acinclude: Don't set AVX512-related configuration via CFLAGS.

The correct way to pass configuration options is to define them
inside the config.h.  Additionally, few long lines wrapped and
fixed the unnecessary double check for -mavx512f.

Fixes: abb807e27d ("dpif-netdev: Add command to switch dpif implementation.")
Fixes: 5324b54e60 ("dpif-netdev: Add configure to enable autovalidator at build time.")
Fixes: e90e115a01 ("dpif-netdev: implement subtable lookup validation.")
Fixes: 352b6c7116 ("dpif-lookup: add avx512 gather implementation.")
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Acked-by: Cian Ferriter <cian.ferriter@intel.com>

acinclude.m4

@@ -19,13 +19,16 @@ dnl This enables automatically running all unit tests with all MFEX
 dnl implementations.
 AC_DEFUN([OVS_CHECK_MFEX_AUTOVALIDATOR], [
   AC_ARG_ENABLE([mfex-default-autovalidator],
-                [AC_HELP_STRING([--enable-mfex-default-autovalidator], [Enable MFEX autovalidator as default miniflow_extract implementation.])],
+                [AC_HELP_STRING([--enable-mfex-default-autovalidator],
+                                [Enable MFEX autovalidator as default
+                                 miniflow_extract implementation.])],
                 [autovalidator=yes],[autovalidator=no])
   AC_MSG_CHECKING([whether MFEX Autovalidator is default implementation])
   if test "$autovalidator" != yes; then
     AC_MSG_RESULT([no])
   else
-    OVS_CFLAGS="$OVS_CFLAGS -DMFEX_AUTOVALIDATOR_DEFAULT"
+    AC_DEFINE([MFEX_AUTOVALIDATOR_DEFAULT], [1],
+              [Autovalidator for miniflow_extract is a default implementation.])
     AC_MSG_RESULT([yes])
   fi
 ])
@@ -35,13 +38,17 @@ dnl This enables automatically running all unit tests with all DPCLS
 dnl implementations.
 AC_DEFUN([OVS_CHECK_DPCLS_AUTOVALIDATOR], [
   AC_ARG_ENABLE([autovalidator],
-                [AC_HELP_STRING([--enable-autovalidator], [Enable DPCLS autovalidator as default subtable search implementation.])],
+                [AC_HELP_STRING([--enable-autovalidator],
+                                [Enable DPCLS autovalidator as default subtable
+                                 search implementation.])],
                 [autovalidator=yes],[autovalidator=no])
   AC_MSG_CHECKING([whether DPCLS Autovalidator is default implementation])
   if test "$autovalidator" != yes; then
     AC_MSG_RESULT([no])
   else
-    OVS_CFLAGS="$OVS_CFLAGS -DDPCLS_AUTOVALIDATOR_DEFAULT"
+    AC_DEFINE([DPCLS_AUTOVALIDATOR_DEFAULT], [1],
+              [Autovalidator for the userspace datapath classifier is a
+               default implementation.])
     AC_MSG_RESULT([yes])
   fi
 ])
@@ -50,17 +57,34 @@ dnl Set OVS DPIF default implementation at configure time for running the unit
 dnl tests on the whole codebase without modifying tests per DPIF impl
 AC_DEFUN([OVS_CHECK_DPIF_AVX512_DEFAULT], [
   AC_ARG_ENABLE([dpif-default-avx512],
-                [AC_HELP_STRING([--enable-dpif-default-avx512], [Enable DPIF AVX512 implementation as default.])],
+                [AC_HELP_STRING([--enable-dpif-default-avx512],
+                                [Enable DPIF AVX512 implementation as default.])],
                 [dpifavx512=yes],[dpifavx512=no])
   AC_MSG_CHECKING([whether DPIF AVX512 is default implementation])
   if test "$dpifavx512" != yes; then
     AC_MSG_RESULT([no])
   else
-    OVS_CFLAGS="$OVS_CFLAGS -DDPIF_AVX512_DEFAULT"
+    AC_DEFINE([DPIF_AVX512_DEFAULT], [1],
+              [DPIF AVX512 is a default implementation of the userspace
+               datapath interface.])
     AC_MSG_RESULT([yes])
   fi
 ])
 
+dnl OVS_CHECK_AVX512
+dnl
+dnl Checks if compiler and binutils supports AVX512.
+AC_DEFUN([OVS_CHECK_AVX512], [
+  OVS_CHECK_BINUTILS_AVX512
+  OVS_CHECK_CC_OPTION(
+    [-mavx512f], [ovs_have_cc_mavx512f=yes], [ovs_have_cc_mavx512f=no])
+  AM_CONDITIONAL([HAVE_AVX512F], [test $ovs_have_cc_mavx512f = yes])
+  if test "$ovs_have_cc_mavx512f" = yes; then
+    AC_DEFINE([HAVE_AVX512F], [1],
+              [Define to 1 if compiler supports AVX512.])
+  fi
+])
+
 dnl OVS_ENABLE_WERROR
 AC_DEFUN([OVS_ENABLE_WERROR],
   [AC_ARG_ENABLE(

configure.ac

@@ -179,15 +179,13 @@ OVS_ENABLE_OPTION([-Wno-null-pointer-arithmetic])
 OVS_ENABLE_OPTION([-Warray-bounds-pointer-arithmetic])
 OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
 OVS_CONDITIONAL_CC_OPTION([-Wno-unused-parameter], [HAVE_WNO_UNUSED_PARAMETER])
-OVS_CONDITIONAL_CC_OPTION([-mavx512f], [HAVE_AVX512F])
-OVS_CHECK_CC_OPTION([-mavx512f], [CFLAGS="$CFLAGS -DHAVE_AVX512F"])
 OVS_ENABLE_WERROR
 OVS_ENABLE_SPARSE
 OVS_CTAGS_IDENTIFIERS
 OVS_CHECK_DPCLS_AUTOVALIDATOR
 OVS_CHECK_DPIF_AVX512_DEFAULT
 OVS_CHECK_MFEX_AUTOVALIDATOR
-OVS_CHECK_BINUTILS_AVX512
+OVS_CHECK_AVX512
 
 AC_ARG_VAR(KARCH, [Kernel Architecture String])
 AC_SUBST(KARCH)

m4/openvswitch.m4

@@ -412,7 +412,6 @@ AC_DEFUN([OVS_CHECK_BINUTILS_AVX512],
      if ($CC -dumpmachine | grep x86_64) >/dev/null 2>&1; then
        if (objdump -d  --no-show-raw-insn $OBJFILE | grep -q $GATHER_PARAMS) >/dev/null 2>&1; then
          ovs_cv_binutils_avx512_good=yes
-         CFLAGS="$CFLAGS -DHAVE_LD_AVX512_GOOD"
        else
          ovs_cv_binutils_avx512_good=no
          dnl Explicitly disallow avx512f to stop compiler auto-vectorizing
@@ -424,6 +423,10 @@ AC_DEFUN([OVS_CHECK_BINUTILS_AVX512],
        ovs_cv_binutils_avx512_good=no
      fi])
      rm $OBJFILE
+   if test "$ovs_cv_binutils_avx512_good" = yes; then
+     AC_DEFINE([HAVE_LD_AVX512_GOOD], [1],
+               [Define to 1 if binutils correctly supports AVX512.])
+   fi
    AM_CONDITIONAL([HAVE_LD_AVX512_GOOD],
                   [test "$ovs_cv_binutils_avx512_good" = yes])])