chux0519 · Oct 27, 2026 · Oct 27, 2026 · Oct 27, 2026 · Oct 27, 2026 · Oct 27, 2026
diff --git a/.vendor/ggml-upstream.json b/.vendor/ggml-upstream.json
@@ -6,16 +6,16 @@
     "subdirectory": "ggml"
   },
   "current": {
-    "ref": "b8833",
-    "commit": "45cac7ca703fb9085eae62b9121fca01d20177f6",
-    "imported_in": "f5bb1543e899bacc11b90330632adfdf6cffd811",
-    "date": "2026-04-25",
-    "notes": "Exact upstream ref recorded."
+    "ref": "b11913",
+    "commit": "7aca0d2ea8d92b56911233b822db01f9fbb1ae50",
+    "imported_in": "ggml-b11913",
+    "date": "2026-10-27",
+    "notes": "Exact upstream ref recorded; local overlay (GTE ops, repack tweaks, llamafile fallback fix, WebGPU GTE kernels) re-applied with a 3-way merge against pristine b8833."
   },
   "latest_checked": {
-    "date": "2026-04-24",
-    "ref": "b8833",
-    "commit": "45cac7c",
+    "date": "2026-10-27",
+    "ref": "b11913",
+    "commit": "7aca0d2",
     "source": "https://github.com/ggml-org/llama.cpp/releases"
   },
   "local_policy": {

diff --git a/README.md b/README.md
@@ -61,6 +61,21 @@ cmake --build build --target quantize
 .\build\Release\quantize.exe .\models\bge-m3.fp16.gguf .\models\bge-m3.q4_k.gguf q4_k
 ```
 
+Mixed quantization: `EMBEDDINGS_CPP_SKIP_QUANT_PATTERNS` (comma-separated
+substrings of tensor names) keeps matching tensors as they are, and already
+quantized tensors are never re-quantized, so two passes give a mix. For
+bge-m3, q4_k MLP and vocabulary with q8_0 attention matches q8_0 retrieval
+quality and is ~40% faster on x86 (AVX2), 384 MB instead of 612 MB:
+
+```bash
+EMBEDDINGS_CPP_SKIP_QUANT_PATTERNS='attention.,position_embeddings' \
+  ./build/quantize models/bge-m3.fp16.gguf models/bge-m3.q4_k_mlp_emb.tmp.gguf q4_k
+./build/quantize models/bge-m3.q4_k_mlp_emb.tmp.gguf models/bge-m3.q4_k_mlp_emb_q8_attn.gguf q8_0
+```
+
+On Apple silicon q8_0 stays faster on CPU (i8mm repack); with Metal both run
+at the same speed.
+
 ### Supported Quantization Types
 
 - `q4_k`: 4-bit quantization with K-means clustering (good balance of size and quality)
@@ -441,8 +456,11 @@ Endpoints:
   was cut to `--max-tokens` has `"truncated": true`.
 - `POST /embed`: TEI-compatible (`inputs`, `normalize`, `truncate`; with
   `"truncate": false` an over-long input is rejected with 413).
-- `GET /health`, `GET /ready`, `GET /info` (model, architecture, dimensions,
-  pooling, max tokens, limits), `GET /v1/models`.
+- `GET /health`, `GET /ready`, `GET /info` (model, architecture, ftype,
+  `weight_types`, dimensions, pooling, max tokens, limits), `GET /v1/models`.
+  `weight_types` lists matrix weight types with counts (`"q4_K:49,q8_0:97"`);
+  unlike the file-level `ftype` it tells mixed quantizations apart, so clients
+  can use it to decide whether vectors from two servers are comparable.
 
 One model instance serves all requests; inference is serialized (ggml
 parallelizes inside a batch). Errors use the OpenAI error shape.

diff --git a/ggml/CMakeLists.txt b/ggml/CMakeLists.txt
@@ -1,17 +1,11 @@
 cmake_minimum_required(VERSION 3.14...3.28) # for add_link_options and implicit target directories.
 
-# ref: https://cmake.org/cmake/help/latest/policy/CMP0194.html
-# MSVC is not a valid assembler for the ASM language.
-# Set to NEW to avoid a warning on CMake 4.1+ with MSVC.
