Add GCRYCTL_DISABLE_HWF

This option is useful to disable detected hardware features. It has
been implemented in benchmark, so that it is now possible to run

  tests/benchmark --disable-hwf intel-aesni  cipher aes aes192 aes256

to compare the use of AES-NI insns to the pure C code.

1 files changed, 11 insertions, 0 deletions

diff --git a/tests/benchmark.c b/tests/benchmark.c
index 536b76a6..cf78c76b 100644
--- a/tests/benchmark.c
+++ b/tests/benchmark.c
@@ -1177,6 +1177,17 @@ main( int argc, char **argv )
               argc--; argv++;
             }
         }
+      else if (!strcmp (*argv, "--disable-hwf"))
+        {
+          argc--; argv++;
+          if (argc)
+            {
+              if (gcry_control (GCRYCTL_DISABLE_HWF, *argv, NULL))
+                fprintf (stderr, PGM ": unknown hardware feature `%s'"
+                         " - option ignored\n", *argv);
+              argc--; argv++;
+            }
+        }
       else if (!strcmp (*argv, "--fips"))
         {
           argc--; argv++;