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-rw-r--r--lib/librte_eal/common/eal_common_cpuflags.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/lib/librte_eal/common/eal_common_cpuflags.c b/lib/librte_eal/common/eal_common_cpuflags.c
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+++ 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);
+ }
+ }
+}