-if (POLICY CMP0194)
-    cmake_policy(SET CMP0194 NEW)
-endif()
 project("ggml" C CXX ASM)
 
 ### GGML Version
 set(GGML_VERSION_MAJOR 0)
-set(GGML_VERSION_MINOR 9)
-set(GGML_VERSION_PATCH 11)
+set(GGML_VERSION_MINOR 27)
+set(GGML_VERSION_PATCH 0)
 set(GGML_VERSION_BASE "${GGML_VERSION_MAJOR}.${GGML_VERSION_MINOR}.${GGML_VERSION_PATCH}")
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/")
@@ -203,26 +197,26 @@ set(GGML_BLAS_VENDOR ${GGML_BLAS_VENDOR_DEFAULT} CACHE STRING
 option(GGML_LLAMAFILE                       "ggml: use LLAMAFILE"                             ${GGML_LLAMAFILE_DEFAULT})
 
 option(GGML_CUDA                            "ggml: use CUDA"                                  OFF)
+set   (GGML_CUDA_CCCL_VERSION "" CACHE STRING "ggml: CCCL git tag to fetch, empty to use the version bundled with the installed CUDA Toolkit")
 option(GGML_MUSA                            "ggml: use MUSA"                                  OFF)
 option(GGML_CUDA_FORCE_MMQ                  "ggml: use mmq kernels instead of cuBLAS"         OFF)
 option(GGML_CUDA_FORCE_CUBLAS               "ggml: always use cuBLAS instead of mmq kernels"  OFF)
-set   (GGML_CUDA_PEER_MAX_BATCH_SIZE "128" CACHE STRING
-                                            "ggml: max. batch size for using peer access")
 option(GGML_CUDA_NO_PEER_COPY               "ggml: do not use peer to peer copies"            OFF)
 option(GGML_CUDA_NO_VMM                     "ggml: do not try to use CUDA VMM"                OFF)
 option(GGML_CUDA_FA                         "ggml: compile ggml FlashAttention CUDA kernels"  ON)
 option(GGML_CUDA_FA_ALL_QUANTS              "ggml: compile all quants for FlashAttention"     OFF)
+set   (GGML_CUDA_FA_QUANTS "q4_0-q4_0;q8_0-q8_0;f16-f16;bf16-bf16" CACHE STRING
+                                            "ggml: FlashAttention K-V type combinations to compile, \"all\" or a list such as \"q8_0-q8_0;q8_0-q4_0\"")
 option(GGML_CUDA_GRAPHS                     "ggml: use CUDA graphs (llama.cpp only)"          ${GGML_CUDA_GRAPHS_DEFAULT})
 option(GGML_CUDA_NCCL                       "ggml: use NVIDIA Collective Comm. Library"       ON)
 set   (GGML_CUDA_COMPRESSION_MODE "size" CACHE STRING
                                             "ggml: cuda link binary compression mode; requires cuda 12.8+")
 set_property(CACHE GGML_CUDA_COMPRESSION_MODE PROPERTY STRINGS "none;speed;balance;size")
 
 option(GGML_HIP                             "ggml: use HIP"                                   OFF)
-option(GGML_HIP_GRAPHS                      "ggml: use HIP graph, experimental, slow"         OFF)
+option(GGML_HIP_GRAPHS                      "ggml: use HIP graph"                              ON)
 option(GGML_HIP_RCCL                        "ggml: use ROCm Collective Comm. Library"         OFF)
 option(GGML_HIP_NO_VMM                      "ggml: do not try to use HIP VMM"                 ON)
-option(GGML_HIP_ROCWMMA_FATTN               "ggml: enable rocWMMA for FlashAttention"         OFF)
 option(GGML_HIP_MMQ_MFMA                    "ggml: enable MFMA MMA for CDNA in MMQ"           ON)
 option(GGML_HIP_EXPORT_METRICS              "ggml: enable kernel perf metrics output"         OFF)
