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-rw-r--r--arch/sparc64/kernel/Makefile2
-rw-r--r--arch/sparc64/kernel/entry.S12
-rw-r--r--arch/sparc64/kernel/hvapi.c3
-rw-r--r--arch/sparc64/kernel/power.c2
-rw-r--r--arch/sparc64/kernel/process.c4
-rw-r--r--arch/sparc64/kernel/sstate.c104
-rw-r--r--arch/sparc64/mm/init.c3
-rw-r--r--arch/sparc64/prom/misc.c19
-rw-r--r--include/asm-sparc64/bugs.h8
-rw-r--r--include/asm-sparc64/hypervisor.h10
-rw-r--r--include/asm-sparc64/oplib.h2
-rw-r--r--include/asm-sparc64/sstate.h13
12 files changed, 175 insertions, 7 deletions
diff --git a/arch/sparc64/kernel/Makefile b/arch/sparc64/kernel/Makefile
index c749dccacc3..18e31a8db01 100644
--- a/arch/sparc64/kernel/Makefile
+++ b/arch/sparc64/kernel/Makefile
@@ -12,7 +12,7 @@ obj-y := process.o setup.o cpu.o idprom.o \
irq.o ptrace.o time.o sys_sparc.o signal.o \
unaligned.o central.o pci.o starfire.o semaphore.o \
power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \
- visemul.o prom.o of_device.o hvapi.o
+ visemul.o prom.o of_device.o hvapi.o sstate.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-$(CONFIG_PCI) += ebus.o isa.o pci_common.o pci_iommu.o \
diff --git a/arch/sparc64/kernel/entry.S b/arch/sparc64/kernel/entry.S
index 732b77cb71f..b5dbd570915 100644
--- a/arch/sparc64/kernel/entry.S
+++ b/arch/sparc64/kernel/entry.S
@@ -1937,3 +1937,15 @@ sun4v_con_write:
stx %o1, [%o4]
retl
nop
+
+ /* %o0: soft state
+ * %o1: address of description string
+ *
+ * returns %o0: status
+ */
+ .globl sun4v_mach_set_soft_state
+sun4v_mach_set_soft_state:
+ mov HV_FAST_MACH_SET_SOFT_STATE, %o5
+ ta HV_FAST_TRAP
+ retl
+ nop
diff --git a/arch/sparc64/kernel/hvapi.c b/arch/sparc64/kernel/hvapi.c
index f54b3ed3b09..f34f5d6181e 100644
--- a/arch/sparc64/kernel/hvapi.c
+++ b/arch/sparc64/kernel/hvapi.c
@@ -9,6 +9,7 @@
#include <asm/hypervisor.h>
#include <asm/oplib.h>
+#include <asm/sstate.h>
/* If the hypervisor indicates that the API setting
* calls are unsupported, by returning HV_EBADTRAP or
@@ -179,6 +180,8 @@ void __init sun4v_hvapi_init(void)
if (sun4v_hvapi_register(group, major, &minor))
goto bad;
+ sun4v_sstate_init();
+
return;
bad:
diff --git a/arch/sparc64/kernel/power.c b/arch/sparc64/kernel/power.c
index 699b24b890d..5d6adea3967 100644
--- a/arch/sparc64/kernel/power.c
+++ b/arch/sparc64/kernel/power.c
@@ -19,6 +19,7 @@
#include <asm/prom.h>
#include <asm/of_device.h>
#include <asm/io.h>
+#include <asm/sstate.h>
#include <linux/unistd.h>
@@ -53,6 +54,7 @@ static void (*poweroff_method)(void) = machine_alt_power_off;
void machine_power_off(void)
{
+ sstate_poweroff();
if (!serial_console || scons_pwroff) {
#ifdef CONFIG_PCI
if (power_reg) {
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index 952762bfb4c..f5f97e2c669 100644
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -45,6 +45,7 @@
#include <asm/mmu_context.h>
#include <asm/unistd.h>
#include <asm/hypervisor.h>
+#include <asm/sstate.h>
/* #define VERBOSE_SHOWREGS */
@@ -106,6 +107,7 @@ extern void (*prom_keyboard)(void);
void machine_halt(void)
{
+ sstate_halt();
if (!serial_console && prom_palette)
prom_palette (1);
if (prom_keyboard)
@@ -116,6 +118,7 @@ void machine_halt(void)
void machine_alt_power_off(void)
{
+ sstate_poweroff();
if (!serial_console && prom_palette)
prom_palette(1);
if (prom_keyboard)
@@ -128,6 +131,7 @@ void machine_restart(char * cmd)
{
char *p;
+ sstate_reboot();
p = strchr (reboot_command, '\n');
if (p) *p = 0;
if (!serial_console && prom_palette)
diff --git a/arch/sparc64/kernel/sstate.c b/arch/sparc64/kernel/sstate.c
new file mode 100644
index 00000000000..5b6e75b7f05
--- /dev/null
+++ b/arch/sparc64/kernel/sstate.c
@@ -0,0 +1,104 @@
+/* sstate.c: System soft state support.
