[nrf noup] mgmt: mcumgr: grp: img_mgmt: Add handling for QSPI XIP

Adds handling code to allow selecting the correct image slot when
using QSPI XIP in DirectXIP mode

Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>
(cherry picked from commit 5ad9110)

Author: nordicjm

subsys/mgmt/mcumgr/grp/img_mgmt/Kconfig

@@ -219,6 +219,14 @@ config MCUMGR_GRP_IMG_SLOT_INFO_HOOKS
 	  This will enable the slot info function hooks which can be used to add additional
 	  information to responses.
 
+config MCUMGR_GRP_IMG_QSPI_XIP_SPLIT_IMAGE
+	bool "QSPI XIP Split image mode"
+	depends on MCUBOOT_BOOTLOADER_MODE_DIRECT_XIP
+	help
+	  This option should not be selected by users and should automatically be selected by
+	  sysbuild if needed. This enables selecting the correct slot when running a QSPI XIP
+	  split image application in DirectXIP mode.
+
 module = MCUMGR_GRP_IMG
 module-str = mcumgr_grp_img
 source "subsys/logging/Kconfig.template.log_config"

subsys/mgmt/mcumgr/grp/img_mgmt/src/img_mgmt.c

@@ -235,6 +235,12 @@ int img_mgmt_active_slot(int image)
 	/* Multi image does not support DirectXIP or RAM load currently */
 #if CONFIG_MCUMGR_GRP_IMG_UPDATABLE_IMAGE_NUMBER > 1
 	slot = (image << 1);
+
+#if CONFIG_MCUMGR_GRP_IMG_QSPI_XIP_SPLIT_IMAGE
+	if (FIXED_PARTITION_IS_RUNNING_APP_PARTITION(slot1_partition)) {
+		slot += 1;
+	}
+#endif
 #elif defined(CONFIG_MCUBOOT_BOOTLOADER_MODE_RAM_LOAD)
 	/* RAM load requires querying bootloader */
 	int rc;