 option(GGML_MUSA_GRAPHS                     "ggml: use MUSA graph, experimental, unstable"    OFF)
@@ -249,19 +243,25 @@ option(GGML_METAL_EMBED_LIBRARY             "ggml: embed Metal library"
 set   (GGML_METAL_MACOSX_VERSION_MIN "" CACHE STRING
                                             "ggml: metal minimum macOS version")
 set   (GGML_METAL_STD "" CACHE STRING       "ggml: metal standard version (-std flag)")
+set   (GGML_METAL_TARGET_OS "macos" CACHE STRING
+                                            "ggml: metal -mtargetos OS name (macos, ios, xros, tvos)")
 option(GGML_OPENMP                          "ggml: use OpenMP"                                ON)
+option(GGML_OPENMP_FETCH                    "ggml: fetch LLVM OpenMP"                         OFF)
 option(GGML_RPC                             "ggml: use RPC"                                   OFF)
 option(GGML_SYCL                            "ggml: use SYCL"                                  OFF)
 option(GGML_SYCL_F16                        "ggml: use 16 bit floats for sycl calculations"   OFF)
 option(GGML_SYCL_GRAPH                      "ggml: enable graphs in the SYCL backend"         ON)
 option(GGML_SYCL_HOST_MEM_FALLBACK          "ggml: allow host memory fallback in SYCL reorder (requires kernel 6.8+)" ON)
+option(GGML_SYCL_SUPPORT_LEVEL_ZERO_API     "ggml: use Level Zero API in SYCL backend"  ON)
 option(GGML_SYCL_DNN                        "ggml: enable oneDNN in the SYCL backend"         ON)
 set   (GGML_SYCL_TARGET "INTEL" CACHE STRING
                                             "ggml: sycl target device")
 set   (GGML_SYCL_DEVICE_ARCH "" CACHE STRING
                                             "ggml: sycl device architecture")
 
 option(GGML_OPENVINO                        "ggml: use OPENVINO"                              OFF)
+option(GGML_ET                              "ggml: use ET backend"                            OFF)
+option(GGML_ET_SYSEMU                       "ggml: use ET backend via sysemu"                 OFF)
 
 option(GGML_OPENCL                          "ggml: use OpenCL"                                OFF)
 option(GGML_OPENCL_PROFILING                "ggml: use OpenCL profiling (increases overhead)" OFF)
@@ -271,7 +271,6 @@ set   (GGML_OPENCL_TARGET_VERSION "300" CACHE STRING
                                             "ggml: OpenCL API version to target")
 
 option(GGML_HEXAGON                         "ggml: enable Hexagon backend"                    OFF)
-set(GGML_HEXAGON_FP32_QUANTIZE_GROUP_SIZE 128 CACHE STRING "ggml: quantize group size (32, 64, or 128)")
 
 # toolchain for vulkan-shaders-gen
 set   (GGML_VULKAN_SHADERS_GEN_TOOLCHAIN "" CACHE FILEPATH "ggml: toolchain file for vulkan-shaders-gen")
@@ -346,9 +345,6 @@ set(GGML_PUBLIC_HEADERS
     include/gguf.h)
 
 set_target_properties(ggml PROPERTIES PUBLIC_HEADER "${GGML_PUBLIC_HEADERS}")
-#if (GGML_METAL)
-#    set_target_properties(ggml PROPERTIES RESOURCE "${CMAKE_CURRENT_SOURCE_DIR}/src/ggml-metal.metal")
-#endif()
 install(TARGETS ggml LIBRARY PUBLIC_HEADER)
 install(TARGETS ggml-base LIBRARY)
 
@@ -358,7 +354,7 @@ if (GGML_STANDALONE)
         @ONLY)
 
     install(FILES ${CMAKE_CURRENT_BINARY_DIR}/ggml.pc
