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1 files changed, 798 insertions, 0 deletions

diff --git a/llama.cpp/ggml/src/ggml-cpu/kleidiai/kleidiai.cpp b/llama.cpp/ggml/src/ggml-cpu/kleidiai/kleidiai.cpp
new file mode 100644
index 0000000..ad23e73
--- /dev/null
+++ b/llama.cpp/ggml/src/ggml-cpu/kleidiai/kleidiai.cpp
@@ -0,0 +1,798 @@
+// SPDX-FileCopyrightText: Copyright 2025 Arm Limited and/or its affiliates <open-source-office@arm.com>
+// SPDX-License-Identifier: MIT
+//
+#include <arm_neon.h>
+#include <assert.h>
+#include <atomic>
+#include <cfloat>
+#include <cmath>
+#include <algorithm>
+#include <stdexcept>
+#include <stdint.h>
+#include <string.h>
+#include <string>
+#include <vector>
+#if defined(__linux__)
+#include <asm/hwcap.h>
+#include <sys/auxv.h>
+#elif defined(__APPLE__)
+#include <string_view>
+#include <sys/sysctl.h>
+#include <sys/types.h>
+#elif defined(_WIN32)
+#include <windows.h>
+#include <excpt.h>
+#endif
+
+#include "kleidiai.h"
+
+#include "ggml-cpu.h"
+#include "ggml-impl.h"
+#include "ggml-backend-impl.h"
+#include "ggml-threading.h"
+#include "traits.h"
+
+#include "kernels.h"
+
+#include "kai_common.h"
+
+#define GGML_COMMON_DECL_CPP
+#include "ggml-common.h"
+
+struct ggml_kleidiai_context {
+    cpu_feature features;
+    ggml_kleidiai_kernels * kernels_q4;
+    ggml_kleidiai_kernels * kernels_q8;
+} static ctx = { CPU_FEATURE_NONE, NULL, NULL };
+
+static const char* cpu_feature_to_string(cpu_feature f) {
+    if (f == CPU_FEATURE_NONE) {
+        return "NONE";
+    } else if ((f & CPU_FEATURE_SME) == CPU_FEATURE_SME) {
+        return "SME";
+    } else if ((f & CPU_FEATURE_SVE) == CPU_FEATURE_SVE) {
+        return "SVE";
+    }
+    else if ((f & CPU_FEATURE_I8MM) == CPU_FEATURE_I8MM) {
+        return "I8MM";
+    } else if ((f & CPU_FEATURE_DOTPROD) == CPU_FEATURE_DOTPROD) {
+        return "DOTPROD";
+    }
+    else {
+        return "UNKNOWN";
+    }
+}
+
+static void init_kleidiai_context(void) {
+
+    ggml_critical_section_start();
+    static bool initialized = false;
+
+    if (!initialized) {
+        initialized = true;
+        const char *env_var = getenv("GGML_KLEIDIAI_SME");
+        int sme_enabled = 0;
+
+        ctx.features  = (ggml_cpu_has_dotprod()     ? CPU_FEATURE_DOTPROD : CPU_FEATURE_NONE) |
+                        (ggml_cpu_has_matmul_int8() ? CPU_FEATURE_I8MM    : CPU_FEATURE_NONE) |
+                        ((ggml_cpu_has_sve() && ggml_cpu_get_sve_cnt() == QK8_0) ? CPU_FEATURE_SVE : CPU_FEATURE_NONE);
+
+        if (env_var) {
+            sme_enabled = atoi(env_var);
+        }
+
+        if (sme_enabled != 0) {
+            ctx.features |= ggml_cpu_has_sme() ? CPU_FEATURE_SME : CPU_FEATURE_NONE;
+        }
+        ctx.kernels_q4 = ggml_kleidiai_select_kernels_q4_0(ctx.features);
+        ctx.kernels_q8 = ggml_kleidiai_select_kernels_q8_0(ctx.features);
+#ifndef NDEBUG
+        if (ctx.kernels_q4) {
+            GGML_LOG_DEBUG("kleidiai: using q4 kernel with CPU feature %s\n", cpu_feature_to_string(ctx.kernels_q4->required_cpu));
+        }
+        if (ctx.kernels_q8) {
+            GGML_LOG_DEBUG("kleidiai: using q8 kernel with CPU feature %s\n", cpu_feature_to_string(ctx.kernels_q8->required_cpu));
+        }
+#endif
+    }
+    ggml_critical_section_end();
+}
+
+static inline int64_t ggml_ne(const ggml_tensor * tensor, int dim) {
+    GGML_ASSERT(dim >= 0 && dim < GGML_MAX_DIMS);
+    return tensor->ne[dim];
+}
+
+namespace ggml::cpu::kleidiai {
+
+static size_t round_down(size_t x, size_t y) {
+    return y == 0 ? x : x - (x % y);
+}
+
+static void transpose_f32kxn_f16nxk(size_t n, size_t k, float * dst, const uint16_t * src, size_t rhs_stride) {
+    size_t src_stride = rhs_stride / sizeof(uint16_t);
+    size_t dst_stride = n;
+
+    for (size_t k_idx = 0; k_idx < k; ++k_idx) {
+        for (size_t n_idx = 0; n_idx < n; ++n_idx) {
+            uint16_t v = *(src + k_idx + n_idx * src_stride);
+            *(dst + n_idx + k_idx * dst_stride) = kai_cast_f32_f16(v);
+        }
+    }
+}
+
+class tensor_traits : public ggml::cpu::tensor_traits {
+    bool work_size(int /* n_threads */, const struct ggml_tensor * op, size_t & size) override {
