From b524f8fb1e94a8e649ba06a7cb87e6dcaa96ebc3 Mon Sep 17 00:00:00 2001 From: Adrian Fiergolski Date: Fri, 22 Jul 2022 17:16:14 +0300 Subject: fpga: zynqmp: support loading encrypted bitfiles Add supporting new compatible string "u-boot,zynqmp-fpga-enc" to handle loading encrypted bitfiles. This feature requires encrypted FSBL, as according to UG1085: "The CSU automatically locks out the AES key, stored in either BBRAM or eFUSEs, as a key source to the AES engine if the FSBL is not encrypted. This prevents using the BBRAM or eFUSE as the key source to the AES engine during run-time applications." Signed-off-by: Adrian Fiergolski Co-developed-by: Oleksandr Suvorov Signed-off-by: Oleksandr Suvorov Tested-by: Adrian Fiergolski Link: https://lore.kernel.org/r/20220722141614.297383-14-oleksandr.suvorov@foundries.io Signed-off-by: Michal Simek --- drivers/fpga/zynqmppl.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers') diff --git a/drivers/fpga/zynqmppl.c b/drivers/fpga/zynqmppl.c index fc55d7a388f..d1491da02c3 100644 --- a/drivers/fpga/zynqmppl.c +++ b/drivers/fpga/zynqmppl.c @@ -257,6 +257,11 @@ static int zynqmp_load(xilinx_desc *desc, const void *buf, size_t bsize, info.authflag = ZYNQMP_FPGA_AUTH_DDR; info.encflag = FPGA_NO_ENC_OR_NO_AUTH; return desc->operations->loads(desc, buf, bsize, &info); + case FPGA_XILINX_ZYNQMP_ENC: + /* Encryption using device key */ + info.authflag = FPGA_NO_ENC_OR_NO_AUTH; + info.encflag = FPGA_ENC_DEV_KEY; + return desc->operations->loads(desc, buf, bsize, &info); #endif default: printf("Unsupported bitstream type %d\n", flags); @@ -360,6 +365,9 @@ static int __maybe_unused zynqmp_str2flag(xilinx_desc *desc, const char *str) #if CONFIG_IS_ENABLED(FPGA_LOAD_SECURE) if (!strncmp(str, "u-boot,zynqmp-fpga-ddrauth", 26)) return FPGA_XILINX_ZYNQMP_DDRAUTH; + + if (!strncmp(str, "u-boot,zynqmp-fpga-enc", 22)) + return FPGA_XILINX_ZYNQMP_ENC; #endif return 0; } -- cgit v1.3.1