-        DESTINATION share/pkgconfig)
+        DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 endif()
 
 #
@@ -407,19 +403,15 @@ configure_package_config_file(
               GGML_BIN_INSTALL_DIR)
 
 write_basic_package_version_file(
-        ${CMAKE_CURRENT_BINARY_DIR}/ggml-version.cmake
+        ${CMAKE_CURRENT_BINARY_DIR}/ggml-config-version.cmake
     VERSION ${GGML_INSTALL_VERSION}
     COMPATIBILITY SameMajorVersion)
 
-target_compile_definitions(ggml-base PRIVATE
-    GGML_VERSION="${GGML_INSTALL_VERSION}"
-    GGML_COMMIT="${GGML_BUILD_COMMIT}"
-)
 message(STATUS "ggml version: ${GGML_INSTALL_VERSION}")
 message(STATUS "ggml commit:  ${GGML_BUILD_COMMIT}")
 
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/ggml-config.cmake
-              ${CMAKE_CURRENT_BINARY_DIR}/ggml-version.cmake
+              ${CMAKE_CURRENT_BINARY_DIR}/ggml-config-version.cmake
         DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/ggml)
 
 if (MSVC)

diff --git a/ggml/cmake/common.cmake b/ggml/cmake/common.cmake
@@ -2,10 +2,16 @@ function(ggml_get_flags CCID CCVER)
     set(C_FLAGS "")
     set(CXX_FLAGS "")
 
-    if (CCID MATCHES "Clang")
+    if (CCID MATCHES "Clang" OR CCID MATCHES "IntelLLVM")
         set(C_FLAGS   -Wunreachable-code-break -Wunreachable-code-return)
         set(CXX_FLAGS -Wunreachable-code-break -Wunreachable-code-return -Wmissing-prototypes -Wextra-semi)
 
+        if (CCID STREQUAL "IntelLLVM")
+            # for Intel DPC++ and LLVM SYCL, using debug does not disable optimization
+            list(APPEND C_FLAGS    -Rno-debug-disables-optimization)
+            list(APPEND CXX_FLAGS  -Rno-debug-disables-optimization)
+        endif()
+
         if (
             (CCID STREQUAL "Clang"      AND CCVER VERSION_GREATER_EQUAL 3.8.0) OR
             (CCID STREQUAL "AppleClang" AND CCVER VERSION_GREATER_EQUAL 7.3.0)
@@ -28,6 +34,7 @@ endfunction()
 function(ggml_get_system_arch)
     if (CMAKE_OSX_ARCHITECTURES      STREQUAL "arm64" OR
         CMAKE_GENERATOR_PLATFORM_LWR STREQUAL "arm64" OR
+        (CMAKE_GENERATOR_PLATFORM_LWR STREQUAL "arm64ec" AND MSVC AND NOT CMAKE_C_COMPILER_ID STREQUAL "Clang") OR
         (NOT CMAKE_OSX_ARCHITECTURES AND NOT CMAKE_GENERATOR_PLATFORM_LWR AND
             CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64|arm.*|ARM64)$"))
         set(GGML_SYSTEM_ARCH "ARM" PARENT_SCOPE)
@@ -48,3 +55,74 @@ function(ggml_get_system_arch)
         set(GGML_SYSTEM_ARCH "UNKNOWN" PARENT_SCOPE)
     endif()
 endfunction()
+
+# Determines which FlashAttention vector kernel template instances to compile, returns them in OUT_SRCS.
+function(ggml_cuda_fattn_vec_instances DIR OUT_SRCS)
+    set(FA_TYPES q4_0 q4_1 q5_0 q5_1 q8_0 bf16 f16)
+
+    string(TOLOWER "${GGML_CUDA_FA_QUANTS}" FA_QUANTS)
+    string(STRIP   "${FA_QUANTS}" FA_QUANTS)
+    if (GGML_CUDA_FA_ALL_QUANTS)
+        message(WARNING "GGML_CUDA_FA_ALL_QUANTS is deprecated, use GGML_CUDA_FA_QUANTS=all instead")
+        set(FA_QUANTS all)
+    endif()
+    if (NOT FA_QUANTS)
+        message(FATAL_ERROR "GGML_CUDA_FA_QUANTS must not be empty")
+    endif()
+
+    if (FA_QUANTS STREQUAL "all")
+        set(FA_COMBINATIONS "")