+        if (op->op != GGML_OP_MUL_MAT) {
+            return false;
+        }
+        ggml_kleidiai_kernels *kernels = ggml_kleidiai_select_kernels(ctx.features, op);
+        if (!kernels) {
+            return false;
+        }
+        bool is_gemv = op->src[1]->ne[1] == 1;
+        kernel_info * kernel = is_gemv ? &kernels->gemv : &kernels->gemm;
+        lhs_packing_info * lhs_info = is_gemv ? &kernels->gemv_lhs_info : &kernels->gemm_lhs_info;
+
+        size_t k = op->src[0]->ne[0];
+        size_t n = op->src[0]->ne[1];
+        size_t m = op->src[1]->ne[1];
+
+        size_t mr = kernel->get_mr();
+        size_t kr = kernel->get_kr();
+        size_t sr = kernel->get_sr();
+
+        if (kernels->rhs_type == GGML_TYPE_Q4_0) {
+            if (!lhs_info->packed_size_ex) return false;
+            size = lhs_info->packed_size_ex(m, k, QK4_0, mr, kr, sr);
+        } else if (kernels->rhs_type == GGML_TYPE_Q8_0) {
+            if (!lhs_info->packed_size_ex) return false;
+            size = lhs_info->packed_size_ex(m, k, QK8_0, mr, kr, sr);
+        } else if (kernels->rhs_type == GGML_TYPE_F16) {
+            if (!lhs_info->packed_size_ex || !kernels->rhs_info.packed_size_ex) return false;
+            const int64_t lhs_batch_size0 = op->src[1]->ne[2];
+            const int64_t rhs_batch_size0 = op->src[0]->ne[2];
+            const int64_t r = lhs_batch_size0 / rhs_batch_size0;
+            size = lhs_info->packed_size_ex(m * r, k, 0, mr, kr, sr) +
+                   kernels->rhs_info.packed_size_ex(n, k, kernel->get_nr(), kernel->get_kr(), 0) +
+                   k * n * sizeof(float) + n * sizeof(float);
+        } else {
+            return false;
+        }
+
+        return true;
+    }
+
+    bool compute_forward(struct ggml_compute_params * params, struct ggml_tensor * dst) override {
+        if (dst->op == GGML_OP_MUL_MAT) {
+            if (dst->src[0]->type == GGML_TYPE_Q4_0) {
+                return compute_forward_q4_0(params, dst);
+            } else if (dst->src[0]->type == GGML_TYPE_Q8_0) {
+                return compute_forward_q8_0(params, dst);
+            } else if (dst->src[0]->type == GGML_TYPE_F16) {
+                return compute_forward_fp16(params, dst);
+            }
+        } else if (dst->op == GGML_OP_GET_ROWS) {
+            if (dst->src[0]->type == GGML_TYPE_Q4_0 || dst->src[0]->type == GGML_TYPE_Q8_0) {
+                return compute_forward_get_rows(params, dst);
+            }
+        }
+        return false;
+    }
+
+    bool compute_forward_fp16(ggml_compute_params * params, struct ggml_tensor * dst) {
+        const ggml_tensor * src0 = dst->src[0];
+        const ggml_tensor * src1 = dst->src[1];
+
+        GGML_TENSOR_BINARY_OP_LOCALS
+
+        ggml_kleidiai_kernels *kernels = ggml_kleidiai_select_kernels(ctx.features, dst);
+        if (!kernels) {
+            return false;
+        }
+
+        const bool is_gemv = src1->ne[1] == 1;
+        kernel_info * kernel = is_gemv ? &kernels->gemv : &kernels->gemm;
+        lhs_packing_info * lhs_info = is_gemv ? &kernels->gemv_lhs_info : &kernels->gemm_lhs_info;
+        GGML_ASSERT(kernel);
+        if (!kernels->rhs_info.pack_func_ex ||
+            !kernel->get_lhs_offset_ex || !kernel->get_rhs_packed_offset_ex || !kernel->run_kernel_ex) {
+            return false;
+        }
+
+        const int nth = params->nth;
+        const int ith = params->ith;
+
+        const int64_t lhs_batch_size0 = ne12;
+        const int64_t rhs_batch_size0 = ne02;
+        const int64_t batch_size      = lhs_batch_size0;
+
+        GGML_ASSERT(rhs_batch_size0 > 0);
+        GGML_ASSERT(lhs_batch_size0 % rhs_batch_size0 == 0);
+        const int64_t r = lhs_batch_size0 / rhs_batch_size0;
+
+        const int64_t m_group = ne11;
+        const int64_t m       = m_group;
+        const int64_t n       = ne01;
+        const int64_t k       = ne00;
+
+        const size_t lhs_stride = src1->nb[1];
+        const size_t rhs_stride = src0->nb[1];
+        const size_t dst_stride = dst->nb[1];
+
+        const int64_t mr = (int64_t) kernel->get_mr();
+        const int64_t nr = (int64_t) kernel->get_nr();
