[PATCH v3 0/4] remoteproc: add Cortex-A Core remoteproc support on i.MX platforms

[PATCH v3 0/4] remoteproc: add Cortex-A Core remoteproc support on i.MX platforms

[Jiafei Pan]

This patch series is to add remoteproc support on Cortex-A Core of i.MX platforms:
1. Adding dts binding for Cortex-A Core remoteproc
2. Enable Cortex-A Core remoteproc support in remoteproc driver
3. Adding dts example on imx93 platforms.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>

---
Changes in v3:
- Fixed dt_binding_check warnings
- Updated prefix of patch subject

Changes in v2:
- Update arch/arm64/boot/dts/freescale/Makefile to add new dts

---
Hou Zhiqiang (1):
  remoteproc: imx_rproc: add autoboot support for A-core

Jiafei Pan (3):
  dt-bindings: remoteproc: add imx-rproc-psci
  remoteproc: imx_rproc: add support for Cortex-A Core
  arm64: dts: imx93: Cortex-A Core remoteproc device node

 .../remoteproc/fsl,imx-rproc-psci.yaml        |  51 ++++++
 arch/arm64/boot/dts/freescale/Makefile        |   2 +
 .../imx93-11x11-evk-multicore-rtos.dts        |  39 +++++
 .../imx93-14x14-evk-multicore-rtos.dts        |  39 +++++
 .../boot/dts/freescale/imx93-rproc-ca55.dtsi  |  14 ++
 drivers/remoteproc/imx_rproc.c                | 150 ++++++++++++++++++
 drivers/remoteproc/imx_rproc.h                |   2 +
 7 files changed, 297 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml
 create mode 100644 arch/arm64/boot/dts/freescale/imx93-11x11-evk-multicore-rtos.dts
 create mode 100644 arch/arm64/boot/dts/freescale/imx93-14x14-evk-multicore-rtos.dts
 create mode 100644 arch/arm64/boot/dts/freescale/imx93-rproc-ca55.dtsi

-- 
2.43.0

[PATCH v3 1/4] dt-bindings: remoteproc: add imx-rproc-psci

[Jiafei Pan]

Add compatible string "fsl,imx-rproc-psci" for i.MX Cortex-A Core's
remoteproc support.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>

---
Changes in v3:
- Fixed dt_binding_check warnings

---
 .../remoteproc/fsl,imx-rproc-psci.yaml        | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml

diff --git a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml
new file mode 100644
index 000000000000..28d00dbf8bc7
--- /dev/null
+++ b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/remoteproc/fsl,imx-rproc-psci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX Cortex-A Core Remote Processor via PSCI
+
+maintainers:
+  - Jiafei Pan <Jiafei.Pan@nxp.com>
+
+description:
+  This binding provides support for managing Cortex-A cores as remote
+  processors on i.MX platforms using the PSCI (Power State Coordination
+  Interface) for CPU power management operations. This allows single
+  Cortex-A core or multiple Cortex-A cores to be controlled by Linux as
+  a remote processor, enabling them to run RTOS or bare-metal applications.
+
+properties:
+  compatible:
+    const: fsl,imx-rproc-psci
+
+  fsl,cpus-mask:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Bitmask indicating which CPU cores are assigned to this remote
+      processor instance. Each bit represents a CPU core, where bit N
+      corresponds to CPU N. For example, 0x2 (0b10) assigns CPU core 1,
+      while 0x6 (0b110) assigns CPU cores 1 and 2.
+
+  memory-region:
+    maxItems: 1
+    description:
+      Phandle to a reserved memory region to be used for the remote
+      processor's code and data.
+
+required:
+  - compatible
+  - fsl,cpus-mask
+  - memory-region
+
+additionalProperties: false
+
+examples:
+  - |
+        remoteproc-ca55-1 {
+            compatible = "fsl,imx-rproc-psci";
+            /* bitmask: 0b10, assign A55 Core 1 */
+            fsl,cpus-mask = <0x2>;
+            memory-region = <&rtos_ca55_reserved>;
+        };
-- 
2.43.0

