Move xen-pm options from dom0 cmdline option to start info.

Thus to avoid xen-pm being manually enforced by end user in dom0 cmdline but without enabling them in xen.

signed-off-by: Wei Gang <gang.wei@intel.com>

diff -r ec15bb12588f arch/i386/kernel/acpi/processor_extcntl_xen.c
--- a/arch/i386/kernel/acpi/processor_extcntl_xen.c	Sat Jul 26 19:53:41 2008 +0800
+++ b/arch/i386/kernel/acpi/processor_extcntl_xen.c	Mon Jul 28 11:40:14 2008 +0800
@@ -33,13 +33,6 @@
 #include <asm/hypercall.h>
 
 static int xen_processor_pmbits;
-static int __init set_xen_processor_pmbits(char *str)
-{
-	get_option(&str, &xen_processor_pmbits);
-
-	return 1;
-}
-__setup("xen_processor_pmbits=", set_xen_processor_pmbits);
 
 static int xen_cx_notifier(struct acpi_processor *pr, int action)
 {
@@ -222,6 +215,8 @@ static struct processor_extcntl_ops xen_
 
 void arch_acpi_processor_init_extcntl(const struct processor_extcntl_ops **ops)
 {
+	xen_processor_pmbits = xen_start_info->xen_processor_pmbits;
+
 	if (xen_processor_pmbits & XEN_PROCESSOR_PM_CX)
 		xen_extcntl_ops.pm_ops[PM_TYPE_IDLE] = xen_cx_notifier;
 	if (xen_processor_pmbits & XEN_PROCESSOR_PM_PX)
diff -r ec15bb12588f include/xen/interface/xen.h
--- a/include/xen/interface/xen.h	Sat Jul 26 19:53:41 2008 +0800
+++ b/include/xen/interface/xen.h	Mon Jul 28 11:40:14 2008 +0800
@@ -542,6 +542,7 @@ struct start_info {
     unsigned long mod_start;    /* VIRTUAL address of pre-loaded module.  */
     unsigned long mod_len;      /* Size (bytes) of pre-loaded module.     */
     int8_t cmd_line[MAX_GUEST_CMDLINE];
+    unsigned int xen_processor_pmbits; /* cpu pm flags, XEN_PROCESSOR_PM_x */
 };
 typedef struct start_info start_info_t;