aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sparc64
diff options
context:
space:
mode:
authorDavid S. Miller <davem@sunset.davemloft.net>2007-05-25 03:37:12 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-05-29 05:49:29 -0400
commit22d6a1cba3e9ec9baf8ce4d8dd1d088e112a64f1 (patch)
treeb16a912edb689cba40395f778acb3d5dd9426fd8 /arch/sparc64
parent36b48973b8f1818d0ae6d16e548081d00162ae39 (diff)
[SPARC64]: Report proper system soft state to the hypervisor.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64')
-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
8 files changed, 148 insertions, 1 deletions
diff --git a/arch/sparc64/kernel/Makefile b/arch/sparc64/kernel/Makefile
index c749dccacc32..18e31a8db017 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 \
12 irq.o ptrace.o time.o sys_sparc.o signal.o \ 12 irq.o ptrace.o time.o sys_sparc.o signal.o \
13 unaligned.o central.o pci.o starfire.o semaphore.o \ 13 unaligned.o central.o pci.o starfire.o semaphore.o \
14 power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \ 14 power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \
15 visemul.o prom.o of_device.o hvapi.o 15 visemul.o prom.o of_device.o hvapi.o sstate.o
16 16
17obj-$(CONFIG_STACKTRACE) += stacktrace.o 17obj-$(CONFIG_STACKTRACE) += stacktrace.o
18obj-$(CONFIG_PCI) += ebus.o isa.o pci_common.o pci_iommu.o \ 18obj-$(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 732b77cb71f8..b5dbd5709155 100644
--- a/arch/sparc64/kernel/entry.S
+++ b/arch/sparc64/kernel/entry.S
@@ -1937,3 +1937,15 @@ sun4v_con_write:
1937 stx %o1, [%o4] 1937 stx %o1, [%o4]
1938 retl 1938 retl
1939 nop 1939 nop
1940
1941 /* %o0: soft state
1942 * %o1: address of description string
1943 *
1944 * returns %o0: status
1945 */
1946 .globl sun4v_mach_set_soft_state
1947sun4v_mach_set_soft_state:
1948 mov HV_FAST_MACH_SET_SOFT_STATE, %o5
1949 ta HV_FAST_TRAP
1950 retl
1951 nop
diff --git a/arch/sparc64/kernel/hvapi.c b/arch/sparc64/kernel/hvapi.c
index f54b3ed3b09e..f34f5d6181ef 100644
--- a/arch/sparc64/kernel/hvapi.c
+++ b/arch/sparc64/kernel/hvapi.c
@@ -9,6 +9,7 @@
9 9
10#include <asm/hypervisor.h> 10#include <asm/hypervisor.h>
11#include <asm/oplib.h> 11#include <asm/oplib.h>
12#include <asm/sstate.h>
12 13
13/* If the hypervisor indicates that the API setting 14/* If the hypervisor indicates that the API setting
14 * calls are unsupported, by returning HV_EBADTRAP or 15 * calls are unsupported, by returning HV_EBADTRAP or
@@ -179,6 +180,8 @@ void __init sun4v_hvapi_init(void)
179 if (sun4v_hvapi_register(group, major, &minor)) 180 if (sun4v_hvapi_register(group, major, &minor))
180 goto bad; 181 goto bad;
181 182
183 sun4v_sstate_init();
184
182 return; 185 return;
183 186
184bad: 187bad:
diff --git a/arch/sparc64/kernel/power.c b/arch/sparc64/kernel/power.c
index 699b24b890df..5d6adea3967f 100644
--- a/arch/sparc64/kernel/power.c
+++ b/arch/sparc64/kernel/power.c
@@ -19,6 +19,7 @@
19#include <asm/prom.h> 19#include <asm/prom.h>
20#include <asm/of_device.h> 20#include <asm/of_device.h>
21#include <asm/io.h> 21#include <asm/io.h>
22#include <asm/sstate.h>
22 23
23#include <linux/unistd.h> 24#include <linux/unistd.h>
24 25
