powernv/opal: Notifier for OPAL events
This patch implements a notifier to receive a notification on OPAL
event mask changes. The notifier is only called as a result of an OPAL
interrupt, which will happen upon reception of FSP messages or PCI errors.
Any event mask change detected as a result of opal_poll_events() will not
result in a notifier call.
[benh: changelog]
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index 2880797..029fe85 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -644,6 +644,11 @@
extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
int depth, void *data);
+extern int opal_notifier_register(struct notifier_block *nb);
+extern void opal_notifier_enable(void);
+extern void opal_notifier_disable(void);
+extern void opal_notifier_update_evt(uint64_t evt_mask, uint64_t evt_val);
+
extern int opal_get_chars(uint32_t vtermno, char *buf, int count);
extern int opal_put_chars(uint32_t vtermno, const char *buf, int total_len);