Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_eal / common / eal_common_cpuflags.c

diff --git a/lib/librte_eal/common/eal_common_cpuflags.c b/lib/librte_eal/common/eal_common_cpuflags.c
new file mode 100644 (file)
index 0000000..ecb1240
--- /dev/null
+++ b/lib/librte_eal/common/eal_common_cpuflags.c
@@ -0,0 +1,76 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+
+#include <rte_common.h>
+#include <rte_cpuflags.h>
+
+/**
+ * Checks if the machine is adequate for running the binary. If it is not, the
+ * program exits with status 1.
+ * The function attribute forces this function to be called before main(). But
+ * with ICC, the check is generated by the compiler.
+ */
+#ifndef __INTEL_COMPILER
+void __attribute__ ((__constructor__))
+#else
+void
+#endif
+rte_cpu_check_supported(void)
+{
+       /* This is generated at compile-time by the build system */
+       static const enum rte_cpu_flag_t compile_time_flags[] = {
+                       RTE_COMPILE_TIME_CPUFLAGS
+       };
+       unsigned count = RTE_DIM(compile_time_flags), i;
+       int ret;
+
+       for (i = 0; i < count; i++) {
+               ret = rte_cpu_get_flag_enabled(compile_time_flags[i]);
+
+               if (ret < 0) {
+                       fprintf(stderr,
+                               "ERROR: CPU feature flag lookup failed with error %d\n",
+                               ret);
+                       exit(1);
+               }
+               if (!ret) {
+                       fprintf(stderr,
+                               "ERROR: This system does not support \"%s\".\n"
+                               "Please check that RTE_MACHINE is set correctly.\n",
+                               rte_cpu_get_flag_name(compile_time_flags[i]));
+                       exit(1);
+               }
+       }
+}