[PATCH v3 2/4] remoteproc: imx_rproc: add support for Cortex-A Core

[Jiafei Pan]

Add Cortex-A Core remoteproc support, it use PSCI and SIP SMC call
to manage Cortex-A Core to be on or off.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
---

Changes in v3:
- Updated prefix of patch subject

---
 drivers/remoteproc/imx_rproc.c | 134 +++++++++++++++++++++++++++++++++
 drivers/remoteproc/imx_rproc.h |   2 +
 2 files changed, 136 insertions(+)

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 0dd80e688b0e..8a3de27c96b7 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -6,6 +6,7 @@
 #include <dt-bindings/firmware/imx/rsrc.h>
 #include <linux/arm-smccc.h>
 #include <linux/clk.h>
+#include <linux/cpu.h>
 #include <linux/err.h>
 #include <linux/firmware/imx/sci.h>
 #include <linux/firmware/imx/sm.h>
@@ -20,12 +21,17 @@
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
 #include <linux/pm_runtime.h>
+#include <linux/psci.h>
 #include <linux/reboot.h>
 #include <linux/regmap.h>
 #include <linux/remoteproc.h>
 #include <linux/scmi_imx_protocol.h>
 #include <linux/workqueue.h>
 
+#include <uapi/linux/psci.h>
+
+#include <asm/smp_plat.h>
+
 #include "imx_rproc.h"
 #include "remoteproc_internal.h"
 
@@ -72,6 +78,8 @@
 #define IMX_SIP_RPROC_STARTED		0x01
 #define IMX_SIP_RPROC_STOP		0x02
 
+#define IMX_SIP_CPU_OFF			0xC2000012
+
 #define IMX_SC_IRQ_GROUP_REBOOTED	5
 
 /**
@@ -131,6 +139,9 @@ struct imx_rproc {
 	 * BIT 0: IMX_RPROC_FLAGS_SM_LMM_CTRL(RPROC LM is under Linux control )
 	 */
 	u32				flags;
+	/* used by Cortex-A Core remoteproc to manage all CPU Cores */
+	cpumask_t			cpus;
+	cpumask_t			offlined_cpus;
 };
 
 static const struct imx_rproc_att imx_rproc_att_imx95_m7[] = {
@@ -381,6 +392,45 @@ static int imx_rproc_sm_lmm_start(struct rproc *rproc)
 	return 0;
 }
 
+static int imx_rproc_psci_start(struct rproc *rproc)
+{
+	struct imx_rproc *priv = rproc->priv;
+	struct device *dev = priv->dev;
+	unsigned int cpu;
+	int ret;
+
+	if (cpumask_empty(&priv->cpus)) {
+		dev_err(dev, "No CPU Core assigned!\n");
+		return -ENODEV;
+	}
+
+	for_each_cpu(cpu, &priv->cpus) {
+		if (cpu_online(cpu)) {
+			ret = remove_cpu(cpu);
+			if (ret)
+				goto err;
+			cpumask_set_cpu(cpu, &priv->offlined_cpus);
+		}
+	}
+
+	cpu = cpumask_first(&priv->cpus);
+	ret = psci_ops.cpu_on(cpu_logical_map(cpu), rproc->bootaddr);
+	if (ret) {
+		dev_err(dev, "Boot failed on CPU Core %d\n", cpu);
+		goto err;
+	}
+
+	return 0;
+
+err:
+	for_each_cpu(cpu, &priv->cpus) {
+		if (!cpu_online(cpu) && add_cpu(cpu) == 0)
+			cpumask_clear_cpu(cpu, &priv->offlined_cpus);
+	}
+
+	return ret;
+}
+
 static int imx_rproc_start(struct rproc *rproc)
 {
 	struct imx_rproc *priv = rproc->priv;
@@ -456,6 +506,50 @@ static int imx_rproc_sm_lmm_stop(struct rproc *rproc)
 	return scmi_imx_lmm_operation(dcfg->lmid, SCMI_IMX_LMM_SHUTDOWN, 0);
 }
 
