diff --git a/docs/features.txt b/docs/features.txt
index 45224751600..2eabf8b1f0b 100644
--- a/docs/features.txt
+++ b/docs/features.txt
@@ -852,6 +852,7 @@ Rusticl extensions that are not part of any OpenCL version:
   cl_ext_buffer_device_address                          DONE (iris, llvmpipe, zink)
   cl_arm_non_uniform_work_group_size                    not started
   cl_arm_shared_virtual_memory                          in progress (nvc0)
+  cl_intel_required_subgroup_size                       in progress (available with RUSTICL_FEATURES=intel)
   cl_intel_subgroups                                    in progress (available with RUSTICL_FEATURES=intel)
   cl_intel_unified_shared_memory                        not started
 
diff --git a/src/gallium/frontends/rusticl/api/kernel.rs b/src/gallium/frontends/rusticl/api/kernel.rs
index 4ce2288be4c..0505fd3cc7e 100644
--- a/src/gallium/frontends/rusticl/api/kernel.rs
+++ b/src/gallium/frontends/rusticl/api/kernel.rs
@@ -118,6 +118,7 @@ unsafe impl CLInfoObj<cl_kernel_work_group_info, cl_device_id> for cl_kernel {
                 v.write::<usize>(kernel.preferred_simd_size(dev))
             }
             CL_KERNEL_PRIVATE_MEM_SIZE => v.write::<cl_ulong>(kernel.priv_mem_size(dev)),
+            CL_KERNEL_SPILL_MEM_SIZE_INTEL => v.write::<cl_ulong>(kernel.priv_mem_size(dev)),
             CL_KERNEL_WORK_GROUP_SIZE => v.write::<usize>(kernel.max_threads_per_block(dev)),
             // CL_INVALID_VALUE if param_name is not one of the supported values
             _ => Err(CL_INVALID_VALUE),
diff --git a/src/gallium/frontends/rusticl/core/device.rs b/src/gallium/frontends/rusticl/core/device.rs
index d7e67522e23..4cd2343be82 100644
--- a/src/gallium/frontends/rusticl/core/device.rs
+++ b/src/gallium/frontends/rusticl/core/device.rs
@@ -752,6 +752,7 @@ impl Device {
             add_ext(1, 0, 0, "cl_khr_subgroup_shuffle");
             add_ext(1, 0, 0, "cl_khr_subgroup_shuffle_relative");
             if self.intel_subgroups_supported() {
+                add_ext(1, 0, 0, "cl_intel_required_subgroup_size");
                 add_ext(1, 0, 0, "cl_intel_subgroups");
                 add_spirv(c"SPV_INTEL_subgroups");
             }