diff --git a/qcom/kalama-oemvm.dtsi b/qcom/kalama-oemvm.dtsi
index 88853815..e7753af4 100644
--- a/qcom/kalama-oemvm.dtsi
+++ b/qcom/kalama-oemvm.dtsi
@@ -12,6 +12,12 @@
 		bootargs = "nokaslr log_buf_len=256K root=/dev/ram rw init=/init console=hvc0 loglevel=8";
 	};
 
+	reserved_memory: reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+	};
+
 	cpus {
 		#address-cells = <0x2>;
 		#size-cells = <0x0>;
@@ -74,8 +80,8 @@
 		memory {
 			#address-cells = <0x2>;
 			#size-cells = <0x0>;
-			base-address = <0x0 0xf8000000>;
-			size-min = <0x0 0x5000000>;    /* 80 MB */
+			base-address = <0x0 0xf8200000>;
+			size-min = <0x0 0x4efc000>;    /* 78 MB */
 		};
 
 		segments {
@@ -104,6 +110,34 @@
 				queue-depth = <0x00000008>;
 				qcom,label = <0x1>;
 			};
+
+			virtio-mmio@0 {
+				vdevice-type = "virtio-mmio";
+				generate = "/virtio-mmio";
+				peer-default;
+				vqs-num = <0x1>;
+				push-compatible = "virtio,mmio";
+				dma-coherent;
+				dma_base = <0x0 0x0>;
+				memory {
+					qcom,label = <0x13>;
+					#address-cells = <0x2>;
+					base = <0x0 0xFFEFC000>;
+				};
+			};
+
+			swiotlb-shm {
+				vdevice-type = "shm";
+				generate = "/swiotlb";
+				push-compatible = "swiotlb";
+				peer-default;
+				dma_base = <0x0 0x4000>;
+				memory {
+					qcom,label = <0x14>;
+					#address-cells = <0x2>;
+					base = <0x0 0xFFF00000>;
+				};
+			};
 		};
 	};
 
diff --git a/qcom/kalama.dtsi b/qcom/kalama.dtsi
index 7495311c..4b0a0702 100644
--- a/qcom/kalama.dtsi
+++ b/qcom/kalama.dtsi
@@ -565,7 +565,19 @@
 
 	oem_vm_mem: oem_vm_region@f8000000 {
 		no-map;
-		reg = <0x0 0xf8000000 0x0 0x5000000>;
+		reg = <0x0 0xf8000000 0x0 0x4efc000>;
+	};
+
+	oem_vm_vblk0_ring: oem_vm_vblk0_ring@fcefc000 {
+		no-map;
+		reg = <0x0 0xfcefc000 0x0 0x4000>;
+		gunyah-label = <0x13>;
+	};
+
+	oem_vm_swiotlb: oem_vm_swiotlb@fcf00000 {
+		no-map;
+		reg = <0x0 0xfcf00000 0x0 0x100000>;
+		gunyah-label = <0x14>;
 	};
 
 	hyp_ext_tags_mem: hyp_ext_tags_region@fd000000 {
@@ -2940,12 +2952,24 @@
 		shared-buffers = <&trust_ui_vm_vblk0_ring &trust_ui_vm_swiotlb>;
 	};
 
+	oem_vm: qcom,oem_vm@fcefc000 {
+		reg = <0xfcefc000 0x104000>;
+		vm_name = "oemvm";
+		shared-buffers = <&oem_vm_vblk0_ring &oem_vm_swiotlb>;
+	};
+
 	qcom,virtio_backend@0 {
 		compatible = "qcom,virtio_backend";
 		qcom,vm = <&trust_ui_vm>;
 		qcom,label = <0x11>;
 	};
 
