commit f3a99b2216114f89b20329ae7664b764248b4bbd
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Mon Dec 6 07:14:12 2021 -0800
 
    x86: Don't set Prefer_No_AVX512 for processors with AVX512 and AVX-VNNI
    
    Don't set Prefer_No_AVX512 on processors with AVX512 and AVX-VNNI since
    they won't lower CPU frequency when ZMM load and store instructions are
    used.
    
    (cherry picked from commit ceeffe968c01b1202e482f4855cb6baf5c6cb713)
 
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index f4d4049e391cbabd..09590d8794b1c6fb 100644
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -566,8 +566,11 @@ disable_tsx:
 	  |= bit_arch_Prefer_No_VZEROUPPER;
       else
 	{
-	  cpu_features->preferred[index_arch_Prefer_No_AVX512]
-	    |= bit_arch_Prefer_No_AVX512;
+	  /* Processors with AVX512 and AVX-VNNI won't lower CPU frequency
+	     when ZMM load and store instructions are used.  */
+	  if (!CPU_FEATURES_CPU_P (cpu_features, AVX_VNNI))
+	    cpu_features->preferred[index_arch_Prefer_No_AVX512]
+	      |= bit_arch_Prefer_No_AVX512;
 
 	  /* Avoid RTM abort triggered by VZEROUPPER inside a
 	     transactionally executing RTM region.  */