+        foreach (TYPE_V IN LISTS FA_TYPES)
+            foreach (TYPE_K IN LISTS FA_TYPES)
+                list(APPEND FA_COMBINATIONS ${TYPE_K}-${TYPE_V})
+            endforeach()
+        endforeach()
+    else()
+        set(FA_COMBINATIONS f16-f16)
+
+        string(REPLACE "," ";" FA_SELECTED "${FA_QUANTS}")
+        foreach (COMBINATION IN LISTS FA_SELECTED)
+            string(STRIP   "${COMBINATION}" COMBINATION)
+            if (NOT COMBINATION MATCHES "^([a-z0-9_]+)-([a-z0-9_]+)$")
+                message(FATAL_ERROR "GGML_CUDA_FA_QUANTS: \"${COMBINATION}\" is not \"all\" or a <type_K>-<type_V> combination")
+            endif()
+            set(TYPE_K ${CMAKE_MATCH_1})
+            set(TYPE_V ${CMAKE_MATCH_2})
+            foreach (TYPE ${TYPE_K} ${TYPE_V})
+                if (NOT TYPE IN_LIST FA_TYPES)
+                    message(FATAL_ERROR
+                        "GGML_CUDA_FA_QUANTS: unknown type \"${TYPE}\" in \"${COMBINATION}\", must be one of: ${FA_TYPES}")
+                endif()
+            endforeach()
+            list(APPEND FA_COMBINATIONS ${TYPE_K}-${TYPE_V})
+        endforeach()
+    endif()
+    list(REMOVE_DUPLICATES FA_COMBINATIONS)
+
+    string(REPLACE ";" "," FA_QUANTS_DEFINE "${FA_QUANTS}")
+    add_compile_definitions(GGML_CUDA_FA_QUANTS="${FA_QUANTS_DEFINE}")
+    foreach (TYPE_V IN LISTS FA_TYPES)
+        foreach (TYPE_K IN LISTS FA_TYPES)
+            if ("${TYPE_K}-${TYPE_V}" IN_LIST FA_COMBINATIONS)
+                set(COMPILED 1)
+            else()
+                set(COMPILED 0)
+            endif()
+            string(TOUPPER "GGML_CUDA_FA_${TYPE_K}_${TYPE_V}" COMBINATION_DEF)
+            add_compile_definitions(${COMBINATION_DEF}=${COMPILED})
+        endforeach()
+    endforeach()
+
+    message(STATUS "FlashAttention K-V type combinations: ${FA_COMBINATIONS}")
+
+    set(SRCS "")
+    foreach (COMBINATION IN LISTS FA_COMBINATIONS)
+        set(SRC "${DIR}/template-instances/fattn-vec-instance-${COMBINATION}.cu")
+        if (NOT EXISTS "${SRC}")
+            message(FATAL_ERROR "FlashAttention template instance \"${SRC}\" does not exist")
+        endif()
+        list(APPEND SRCS "${SRC}")
+    endforeach()
+
+    set(${OUT_SRCS} ${SRCS} PARENT_SCOPE)
+endfunction()
diff --git a/ggml/cmake/ggml-config.cmake.in b/ggml/cmake/ggml-config.cmake.in
@@ -6,6 +6,7 @@
 include(CMakeFindDependencyMacro)
 find_dependency(Threads)
 if (NOT GGML_SHARED_LIB)
+    set(GGML_BASE_INTERFACE_LINK_LIBRARIES "")
     set(GGML_CPU_INTERFACE_LINK_LIBRARIES "")
     set(GGML_CPU_INTERFACE_LINK_OPTIONS   "")
 
@@ -20,7 +21,15 @@ if (NOT GGML_SHARED_LIB)
 
     if (GGML_OPENMP_ENABLED)
         find_dependency(OpenMP)
-        list(APPEND GGML_CPU_INTERFACE_LINK_LIBRARIES OpenMP::OpenMP_C OpenMP::OpenMP_CXX)
+        set(GGML_OPENMP_INTERFACE_LINK_LIBRARIES "")
+        if (TARGET OpenMP::OpenMP_C)
+            list(APPEND GGML_OPENMP_INTERFACE_LINK_LIBRARIES OpenMP::OpenMP_C)
+        endif()
+        if (TARGET OpenMP::OpenMP_CXX)
+            list(APPEND GGML_OPENMP_INTERFACE_LINK_LIBRARIES OpenMP::OpenMP_CXX)
+        endif()
+        list(APPEND GGML_BASE_INTERFACE_LINK_LIBRARIES ${GGML_OPENMP_INTERFACE_LINK_LIBRARIES})
