x86/fault: Skip erratum torvalds#93 workaround on new CPUs

Erratum torvalds#93 applies to the first generation of AMD K8 CPUs. Skip the workaround on newer CPUs. Signed-off-by: Andy Lutomirski <[email protected]>
ammarfaizi2 · Feb 10, 2021 · c7010da · c7010da
1 parent 79b73a4
commit c7010da
Showing 1 changed file with 2 additions and 3 deletions.
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
@@ -442,9 +442,8 @@ static void dump_pagetable(unsigned long address)
  */
 static int is_errata93(struct pt_regs *regs, unsigned long address)
 {
-#if defined(CONFIG_X86_64) && defined(CONFIG_CPU_SUP_AMD)
-	if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD
-	    || boot_cpu_data.x86 != 0xf)
+#if defined(CONFIG_X86_64)
+	if (!is_amd_k8_pre_npt())
 		return 0;
 
 	if (user_mode(regs))