[PATCH v2 4/4] hw/cxl/events: discard all event records during sanitation

[Hyeonggon Yoo <42.hyeyoo@gmail.com>]

Per spec 8.2.9.9.5.1 Sanitize (Opcode 4400h), sanitize command should
delete all event logs. Introduce cxl_discard_all_event_logs() and call
this in __do_sanitization().

Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
---
 hw/cxl/cxl-events.c         | 13 +++++++++++++
 hw/cxl/cxl-mailbox-utils.c  |  1 +
 include/hw/cxl/cxl_device.h |  1 +
 3 files changed, 15 insertions(+)

diff --git a/hw/cxl/cxl-events.c b/hw/cxl/cxl-events.c
index bee6dfaf14..837b18ab47 100644
--- a/hw/cxl/cxl-events.c
+++ b/hw/cxl/cxl-events.c
@@ -141,6 +141,19 @@ bool cxl_event_insert(CXLDeviceState *cxlds, CXLEventLogType log_type,
     return cxl_event_count(log) == 1;
 }
 
+void cxl_discard_all_event_records(CXLDeviceState *cxlds)
+{
+    CXLEventLogType log_type;
+    CXLEventLog *log;
+
+    for (log_type = 0; log_type < CXL_EVENT_TYPE_MAX; log_type++) {
+        log = &cxlds->event_logs[log_type];
+        while (!cxl_event_empty(log)) {
+            cxl_event_delete_head(cxlds, log_type, log);
+        }
+    }
+}
+
 CXLRetCode cxl_event_get_records(CXLDeviceState *cxlds, CXLGetEventPayload *pl,
                                  uint8_t log_type, int max_recs,
                                  size_t *len)
diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index efeb5f8174..2ade351d82 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -1150,6 +1150,7 @@ static void __do_sanitization(CXLType3Dev *ct3d)
             memset(lsa, 0, memory_region_size(mr));
         }
     }
+    cxl_discard_all_event_records(&ct3d->cxl_dstate);
 }
 
 /*
diff --git a/include/hw/cxl/cxl_device.h b/include/hw/cxl/cxl_device.h
index 5618061ebe..8f05dd9beb 100644
--- a/include/hw/cxl/cxl_device.h
+++ b/include/hw/cxl/cxl_device.h
@@ -604,6 +604,7 @@ CXLRetCode cxl_event_get_records(CXLDeviceState *cxlds, CXLGetEventPayload *pl,
                                  size_t *len);
 CXLRetCode cxl_event_clear_records(CXLDeviceState *cxlds,
                                    CXLClearEventPayload *pl);
+void cxl_discard_all_event_records(CXLDeviceState *cxlds);
 
 void cxl_event_irq_assert(CXLType3Dev *ct3d);
 
-- 
2.39.3