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sparc: Set reboot-cmd using reboot data hypervisor call if available.

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Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2011-08-01 23:27:17 -07:00
parent e2eb9f8158
commit ea5e7447ea
5 changed files with 53 additions and 9 deletions
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30
arch/sparc/kernel/ds.c
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@@ -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);