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 37fae02cc335 xen/arch/x86/domain_build.c
--- a/xen/arch/x86/domain_build.c	Fri Jul 25 15:03:03 2008 +0100
+++ b/xen/arch/x86/domain_build.c	Mon Jul 28 16:27:57 2008 +0800
@@ -757,6 +757,7 @@ int __init construct_dom0(
     si->shared_info = virt_to_maddr(d->shared_info);
 
     si->flags        = SIF_PRIVILEGED | SIF_INITDOMAIN;
+    si->flags       |= (xen_processor_pmbits << 8) & SIF_PM_MASK;
     si->pt_base      = vpt_start + 2 * PAGE_SIZE * !!is_pv_32on64_domain(d);
     si->nr_pt_frames = nr_pt_pages;
     si->mfn_list     = vphysmap_start;
diff -r 37fae02cc335 xen/arch/x86/setup.c
--- a/xen/arch/x86/setup.c	Fri Jul 25 15:03:03 2008 +0100
+++ b/xen/arch/x86/setup.c	Mon Jul 28 16:27:57 2008 +0800
@@ -997,7 +997,6 @@ void __init __start_xen(unsigned long mb
     if ( (cmdline != NULL) || (kextra != NULL) )
     {
         static char dom0_cmdline[MAX_GUEST_CMDLINE];
-        char xen_pm_param[32];
 
         cmdline = cmdline_cook(cmdline);
         safe_strcpy(dom0_cmdline, cmdline);
@@ -1022,14 +1021,6 @@ void __init __start_xen(unsigned long mb
             safe_strcat(dom0_cmdline, " acpi=");
             safe_strcat(dom0_cmdline, acpi_param);
         }
-        if ( xen_cpuidle )
-            xen_processor_pmbits |= XEN_PROCESSOR_PM_CX;
-
-        snprintf(xen_pm_param, sizeof(xen_pm_param), 
-            " xen_processor_pmbits=%d", xen_processor_pmbits);
-
-        if ( !strstr(dom0_cmdline, "xen_processor_pmbits=") )
-            safe_strcat(dom0_cmdline, xen_pm_param);
 
         cmdline = dom0_cmdline;
     }
@@ -1040,6 +1031,9 @@ void __init __start_xen(unsigned long mb
             (mod[initrdidx].mod_start - mod[0].mod_start);
         _initrd_len   = mod[initrdidx].mod_end - mod[initrdidx].mod_start;
     }
+
+    if ( xen_cpuidle )
+        xen_processor_pmbits |= XEN_PROCESSOR_PM_CX;
 
     /*
      * We're going to setup domain0 using the module(s) that we stashed safely
diff -r 37fae02cc335 xen/include/public/xen.h
--- a/xen/include/public/xen.h	Fri Jul 25 15:03:03 2008 +0100
+++ b/xen/include/public/xen.h	Mon Jul 28 16:27:57 2008 +0800
@@ -554,6 +554,7 @@ typedef struct start_info start_info_t;
 /* These flags are passed in the 'flags' field of start_info_t. */
 #define SIF_PRIVILEGED    (1<<0)  /* Is the domain privileged? */
 #define SIF_INITDOMAIN    (1<<1)  /* Is this the initial control domain? */
+#define SIF_PM_MASK       (0xFF<<8) /* reserve 1 byte for xen-pm options */
 
 typedef struct dom0_vga_console_info {
     uint8_t video_type; /* DOM0_VGA_CONSOLE_??? */