int __init opal_elog_init(void)
{
int rc = 0, irq;
/* ELOG not supported by firmware */
if (!opal_check_token(OPAL_ELOG_READ))
return -1;
elog_kset = kset_create_and_add("elog", NULL, opal_kobj);
if (!elog_kset) {
pr_warn("%s: failed to create elog kset\n", __func__);
return -1;
}
irq = opal_event_request(ilog2(OPAL_EVENT_ERROR_LOG_AVAIL));
if (!irq) {
pr_err("%s: Can't register OPAL event irq (%d)\n",
__func__, irq);
return irq;
}
rc = request_irq(irq, elog_event,
IRQ_TYPE_LEVEL_HIGH, "opal-elog", NULL);
if (rc) {
pr_err("%s: Can't request OPAL event irq (%d)\n",
__func__, rc);
return rc;
}
/* We are now ready to pull error logs from opal. */
if (opal_check_token(OPAL_ELOG_RESEND))
opal_resend_pending_logs();
return 0;
}
int __init opal_elog_init(void)
{
int rc = 0;
/* ELOG not supported by firmware */
if (!opal_check_token(OPAL_ELOG_READ))
return -1;
elog_kset = kset_create_and_add("elog", NULL, opal_kobj);
if (!elog_kset) {
pr_warn("%s: failed to create elog kset\n", __func__);
return -1;
}
rc = opal_notifier_register(&elog_nb);
if (rc) {
pr_err("%s: Can't register OPAL event notifier (%d)\n",
__func__, rc);
return rc;
}
/* We are now ready to pull error logs from opal. */
opal_resend_pending_logs();
return 0;
}
void __init opal_platform_dump_init(void)
{
int rc;
dump_kset = kset_create_and_add("dump", NULL, opal_kobj);
if (!dump_kset) {
pr_warn("%s: Failed to create dump kset\n", __func__);
return;
}
rc = sysfs_create_group(&dump_kset->kobj, &initiate_attr_group);
if (rc) {
pr_warn("%s: Failed to create initiate dump attr group\n",
__func__);
kobject_put(&dump_kset->kobj);
return;
}
rc = opal_notifier_register(&dump_nb);
if (rc) {
pr_warn("%s: Can't register OPAL event notifier (%d)\n",
__func__, rc);
return;
}
if (opal_check_token(OPAL_DUMP_RESEND))
opal_dump_resend_notification();
}
static int __init opal_register_exception_handlers(void)
{
#ifdef __BIG_ENDIAN__
u64 glue;
if (!(powerpc_firmware_features & FW_FEATURE_OPAL))
return -ENODEV;
/* Hookup some exception handlers except machine check. We use the
* fwnmi area at 0x7000 to provide the glue space to OPAL
*/
glue = 0x7000;
/*
* Check if we are running on newer firmware that exports
* OPAL_HANDLE_HMI token. If yes, then don't ask OPAL to patch
* the HMI interrupt and we catch it directly in Linux.
*
* For older firmware (i.e currently released POWER8 System Firmware
* as of today <= SV810_087), we fallback to old behavior and let OPAL
* patch the HMI vector and handle it inside OPAL firmware.
*
* For newer firmware (in development/yet to be released) we will
* start catching/handling HMI directly in Linux.
*/
if (!opal_check_token(OPAL_HANDLE_HMI)) {
pr_info("opal: Old firmware detected, OPAL handles HMIs.\n");
opal_register_exception_handler(
OPAL_HYPERVISOR_MAINTENANCE_HANDLER,
0, glue);
glue += 128;
}
opal_register_exception_handler(OPAL_SOFTPATCH_HANDLER, 0, glue);
#endif
return 0;
}
