static int __init register_perf_hsvc(void)
{
if (tlb_type == hypervisor) {
switch (sun4v_chip_type) {
case SUN4V_CHIP_NIAGARA1:
perf_hsvc_group = HV_GRP_NIAG_PERF;
break;
case SUN4V_CHIP_NIAGARA2:
perf_hsvc_group = HV_GRP_N2_CPU;
break;
default:
return -ENODEV;
}
perf_hsvc_major = 1;
perf_hsvc_minor = 0;
if (sun4v_hvapi_register(perf_hsvc_group,
perf_hsvc_major,
&perf_hsvc_minor)) {
printk("perfmon: Could not register hvapi.\n");
return -ENODEV;
}
}
return 0;
}
static int __init sstate_init(void)
{
unsigned long major, minor;
if (tlb_type != hypervisor)
return 0;
major = 1;
minor = 0;
if (sun4v_hvapi_register(HV_GRP_SOFT_STATE, major, &minor))
return 0;
hv_supports_soft_state = 1;
prom_sun4v_guest_soft_state();
do_set_sstate(HV_SOFT_STATE_TRANSITION, booting_msg);
atomic_notifier_chain_register(&panic_notifier_list,
&sstate_panic_block);
register_reboot_notifier(&sstate_reboot_notifier);
return 0;
}
static int __init sun4v_wdt_init(void)
{
struct mdesc_handle *handle;
u64 node;
const u64 *value;
int err = 0;
unsigned long major = 1, minor = 1;
/*
* There are 2 properties that can be set from the control
* domain for the watchdog.
* watchdog-resolution
* watchdog-max-timeout
*
* We can expect a handle to be returned otherwise something
* serious is wrong. Correct to return -ENODEV here.
*/
handle = mdesc_grab();
if (!handle)
return -ENODEV;
node = mdesc_node_by_name(handle, MDESC_NODE_NULL, "platform");
err = -ENODEV;
if (node == MDESC_NODE_NULL)
goto out_release;
/*
* This is a safe way to validate if we are on the right
* platform.
*/
if (sun4v_hvapi_register(HV_GRP_CORE, major, &minor))
goto out_hv_unreg;
/* Allow value of watchdog-resolution up to 1s (default) */
value = mdesc_get_property(handle, node, "watchdog-resolution", NULL);
err = -EINVAL;
if (value) {
if (*value == 0 ||
*value > WDT_DEFAULT_RESOLUTION_MS)
goto out_hv_unreg;
}
value = mdesc_get_property(handle, node, "watchdog-max-timeout", NULL);
if (value) {
/*
* If the property value (in ms) is smaller than
* min_timeout, return -EINVAL.
*/
if (*value < wdd.min_timeout * 1000)
goto out_hv_unreg;
/*
* If the property value is smaller than
* default max_timeout then set watchdog max_timeout to
* the value of the property in seconds.
*/
if (*value < wdd.max_timeout * 1000)
wdd.max_timeout = *value / 1000;
}
watchdog_init_timeout(&wdd, timeout, NULL);
watchdog_set_nowayout(&wdd, nowayout);
err = watchdog_register_device(&wdd);
if (err)
goto out_hv_unreg;
pr_info("initialized (timeout=%ds, nowayout=%d)\n",
wdd.timeout, nowayout);
mdesc_release(handle);
return 0;
out_hv_unreg:
sun4v_hvapi_unregister(HV_GRP_CORE);
out_release:
mdesc_release(handle);
return err;
}
