[SPARC64]: Fix setting of variables in LDOM guest.
There is a special domain services capability for setting
variables in the OBP options node. Guests don't have permanent
store for the OBP variables like a normal system, so they are
instead maintained in the LDOM control node or in the SC.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/ds.c b/arch/sparc64/kernel/ds.c
index 9c8839d..4e20ef2 100644
--- a/arch/sparc64/kernel/ds.c
+++ b/arch/sparc64/kernel/ds.c
@@ -11,6 +11,7 @@
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/delay.h>
+#include <linux/mutex.h>
#include <asm/ldc.h>
#include <asm/vio.h>
@@ -171,7 +172,7 @@
rp = (struct ds_md_update_req *) (dpkt + 1);
- printk(KERN_ERR PFX "Machine description update.\n");
+ printk(KERN_INFO PFX "Machine description update.\n");
memset(&pkt, 0, sizeof(pkt));
pkt.data.tag.type = DS_DATA;
@@ -248,8 +249,8 @@
rp = (struct ds_panic_req *) (dpkt + 1);
- printk(KERN_ERR PFX "Panic REQ [%lx], len=%d\n",
- rp->req_num, len);
+ printk(KERN_ALERT PFX "Panic request from "
+ "LDOM manager received.\n");
memset(&pkt, 0, sizeof(pkt));
pkt.data.tag.type = DS_DATA;
@@ -313,10 +314,60 @@
rp = (struct ds_pri_msg *) (dpkt + 1);
- printk(KERN_ERR PFX "PRI REQ [%lx:%lx], len=%d\n",
+ printk(KERN_INFO PFX "PRI REQ [%lx:%lx], len=%d\n",
rp->req_num, rp->type, len);
}
+struct ds_var_hdr {
+ __u32 type;
+#define DS_VAR_SET_REQ 0x00
+#define DS_VAR_DELETE_REQ 0x01
+#define DS_VAR_SET_RESP 0x02
+#define DS_VAR_DELETE_RESP 0x03
+};
+
+struct ds_var_set_msg {
+ struct ds_var_hdr hdr;
+ char name_and_value[0];
+};
+
+struct ds_var_delete_msg {
+ struct ds_var_hdr hdr;
+ char name[0];
+};
+
+struct ds_var_resp {
+ struct ds_var_hdr hdr;
+ __u32 result;
+#define DS_VAR_SUCCESS 0x00
+#define DS_VAR_NO_SPACE 0x01
+#define DS_VAR_INVALID_VAR 0x02
+#define DS_VAR_INVALID_VAL 0x03
+#define DS_VAR_NOT_PRESENT 0x04
+};
+
+static DEFINE_MUTEX(ds_var_mutex);
+static int ds_var_doorbell;
+static int ds_var_response;
+
+static void ds_var_data(struct ldc_channel *lp,
+ struct ds_cap_state *dp,
+ void *buf, int len)
+{
+ struct ds_data *dpkt = buf;
+ struct ds_var_resp *rp;
+
+ rp = (struct ds_var_resp *) (dpkt + 1);
+
+ if (rp->hdr.type != DS_VAR_SET_RESP &&
+ rp->hdr.type != DS_VAR_DELETE_RESP)
+ return;
+
+ ds_var_response = rp->result;
+ wmb();
+ ds_var_doorbell = 1;
+}
+
struct ds_cap_state ds_states[] = {
{
.service_id = "md-update",
@@ -338,17 +389,16 @@
.service_id = "pri",
.data = ds_pri_data,
},
+ {
+ .service_id = "var-config",
+ .data = ds_var_data,
+ },
+ {
+ .service_id = "var-config-backup",
+ .data = ds_var_data,
+ },
};
-static struct ds_cap_state *find_cap(u64 handle)
-{
- unsigned int index = handle >> 32;
-
- if (index >= ARRAY_SIZE(ds_states))
- return NULL;
- return &ds_states[index];
-}
-
static DEFINE_SPINLOCK(ds_lock);
struct ds_info {
@@ -361,6 +411,115 @@
int rcv_buf_len;
};
+static struct ds_info *ds_info;
+
+static struct ds_cap_state *find_cap(u64 handle)
+{
+ unsigned int index = handle >> 32;
+
+ if (index >= ARRAY_SIZE(ds_states))
+ return NULL;
+ return &ds_states[index];
+}
+
+static struct ds_cap_state *find_cap_by_string(const char *name)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ds_states); i++) {
+ if (strcmp(ds_states[i].service_id, name))
+ continue;
+
+ return &ds_states[i];
+ }
+ return NULL;
+}
+
+void ldom_set_var(const char *var, const char *value)
+{
+ struct ds_info *dp = ds_info;
+ struct ds_cap_state *cp;
+
+ cp = find_cap_by_string("var-config");
+ if (cp->state != CAP_STATE_REGISTERED)
+ cp = find_cap_by_string("var-config-backup");
+
+ if (cp->state == CAP_STATE_REGISTERED) {
