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diff --git a/sys/dev/nvme/nvme.h b/sys/dev/nvme/nvme.h
--- a/sys/dev/nvme/nvme.h
+++ b/sys/dev/nvme/nvme.h
@@ -237,6 +237,35 @@
#define NVME_CTRLR_DATA_MIC_ANAR_SHIFT (3)
#define NVME_CTRLR_DATA_MIC_ANAR_MASK (0x1)
+/** OAES - Optional Asynchronous Events Supported */
+/* supports Namespace Attribute Notices event */
+#define NVME_CTRLR_DATA_OAES_NS_ATTR_SHIFT (8)
+#define NVME_CTRLR_DATA_OAES_NS_ATTR_MASK (0x1)
+/* supports Firmware Activation Notices event */
+#define NVME_CTRLR_DATA_OAES_FW_ACTIVATE_SHIFT (9)
+#define NVME_CTRLR_DATA_OAES_FW_ACTIVATE_MASK (0x1)
+/* supports Asymmetric Namespace Access Change Notices event */
+#define NVME_CTRLR_DATA_OAES_ASYM_NS_CHANGE_SHIFT (11)
+#define NVME_CTRLR_DATA_OAES_ASYM_NS_CHANGE_MASK (0x1)
+/* supports Predictable Latency Event Aggregate Log Change Notices event */
+#define NVME_CTRLR_DATA_OAES_PREDICT_LATENCY_SHIFT (12)
+#define NVME_CTRLR_DATA_OAES_PREDICT_LATENCY_MASK (0x1)
+/* supports LBA Status Information Notices event */
+#define NVME_CTRLR_DATA_OAES_LBA_STATUS_SHIFT (13)
+#define NVME_CTRLR_DATA_OAES_LBA_STATUS_MASK (0x1)
+/* supports Endurance Group Event Aggregate Log Page Changes Notices event */
+#define NVME_CTRLR_DATA_OAES_ENDURANCE_GROUP_SHIFT (14)
+#define NVME_CTRLR_DATA_OAES_ENDURANCE_GROUP_MASK (0x1)
+/* supports Normal NVM Subsystem Shutdown event */
+#define NVME_CTRLR_DATA_OAES_NORMAL_SHUTDOWN_SHIFT (15)
+#define NVME_CTRLR_DATA_OAES_NORMAL_SHUTDOWN_MASK (0x1)
+/* supports Zone Descriptor Changed Notices event */
+#define NVME_CTRLR_DATA_OAES_ZONE_DESC_CHANGE_SHIFT (27)
+#define NVME_CTRLR_DATA_OAES_ZONE_DESC_CHANGE_MASK (0x1)
+/* supports Discovery Log Page Change Notification event */
+#define NVME_CTRLR_DATA_OAES_LOG_PAGE_CHANGE_SHIFT (31)
+#define NVME_CTRLR_DATA_OAES_LOG_PAGE_CHANGE_MASK (0x1)
+
/** OACS - optional admin command support */
/* supports security send/receive commands */
#define NVME_CTRLR_DATA_OACS_SECURITY_SHIFT (0)
@@ -533,6 +562,9 @@
#define NVME_SS_PAGE_SSTAT_GDE_SHIFT (8)
#define NVME_SS_PAGE_SSTAT_GDE_MASK (0x1)
+/* Helper macro to combine *_MASK and *_SHIFT defines */
+#define NVMEB(name) (name##_MASK << name##_SHIFT)
+
/* CC register SHN field values */
enum shn_value {
NVME_SHN_NORMAL = 0x1,

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