x86: make x86_64 accept the max_cpus parameter
The parameter passing parsing is done in the common smpboot.c
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index c35cd31..34c3117 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -268,3 +268,15 @@
}
#endif
+/*
+ * If the BIOS enumerates physical processors before logical,
+ * maxcpus=N at enumeration-time can be used to disable HT.
+ */
+static int __init parse_maxcpus(char *arg)
+{
+ extern unsigned int maxcpus;
+
+ maxcpus = simple_strtoul(arg, NULL, 0);
+ return 0;
+}
+early_param("maxcpus", parse_maxcpus);