[PATCH] arm64: zynqmp: Print the secure boot status information in EL3

[Jorge Ramirez-Ortiz]

Confirm the secure boot configuration on the console.

Signed-off-by: Jorge Ramirez-Ortiz <jorge at foundries.io>
---
 arch/arm/mach-zynqmp/include/mach/hardware.h |  3 ++-
 board/xilinx/zynqmp/zynqmp.c                 | 16 +++++++++++++++-
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-zynqmp/include/mach/hardware.h b/arch/arm/mach-zynqmp/include/mach/hardware.h
index 3776499070..3d3ffa086e 100644
--- a/arch/arm/mach-zynqmp/include/mach/hardware.h
+++ b/arch/arm/mach-zynqmp/include/mach/hardware.h
@@ -139,7 +139,8 @@ struct apu_regs {
 #define ZYNQMP_SILICON_VER_SHIFT	0
 
 struct csu_regs {
-	u32 reserved0[4];
+	u32 status;
+	u32 reserved0[3];
 	u32 multi_boot;
 	u32 reserved1[11];
 	u32 idcode;
diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
index 1748fec2e4..b7d11630d1 100644
--- a/board/xilinx/zynqmp/zynqmp.c
+++ b/board/xilinx/zynqmp/zynqmp.c
@@ -355,6 +355,18 @@ static int multi_boot(void)
 	return 0;
 }
 
+static void secure_boot(void)
+{
+	u32 status;
+
+	status = readl(&csu_base->status);
+	if (status & (BIT(0) | BIT(1))) {
+		printf("Secure Boot:\t%s%s\n",
+		       status & BIT(0) ? "authenticated" : "not authenticated",
+		       status & BIT(1) ? ", encrypted" : ", not encrypted");
+	}
+}
+
 #define PS_SYSMON_ANALOG_BUS_VAL	0x3210
 #define PS_SYSMON_ANALOG_BUS_REG	0xFFA50914
 
@@ -391,8 +403,10 @@ int board_init(void)
 	fpga_add(fpga_xilinx, &zynqmppl);
 #endif
 
-	if (current_el() == 3)
+	if (current_el() == 3) {
 		multi_boot();
+		secure_boot();
+	}
 
 	return 0;
 }
-- 
2.31.1