s(unsupported)", func);
-      return;
-   }
-
-   /* EXT_semaphore and EXT_semaphore_fd define no parameters */
-   _mesa_error(ctx, GL_INVALID_ENUM, "%s(pname=0x%x)", func, pname);
 }
 
 void GLAPIENTRY
@@ -871,9 +862,31 @@ _mesa_SemaphoreParameterui64vEXT(GLuint semaphore,
                                  GLenum pname,
                                  const GLuint64 *params)
 {
+   GET_CURRENT_CONTEXT(ctx);
    const char *func = "glSemaphoreParameterui64vEXT";
 
-   semaphore_parameter_stub(func, pname);
+   if (!ctx->Extensions.EXT_semaphore) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "%s(unsupported)", func);
+      return;
+   }
+
+   if (pname != GL_D3D12_FENCE_VALUE_EXT) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "%s(pname=0x%x)", func, pname);
+      return;
+   }
+
+   struct gl_semaphore_object *semObj = _mesa_lookup_semaphore_object(ctx,
+                                                                      semaphore);
+   if (!semObj)
+      return;
+
+   if (semObj->type != PIPE_FD_TYPE_TIMELINE_SEMAPHORE) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "%s(Not a D3D12 fence)", func);
+      return;
+   }
+
+   semObj->timeline_value = params[0];
+   ctx->screen->set_fence_timeline_value(ctx->screen, semObj->fence, params[0]);
 }
 
 void GLAPIENTRY
@@ -881,9 +894,30 @@ _mesa_GetSemaphoreParameterui64vEXT(GLuint semaphore,
                                     GLenum pname,
                                     GLuint64 *params)
 {
+   GET_CURRENT_CONTEXT(ctx);
    const char *func = "glGetSemaphoreParameterui64vEXT";
 
-   semaphore_parameter_stub(func, pname);
+   if (!ctx->Extensions.EXT_semaphore) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "%s(unsupported)", func);
+      return;
+   }
+
+   if (pname != GL_D3D12_FENCE_VALUE_EXT) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "%s(pname=0x%x)", func, pname);
+      return;
+   }
+
+   struct gl_semaphore_object *semObj = _mesa_lookup_semaphore_object(ctx,
+                                                                      semaphore);
+   if (!semObj)
+      return;
+
+   if (semObj->type != PIPE_FD_TYPE_TIMELINE_SEMAPHORE) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "%s(Not a D3D12 fence)", func);
+      return;
+   }
+
+   params[0] = semObj->timeline_value;
 }
 
 void GLAPIENTRY
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index e99093d349e..ba43cea3009 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -3070,6 +3070,7 @@ struct gl_semaphore_object
    GLuint Name;            /**< hash table ID/name */
    struct pipe_fence_handle *fence;
    enum pipe_fd_type type;
+   uint64_t timeline_value;
 };
 
 /**