From f498f864fbc0472004ee1c3616c1188c68eb157f Mon Sep 17 00:00:00 2001
From: Mendy Berger <12537668+MendyBerger@users.noreply.github.com>
Date: Wed, 7 Oct 2026 00:29:30 -0400
Subject: [PATCH] ggml-webgpu: no dawn native features on wasi (#27069)

---
 ggml/src/ggml-webgpu/ggml-webgpu.cpp | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/ggml/src/ggml-webgpu/ggml-webgpu.cpp b/ggml/src/ggml-webgpu/ggml-webgpu.cpp
index a7986b9c7..ebc8a5e78 100644
--- a/ggml/src/ggml-webgpu/ggml-webgpu.cpp
+++ b/ggml/src/ggml-webgpu/ggml-webgpu.cpp
@@ -4104,7 +4104,7 @@ static void ggml_webgpu_init_memset_pipeline(webgpu_global_context & ctx) {
 static void ggml_backend_webgpu_request_adapter(wgpu::Instance & instance, wgpu::Adapter & adapter) {
     wgpu::RequestAdapterOptions options = {};
 
-#ifndef __EMSCRIPTEN__
+#if !defined(__EMSCRIPTEN__) && !defined(__wasi__)
     // TODO: track need for these toggles: https://issues.chromium.org/issues/42251215
     const char * const          adapterEnabledToggles[] = { "vulkan_enable_f16_on_nvidia", "use_vulkan_memory_model" };
     wgpu::DawnTogglesDescriptor adapterTogglesDesc;
@@ -4133,7 +4133,7 @@ static void create_webgpu_device(ggml_backend_webgpu_reg_context * ctx) {
     ctx->webgpu_global_ctx->adapter.GetLimits(&ctx->webgpu_global_ctx->capabilities.limits);
 
     wgpu::AdapterInfo info{};
-#ifndef __EMSCRIPTEN__
+#if !defined(__EMSCRIPTEN__) && !defined(__wasi__)
     wgpu::AdapterPropertiesSubgroupMatrixConfigs subgroup_matrix_configs{};
     if (ctx->webgpu_global_ctx->adapter.HasFeature(wgpu::FeatureName::ChromiumExperimentalSubgroupMatrix)) {
         info.nextInChain = &subgroup_matrix_configs;
@@ -4150,7 +4150,7 @@ static void create_webgpu_device(ggml_backend_webgpu_reg_context * ctx) {
         wgpu::WGSLLanguageFeatureName::Packed4x8IntegerDotProduct);
 
     bool valid_subgroup_matrix_config = false;
-#ifndef __EMSCRIPTEN__
+#if !defined(__EMSCRIPTEN__) && !defined(__wasi__)
     // Accept f16 subgroup matrix configurations (square or non-square).
     // NVIDIA GPUs typically report square configs (e.g. 16x16x16),
     // while Intel Xe2 GPUs report non-square configs (e.g. 8x16x16).
@@ -4178,7 +4178,7 @@ static void create_webgpu_device(ggml_backend_webgpu_reg_context * ctx) {
     // Initialize device
     std::vector<wgpu::FeatureName> required_features       = { wgpu::FeatureName::ShaderF16 };
 
-#ifndef __EMSCRIPTEN__
+#if !defined(__EMSCRIPTEN__) && !defined(__wasi__)
     required_features.push_back(wgpu::FeatureName::ImplicitDeviceSynchronization);
     if (ctx->webgpu_global_ctx->capabilities.supports_subgroup_matrix) {
         required_features.push_back(wgpu::FeatureName::ChromiumExperimentalSubgroupMatrix);
@@ -4214,7 +4214,7 @@ static void create_webgpu_device(ggml_backend_webgpu_reg_context * ctx) {
                        std::string(message).c_str());
         });
 
-#ifndef __EMSCRIPTEN__
+#if !defined(__EMSCRIPTEN__) && !defined(__wasi__)
     // Enable Dawn-specific toggles to increase native performance
     // TODO: Maybe WebGPU needs a "fast" mode where you can request compilers skip adding checks like these,
     //       only for native performance?
@@ -4865,7 +4865,7 @@ ggml_backend_reg_t ggml_backend_webgpu_reg() {
     instance_descriptor.requiredFeatures                     = instance_features.data();
     instance_descriptor.requiredFeatureCount                 = instance_features.size();
 
-#ifndef __EMSCRIPTEN__
+#if !defined(__EMSCRIPTEN__) && !defined(__wasi__)
     const char * const          instanceEnabledToggles[] = { "allow_unsafe_apis" };
     wgpu::DawnTogglesDescriptor instanceTogglesDesc;
     instanceTogglesDesc.enabledToggles     = instanceEnabledToggles;
@@ -4885,7 +4885,7 @@ ggml_backend_reg_t ggml_backend_webgpu_reg() {
 
     // WebGPU backend requires f16 support and, on native, implicit device synchronization.
     if (adapter != nullptr && adapter.HasFeature(wgpu::FeatureName::ShaderF16)
-#ifndef __EMSCRIPTEN__
+#if !defined(__EMSCRIPTEN__) && !defined(__wasi__)
         && adapter.HasFeature(wgpu::FeatureName::ImplicitDeviceSynchronization)
 #endif
     ) {