+ *
+ * Copyright (C) 2007 David S. Miller <davem@davemloft.net>
+ */
+
+#include <linux/kernel.h>
+#include <linux/notifier.h>
+#include <linux/init.h>
+
+#include <asm/hypervisor.h>
+#include <asm/sstate.h>
+#include <asm/oplib.h>
+#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;
+
+ return kern_base + (val - KERNBASE);
+}
+
+static void do_set_sstate(unsigned long state, const char *msg)
+{
+ unsigned long err;
+
+ if (!hv_supports_soft_state)
+ return;
+
+ err = sun4v_mach_set_soft_state(state, kimage_addr_to_ra(msg));
+ if (err) {
+ printk(KERN_WARNING "SSTATE: Failed to set soft-state to "
+ "state[%lx] msg[%s], err=%lu\n",
+ state, msg, err);
+ }
+}
+
+static const char booting_msg[32] __attribute__((aligned(32))) =
+ "Linux booting";
+static const char running_msg[32] __attribute__((aligned(32))) =
+ "Linux running";
+static const char halting_msg[32] __attribute__((aligned(32))) =
+ "Linux halting";
+static const char poweroff_msg[32] __attribute__((aligned(32))) =
+ "Linux powering off";
+static const char rebooting_msg[32] __attribute__((aligned(32))) =
+ "Linux rebooting";
+static const char panicing_msg[32] __attribute__((aligned(32))) =
+ "Linux panicing";
+
+void sstate_booting(void)
+{
+ do_set_sstate(HV_SOFT_STATE_TRANSITION, booting_msg);
+}
+
+void sstate_running(void)
+{
+ do_set_sstate(HV_SOFT_STATE_NORMAL, running_msg);
+}
+
+void sstate_halt(void)
+{
+ do_set_sstate(HV_SOFT_STATE_TRANSITION, halting_msg);
+}
+
+void sstate_poweroff(void)
+{
+ do_set_sstate(HV_SOFT_STATE_TRANSITION, poweroff_msg);
+}
+
+void sstate_reboot(void)
+{
+ do_set_sstate(HV_SOFT_STATE_TRANSITION, rebooting_msg);
+}
+
+static int sstate_panic_event(struct notifier_block *n, unsigned long event, void *ptr)
+{
+ do_set_sstate(HV_SOFT_STATE_TRANSITION, panicing_msg);
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block sstate_panic_block = {
+ .notifier_call = sstate_panic_event,
+ .priority = INT_MAX,
+};
+
+void __init sun4v_sstate_init(void)
+{
+ unsigned long major, minor;
+
+ major = 1;
+ minor = 0;
+ if (sun4v_hvapi_register(HV_GRP_SOFT_STATE, major, &minor))
+ return;
+
+ hv_supports_soft_state = 1;
+
+ prom_sun4v_guest_soft_state();
+ atomic_notifier_chain_register(&panic_notifier_list,
+ &sstate_panic_block);
+}
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 6e5b01d779d..0c9995c3b8e 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -43,6 +43,7 @@
#include <asm/tsb.h>
#include <asm/hypervisor.h>
#include <asm/prom.h>
+#include <asm/sstate.h>
extern void device_scan(void);
@@ -1348,6 +1349,8 @@ void __init paging_init(void)
kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
kern_size = (unsigned long)&_end - (unsigned long)KERNBASE;
+ sstate_booting();
+
/* Invalidate both kernel TSBs. */
memset(swapper_tsb, 0x40, sizeof(swapper_tsb));
#ifndef CONFIG_DEBUG_PAGEALLOC
diff --git a/arch/sparc64/prom/misc.c b/arch/sparc64/prom/misc.c
index 0b4213720d4..f3e0c14e9ee 100644
--- a/arch/sparc64/prom/misc.c
+++ b/arch/sparc64/prom/misc.c
@@ -15,6 +15,25 @@
#include <asm/oplib.h>
#include <asm/system.h>
+int prom_service_exists(const char *service_name)
+{
+ int err = p1275_cmd("test", P1275_ARG(0, P1275_ARG_IN_STRING) |
+ P1275_INOUT(1, 1), service_name);
+
+ if (err)
+ return 0;
+ return 1;
+}
+
+void prom_sun4v_guest_soft_state(void)
+{
+ const char *svc = "SUNW,soft-state-supported";
+
+ if (!prom_service_exists(svc))
+ return;
+ p1275_cmd(svc, P1275_INOUT(0, 0));
+}
+
/* Reset and reboot the machine with the command 'bcommand'. */
void prom_reboot(const char *bcommand)
{
diff --git a/include/asm-sparc64/bugs.h b/include/asm-sparc64/bugs.h
index 120422fdb02..bf39d86c0c9 100644
--- a/include/asm-sparc64/bugs.h
+++ b/include/asm-sparc64/bugs.h
@@ -1,9 +1,8 @@
-/* $Id: bugs.h,v 1.1 1996/12/26 13:25:20 davem Exp $
- * include/asm-sparc64/bugs.h: Sparc probes for various bugs.