+        const int64_t kr = (int64_t) kernel->get_kr();
+        const int64_t sr = (int64_t) kernel->get_sr();
+
+        const size_t lhs_packed_size = lhs_info->packed_size_ex(m, k, 0, mr, kr, sr);
+        const size_t rhs_packed_size = kernels->rhs_info.packed_size_ex(n, k, nr, kr, 0);
+        const size_t kxn_size        = k * n * sizeof(float);
+        const size_t bias_size       = n * sizeof(float);
+
+        const size_t wsize_required = lhs_packed_size + rhs_packed_size + kxn_size + bias_size;
+        GGML_ASSERT(wsize_required <= params->wsize);
+
+        uint8_t * lhs_packed = static_cast<uint8_t *>(params->wdata);
+        uint8_t * rhs_packed = lhs_packed + lhs_packed_size;
+        uint8_t * rhs_kxn    = rhs_packed + rhs_packed_size;
+        uint8_t * bias       = rhs_kxn + kxn_size;
+
+        for (int64_t batch_idx = 0; batch_idx < batch_size; ++batch_idx) {
+            const int64_t rhs_batch_idx = batch_idx / r;
+            const uint8_t * rhs_batch_base = static_cast<const uint8_t *>(src0->data) + rhs_batch_idx * src0->nb[2];
+            uint8_t * dst_batch_base = static_cast<uint8_t *>(dst->data) + batch_idx * dst->nb[2];
+
+            // LHS packing (threaded over m, honoring mr alignment and KV groups)
+            {
+                const int64_t m_roundup_mr = kai_roundup(m, mr);
+                const int64_t num_threads  = KAI_MIN(m_roundup_mr / mr, nth);
+
+                if (ith < num_threads) {
+                    const int64_t num_m_per_thread0   = round_down((size_t)(m_roundup_mr / num_threads), (size_t)mr);
+                    const int64_t num_m_per_threadN_1 = m - (num_threads - 1) * num_m_per_thread0;
+
+                    const int64_t m_start = ith * num_m_per_thread0;
+                    const int64_t m_count = (ith == num_threads - 1) ? num_m_per_threadN_1 : num_m_per_thread0;
+
+                    // Base packed offset (aligned) and per-row stride in bytes
+                    const size_t base_packed_off  = lhs_info->get_packed_offset_ex(m_start, k, 0, mr, kr, sr);
+                    const size_t next_block_off   = lhs_info->get_packed_offset_ex(m_start + mr, k, 0, mr, kr, sr);
+                    const size_t row_stride_bytes = (next_block_off - base_packed_off) / (size_t)mr;
+
+                    int64_t remaining = m_count;
+                    int64_t cur       = m_start;
+
+                    while (remaining > 0) {
+                        const int64_t row_in_group = cur;
+                        const int64_t avail        = m_group - row_in_group;
+                        const int64_t take         = std::min(avail, remaining);
+
+                        const uint8_t * lhs_batch_base = static_cast<const uint8_t *>(src1->data) + batch_idx * src1->nb[2];
+                        const void * src_ptr = lhs_batch_base + (size_t)row_in_group * lhs_stride;
+                        const size_t dst_off = base_packed_off + (size_t)(cur - m_start) * row_stride_bytes;
+                        void * dst_ptr       = lhs_packed + dst_off;
+
+                        lhs_info->pack_func_ex(take, k, 0, mr, kr, sr, 0, src_ptr, lhs_stride, dst_ptr);
+
+                        cur       += take;
+                        remaining -= take;
+                    }
+                }
+            }
+
+            // RHS packing (single thread), then synchronize
+            if (ith == 0) {
+                memset(bias, 0, (size_t)n * sizeof(float));
+                transpose_f32kxn_f16nxk((size_t)n, (size_t)k,
+                                        reinterpret_cast<float *>(rhs_kxn),
+                                        reinterpret_cast<const uint16_t *>(rhs_batch_base),
+                                        rhs_stride);
+
+                kernels->rhs_info.pack_func_ex(1, n, k, nr, kr, sr, 0, n * sizeof(float),
+                             rhs_kxn, bias, nullptr, rhs_packed, 0, nullptr);
+            }
+
+            ggml_barrier(params->threadpool);
+
+            // Matmul (threaded over n)
+            {
+                const int64_t n_step  = (int64_t) kernel->get_n_step();
+                int64_t num_threads_n = KAI_MIN(n / n_step, nth);