+ union {
+ struct {
+ struct ds_data data;
+ struct ds_var_set_msg msg;
+ } header;
+ char all[512];
+ } pkt;
+ unsigned long flags;
+ char *base, *p;
+ int msg_len, loops;
+
+ memset(&pkt, 0, sizeof(pkt));
+ pkt.header.data.tag.type = DS_DATA;
+ pkt.header.data.handle = cp->handle;
+ pkt.header.msg.hdr.type = DS_VAR_SET_REQ;
+ base = p = &pkt.header.msg.name_and_value[0];
+ strcpy(p, var);
+ p += strlen(var) + 1;
+ strcpy(p, value);
+ p += strlen(value) + 1;
+
+ msg_len = (sizeof(struct ds_data) +
+ sizeof(struct ds_var_set_msg) +
+ (p - base));
+ msg_len = (msg_len + 3) & ~3;
+ pkt.header.data.tag.len = msg_len - sizeof(struct ds_msg_tag);
+
+ mutex_lock(&ds_var_mutex);
+
+ spin_lock_irqsave(&ds_lock, flags);
+ ds_var_doorbell = 0;
+ ds_var_response = -1;
+
+ ds_send(dp->lp, &pkt, msg_len);
+ spin_unlock_irqrestore(&ds_lock, flags);
+
+ loops = 1000;
+ while (ds_var_doorbell == 0) {
+ if (loops-- < 0)
+ break;
+ barrier();
+ udelay(100);
+ }
+
+ mutex_unlock(&ds_var_mutex);
+
+ if (ds_var_doorbell == 0 ||
+ ds_var_response != DS_VAR_SUCCESS)
+ printk(KERN_ERR PFX "var-config [%s:%s] "
+ "failed, response(%d).\n",
+ var, value,
+ ds_var_response);
+ } else {
+ printk(KERN_ERR PFX "var-config not registered so "
+ "could not set (%s) variable to (%s).\n",
+ var, value);
+ }
+}
+
+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];
+
+ strcpy(full_boot_str, "boot ");
+ strcpy(full_boot_str + strlen("boot "), boot_command);
+
+ ldom_set_var("reboot-command", full_boot_str);
+ }
+ sun4v_mach_sir();
+}
+
static void ds_conn_reset(struct ds_info *dp)
{
printk(KERN_ERR PFX "ds_conn_reset() from %p\n",
@@ -594,6 +753,8 @@
if (err)
goto out_free_ldc;
+ ds_info = dp;
+
start_powerd();
return err;
diff --git a/arch/sparc64/prom/misc.c b/arch/sparc64/prom/misc.c
index f3e0c14..72d272c 100644
--- a/arch/sparc64/prom/misc.c
+++ b/arch/sparc64/prom/misc.c
@@ -14,6 +14,7 @@
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/system.h>
+#include <asm/ldc.h>
int prom_service_exists(const char *service_name)
{
@@ -37,6 +38,10 @@
/* Reset and reboot the machine with the command 'bcommand'. */
void prom_reboot(const char *bcommand)
{
+#ifdef CONFIG_SUN_LDOMS
+ if (ldom_domaining_enabled)
+ ldom_reboot(bcommand);
+#endif
p1275_cmd("boot", P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_INOUT(1, 0), bcommand);
}
diff --git a/arch/sparc64/prom/tree.c b/arch/sparc64/prom/tree.c
index 500f05e..17b7ecf 100644
--- a/arch/sparc64/prom/tree.c
+++ b/arch/sparc64/prom/tree.c
@@ -13,6 +13,7 @@
#include <asm/openprom.h>
#include <asm/oplib.h>
+#include <asm/ldc.h>
/* Return the child of node 'node' or zero if no this node has no
* direct descendent.
@@ -261,9 +262,17 @@
int
prom_setprop(int node, const char *pname, char *value, int size)
{
- if(size == 0) return 0;
- if((pname == 0) || (value == 0)) return 0;
+ if (size == 0)
+ return 0;
+ if ((pname == 0) || (value == 0))
+ return 0;
+#ifdef CONFIG_SUN_LDOMS
+ if (ldom_domaining_enabled) {
+ ldom_set_var(pname, value);
+ return 0;
+ }
+#endif
return p1275_cmd ("setprop", P1275_ARG(1,P1275_ARG_IN_STRING)|
P1275_ARG(2,P1275_ARG_IN_BUF)|
P1275_INOUT(4, 1),
diff --git a/include/asm-sparc64/ldc.h b/include/asm-sparc64/ldc.h
index 3c91f26..a21996c 100644
--- a/include/asm-sparc64/ldc.h
+++ b/include/asm-sparc64/ldc.h
@@ -4,6 +4,8 @@
#include <asm/hypervisor.h>
extern int ldom_domaining_enabled;
+extern void ldom_set_var(const char *var, const char *value);
+extern void ldom_reboot(const char *boot_command);
/* The event handler will be evoked when link state changes
* or data becomes available on the receive side.