+static int imx_rproc_psci_stop(struct rproc *rproc)
+{
+	struct imx_rproc *priv = rproc->priv;
+	struct device *dev = priv->dev;
+	struct arm_smccc_res res;
+	unsigned int cpu;
+	unsigned long start, end;
+	int err;
+
+	for_each_cpu(cpu, &priv->cpus) {
+		/* Check CPU status */
+		err = psci_ops.affinity_info(cpu_logical_map(cpu), 0);
+		if (err == PSCI_0_2_AFFINITY_LEVEL_OFF)
+			continue;
+
+		/* Bring CPU to be off */
+		arm_smccc_smc(IMX_SIP_CPU_OFF, cpu, 0,
+			0, 0, 0, 0, 0, &res);
+		start = jiffies;
+		end = start + msecs_to_jiffies(100);
+		do {
+			err = psci_ops.affinity_info(cpu_logical_map(cpu), 0);
+			if (err == PSCI_0_2_AFFINITY_LEVEL_OFF) {
+				pr_info("CPU%d is killed (polled %d ms)\n", cpu,
+					jiffies_to_msecs(jiffies - start));
+				break;
+			}
+
+			usleep_range(100, 1000);
+		} while (time_before(jiffies, end));
+	}
+
+	/* Return back freed CPU Core to Linux kernel */
+	for_each_cpu(cpu, &priv->cpus) {
+		if (cpumask_test_cpu(cpu, &priv->offlined_cpus)) {
+			if (add_cpu(cpu) != 0)
+				dev_err(dev, "Failed to bring CPU %d back to be online", cpu);
+			cpumask_clear_cpu(cpu, &priv->offlined_cpus);
+		}
+	}
+
+	return 0;
+}
+
 static int imx_rproc_stop(struct rproc *rproc)
 {
 	struct imx_rproc *priv = rproc->priv;
@@ -480,6 +574,12 @@ static int imx_rproc_da_to_sys(struct imx_rproc *priv, u64 da,
 	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
 	int i;
 
+	/* No need to translate for Cortex-A Core */
+	if (dcfg->flags & IMX_RPROC_NO_ADDR_TRANS) {
+		*sys = da;
+		return 0;
+	}
+
 	/* parse address translation table */
 	for (i = 0; i < dcfg->att_size; i++) {
 		const struct imx_rproc_att *att = &dcfg->att[i];
@@ -1184,6 +1284,13 @@ static int imx_rproc_sm_detect_mode(struct rproc *rproc)
 	return imx_rproc_sm_lmm_check(rproc, started);
 }
 
+static int imx_rproc_psci_detect_mode(struct rproc *rproc)
+{
+	rproc->state = RPROC_OFFLINE;
+
+	return 0;
+}
+
 static int imx_rproc_detect_mode(struct imx_rproc *priv)
 {
 	/*
@@ -1228,6 +1335,8 @@ static int imx_rproc_probe(struct platform_device *pdev)
 	struct imx_rproc *priv;
 	struct rproc *rproc;
 	const struct imx_rproc_dcfg *dcfg;
+	unsigned int cpus;
+	unsigned long cpus_bits;
 	int ret;
 
 	/* set some other name then imx */
@@ -1274,6 +1383,17 @@ static int imx_rproc_probe(struct platform_device *pdev)
 	if (ret)
 		return dev_err_probe(dev, ret, "failed on imx_rproc_addr_init\n");
 
+	ret = of_property_read_u32(dev->of_node, "fsl,cpus-bits", &cpus);
+	if (ret) {
+		cpumask_clear(&priv->cpus);
+	} else {
+		cpus_bits = cpus;
+		bitmap_copy(cpumask_bits(&priv->cpus), &cpus_bits,
+				min((unsigned int)nr_cpumask_bits,
+				    (unsigned int)sizeof(unsigned long)));
+		rproc->auto_boot = false;
+	}
+
 	ret = imx_rproc_detect_mode(priv);
 	if (ret)
 		return dev_err_probe(dev, ret, "failed on detect mode\n");
@@ -1372,6 +1492,12 @@ static const struct imx_rproc_plat_ops imx_rproc_ops_sm_cpu = {
 	.stop		= imx_rproc_sm_cpu_stop,
 };
 
