KleidiAI SVE2p1 halfgemm kernel integrated

cmake/deps.txt

@@ -61,7 +61,7 @@ directx_headers;https://github.com/microsoft/DirectX-Headers/archive/refs/tags/v
 cudnn_frontend;https://github.com/NVIDIA/cudnn-frontend/archive/refs/tags/v1.27.0.zip;1e4c9a464d3437e388ab0163f3be068dba783c08
 dawn;https://github.com/google/dawn/archive/refs/tags/v20260828.013844.zip;83f269a6b0c2a5a085c96a4e360d337950740018
 dawn_agility_sdk;https://www.nuget.org/api/v2/package/Microsoft.Direct3D.D3D12/1.721.3-preview;fa5f5fc8d0c8c209cfbb530be634960d20595841
-kleidiai;https://github.com/ARM-software/kleidiai/archive/refs/tags/v1.20.0.tar.gz;6895e72b3d5cf1173358164cb3d64c9d7d33cc84
+kleidiai;https://github.com/ARM-software/kleidiai/archive/refs/tags/v1.30.0.tar.gz;36aebdd5bd28c40b1943eb93498ae42e703510e5
 # kleidiai-qmx is pinned to a specific commit as there are no tagged releases. When an appropriate tagged release becomes available,
 # this entry will be updated to use refs/tags/<version> instead of the raw commit hash.
 kleidiai-qmx;https://github.com/qualcomm/kleidiai/archive/2f10c9a8d32f81ffeeb6d4885a29cc35d2b0da87.zip;5e855730a2d69057a569f43dd7532db3b2d2a05c

onnxruntime/core/common/cpuid_info.cc

@@ -1,4 +1,5 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
+// SPDX-FileCopyrightText: Copyright 2026 Arm Limited and/or its affiliates <open-source-office@arm.com>
 // Licensed under the MIT License.
 #include "core/common/cpuid_info.h"
 
@@ -41,6 +42,10 @@
 #define HWCAP2_SVEI8MM (1 << 9)
 #endif
 
+#ifndef HWCAP2_SVE2P1
+#define HWCAP2_SVE2P1 (UINT64_C(1) << 36)
+#endif
+
 #ifndef HWCAP2_BF16
 #define HWCAP2_BF16 (1 << 14)
 #endif
@@ -67,6 +72,12 @@
 #define PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE 43
 #endif
 
+// Support querying SVE2.1 when building with Windows SDKs older than 26100.
+// IsProcessorFeaturePresent returns false when the running HAL cannot detect it.
+#ifndef PF_ARM_SVE2_1_INSTRUCTIONS_AVAILABLE
+#define PF_ARM_SVE2_1_INSTRUCTIONS_AVAILABLE 48
+#endif
+
 #endif  // _WIN32
 
 #if defined(__APPLE__)
@@ -190,6 +201,8 @@ void CPUIDInfo::X86Init() {
 #if defined(__linux__)
 
 void CPUIDInfo::ArmLinuxInit() {
+  has_arm_sve2p1_ = ((getauxval(AT_HWCAP2) & HWCAP2_SVE2P1) != 0);
+
   // Assuming no hyper-threading, no NUMA groups
 #if defined(CPUINFO_SUPPORTED)
   if (pytorch_cpuinfo_init_) {
@@ -240,6 +253,8 @@ void CPUIDInfo::ArmLinuxInit() {
 
     has_arm_neon_bf16_ = ((getauxval(AT_HWCAP2) & HWCAP2_BF16) != 0);
   }
+
+  has_arm_sve_ = has_arm_sve_ || has_arm_sve2p1_;
 }
 
 #elif defined(_WIN32)  // ^ defined(__linux__)
@@ -328,6 +343,8 @@ void CPUIDInfo::ArmWindowsInit() {
                       IsProcessorFeaturePresent(PF_ARM_SVE_I8MM_INSTRUCTIONS_AVAILABLE) != 0;
 #endif
 #endif
+  has_arm_sve2p1_ = IsProcessorFeaturePresent(PF_ARM_SVE2_1_INSTRUCTIONS_AVAILABLE) != 0;
+  has_arm_sve_ = has_arm_sve_ || has_arm_sve2p1_;
 }
 
 #elif defined(__APPLE__)  // ^ defined(_WIN32)

onnxruntime/core/common/cpuid_info.h

@@ -1,4 +1,5 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
+// SPDX-FileCopyrightText: Copyright 2026 Arm Limited and/or its affiliates <open-source-office@arm.com>
 // Licensed under the MIT License.
 
 #pragma once
@@ -39,6 +40,7 @@ class CPUIDInfo {
   bool HasArmNeonDot() const { return has_arm_neon_dot_; }
   bool HasArmNeon_I8MM() const { return has_arm_neon_i8mm_; }
   bool HasArmSve() const { return has_arm_sve_; }
+  bool HasArmSVE2p1() const { return has_arm_sve2p1_; }
   bool HasArmSVE_I8MM() const { return has_arm_sve_i8mm_; }
   bool HasArmNeon_BF16() const { return has_arm_neon_bf16_; }
   bool HasArm_SME() const { return has_arm_sme_; }
@@ -169,6 +171,7 @@ class CPUIDInfo {
   bool has_fp16_{false};
   bool has_arm_neon_i8mm_{false};
   bool has_arm_sve_{false};
+  bool has_arm_sve2p1_{false};
   bool has_arm_sve_i8mm_{false};
   bool has_arm_neon_bf16_{false};
   bool has_arm_sme_{false};