+	qcom,virtio_backend@1 {
+		compatible = "qcom,virtio_backend";
+		qcom,vm = <&oem_vm>;
+		qcom,label = <0x13>;
+	};
+
 	llcc_pmu: llcc-pmu@24095000 {
 		compatible = "qcom,llcc-pmu-ver2";
 		reg = <0x24095000 0x300>;
diff --git a/qcom/waipio-oemvm.dtsi b/qcom/waipio-oemvm.dtsi
index 7c8a5df3..dcf55808 100644
--- a/qcom/waipio-oemvm.dtsi
+++ b/qcom/waipio-oemvm.dtsi
@@ -12,6 +12,12 @@
 		bootargs = "nokaslr log_buf_len=256K root=/dev/ram rw init=/init console=hvc0 loglevel=8";
 	};
 
+	reserved_memory: reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+	};
+
 	cpus {
 		#address-cells = <0x2>;
 		#size-cells = <0x0>;
@@ -73,7 +79,7 @@
 			#address-cells = <0x2>;
 			#size-cells = <0x0>;
 			base-address = <0x0 0xbb000000>;
-			size-min = <0x0 0x5000000>;    /* 122 MB */
+			size-min = <0x0 0x4efc000>;    /* 78 MB */
 		};
 
 		segments {
@@ -102,6 +108,34 @@
 				queue-depth = <0x00000008>;
 				qcom,label = <0x1>;
 			};
+
+			virtio-mmio@0 {
+				vdevice-type = "virtio-mmio";
+				generate = "/virtio-mmio";
+				peer-default;
+				vqs-num = <0x1>;
+				push-compatible = "virtio,mmio";
+				dma-coherent;
+				dma_base = <0x0 0x0>;
+				memory {
+					qcom,label = <0x13>;
+					#address-cells = <0x2>;
+					base = <0x0 0xFFEFC000>;
+				};
+			};
+
+			swiotlb-shm {
+				vdevice-type = "shm";
+				generate = "/swiotlb";
+				push-compatible = "swiotlb";
+				peer-default;
+				dma_base = <0x0 0x4000>;
+				memory {
+					qcom,label = <0x14>;
+					#address-cells = <0x2>;
+					base = <0x0 0xFFF00000>;
+				};
+			};
 		};
 	};
 
diff --git a/qcom/waipio.dtsi b/qcom/waipio.dtsi
index 5ab9bc6f..d5bbb48c 100644
--- a/qcom/waipio.dtsi
+++ b/qcom/waipio.dtsi
@@ -498,7 +498,19 @@
 
 	oem_vm_mem: oem_vm_region@bb000000 {
 		no-map;
-		reg = <0x0 0xbb000000 0x0 0x5000000>;
+		reg = <0x0 0xbb000000 0x0 0x4efc000>;
+	};
+
+	oem_vm_vblk0_ring: oem_vm_vblk0_ring@bfefc000 {
+		no-map;
+		reg = <0x0 0xbfefc000 0x0 0x4000>;
+		gunyah-label = <0x13>;
+	};
+
+	oem_vm_swiotlb: oem_vm_swiotlb@bff00000 {
+		no-map;
+		reg = <0x0 0xbff00000 0x0 0x100000>;
+		gunyah-label = <0x14>;
 	};
 
 	mte_mem: mte_region@c0000000 {
@@ -3355,12 +3367,24 @@
 		shared-buffers = <&trust_ui_vm_vblk0_ring &trust_ui_vm_swiotlb>;
 	};
 
+	oem_vm: qcom,oem_vm@bfefc000 {
+		reg = <0xbfefc000 0x104000>;
+		vm_name = "oemvm";
+		shared-buffers = <&oem_vm_vblk0_ring &oem_vm_swiotlb>;
+	};
+
 	qcom,virtio_backend@0 {
 		compatible = "qcom,virtio_backend";
 		qcom,vm = <&trust_ui_vm>;
 		qcom,label = <0x11>;
 	};
 
+	qcom,virtio_backend@1 {
+		compatible = "qcom,virtio_backend";
+		qcom,vm = <&oem_vm>;
+		qcom,label = <0x13>;
+	};
+
 	qcom,msm_gsi {
 		compatible = "qcom,msm_gsi";
 	};