3.0-stable review patch. If anyone has any objections, please let us know.
------------------
From: "David S. Miller" <da...@davemloft.net>
[ Upstream commit ea5e7447ea9d555558e0f13798f5143dd51a915a ]
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@suse.de>
---
arch/sparc/include/asm/hypervisor.h | 7 +++++++
arch/sparc/kernel/ds.c | 30 ++++++++++++++++++++++++++++--
arch/sparc/kernel/hvcalls.S | 7 +++++++
arch/sparc/kernel/kernel.h | 9 +++++++++
arch/sparc/kernel/sstate.c | 9 ++-------
5 files changed, 53 insertions(+), 9 deletions(-)
--- a/arch/sparc/include/asm/hypervisor.h
+++ b/arch/sparc/include/asm/hypervisor.h
@@ -2927,6 +2927,13 @@ extern unsigned long sun4v_ncs_request(u
#define HV_FAST_FIRE_GET_PERFREG 0x120
#define HV_FAST_FIRE_SET_PERFREG 0x121
+#define HV_FAST_REBOOT_DATA_SET 0x172
+
+#ifndef __ASSEMBLY__
+extern unsigned long sun4v_reboot_data_set(unsigned long ra,
+ unsigned long len);
+#endif
+
/* Function numbers for HV_CORE_TRAP. */
#define HV_CORE_SET_VER 0x00
#define HV_CORE_PUTCHAR 0x01
--- 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
}
}
+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);
--- a/arch/sparc/kernel/hvcalls.S
+++ b/arch/sparc/kernel/hvcalls.S
@@ -798,3 +798,10 @@ ENTRY(sun4v_niagara2_setperf)
retl
nop
ENDPROC(sun4v_niagara2_setperf)
+
+ENTRY(sun4v_reboot_data_set)
+ mov HV_FAST_REBOOT_DATA_SET, %o5
+ ta HV_FAST_TRAP
+ retl
+ nop
+ENDPROC(sun4v_reboot_data_set)
--- a/arch/sparc/kernel/kernel.h
+++ b/arch/sparc/kernel/kernel.h
@@ -4,6 +4,8 @@
#include <linux/interrupt.h>
#include <asm/traps.h>
+#include <asm/head.h>
+#include <asm/io.h>
/* cpu.c */
extern const char *sparc_pmu_type;
@@ -14,6 +16,13 @@ extern int ncpus_probed;
/* setup_64.c */
struct seq_file;
extern void cpucap_info(struct seq_file *);
+
+static inline unsigned long kimage_addr_to_ra(const char *p)
+{
+ unsigned long val = (unsigned long) p;
+
+ return kern_base + (val - KERNBASE);
+}
#endif
#ifdef CONFIG_SPARC32
--- a/arch/sparc/kernel/sstate.c
+++ b/arch/sparc/kernel/sstate.c
@@ -14,14 +14,9 @@
#include <asm/head.h>
#include <asm/io.h>
-static int hv_supports_soft_state;
-
-static unsigned long kimage_addr_to_ra(const char *p)
-{
- unsigned long val = (unsigned long) p;
+#include "kernel.h"
- return kern_base + (val - KERNBASE);
-}
+static int hv_supports_soft_state;
static void do_set_sstate(unsigned long state, const char *msg)
{
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