Merge branch 'slab/urgent' into slab/next

[pandora-kernel.git] / arch / sparc / kernel / ds.c

diff --git a/arch/sparc/kernel/ds.c b/arch/sparc/kernel/ds.c
index dd1342c..490e541 100644 (file)
--- a/arch/sparc/kernel/ds.c
+++ b/arch/sparc/kernel/ds.c
@@ -15,12 +15,15 @@
 #include <linux/reboot.h>
 #include <linux/cpu.h>
 
+#include <asm/hypervisor.h>
 #include <asm/ldc.h>
 #include <asm/vio.h>
 #include <asm/mdesc.h>
 #include <asm/head.h>
 #include <asm/irq.h>
 
+#include "kernel.h"
+
 #define DRV_MODULE_NAME                "ds"
 #define PFX DRV_MODULE_NAME    ": "
 #define DRV_MODULE_VERSION     "1.0"
@@ -828,18 +831,32 @@ void ldom_set_var(const char *var, const char *value)
        }
 }
 
+static char full_boot_str[256] __attribute__((aligned(32)));
+static int reboot_data_supported;
+
 void ldom_reboot(const char *boot_command)
 {
        /* Don't bother with any of this if the boot_command
         * is empty.
         */
        if (boot_command && strlen(boot_command)) {
-               char full_boot_str[256];
+               unsigned long len;
 
                strcpy(full_boot_str, "boot ");
                strcpy(full_boot_str + strlen("boot "), boot_command);
+               len = strlen(full_boot_str);
 
-               ldom_set_var("reboot-command", full_boot_str);
+               if (reboot_data_supported) {
+                       unsigned long ra = kimage_addr_to_ra(full_boot_str);
+                       unsigned long hv_ret;
+
+                       hv_ret = sun4v_reboot_data_set(ra, len);
+                       if (hv_ret != HV_EOK)
+                               pr_err("SUN4V: Unable to set reboot data "
+                                      "hv_ret=%lu\n", hv_ret);
+               } else {
+                       ldom_set_var("reboot-command", full_boot_str);
+               }
        }
        sun4v_mach_sir();
 }
@@ -1237,6 +1254,15 @@ static struct vio_driver ds_driver = {
 
 static int __init ds_init(void)
 {
+       unsigned long hv_ret, major, minor;
+
+       hv_ret = sun4v_get_version(HV_GRP_REBOOT_DATA, &major, &minor);
+       if (hv_ret == HV_EOK) {
+               pr_info("SUN4V: Reboot data supported (maj=%lu,min=%lu).\n",
+                       major, minor);
+               reboot_data_supported = 1;
+       }
+
        kthread_run(ds_thread, NULL, "kldomd");
 
        return vio_register_driver(&ds_driver);