linux-kernel - [PATCH v8 08/11] arm64: dts: ti: k3-am62x-sk-common: Enable IPC with remote processors

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250502220325.3230653-9-jm@ti.com>
Date: Fri, 2 May 2025 17:03:22 -0500
From: Judith Mendez <jm@...com>
To: Judith Mendez <jm@...com>, Nishanth Menon <nm@...com>,
        Vignesh Raghavendra
	<vigneshr@...com>
CC: Tero Kristo <kristo@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof
 Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, Hari
 Nagalla <hnagalla@...com>,
        Beleswar Padhi <b-padhi@...com>,
        Markus
 Schneider-Pargmann <msp@...libre.com>,
        Andrew Davis <afd@...com>, Devarsh
 Thakkar <devarsht@...com>,
        <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v8 08/11] arm64: dts: ti: k3-am62x-sk-common: Enable IPC with remote processors

From: Hari Nagalla <hnagalla@...com>

For each remote proc, reserve memory for IPC and bind the mailbox
assignments. Two memory regions are reserved for each remote processor.
The first region of 1MB of memory is used for Vring shared buffers
and the second region is used as external memory to the remote processor
for the resource table and for tracebuffer allocations.

Signed-off-by: Devarsh Thakkar <devarsht@...com>
Signed-off-by: Hari Nagalla <hnagalla@...com>
Signed-off-by: Judith Mendez <jm@...com>
Acked-by: Andrew Davis <afd@...com>
---
 .../arm64/boot/dts/ti/k3-am62x-sk-common.dtsi | 34 ++++++++++++++++---
 1 file changed, 29 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
index 20d1437f253d..59aa09a0bf8e 100644
--- a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
@@ -70,6 +70,18 @@ mcu_m4fss_memory_region: m4f-memory@...00000 {
 			no-map;
 		};
 
+		wkup_r5fss0_core0_dma_memory_region: r5f-dma-memory@...00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0x9da00000 0x00 0x100000>;
+			no-map;
+		};
+
+		wkup_r5fss0_core0_memory_region: r5f-memory@...00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0x9db00000 0x00 0xc00000>;
+			no-map;
+		};
+
 		secure_tfa_ddr: tfa@...80000 {
 			reg = <0x00 0x9e780000 0x00 0x80000>;
 			alignment = <0x1000>;
@@ -82,11 +94,6 @@ secure_ddr: optee@...00000 {
 			no-map;
 		};
 
-		wkup_r5fss0_core0_dma_memory_region: r5f-dma-memory@...00000 {
-			compatible = "shared-dma-pool";
-			reg = <0x00 0x9db00000 0x00 0xc00000>;
-			no-map;
-		};
 	};
 
 	leds {
@@ -495,10 +502,17 @@ cpsw3g_phy0: ethernet-phy@0 {
 };
 
 &mailbox0_cluster0 {
+	status = "okay";
+
 	mbox_m4_0: mbox-m4-0 {
 		ti,mbox-rx = <0 0 0>;
 		ti,mbox-tx = <1 0 0>;
 	};
+
+	mbox_r5_0: mbox-r5-0 {
+		ti,mbox-rx = <2 0 0>;
+		ti,mbox-tx = <3 0 0>;
+	};
 };
 
 &mcu_m4fss {
@@ -508,6 +522,16 @@ &mcu_m4fss {
 	status = "okay";
 };
 
+&wkup_r5fss0 {
+	status = "okay";
+};
+
+&wkup_r5fss0_core0 {
+	mboxes = <&mailbox0_cluster0 &mbox_r5_0>;
+	memory-region = <&wkup_r5fss0_core0_dma_memory_region>,
+			<&wkup_r5fss0_core0_memory_region>;
+};
+
 &usbss0 {
 	bootph-all;
 	status = "okay";
-- 
2.49.0