diff --git a/conf/machine/include/qcom-qcs8300.inc b/conf/machine/include/qcom-qcs8300.inc
index c35db27dc..1de527c78 100644
--- a/conf/machine/include/qcom-qcs8300.inc
+++ b/conf/machine/include/qcom-qcs8300.inc
@@ -18,4 +18,7 @@ MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS += " \
 
 MACHINE_EXTRA_RRECOMMENDS += " \
     packagegroup-qcom-boot-additional \
+    qcom-rtss-mailbox-dlkm \
+    qcom-rtss-mailbox-umd \
+    qcom-rtss-mailbox-umd-utils \
 "
diff --git a/conf/machine/include/qcom-qcs9100.inc b/conf/machine/include/qcom-qcs9100.inc
index 28c00b4f0..119d1edb2 100644
--- a/conf/machine/include/qcom-qcs9100.inc
+++ b/conf/machine/include/qcom-qcs9100.inc
@@ -14,6 +14,9 @@ MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS += " \
 
 MACHINE_EXTRA_RRECOMMENDS += " \
     packagegroup-qcom-boot-additional \
+    qcom-rtss-mailbox-dlkm \
+    qcom-rtss-mailbox-umd \
+    qcom-rtss-mailbox-umd-utils \
 "
 
 # Memory layout needed by the SPL FIT boot flow.
diff --git a/conf/machine/qcom-armv8a.conf b/conf/machine/qcom-armv8a.conf
index 8262eec64..d77b0a974 100644
--- a/conf/machine/qcom-armv8a.conf
+++ b/conf/machine/qcom-armv8a.conf
@@ -88,6 +88,9 @@ MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS += " \
 
 MACHINE_EXTRA_RRECOMMENDS += " \
     packagegroup-qcom-boot-additional \
+    qcom-rtss-mailbox-dlkm \
+    qcom-rtss-mailbox-umd \
+    qcom-rtss-mailbox-umd-utils \
 "
 
 # Modules and firmware for all supported machines
diff --git a/recipes-kernel/qcom-rtss-mailbox-module/qcom-rtss-mailbox-dlkm_1.0.0.bb b/recipes-kernel/qcom-rtss-mailbox-module/qcom-rtss-mailbox-dlkm_1.0.0.bb
new file mode 100644
index 000000000..970113c19
--- /dev/null
+++ b/recipes-kernel/qcom-rtss-mailbox-module/qcom-rtss-mailbox-dlkm_1.0.0.bb
@@ -0,0 +1,12 @@
+SUMMARY = "Qualcomm RTSS Mailbox Kernel Driver Module"
+DESCRIPTION = "Dynamically Loadable Kernel Module (DLKM) for RTSS mailbox communication. \
+Provides mailbox IPC communication between APSS and RTSS. \
+NOTICE / LIMITATIONS: this driver is still being upstreamed and its uAPI \
+(rtss_mailbox_uapi.h) is not yet frozen and may change before upstream \
+acceptance - see rtss-mailbox-kmd's README for details."
+
+require qcom-rtss-mailbox-module-common.inc
+
+inherit module
+
+COMPATIBLE_MACHINE = "qcs8300|qcs9100|qcom-armv8a"
diff --git a/recipes-kernel/qcom-rtss-mailbox-module/qcom-rtss-mailbox-module-common.inc b/recipes-kernel/qcom-rtss-mailbox-module/qcom-rtss-mailbox-module-common.inc
new file mode 100644
index 000000000..019a02482
--- /dev/null
+++ b/recipes-kernel/qcom-rtss-mailbox-module/qcom-rtss-mailbox-module-common.inc
@@ -0,0 +1,6 @@
+HOMEPAGE = "https://github.com/qualcomm-linux/rtss-mailbox-kmd"
+LICENSE = "GPL-2.0-only"
+LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=12f884d2ae1ff87c09e5b7ccc2c4ca7e"
+
+SRC_URI = "git://github.com/qualcomm-linux/rtss-mailbox-kmd.git;branch=rtss-mailbox-kernel.le.0.0;protocol=https;tag=v${PV}"
+SRCREV = "9ce7c2f1ad860beb86e922e62b14fdcd178e129f"
diff --git a/recipes-kernel/qcom-rtss-mailbox-module/qcom-rtss-mailbox-uapi-headers_1.0.0.bb b/recipes-kernel/qcom-rtss-mailbox-module/qcom-rtss-mailbox-uapi-headers_1.0.0.bb
new file mode 100644
index 000000000..b59bad749
--- /dev/null
+++ b/recipes-kernel/qcom-rtss-mailbox-module/qcom-rtss-mailbox-uapi-headers_1.0.0.bb
@@ -0,0 +1,18 @@
+SUMMARY = "Qualcomm RTSS Mailbox UAPI headers"
+DESCRIPTION = "IOCTL/struct definitions shared between the RTSS mailbox kernel \
+driver (rtss-mailbox-kmd) and userspace (rtss-mailbox-umd). Packaged \
+standalone so userspace can build against the UAPI without depending on \
+the kernel module recipe. \
+NOTICE / LIMITATIONS: this uAPI is not yet frozen and may change before \
+upstream acceptance - see rtss-mailbox-kmd's README for details."
+
+require qcom-rtss-mailbox-module-common.inc
+
+LICENSE = "GPL-2.0-only WITH Linux-syscall-note"
+
+do_configure[noexec] = "1"
+do_compile[noexec] = "1"
+
+do_install() {
+    oe_runmake headers_install INSTALL_HDR_PATH=${D}${exec_prefix}
+}
diff --git a/recipes-support/qcom-rtss-mailbox-umd/qcom-rtss-mailbox-umd_1.0.0.bb b/recipes-support/qcom-rtss-mailbox-umd/qcom-rtss-mailbox-umd_1.0.0.bb
new file mode 100644
index 000000000..7cf541afa
--- /dev/null
+++ b/recipes-support/qcom-rtss-mailbox-umd/qcom-rtss-mailbox-umd_1.0.0.bb
@@ -0,0 +1,19 @@
+SUMMARY = "Qualcomm RTSS Mailbox userspace middleware and tools"
+DESCRIPTION = "Userspace middleware libraries and utilities for RTSS mailbox \
+IPC communication between APSS and RTSS."
+HOMEPAGE = "https://github.com/qualcomm-linux/rtss-mailbox-umd"
+LICENSE = "BSD-3-Clause"
+LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=223037c4be0bfc6cf757035432adf983"
+
+SRC_URI = "git://github.com/qualcomm-linux/rtss-mailbox-umd.git;branch=rtss-mailbox-usr.le.0.0;protocol=https;tag=v${PV}"
+SRCREV = "667fbda29be9e4d09ff5dd1b35e8dfda17a6ed63"
+
+inherit cmake
+
+DEPENDS = "qcom-rtss-mailbox-uapi-headers glib-2.0"
+
+PACKAGE_BEFORE_PN += "${PN}-utils"
+
+RRECOMMENDS:${PN} += "kernel-module-rtss-mailbox"
+
+FILES:${PN}-utils = "${bindir}"