occ: Poll OCC throttle status and queue OCC events to host

Add a new class of message definition OPAL_MSG_OCC to
opal_message_type to notify the following OCC events to host:
1) OCC Reset
2) OCC Load
3) OCC Throttle Status Change

Add an opal poller to periodically read throttle status updated by OCC
for each chip and notify any change in throttle status to host. The
throttle status indicates the reason why OCC may have limited the max
Pstate of the chip.

Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Reviewed-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/chip.h b/include/chip.h
index 9cecace1..654d2e0b 100644
--- a/include/chip.h
+++ b/include/chip.h
@@ -148,6 +148,7 @@ struct proc_chip {
 	uint64_t		homer_size;
 	uint64_t		occ_common_base;
 	uint64_t		occ_common_size;
+	u8			throttle;
 
 	/* Must hold capi_lock to change */
 	u8			capp_phb3_attached_mask;