+                if (num_threads_n <= 0) {
+                    num_threads_n = 1;
+                }
+
+                if (ith < num_threads_n) {
+                    const int64_t num_n_per_thread0   = round_down((size_t)(n / num_threads_n), (size_t)n_step);
+                    const int64_t num_n_per_threadN_1 = n - (num_threads_n - 1) * num_n_per_thread0;
+
+                    const int64_t n_start      = ith * num_n_per_thread0;
+                    const int64_t n_to_process = (ith == num_threads_n - 1) ? num_n_per_threadN_1 : num_n_per_thread0;
+
+                    // LHS packed base at row 0 (consistent with packing above)
+                    const size_t lhs_packed_offset0 = lhs_info->get_packed_offset_ex(0, k, 0, mr, kr, sr);
+                    const size_t rhs_packed_offset  = kernel->get_rhs_packed_offset_ex(n_start, k, 0);
+                    const size_t dst_offset         = kernel->get_dst_offset((size_t)0, (size_t)n_start, dst_stride);
+
+                    const void * lhs_ptr = lhs_packed + lhs_packed_offset0;
+                    const void * rhs_ptr = rhs_packed + rhs_packed_offset;
+                    float * dst_ptr      = reinterpret_cast<float *>(dst_batch_base + dst_offset);
+
+                    kernel->run_kernel_ex(m, n_to_process, k, 0, lhs_ptr, rhs_ptr, dst_ptr, dst_stride, sizeof(float), -FLT_MAX, FLT_MAX);
+                }
+            }
+
+            if (batch_idx != batch_size - 1) {
+                ggml_barrier(params->threadpool);
+            }
+        }
+
+        return true;
+    }
+
+    bool compute_forward_q4_0(struct ggml_compute_params * params, struct ggml_tensor * dst) {
+        GGML_ASSERT(dst->src[0]->type == GGML_TYPE_Q4_0);
+
+        const ggml_tensor * src0 = dst->src[0];
+        const ggml_tensor * src1 = dst->src[1];
+
+        GGML_TENSOR_BINARY_OP_LOCALS
+
+        ggml_kleidiai_kernels *kernels = ggml_kleidiai_select_kernels(ctx.features, dst);
+        if (!kernels) {
+            return false;
+        }
+
+        bool is_gemv = src1->ne[1] == 1;
+        kernel_info * kernel = is_gemv ? &kernels->gemv : &kernels->gemm;
+        lhs_packing_info * lhs_info = is_gemv ? &kernels->gemv_lhs_info : &kernels->gemm_lhs_info;
+
+        GGML_ASSERT(kernel);
+        if (!lhs_info->get_packed_offset_ex || !lhs_info->pack_func_ex ||
+            !kernel->get_rhs_packed_offset_ex || !kernel->run_kernel_ex || !kernel->get_dst_offset) {
+            return false;
+        }
+
+        const int ith = params->ith;
+        const int nth_raw = params->nth;
+        const int nth = nth_raw > 0 ? nth_raw : 1;
+
+        const size_t k = ne00;
+        const size_t m = ne11;
+        const size_t n = ne01;
+
+        size_t mr = kernel->get_mr();
+        size_t kr = kernel->get_kr();
+        size_t sr = kernel->get_sr();
+
+        const uint8_t * lhs        = static_cast<const uint8_t *>(src1->data);
+        uint8_t * lhs_packed       = (uint8_t*)params->wdata;
+        const uint8_t * rhs_packed = static_cast<const uint8_t *>(src0->data);
+
+        const size_t n_step = kernel->get_n_step();
+        const size_t num_n_per_thread = kai_roundup(kai_roundup(n, nth) / nth, n_step);
+        const size_t n_start = ith * num_n_per_thread;
+
+        size_t n_to_process = 0;
+        if (n_start < n) {
+            n_to_process = num_n_per_thread;
+            if ((n_start + n_to_process) > n) {
+                n_to_process = n - n_start;
+            }
+        }
+
+        // Calculate number of columns to be processed per thread
+        const size_t num_m_per_thread = kai_roundup(m, mr * nth) / nth;
+        const size_t m_start = ith * num_m_per_thread;
+        size_t m_to_process = num_m_per_thread;
+        if ((m_start + m_to_process) > m) {
+            m_to_process = m - m_start;
+        }
+
+        if (m_start < m) {
+            // Transform LHS
+            const size_t src_stride        = src1->nb[1];
+            const float * src_ptr          = reinterpret_cast<const float *>(lhs + lhs_info->get_offset(m_start, dst->src[1]->nb[1]));
+            const size_t lhs_packed_offset = lhs_info->get_packed_offset_ex(m_start, k, QK4_0, mr, kr, sr);