@@ -53,6 +54,7 @@ static void (*poweroff_method)(void) = machine_alt_power_off;
53 54
54void machine_power_off(void) 55void machine_power_off(void)
55{ 56{
57 sstate_poweroff();
56 if (!serial_console || scons_pwroff) { 58 if (!serial_console || scons_pwroff) {
57#ifdef CONFIG_PCI 59#ifdef CONFIG_PCI
58 if (power_reg) { 60 if (power_reg) {
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index 952762bfb4c0..f5f97e2c669c 100644
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -45,6 +45,7 @@
45#include <asm/mmu_context.h> 45#include <asm/mmu_context.h>
46#include <asm/unistd.h> 46#include <asm/unistd.h>
47#include <asm/hypervisor.h> 47#include <asm/hypervisor.h>
48#include <asm/sstate.h>
48 49
49/* #define VERBOSE_SHOWREGS */ 50/* #define VERBOSE_SHOWREGS */
50 51
@@ -106,6 +107,7 @@ extern void (*prom_keyboard)(void);
106 107
107void machine_halt(void) 108void machine_halt(void)
108{ 109{
110 sstate_halt();
109 if (!serial_console && prom_palette) 111 if (!serial_console && prom_palette)
110 prom_palette (1); 112 prom_palette (1);
111 if (prom_keyboard) 113 if (prom_keyboard)
@@ -116,6 +118,7 @@ void machine_halt(void)
116 118
117void machine_alt_power_off(void) 119void machine_alt_power_off(void)
118{ 120{
121 sstate_poweroff();
119 if (!serial_console && prom_palette) 122 if (!serial_console && prom_palette)
120 prom_palette(1); 123 prom_palette(1);
121 if (prom_keyboard) 124 if (prom_keyboard)
@@ -128,6 +131,7 @@ void machine_restart(char * cmd)
128{ 131{
129 char *p; 132 char *p;
130 133
134 sstate_reboot();
131 p = strchr (reboot_command, '\n'); 135 p = strchr (reboot_command, '\n');
132 if (p) *p = 0; 136 if (p) *p = 0;
133 if (!serial_console && prom_palette) 137 if (!serial_console && prom_palette)
diff --git a/arch/sparc64/kernel/sstate.c b/arch/sparc64/kernel/sstate.c
new file mode 100644
index 000000000000..5b6e75b7f052
--- /dev/null
+++ b/arch/sparc64/kernel/sstate.c
@@ -0,0 +1,104 @@
1/* sstate.c: System soft state support.
2 *
3 * Copyright (C) 2007 David S. Miller <davem@davemloft.net>
4 */
5
6#include <linux/kernel.h>
7#include <linux/notifier.h>
8#include <linux/init.h>
9
10#include <asm/hypervisor.h>
11#include <asm/sstate.h>
12#include <asm/oplib.h>
13#include <asm/head.h>
14#include <asm/io.h>
15
16static int hv_supports_soft_state;
17
18static unsigned long kimage_addr_to_ra(const char *p)
19{
20 unsigned long val = (unsigned long) p;
21
22 return kern_base + (val - KERNBASE);
23}
24
25static void do_set_sstate(unsigned long state, const char *msg)
26{
27 unsigned long err;
28
29 if (!hv_supports_soft_state)
30 return;
31
32 err = sun4v_mach_set_soft_state(state, kimage_addr_to_ra(msg));
33 if (err) {
34 printk(KERN_WARNING "SSTATE: Failed to set soft-state to "
35 "state[%lx] msg[%s], err=%lu\n",
36 state, msg, err);
37 }
38}
39
40static const char booting_msg[32] __attribute__((aligned(32))) =
41 "Linux booting";
42static const char running_msg[32] __attribute__((aligned(32))) =
43 "Linux running";
44static const char halting_msg[32] __attribute__((aligned(32))) =
45 "Linux halting";
46static const char poweroff_msg[32] __attribute__((aligned(32))) =
47 "Linux powering off";
