arm64: zynqmp: Print the secure boot status information

Output the secure boot configuration to the console.

Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
Link: https://lore.kernel.org/r/20211013170447.10414-1-jorge@foundries.io
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/arch/arm/mach-zynqmp/include/mach/hardware.h b/arch/arm/mach-zynqmp/include/mach/hardware.h
index e6a3ee4..a70d6d6 100644 (file)
--- a/arch/arm/mach-zynqmp/include/mach/hardware.h
+++ b/arch/arm/mach-zynqmp/include/mach/hardware.h
@@ -152,8 +152,12 @@ struct apu_regs {
 #define CSU_JTAG_CHAIN_WR_SETUP                GENMASK(1, 0)
 #define CSU_PCAP_PROG_RELEASE_PL       BIT(0)
 
+#define ZYNQMP_CSU_STATUS_AUTHENTICATED        BIT(0)
+#define ZYNQMP_CSU_STATUS_ENCRYPTED    BIT(1)
+
 struct csu_regs {
-       u32 reserved0[4];
+       u32 status;
+       u32 reserved0[3];
        u32 multi_boot;
        u32 reserved1[7];
        u32 jtag_chain_status_wr;

diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
index 2b5239c..242e143 100644 (file)
--- a/board/xilinx/zynqmp/zynqmp.c
+++ b/board/xilinx/zynqmp/zynqmp.c
@@ -373,6 +373,18 @@ static void restore_jtag(void)
 }
 #endif
 
+static void print_secure_boot(void)
+{
+       u32 status = 0;
+
+       if (zynqmp_mmio_read((ulong)&csu_base->status, &status))
+               return;
+
+       printf("Secure Boot:\t%sauthenticated, %sencrypted\n",
+              status & ZYNQMP_CSU_STATUS_AUTHENTICATED ? "" : "not ",
+              status & ZYNQMP_CSU_STATUS_ENCRYPTED ? "" : "not ");
+}
+
 #define PS_SYSMON_ANALOG_BUS_VAL       0x3210
 #define PS_SYSMON_ANALOG_BUS_REG       0xFFA50914
 
@@ -413,6 +425,8 @@ int board_init(void)
        fpga_add(fpga_xilinx, &zynqmppl);
 #endif
 
+       /* display secure boot information */
+       print_secure_boot();
        if (current_el() == 3)
                printf("Multiboot:\t%d\n", multi_boot());