+static const struct imx_rproc_plat_ops imx_rproc_ops_psci = {
+	.start		= imx_rproc_psci_start,
+	.stop		= imx_rproc_psci_stop,
+	.detect_mode	= imx_rproc_psci_detect_mode,
+};
+
 static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mn_mmio = {
 	.src_reg	= IMX7D_SRC_SCR,
 	.src_mask	= IMX7D_M4_RST_MASK,
@@ -1464,6 +1590,13 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx95_m7 = {
 	.lmid		= 1, /* Use 1 as Logical Machine ID where M7 resides */
 };
 
+static const struct imx_rproc_dcfg imx_rproc_cfg_psci = {
+	.att		= NULL,
+	.att_size	= 0,
+	.ops		= &imx_rproc_ops_psci,
+	.flags		= IMX_RPROC_NO_ADDR_TRANS,
+};
+
 static const struct of_device_id imx_rproc_of_match[] = {
 	{ .compatible = "fsl,imx7ulp-cm4", .data = &imx_rproc_cfg_imx7ulp },
 	{ .compatible = "fsl,imx7d-cm4", .data = &imx_rproc_cfg_imx7d },
@@ -1479,6 +1612,7 @@ static const struct of_device_id imx_rproc_of_match[] = {
 	{ .compatible = "fsl,imx8ulp-cm33", .data = &imx_rproc_cfg_imx8ulp },
 	{ .compatible = "fsl,imx93-cm33", .data = &imx_rproc_cfg_imx93 },
 	{ .compatible = "fsl,imx95-cm7", .data = &imx_rproc_cfg_imx95_m7 },
+	{ .compatible = "fsl,imx-rproc-psci", .data = &imx_rproc_cfg_psci },
 	{},
 };
 MODULE_DEVICE_TABLE(of, imx_rproc_of_match);
diff --git a/drivers/remoteproc/imx_rproc.h b/drivers/remoteproc/imx_rproc.h
index d37e6f90548c..be6709971042 100644
--- a/drivers/remoteproc/imx_rproc.h
+++ b/drivers/remoteproc/imx_rproc.h
@@ -18,6 +18,8 @@ struct imx_rproc_att {
 /* dcfg flags */
 #define IMX_RPROC_NEED_SYSTEM_OFF	BIT(0)
 #define IMX_RPROC_NEED_CLKS		BIT(1)
+/* No need address translation */
+#define IMX_RPROC_NO_ADDR_TRANS		BIT(2)
 
 struct imx_rproc_plat_ops {
 	int (*start)(struct rproc *rproc);
-- 
2.43.0

[PATCH v3 3/4] remoteproc: imx_rproc: add autoboot support for A-core

[Jiafei Pan]

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

Add autoboot support for Cortex-A Core remoteproc.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
---

Changes in v3:
- Added my signed-of-by.

---
 drivers/remoteproc/imx_rproc.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 8a3de27c96b7..e8d239bef5c9 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -1286,7 +1286,24 @@ static int imx_rproc_sm_detect_mode(struct rproc *rproc)
 
 static int imx_rproc_psci_detect_mode(struct rproc *rproc)
 {
-	rproc->state = RPROC_OFFLINE;
+	struct imx_rproc *priv = rproc->priv;
+	unsigned int cpu;
+	int cpu_aff;
+
+	rproc->state = RPROC_DETACHED;
+	for_each_cpu(cpu, &priv->cpus) {
+		cpu_aff = psci_ops.affinity_info(cpu_logical_map(cpu), 0);
+		if (cpu_aff == PSCI_0_2_AFFINITY_LEVEL_OFF) {
+			rproc->state = RPROC_OFFLINE;
+			break;
+		}
+
+		/* in psci on state but running Linux */
+		if (cpu_online(cpu)) {
+			rproc->state = RPROC_OFFLINE;
+			break;
+		}
+	}
 
