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AFAIC the upstream cpu vuln whitelist misses many 5x86 clones,
"CyrixInstead", "NexGenDriven", "RiseRiseRise", "SiS SiS SiS ",
"UMC UMC UMC ", "VIA VIA VIA ".

   - René Rebe

--- linux-5.19/arch/x86/kernel/cpu/common.c.vanilla	2022-08-17 22:54:39.789471844 +0200
+++ linux-5.19/arch/x86/kernel/cpu/common.c	2022-08-17 22:58:06.073464942 +0200
@@ -1150,10 +1150,7 @@
 
 static const __initconst struct x86_cpu_id cpu_vuln_whitelist[] = {
 	VULNWL(ANY,	4, X86_MODEL_ANY,	NO_SPECULATION),
-	VULNWL(CENTAUR,	5, X86_MODEL_ANY,	NO_SPECULATION),
-	VULNWL(INTEL,	5, X86_MODEL_ANY,	NO_SPECULATION),
-	VULNWL(NSC,	5, X86_MODEL_ANY,	NO_SPECULATION),
-	VULNWL(VORTEX,	5, X86_MODEL_ANY,	NO_SPECULATION),
+	VULNWL(ANY,	5, X86_MODEL_ANY,	NO_SPECULATION),
 	VULNWL(VORTEX,	6, X86_MODEL_ANY,	NO_SPECULATION),
 
 	/* Intel Family 6 */