+            void * lhs_packed_ptr          = static_cast<void *>(lhs_packed + lhs_packed_offset);
+
+            // Pack this thread's chunk with m_idx_start = 0 and per-thread output pointer
+            lhs_info->pack_func_ex(m_to_process, k, QK4_0, mr, kr, sr, 0, src_ptr, src_stride, lhs_packed_ptr);
+        }
+
+        ggml_barrier(params->threadpool);
+
+        // Perform the operation
+        const size_t dst_stride        = dst->nb[1];
+        const size_t lhs_packed_offset = lhs_info->get_packed_offset_ex(0, k, QK4_0, mr, kr, sr);
+        const size_t rhs_packed_offset = kernel->get_rhs_packed_offset_ex(n_start, k, QK4_0);
+        const size_t dst_offset        = kernel->get_dst_offset(0, n_start, dst_stride);
+        const void * rhs_ptr           = static_cast<const void *>(rhs_packed + rhs_packed_offset);
+        const void* lhs_ptr            = (const void*)((const char *)lhs_packed + lhs_packed_offset);
+        float *dst_ptr                 = reinterpret_cast<float *>(static_cast<uint8_t *>(dst->data) + dst_offset);
+
+        if (n_to_process > 0) {
+            kernel->run_kernel_ex(m, n_to_process, k, QK4_0, lhs_ptr, rhs_ptr, dst_ptr, dst_stride,
+                               sizeof(float), -FLT_MAX, FLT_MAX);
+        }
+
+        return true;
+    }
+
+    bool compute_forward_q8_0(struct ggml_compute_params * params, struct ggml_tensor * dst) {
+        GGML_ASSERT(dst->src[0]->type == GGML_TYPE_Q8_0);
+
+        const ggml_tensor * src0 = dst->src[0];
+        const ggml_tensor * src1 = dst->src[1];
+
+        GGML_TENSOR_BINARY_OP_LOCALS
+
+        ggml_kleidiai_kernels *kernels = ggml_kleidiai_select_kernels(ctx.features, dst);
+        if (!kernels) {
+            return false;
+        }
+
+        bool is_gemv = src1->ne[1] == 1;
+        kernel_info * kernel = is_gemv ? &kernels->gemv : &kernels->gemm;
+        lhs_packing_info * lhs_info = is_gemv ? &kernels->gemv_lhs_info : &kernels->gemm_lhs_info;
+
+        if (!kernel || !lhs_info->get_packed_offset_ex || !lhs_info->pack_func_ex ||
+            !kernel->get_rhs_packed_offset_ex || !kernel->run_kernel_ex || !kernel->get_dst_offset) {
+            return false;
+        }
+
+        const int ith = params->ith;
+        const int nth_raw = params->nth;
+        const int nth = nth_raw > 0 ? nth_raw : 1;
+
+        const size_t k = ne00;
+        const size_t m = ne11;
+        const size_t n = ne01;
+
+        size_t mr = kernel->get_mr();
+        size_t kr = kernel->get_kr();
+        size_t sr = kernel->get_sr();
+
+        const uint8_t * lhs        = static_cast<const uint8_t *>(src1->data);
+        uint8_t * lhs_packed       = static_cast<uint8_t *>(params->wdata);
+        const uint8_t * rhs_packed = static_cast<const uint8_t *>(src0->data);
+
+        const size_t n_step = kernel->get_n_step();
+        const size_t num_n_per_thread = kai_roundup(kai_roundup(n, nth) / nth, n_step);
+        const size_t n_start = ith * num_n_per_thread;
+
+        size_t n_to_process = 0;
+        if (n_start < n) {
+            n_to_process = num_n_per_thread;
+            if ((n_start + n_to_process) > n) {
+                n_to_process = n - n_start;
+            }
+        }
+
+        const size_t num_m_per_thread = kai_roundup(m, mr * nth) / nth;
+        const size_t m_start = ith * num_m_per_thread;
+        size_t m_to_process = num_m_per_thread;
+        if ((m_start + m_to_process) > m) {
+            m_to_process = m - m_start;
+        }
+
+        if (m_start < m) {
+            const size_t src_stride        = src1->nb[1];
+            const float * src_ptr          = reinterpret_cast<const float *>(lhs + lhs_info->get_offset(m_start, dst->src[1]->nb[1]));
+            const size_t lhs_packed_offset = lhs_info->get_packed_offset_ex(m_start, k, 0, mr, kr, sr);
+            void * lhs_packed_ptr          = static_cast<void *>(lhs_packed + lhs_packed_offset);
+
+            lhs_info->pack_func_ex(m_to_process, k, 0, mr, kr, sr, 0, src_ptr, src_stride, lhs_packed_ptr);
+        }
+
+        ggml_barrier(params->threadpool);
+
+        const size_t dst_stride        = dst->nb[1];