 	return 0;
 }
@@ -1391,7 +1408,6 @@ static int imx_rproc_probe(struct platform_device *pdev)
 		bitmap_copy(cpumask_bits(&priv->cpus), &cpus_bits,
 				min((unsigned int)nr_cpumask_bits,
 				    (unsigned int)sizeof(unsigned long)));
-		rproc->auto_boot = false;
 	}
 
 	ret = imx_rproc_detect_mode(priv);
-- 
2.43.0

[PATCH v3 4/4] arm64: dts: imx93: Cortex-A Core remoteproc device node

[Jiafei Pan]

Create device tree for i.MX93 14x14 evk and 11x11 evk, add Cortex-A Core
remoteproc device nodes in these device tree.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
---
 arch/arm64/boot/dts/freescale/Makefile        |  2 +
 .../imx93-11x11-evk-multicore-rtos.dts        | 39 +++++++++++++++++++
 .../imx93-14x14-evk-multicore-rtos.dts        | 39 +++++++++++++++++++
 .../boot/dts/freescale/imx93-rproc-ca55.dtsi  | 14 +++++++
 4 files changed, 94 insertions(+)
 create mode 100644 arch/arm64/boot/dts/freescale/imx93-11x11-evk-multicore-rtos.dts
 create mode 100644 arch/arm64/boot/dts/freescale/imx93-14x14-evk-multicore-rtos.dts
 create mode 100644 arch/arm64/boot/dts/freescale/imx93-rproc-ca55.dtsi

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 711e36cc2c99..f067e5c44dae 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -460,12 +460,14 @@ dtb-$(CONFIG_ARCH_MXC) += imx93-9x9-qsb-i3c.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-9x9-qsb-ontat-kd50g21-40nt-a1.dtb
 
 dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-evk.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-evk-multicore-rtos.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-frdm.dtb
 
 imx93-11x11-frdm-pixpaper-dtbs += imx93-11x11-frdm.dtb imx93-11x11-frdm-pixpaper.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-frdm-pixpaper.dtb
 
 dtb-$(CONFIG_ARCH_MXC) += imx93-14x14-evk.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx93-14x14-evk-multicore-rtos.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-kontron-bl-osm-s.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-phyboard-nash.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-phyboard-segin.dtb
diff --git a/arch/arm64/boot/dts/freescale/imx93-11x11-evk-multicore-rtos.dts b/arch/arm64/boot/dts/freescale/imx93-11x11-evk-multicore-rtos.dts
new file mode 100644
index 000000000000..9fb2b94b83b4
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx93-11x11-evk-multicore-rtos.dts
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright 2023-2026 NXP
+ */
+
+/dts-v1/;
+#include "imx93-11x11-evk.dts"
+#include "imx93-rproc-ca55.dtsi"
+
+/ {
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		/*
+		 * Reserve up to 16MB for one possible RTOS instances running on
+		 * one Cortex-A Cores when booting Linux on at least one Cortex-A Core.
+		 */
+		rtos_ca55_reserved: rtos-ca55@d0000000 {
+			no-map;
+			reg = <0 0xd0000000 0x0 0x1000000>;
+		};
+
+		/* Reserve 16MB for FreeRTOS on M33 */
+		m33_reserved: m33@a5000000 {
+			no-map;
+			reg = <0 0xa5000000 0 0x1000000>;
+		};
+	};
+};
+
+&lpuart2 {
+	status = "disabled";
+};
+
+&clk {
+	init-on-array = <IMX93_CLK_LPUART2_GATE>;
+};
diff --git a/arch/arm64/boot/dts/freescale/imx93-14x14-evk-multicore-rtos.dts b/arch/arm64/boot/dts/freescale/imx93-14x14-evk-multicore-rtos.dts
new file mode 100644
index 000000000000..b2481bf19b4a
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx93-14x14-evk-multicore-rtos.dts
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright 2024-2026 NXP
+ */
+
+/dts-v1/;
+#include "imx93-14x14-evk.dts"
+#include "imx93-rproc-ca55.dtsi"
+
+/ {
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		/*
+		 * Reserve up to 16MB for one possible RTOS instances running on
+		 * one Cortex-A Cores when booting Linux on at least one Cortex-A Core.
+		 */
+		rtos_ca55_reserved: rtos-ca55@d0000000 {
+			no-map;
+			reg = <0 0xd0000000 0x0 0x1000000>;
+		};
+
+		/* Reserve 16MB for FreeRTOS on M33 */
+		m33_reserved: m33@a5000000 {
+			no-map;
+			reg = <0 0xa5000000 0 0x1000000>;
+		};
+	};
+};
+
+&lpuart2 {
+	status = "disabled";
+};
+
+&clk {
+	init-on-array = <IMX93_CLK_LPUART2_GATE>;
+};
diff --git a/arch/arm64/boot/dts/freescale/imx93-rproc-ca55.dtsi b/arch/arm64/boot/dts/freescale/imx93-rproc-ca55.dtsi
new file mode 100644
index 000000000000..549a9e762d6a
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx93-rproc-ca55.dtsi
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright 2024-2026 NXP
+ */
+
+/ {
+	ca55_1: remoteproc-ca55-1 {
+		compatible = "fsl,imx-rproc-psci";
+		/* bitmask:0b10, assign A55 Core 1 */
+		fsl,cpus-mask = <0x2>;
+		memory-region = <&rtos_ca55_reserved>;
+	};
+};
+
-- 
2.43.0

