Add CPU discovery capabilities.

Resolves: COMPMID-4500

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: I008c51934ef813fb1f489b531288c4419e701955
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5799
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/src/common/cpuinfo/target/CpuInfoSveUtils.cpp b/src/common/cpuinfo/target/CpuInfoSveUtils.cpp
new file mode 100644
index 0000000000..750a1b01d1
--- /dev/null
+++ b/src/common/cpuinfo/target/CpuInfoSveUtils.cpp
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2021 Arm Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "src/common/cpuinfo/target/CpuInfoSveUtils.h"
+
+namespace arm_compute
+{
+namespace cpuinfo
+{
+uint64_t get_sve_feature_reg()
+{
+    uint64_t reg = 0;
+#if defined(ENABLE_SVE)
+    __asm __volatile("MRS %0, ID_AA64ZFR0_EL1"
+                     : "=r"(reg));
+#endif /* defined(DENABLE_SVE) */
+    return reg;
+}
+} // namespace cpuinfo
+} // namespace arm_compute