X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=include%2Fuapi%2Fmisc%2Fcxl.h;h=cbae529b7ce0999684c42d7906df3de3febdc209;hb=db8262787e82b5c0fa57bd9d676add187519a751;hp=8cd334f99ddcd44792ffc76ddc81946dfac918d5;hpb=c8d6a77b5850dbf910e68ffe2054a6503ee2af47;p=deliverable%2Flinux.git

diff --git a/include/uapi/misc/cxl.h b/include/uapi/misc/cxl.h
index 8cd334f99ddc..cbae529b7ce0 100644
--- a/include/uapi/misc/cxl.h
+++ b/include/uapi/misc/cxl.h
@@ -93,6 +93,7 @@ enum cxl_event_type {
 	CXL_EVENT_AFU_INTERRUPT = 1,
 	CXL_EVENT_DATA_STORAGE  = 2,
 	CXL_EVENT_AFU_ERROR     = 3,
+	CXL_EVENT_AFU_DRIVER    = 4,
 };
 
 struct cxl_event_header {
@@ -124,12 +125,28 @@ struct cxl_event_afu_error {
 	__u64 error;
 };
 
+struct cxl_event_afu_driver_reserved {
+	/*
+	 * Defines the buffer passed to the cxl driver by the AFU driver.
+	 *
+	 * This is not ABI since the event header.size passed to the user for
+	 * existing events is set in the read call to sizeof(cxl_event_header)
+	 * + sizeof(whatever event is being dispatched) and the user is already
+	 * required to use a 4K buffer on the read call.
+	 *
+	 * Of course the contents will be ABI, but that's up the AFU driver.
+	 */
+	size_t data_size;
+	u8 data[];
+};
+
 struct cxl_event {
 	struct cxl_event_header header;
 	union {
 		struct cxl_event_afu_interrupt irq;
 		struct cxl_event_data_storage fault;
 		struct cxl_event_afu_error afu_error;
+		struct cxl_event_afu_driver_reserved afu_driver_event;
 	};
 };