diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
index 8233a630280f52052ffb9a5f7c89f273cedf0425..dde437f5d14ff828dccff19275033ff2330acc60 100644
--- a/arch/x86/kernel/acpi/cstate.c
+++ b/arch/x86/kernel/acpi/cstate.c
@@ -167,7 +167,8 @@ static int __init ffh_cstate_init(void)
 {
 	struct cpuinfo_x86 *c = &boot_cpu_data;
 
-	if (c->x86_vendor != X86_VENDOR_INTEL)
+	if (c->x86_vendor != X86_VENDOR_INTEL &&
+	    c->x86_vendor != X86_VENDOR_AMD)
 		return -1;
 
 	cpu_cstate_entry = alloc_percpu(struct cstate_entry);