+        const size_t lhs_packed_offset = lhs_info->get_packed_offset_ex(0, k, 0, mr, kr, sr);
+        const size_t rhs_packed_offset = kernel->get_rhs_packed_offset_ex(n_start, k, 0);
+        const size_t dst_offset        = kernel->get_dst_offset(0, n_start, dst_stride);
+        const void * rhs_ptr           = static_cast<const void *>(rhs_packed + rhs_packed_offset);
+        const void * lhs_ptr           = static_cast<const void *>(lhs_packed + lhs_packed_offset);
+        float * dst_ptr                = reinterpret_cast<float *>(static_cast<uint8_t *>(dst->data) + dst_offset);
+
+        if (n_to_process > 0) {
+            kernel->run_kernel_ex(m, n_to_process, k, 0, lhs_ptr, rhs_ptr, dst_ptr, dst_stride,
+                                  sizeof(float), -FLT_MAX, FLT_MAX);
+        }
+
+        return true;
+    }
+
+    bool compute_forward_get_rows(struct ggml_compute_params * params, struct ggml_tensor * dst) {
+        const ggml_tensor * src0 = dst->src[0];
+        const ggml_tensor * src1 = dst->src[1];
+
+        GGML_TENSOR_BINARY_OP_LOCALS
+
+        ggml_kleidiai_kernels * kernels = nullptr;
+        size_t block_len = 0;
+        size_t num_bytes_multiplier = 0;
+
+        if (dst->src[0]->type == GGML_TYPE_Q4_0) {
+            if (!ctx.kernels_q4) {
+                return false;
+            }
+            kernels = ctx.kernels_q4;
+            block_len = QK4_0;
+            num_bytes_multiplier = sizeof(uint16_t);
+        } else if (dst->src[0]->type == GGML_TYPE_Q8_0) {
+            if (!ctx.kernels_q8) {
+                return false;
+            }
+            kernels = ctx.kernels_q8;
+            block_len = QK8_0;
+            num_bytes_multiplier = sizeof(float);
+        } else {
+            return false;
+        }
+
+        rhs_packing_info * rhs_info = &kernels->rhs_info;
+        kernel_info * kernel        = &kernels->gemm;
+        if (!rhs_info->to_float || !kernel->get_nr) {
+            return false;
+        }
+
+        const int64_t nc     = ne00;
+        const int64_t nr     = ggml_nelements(src1);
+
+        const size_t block_rows = kernel->get_nr();
+        const size_t kr         = kernel->get_kr();
+
+        const size_t packed_stride = rhs_info->packed_stride(nc, block_rows, kr, block_len);
+
+        const int ith = params->ith;
+        const int nth = params->nth;
+
+        const int dr = (nr + nth - 1) / nth;
+        const int ir0 = dr * ith;
+        const int ir1 = MIN(ir0 + dr, nr);
+
+        for (int64_t i = ir0; i < ir1; ++i) {
+            GGML_ASSERT(src1->type == GGML_TYPE_I32);
+            int64_t row_idx = ((const int32_t *)src1->data)[i];
+            GGML_ASSERT(row_idx >= 0 && row_idx < src0->ne[1]);
+
+            float *out = (float *)((char *)dst->data + i * nb1);
+            rhs_info->to_float(src0->data, row_idx, nc, out, block_rows, packed_stride, kr, block_len, num_bytes_multiplier);
+        }
+
+        return true;
+    }
+
+public:
+    int repack(struct ggml_tensor * tensor, const void * data, size_t data_size) {
+        const size_t n = tensor->ne[1];
+        const size_t k = tensor->ne[0];
+
+        if (tensor->type == GGML_TYPE_Q4_0) {
+            if (!ctx.kernels_q4) {
+                return -1;
+            }
+            size_t nr = ctx.kernels_q4->gemm.get_nr();
+            size_t kr = ctx.kernels_q4->gemm.get_kr();
+            size_t sr = ctx.kernels_q4->gemm.get_sr();
+
+            struct kai_rhs_pack_qs4cxs1s0_param params;
+            params.lhs_zero_point = 1;
+            params.rhs_zero_point = 8;
+            ctx.kernels_q4->rhs_info.pack_func_ex(1, n, k, nr, kr, sr, QK4_0, 0,
+                                                  static_cast<const uint8_t *>(data),
+                                                  nullptr, nullptr, tensor->data, 0, &params);
+            GGML_UNUSED(data_size);
+            return 0;
+        } else if (tensor->type == GGML_TYPE_Q8_0) {
+            if (!ctx.kernels_q8) {
+                return -1;
+            }
+
+            const size_t row_stride = tensor->nb[1];
+            const size_t k_blocks   = (k + QK8_0 - 1) / QK8_0;
+
+            std::vector<int8_t> qdata(n * k, 0);