+/* bugs.h: Sparc64 probes for various bugs.
*
- * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1996, 2007 David S. Miller (davem@davemloft.net)
*/
-
+#include <asm/sstate.h>
extern unsigned long loops_per_jiffy;
@@ -12,4 +11,5 @@ static void __init check_bugs(void)
#ifndef CONFIG_SMP
cpu_data(0).udelay_val = loops_per_jiffy;
#endif
+ sstate_running();
}
diff --git a/include/asm-sparc64/hypervisor.h b/include/asm-sparc64/hypervisor.h
index a5558c87556..17b233b64af 100644
--- a/include/asm-sparc64/hypervisor.h
+++ b/include/asm-sparc64/hypervisor.h
@@ -162,10 +162,15 @@
* terminated 7-bit ASCII string of up to 31 characters not including the
* NULL termination.
*/
-#define HV_FAST_MACH_SET_SOFT_STATE 0x03
+#define HV_FAST_MACH_SET_SOFT_STATE 0x70
#define HV_SOFT_STATE_NORMAL 0x01
#define HV_SOFT_STATE_TRANSITION 0x02
+#ifndef __ASSEMBLY__
+extern unsigned long sun4v_mach_set_soft_state(unsigned long soft_state,
+ unsigned long msg_string_ra);
+#endif
+
/* mach_get_soft_state()
* TRAP: HV_FAST_TRAP
* FUNCTION: HV_FAST_MACH_GET_SOFT_STATE
@@ -181,7 +186,7 @@
* for the software state pointer are the same as for mach_set_soft_state()
* above.
*/
-#define HV_FAST_MACH_GET_SOFT_STATE 0x04
+#define HV_FAST_MACH_GET_SOFT_STATE 0x71
/* CPU services.
*
@@ -2204,6 +2209,7 @@ extern void sun4v_hvapi_unregister(unsigned long group);
extern int sun4v_hvapi_get(unsigned long group,
unsigned long *major,
unsigned long *minor);
+extern void sun4v_hvapi_init(void);
#endif
#endif /* !(_SPARC64_HYPERVISOR_H) */
diff --git a/include/asm-sparc64/oplib.h b/include/asm-sparc64/oplib.h
index 6a0da3b1695..07275e2366a 100644
--- a/include/asm-sparc64/oplib.h
+++ b/include/asm-sparc64/oplib.h
@@ -316,6 +316,8 @@ extern int prom_setprop(int node, const char *prop_name, char *prop_value,
extern int prom_pathtoinode(const char *path);
extern int prom_inst2pkg(int);
+extern int prom_service_exists(const char *service_name);
+extern void prom_sun4v_guest_soft_state(void);
/* CPU probing helpers. */
struct device_node;
diff --git a/include/asm-sparc64/sstate.h b/include/asm-sparc64/sstate.h
new file mode 100644
index 00000000000..a7c35dbcb28
--- /dev/null
+++ b/include/asm-sparc64/sstate.h
@@ -0,0 +1,13 @@
+#ifndef _SPARC64_SSTATE_H
+#define _SPARC64_SSTATE_H
+
+extern void sstate_booting(void);
+extern void sstate_running(void);
+extern void sstate_halt(void);
+extern void sstate_poweroff(void);
+extern void sstate_panic(void);
+extern void sstate_reboot(void);
+
+extern void sun4v_sstate_init(void);
+
+#endif /* _SPARC64_SSTATE_H */
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-14 06:06:54 +0000