+        list(APPEND GGML_CPU_INTERFACE_LINK_LIBRARIES ${GGML_OPENMP_INTERFACE_LINK_LIBRARIES})
     endif()
 
     if (GGML_CPU_HBM)
@@ -101,9 +110,20 @@ set_and_check(GGML_INCLUDE_DIR "@PACKAGE_GGML_INCLUDE_INSTALL_DIR@")
 set_and_check(GGML_LIB_DIR "@PACKAGE_GGML_LIB_INSTALL_DIR@")
 #set_and_check(GGML_BIN_DIR "@PACKAGE_GGML_BIN_INSTALL_DIR@")
 
+if (NOT GGML_SHARED_LIB AND GGML_CPU_KLEIDIAI)
+    unset(KLEIDIAI_LIBRARY CACHE)
+    unset(KLEIDIAI_LIBRARY)
+    find_library(KLEIDIAI_LIBRARY kleidiai
+        REQUIRED
+        HINTS ${GGML_LIB_DIR}
+        NO_CMAKE_FIND_ROOT_PATH)
+    list(APPEND GGML_CPU_INTERFACE_LINK_LIBRARIES ${KLEIDIAI_LIBRARY})
+endif()
+
 if(NOT TARGET ggml::ggml)
     find_package(Threads REQUIRED)
 
+    unset(GGML_LIBRARY CACHE)
     find_library(GGML_LIBRARY ggml
         REQUIRED
         HINTS ${GGML_LIB_DIR}
@@ -112,8 +132,10 @@ if(NOT TARGET ggml::ggml)
     add_library(ggml::ggml UNKNOWN IMPORTED)
     set_target_properties(ggml::ggml
         PROPERTIES
-            IMPORTED_LOCATION "${GGML_LIBRARY}")
+            IMPORTED_LOCATION "${GGML_LIBRARY}"
+            INTERFACE_INCLUDE_DIRECTORIES "${GGML_INCLUDE_DIR}")
 
+    unset(GGML_BASE_LIBRARY CACHE)
     find_library(GGML_BASE_LIBRARY ggml-base
         REQUIRED
         HINTS ${GGML_LIB_DIR}
@@ -122,14 +144,17 @@ if(NOT TARGET ggml::ggml)
     add_library(ggml::ggml-base UNKNOWN IMPORTED)
     set_target_properties(ggml::ggml-base
         PROPERTIES
-            IMPORTED_LOCATION "${GGML_BASE_LIBRARY}")
+            IMPORTED_LOCATION "${GGML_BASE_LIBRARY}"
+            INTERFACE_INCLUDE_DIRECTORIES "${GGML_INCLUDE_DIR}"
+            INTERFACE_LINK_LIBRARIES "${GGML_BASE_INTERFACE_LINK_LIBRARIES}")
 
     set(_ggml_all_targets "")
     if (NOT GGML_BACKEND_DL)
         foreach(_ggml_backend ${GGML_AVAILABLE_BACKENDS})
             string(REPLACE "-" "_" _ggml_backend_pfx "${_ggml_backend}")
             string(TOUPPER "${_ggml_backend_pfx}" _ggml_backend_pfx)
 
+            unset(${_ggml_backend_pfx}_LIBRARY CACHE)
             find_library(${_ggml_backend_pfx}_LIBRARY ${_ggml_backend}
                 REQUIRED
                 HINTS ${GGML_LIB_DIR}

diff --git a/ggml/include/ggml-alloc.h b/ggml/include/ggml-alloc.h
@@ -75,8 +75,10 @@ GGML_API size_t ggml_gallocr_get_buffer_size(ggml_gallocr_t galloc, int buffer_i
 
 // Utils
 // Create a buffer and allocate all the tensors in a ggml_context
-// ggml_backend_alloc_ctx_tensors_from_buft_size returns the size of the buffer that would be allocated by ggml_backend_alloc_ctx_tensors_from_buft
+
+// returns the size of the buffer that would be allocated by ggml_backend_alloc_ctx_tensors_from_buft. returns 0 on failure
 GGML_API size_t                       ggml_backend_alloc_ctx_tensors_from_buft_size(struct ggml_context * ctx, ggml_backend_buffer_type_t buft);
+// returns NULL on failure or if all tensors in ctx are already allocated or zero-sized
 GGML_API struct ggml_backend_buffer * ggml_backend_alloc_ctx_tensors_from_buft(struct ggml_context * ctx, ggml_backend_buffer_type_t buft);
 GGML_API struct ggml_backend_buffer * ggml_backend_alloc_ctx_tensors(struct ggml_context * ctx, ggml_backend_t backend);