48static const char rebooting_msg[32] __attribute__((aligned(32))) =
49 "Linux rebooting";
50static const char panicing_msg[32] __attribute__((aligned(32))) =
51 "Linux panicing";
52
53void sstate_booting(void)
54{
55 do_set_sstate(HV_SOFT_STATE_TRANSITION, booting_msg);
56}
57
58void sstate_running(void)
59{
60 do_set_sstate(HV_SOFT_STATE_NORMAL, running_msg);
61}
62
63void sstate_halt(void)
64{
65 do_set_sstate(HV_SOFT_STATE_TRANSITION, halting_msg);
66}
67
68void sstate_poweroff(void)
69{
70 do_set_sstate(HV_SOFT_STATE_TRANSITION, poweroff_msg);
71}
72
73void sstate_reboot(void)
74{
75 do_set_sstate(HV_SOFT_STATE_TRANSITION, rebooting_msg);
76}
77
78static int sstate_panic_event(struct notifier_block *n, unsigned long event, void *ptr)
79{
80 do_set_sstate(HV_SOFT_STATE_TRANSITION, panicing_msg);
81
82 return NOTIFY_DONE;
83}
84
85static struct notifier_block sstate_panic_block = {
86 .notifier_call = sstate_panic_event,
87 .priority = INT_MAX,
88};
89
90void __init sun4v_sstate_init(void)
91{
92 unsigned long major, minor;
93
94 major = 1;
95 minor = 0;
96 if (sun4v_hvapi_register(HV_GRP_SOFT_STATE, major, &minor))
97 return;
98
99 hv_supports_soft_state = 1;
100
101 prom_sun4v_guest_soft_state();
102 atomic_notifier_chain_register(&panic_notifier_list,
103 &sstate_panic_block);
104}
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 6e5b01d779d2..0c9995c3b8ed 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -43,6 +43,7 @@
43#include <asm/tsb.h> 43#include <asm/tsb.h>
44#include <asm/hypervisor.h> 44#include <asm/hypervisor.h>
45#include <asm/prom.h> 45#include <asm/prom.h>
46#include <asm/sstate.h>
46 47
47extern void device_scan(void); 48extern void device_scan(void);
48 49
@@ -1348,6 +1349,8 @@ void __init paging_init(void)
1348 kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL; 1349 kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
1349 kern_size = (unsigned long)&_end - (unsigned long)KERNBASE; 1350 kern_size = (unsigned long)&_end - (unsigned long)KERNBASE;
1350 1351
1352 sstate_booting();
1353
1351 /* Invalidate both kernel TSBs. */ 1354 /* Invalidate both kernel TSBs. */
1352 memset(swapper_tsb, 0x40, sizeof(swapper_tsb)); 1355 memset(swapper_tsb, 0x40, sizeof(swapper_tsb));
1353#ifndef CONFIG_DEBUG_PAGEALLOC 1356#ifndef CONFIG_DEBUG_PAGEALLOC
diff --git a/arch/sparc64/prom/misc.c b/arch/sparc64/prom/misc.c
index 0b4213720d43..f3e0c14e9eef 100644
--- a/arch/sparc64/prom/misc.c
+++ b/arch/sparc64/prom/misc.c
@@ -15,6 +15,25 @@
15#include <asm/oplib.h> 15#include <asm/oplib.h>
16#include <asm/system.h> 16#include <asm/system.h>
17 17
18int prom_service_exists(const char *service_name)
19{
20 int err = p1275_cmd("test", P1275_ARG(0, P1275_ARG_IN_STRING) |
21 P1275_INOUT(1, 1), service_name);
22
23 if (err)
24 return 0;
25 return 1;
26}
27
28void prom_sun4v_guest_soft_state(void)
29{
30 const char *svc = "SUNW,soft-state-supported";
31
32 if (!prom_service_exists(svc))
33 return;
34 p1275_cmd(svc, P1275_INOUT(0, 0));
35}
36
18/* Reset and reboot the machine with the command 'bcommand'. */ 37/* Reset and reboot the machine with the command 'bcommand'. */
19void prom_reboot(const char *bcommand) 38void prom_reboot(const char *bcommand)
20{ 39{