diff -u aacraid-1.2.1/aachba.c aacraid-1.2.1-patched/aachba.c
--- aacraid-1.2.1/aachba.c	2024-09-30 22:55:22.000000000 +0900
+++ aacraid-1.2.1-patched/aachba.c	2025-02-23 22:57:22.879818201 +0900
@@ -328,6 +328,12 @@
 	"\t1 - Array Meta Data Signature (default)\n"
 	"\t2 - Adapter Serial Number");
 
+int aac_cpu_offline_feature;
+module_param_named(aac_cpu_offline_feature, aac_cpu_offline_feature, int, 0644);
+MODULE_PARM_DESC(aac_cpu_offline_feature,
+	"This enables CPU offline feature and may result in IO performance drop in some cases:\n"
+	"\t0 - Disable (default)\n"
+	"\t1 - Enable");
 
 static inline int aac_valid_context(struct scsi_cmnd *scsicmd,
 		struct fib *fibptr) {
diff -u aacraid-1.2.1/aacraid.h aacraid-1.2.1-patched/aacraid.h
--- aacraid-1.2.1/aacraid.h	2024-09-30 22:55:22.000000000 +0900
+++ aacraid-1.2.1-patched/aacraid.h	2025-02-23 22:57:22.879818201 +0900
@@ -1677,6 +1677,7 @@
 	u32			handle_pci_error;
 	bool			init_reset;
 	u8			soft_reset_support;
+	u8			use_map_queue;
 };
 
 #define aac_adapter_interrupt(dev) \
@@ -2769,4 +2770,5 @@
 extern int check_interval;
 extern int aac_check_reset;
 extern int aac_fib_dump;
+extern int aac_cpu_offline_feature;
 #endif
diff -u aacraid-1.2.1/commsup.c aacraid-1.2.1-patched/commsup.c
--- aacraid-1.2.1/commsup.c	2024-09-30 22:55:22.000000000 +0900
+++ aacraid-1.2.1-patched/commsup.c	2025-02-23 22:58:57.000000000 +0900
@@ -223,8 +223,14 @@
 struct fib *aac_fib_alloc_tag(struct aac_dev *dev, struct scsi_cmnd *scmd)
 {
 	struct fib *fibptr;
-
-	fibptr = &dev->fibs[scmd->request->tag];
+    u32 blk_tag;
+    int i;
+    if (aac_cpu_offline_feature == 1) {
+            blk_tag = blk_mq_unique_tag(scmd->request);
+            i = blk_mq_unique_tag_to_tag(blk_tag);
+            fibptr = &dev->fibs[i];
+    } else
+          fibptr = &dev->fibs[scmd->request->tag];
 	/*
 	 *	Null out fields that depend on being zero at the start of
 	 *	each I/O
diff -u aacraid-1.2.1/linit.c aacraid-1.2.1-patched/linit.c
--- aacraid-1.2.1/linit.c	2024-09-30 22:55:22.000000000 +0900
+++ aacraid-1.2.1-patched/linit.c	2025-02-23 23:01:04.000000000 +0900
@@ -507,6 +507,23 @@
 }
 
 /**
+ *	aac_map_queues - Map hardware queues for the SCSI host
+ *	@shost: SCSI host structure
+ *
+ *	Maps the default hardware queue for the given SCSI host to the
+ *	corresponding PCI device and enables mapped queue usage.
+ */
+
+static void aac_map_queues(struct Scsi_Host *shost)
+{
+	struct aac_dev *aac = (struct aac_dev *)shost->hostdata;
+
+	blk_mq_map_hw_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT],
+				&aac->pdev->dev, 0);
+	aac->use_map_queue = true;
+}
+
+/**
  *	aac_change_queue_depth		-	alter queue depths
  *	@sdev:	SCSI device we are considering
  *	@depth:	desired queue depth
@@ -1485,6 +1502,7 @@
 	.bios_param			= aac_biosparm,
 	.shost_attrs			= aac_attrs,
 	.slave_configure		= aac_slave_configure,
+	.map_queues			= aac_map_queues,
 	.change_queue_depth		= aac_change_queue_depth,
 	.sdev_attrs			= aac_dev_attrs,
 	.eh_abort_handler		= aac_eh_abort,
@@ -1771,6 +1789,11 @@
 	shost->max_lun = AAC_MAX_LUN;
 
 	pci_set_drvdata(pdev, shost);
+	if (aac_cpu_offline_feature == 1) {
+		shost->nr_hw_queues = aac->max_msix;
+		shost->can_queue    = aac->vector_cap;
+		shost->host_tagset = 1;
+	}
 
 	error = scsi_add_host(shost, &pdev->dev);
 	if (error)
@@ -1902,6 +1925,7 @@
 	struct aac_dev *aac = (struct aac_dev *)shost->hostdata;
 
 	aac_cancel_rescan_worker(aac);
+	aac->use_map_queue = false;
 	scsi_remove_host(shost);
 
 	__aac_shutdown(aac);
diff -u aacraid-1.2.1/src.c aacraid-1.2.1-patched/src.c
--- aacraid-1.2.1/src.c	2024-09-30 22:55:22.000000000 +0900
+++ aacraid-1.2.1-patched/src.c	2025-02-23 22:57:22.880818200 +0900
@@ -493,6 +493,10 @@
 #endif
 
 	u16 vector_no;
+	struct scsi_cmnd *scmd;
+	u32 blk_tag;
+	struct Scsi_Host *shost = dev->scsi_host_ptr;
+	struct blk_mq_queue_map *qmap;
 
 	atomic_inc(&q->numpending);
 
@@ -505,8 +509,28 @@
 		if ((dev->comm_interface == AAC_COMM_MESSAGE_TYPE3)
 			&& dev->sa_firmware)
 			vector_no = aac_get_vector(dev);
-		else
-			vector_no = fib->vector_no;
+		else {
+			if (aac_cpu_offline_feature == 1) {
+				if (!fib->vector_no || !fib->callback_data) {
+					if (shost && dev->use_map_queue) {
+						qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
+					vector_no = qmap->mq_map[raw_smp_processor_id()];
+					}
+					/*
+					 *	We hardcode the vector_no for
+					 *	reserved commands as a valid shost is
+					 *	absent during the init
+					 */
+					else
+						vector_no = 0;
+				} else {
+					scmd = (struct scsi_cmnd *)fib->callback_data;
+					blk_tag = blk_mq_unique_tag(scmd->request);
+					vector_no = blk_mq_unique_tag_to_hwq(blk_tag);
+				}
+			} else
+				vector_no = fib->vector_no;
+		}
 
 		if (native_hba) {
 			if (fib->flags & FIB_CONTEXT_FLAG_NATIVE_HBA_TMF) {
diff -u aacraid-1.2.1/src.c aacraid-1.2.1-patched/src.c
--- aacraid-1.2.1/src.c       2025-02-26 12:10:33.820406083 +0900
+++ aacraid-1.2.1-patched/src.c 2025-02-26 12:14:39.000000000 +0900
@@ -28,6 +28,7 @@
 #include <linux/time.h>
 #include <linux/interrupt.h>
 #include <scsi/scsi_host.h>
+#include <scsi/scsi_cmnd.h>

 #include "aacraid.h"