Re: [PATCH v3 0/4] remoteproc: add Cortex-A Core remoteproc support on i.MX platforms

[Peng Fan]

Hi Jiafei,

On Mon, May 11, 2026 at 10:39:24AM +0800, Jiafei Pan wrote:
>This patch series is to add remoteproc support on Cortex-A Core of i.MX platforms:
>1. Adding dts binding for Cortex-A Core remoteproc
>2. Enable Cortex-A Core remoteproc support in remoteproc driver
>3. Adding dts example on imx93 platforms.

Normally, we only keep one patch or patch series from the same author that
modifies the same file in the review queue at a time.

You already have a patch for imx_rproc.c currently under review(got R-b, but
need Mathieu to handle), so this patch series might be delayed to be reviewed.

As I have replied in internal, to make multiple OS run on Cortex-A SMP without
hypervsior, some GIC changes are required, without those GIC changes,
this patchset is not testable using upstream tree.

Thanks,
Peng

>
>Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
>
>---
>Changes in v3:
>- Fixed dt_binding_check warnings
>- Updated prefix of patch subject
>
>Changes in v2:
>- Update arch/arm64/boot/dts/freescale/Makefile to add new dts
>
>---
>Hou Zhiqiang (1):
>  remoteproc: imx_rproc: add autoboot support for A-core
>
>Jiafei Pan (3):
>  dt-bindings: remoteproc: add imx-rproc-psci
>  remoteproc: imx_rproc: add support for Cortex-A Core
>  arm64: dts: imx93: Cortex-A Core remoteproc device node
>
> .../remoteproc/fsl,imx-rproc-psci.yaml        |  51 ++++++
> arch/arm64/boot/dts/freescale/Makefile        |   2 +
> .../imx93-11x11-evk-multicore-rtos.dts        |  39 +++++
> .../imx93-14x14-evk-multicore-rtos.dts        |  39 +++++
> .../boot/dts/freescale/imx93-rproc-ca55.dtsi  |  14 ++
> drivers/remoteproc/imx_rproc.c                | 150 ++++++++++++++++++
> drivers/remoteproc/imx_rproc.h                |   2 +
> 7 files changed, 297 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc-psci.yaml
> create mode 100644 arch/arm64/boot/dts/freescale/imx93-11x11-evk-multicore-rtos.dts
> create mode 100644 arch/arm64/boot/dts/freescale/imx93-14x14-evk-multicore-rtos.dts
> create mode 100644 arch/arm64/boot/dts/freescale/imx93-rproc-ca55.dtsi
>
>-- 
>2.43.0
>