x86/cpu: Add INTEL_LUNARLAKE_M to X86_BUG_MONITOR

Under some conditions, MONITOR wakeups on Lunar Lake processors can be lost, resulting in significant user-visible delays. Add LunarLake to X86_BUG_MONITOR so that wake_up_idle_cpu() always sends an IPI, avoiding this potential delay. Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219364 Cc: [email protected] # 6.11 Signed-off-by: Len Brown <[email protected]>
deepin-community · Nov 19, 2024 · 53b0ade · 53b0ade
1 parent cc7df1f
commit 53b0ade
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
@@ -586,7 +586,9 @@ static void init_intel(struct cpuinfo_x86 *c)
 	     c->x86_vfm == INTEL_WESTMERE_EX))
 		set_cpu_bug(c, X86_BUG_CLFLUSH_MONITOR);
 
-	if (boot_cpu_has(X86_FEATURE_MWAIT) && c->x86_vfm == INTEL_ATOM_GOLDMONT)
+	if (boot_cpu_has(X86_FEATURE_MWAIT) &&
+	    (c->x86_vfm == INTEL_ATOM_GOLDMONT
+	     || c->x86_vfm == INTEL_LUNARLAKE_M))
 		set_cpu_bug(c, X86_BUG_MONITOR);
 
 #ifdef CONFIG_X86_64