+            std::vector<float> scales(n, 0.0f);
+
+            for (size_t row = 0; row < n; ++row) {
+                const auto * row_blocks = reinterpret_cast<const block_q8_0 *>(
+                    static_cast<const uint8_t *>(data) + row * row_stride);
+
+                float max_abs = 0.0f;
+                for (size_t block = 0; block < k_blocks; ++block) {
+                    const block_q8_0 & blk = row_blocks[block];
+                    const float d = GGML_FP16_TO_FP32(blk.d);
+                    for (size_t l = 0; l < QK8_0; ++l) {
+                        const size_t linear_idx = block * QK8_0 + l;
+                        if (linear_idx >= k) {
+                            break;
+                        }
+                        const float value = d * blk.qs[l];
+                        max_abs = std::max(max_abs, std::fabs(value));
+                    }
+                }
+
+                float scale = max_abs > 0.0f ? max_abs / 127.0f : 0.0f;
+                scales[row] = scale;
+                const float inv_scale = scale > 0.0f ? 1.0f / scale : 0.0f;
+
+                for (size_t block = 0; block < k_blocks; ++block) {
+                    const block_q8_0 & blk = row_blocks[block];
+                    const float d = GGML_FP16_TO_FP32(blk.d);
+                    for (size_t l = 0; l < QK8_0; ++l) {
+                        const size_t linear_idx = block * QK8_0 + l;
+                        if (linear_idx >= k) {
+                            break;
+                        }
+                        const float value = d * blk.qs[l];
+                        int32_t q = scale > 0.0f ? static_cast<int32_t>(std::lround(value * inv_scale)) : 0;
+                        q = std::clamp(q, -127, 127);
+                        qdata[row * k + linear_idx] = static_cast<int8_t>(q);
+                    }
+                }
+            }
+
+            size_t nr = ctx.kernels_q8->gemm.get_nr();
+            size_t kr = ctx.kernels_q8->gemm.get_kr();
+            size_t sr = ctx.kernels_q8->gemm.get_sr();
+
+            struct kai_rhs_pack_qsi8cx_params params;
+            params.lhs_zero_point = 1;
+            params.scale_multiplier = 1.0f;
+
+            ctx.kernels_q8->rhs_info.pack_func_ex(1, n, k, nr, kr, sr, 0, 0,
+                                                  qdata.data(), nullptr, scales.data(),
+                                                  tensor->data, 0, &params);
+            GGML_UNUSED(data_size);
+            return 0;
+        }
+
+        GGML_UNUSED(data_size);
+        return -1;
+    }
+};
+
+static ggml::cpu::tensor_traits * get_tensor_traits(ggml_backend_buffer_t, struct ggml_tensor *) {
+    static tensor_traits traits;
+    return &traits;
+}
+}  // namespace ggml::cpu::kleidiai
+
+static enum ggml_status ggml_backend_cpu_kleidiai_buffer_init_tensor(ggml_backend_buffer_t buffer, struct ggml_tensor * tensor) {
+    tensor->extra = (void *) ggml::cpu::kleidiai::get_tensor_traits(buffer, tensor);
+
+    return GGML_STATUS_SUCCESS;
+    GGML_UNUSED(buffer);
+}
+
+static void ggml_backend_cpu_kleidiai_buffer_set_tensor(ggml_backend_buffer_t buffer, struct ggml_tensor * tensor,
+                                                       const void * data, size_t offset, size_t size) {
+    GGML_ASSERT(offset == 0);
+    GGML_ASSERT(size == ggml_nbytes(tensor));
+
+    auto tensor_traits = (ggml::cpu::kleidiai::tensor_traits *) tensor->extra;
+    auto OK            = tensor_traits->repack(tensor, data, size);
+
+    GGML_ASSERT(OK == 0);
+    GGML_UNUSED(buffer);
+}
+
+static const char * ggml_backend_cpu_kleidiai_buffer_type_get_name(ggml_backend_buffer_type_t buft) {
+    return "CPU_KLEIDIAI";
+
+    GGML_UNUSED(buft);
+}
+
+static ggml_backend_buffer_t ggml_backend_cpu_kleidiai_buffer_type_alloc_buffer(ggml_backend_buffer_type_t buft, size_t size) {
+    ggml_backend_buffer_t buffer = ggml_backend_buft_alloc_buffer(ggml_backend_cpu_buffer_type(), size);
+
+    if (buffer == nullptr) {
+        return nullptr;
+    }
+
+    buffer->buft              = buft;
+    buffer->iface.init_tensor = ggml_backend_cpu_kleidiai_buffer_init_tensor;
+    buffer->iface.set_tensor  = ggml_backend_cpu_kleidiai_buffer_set_tensor;
+    buffer->iface.get_tensor  = nullptr;
+    buffer->iface.cpy_tensor  = nullptr;
+    return buffer;
+}
+
+static size_t ggml_backend_cpu_kleidiai_buffer_type_get_alignment(ggml_backend_buffer_type_t buft) {
+    return TENSOR_ALIGNMENT;
+
+    GGML_UNUSED(buft);
+}
+
+static size_t ggml_backend_cpu_kleidiai_buffer_type_get_alloc_size(ggml_backend_buffer_type_t buft, const struct ggml_tensor * tensor) {
+    GGML_UNUSED(buft);
+
+    const size_t n = tensor->ne[1];
+    const size_t k = tensor->ne[0];
+
+    ggml_kleidiai_kernels * kernels = nullptr;
+    size_t block_len = 0;
+
+    if (tensor->type == GGML_TYPE_Q4_0) {
+        GGML_ASSERT(ctx.kernels_q4);
+        kernels = ctx.kernels_q4;
+        block_len = QK4_0;
+    } else if (tensor->type == GGML_TYPE_Q8_0) {
+        GGML_ASSERT(ctx.kernels_q8);
+        kernels = ctx.kernels_q8;
+        block_len = QK8_0;
+    } else {
+        return 0;
+    }
+
+    const size_t nr = kernels->gemm.get_nr();
+    const size_t kr = kernels->gemm.get_kr();
+    const size_t packed = kernels->rhs_info.packed_size_ex(n, k, nr, kr, block_len);
+    const size_t raw     = ggml_nbytes(tensor);
+
+    return packed > raw ? packed : raw;
+}
+
+namespace ggml::cpu::kleidiai {
+class extra_buffer_type : ggml::cpu::extra_buffer_type {
+    bool supports_op(ggml_backend_dev_t, const struct ggml_tensor * op) override {
+        if ((op->op == GGML_OP_MUL_MAT || op->op == GGML_OP_GET_ROWS) &&
+            (op->src[0]->type == GGML_TYPE_Q4_0 || op->src[0]->type == GGML_TYPE_Q8_0) &&
+            op->src[0]->buffer &&
+            (ggml_n_dims(op->src[0]) == 2) &&
+            op->src[0]->buffer->buft == ggml_backend_cpu_kleidiai_buffer_type()) {
+            if (((op->src[0]->type == GGML_TYPE_Q4_0) ? ctx.kernels_q4 : ctx.kernels_q8) == nullptr) {
+                return false;
+            }
+            if (op->src[1]->buffer && !ggml_backend_buft_is_host(op->src[1]->buffer->buft)) {
+                return false;
+            }
+            if ((op->src[1]->type == GGML_TYPE_F32 || op->src[1]->type == GGML_TYPE_I32) &&
+                ggml_ne(op->src[1], 2) == 1 && ggml_ne(op->src[1], 3) == 1) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    ggml::cpu::tensor_traits * get_tensor_traits(const struct ggml_tensor * op) override {
+        if (op->op == GGML_OP_MUL_MAT || op->op == GGML_OP_GET_ROWS) {
+            if (op->src[0]->buffer && op->src[0]->buffer->buft == ggml_backend_cpu_kleidiai_buffer_type()) {
+                return (ggml::cpu::tensor_traits *) op->src[0]->extra;
+            }
+            else if (ggml_kleidiai_select_kernels(ctx.features, op) && op->src[1]->ne[1] > 1) {
+                if ((op->src[0]->nb[1] * op->src[0]->ne[1] != op->src[0]->nb[2]) ||
+                    (op->src[1]->nb[1] * op->src[1]->ne[1] != op->src[1]->nb[2])) {
+                    return nullptr;
+                }
+
+                return ggml::cpu::kleidiai::get_tensor_traits(NULL, NULL);
+            }
+        }
+        return nullptr;
+    }
+};
+}  // namespace ggml::cpu::kleidiai
+
+ggml_backend_buffer_type_t ggml_backend_cpu_kleidiai_buffer_type(void) {
+    static ggml::cpu::kleidiai::extra_buffer_type ctx;
+    static struct ggml_backend_buffer_type ggml_backend_cpu_buffer_type_kleidiai = {
+        /* .iface    = */ {
+                           /* .get_name         = */ ggml_backend_cpu_kleidiai_buffer_type_get_name,
+                           /* .alloc_buffer     = */ ggml_backend_cpu_kleidiai_buffer_type_alloc_buffer,
+                           /* .get_alignment    = */ ggml_backend_cpu_kleidiai_buffer_type_get_alignment,
+                           /* .get_max_size     = */ nullptr,  // defaults to SIZE_MAX
+                           /* .get_alloc_size   = */ ggml_backend_cpu_kleidiai_buffer_type_get_alloc_size,
+                           /* .is_host          = */ nullptr,
+                           },
+        /* .device  = */ ggml_backend_reg_dev_get(ggml_backend_cpu_reg(), 0),
+        /* .context = */ &ctx,
+    };
+
+    init_kleidiai_context();
+
+    return &ggml_backend_cpu_buffer_type_kleidiai;
+}