u-boot/arch/arm/mach-k3/security.c
Andrew F. Davis 3a543a8084 arm: mach-k3: Add secure device support
K3 devices have High Security (HS) variants along with the non-HS already
supported. Like the previous generation devices (OMAP/Keystone2) K3
supports boot chain-of-trust by authenticating and optionally decrypting
images as they are unpacked from FIT images. Add support for this here.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Andreas Dannenberg <dannenberg@ti.com>
2019-04-26 17:51:51 -04:00

63 lines
1.8 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* K3: Security functions
*
* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
* Andrew F. Davis <afd@ti.com>
*/
#include <common.h>
#include <dm.h>
#include <linux/soc/ti/ti_sci_protocol.h>
#include <mach/spl.h>
#include <spl.h>
void board_fit_image_post_process(void **p_image, size_t *p_size)
{
struct udevice *dev;
struct ti_sci_handle *ti_sci;
struct ti_sci_proc_ops *proc_ops;
u64 image_addr;
u32 image_size;
int ret;
/* Get handle to Device Management and Security Controller (SYSFW) */
ret = uclass_get_device_by_name(UCLASS_FIRMWARE, "dmsc", &dev);
if (ret) {
printf("Failed to get handle to SYSFW (%d)\n", ret);
hang();
}
ti_sci = (struct ti_sci_handle *)(ti_sci_get_handle_from_sysfw(dev));
proc_ops = &ti_sci->ops.proc_ops;
image_addr = (uintptr_t)*p_image;
debug("Authenticating image at address 0x%016llx\n", image_addr);
/* Authenticate image */
ret = proc_ops->proc_auth_boot_image(ti_sci, &image_addr, &image_size);
if (ret) {
printf("Authentication failed!\n");
hang();
}
/*
* The image_size returned may be 0 when the authentication process has
* moved the image. When this happens no further processing on the
* image is needed or often even possible as it may have also been
* placed behind a firewall when moved.
*/
*p_size = image_size;
/*
* Output notification of successful authentication to re-assure the
* user that the secure code is being processed as expected. However
* suppress any such log output in case of building for SPL and booting
* via YMODEM. This is done to avoid disturbing the YMODEM serial
* protocol transactions.
*/
if (!(IS_ENABLED(CONFIG_SPL_BUILD) &&
IS_ENABLED(CONFIG_SPL_YMODEM_SUPPORT) &&
spl_boot_device() == BOOT_DEVICE_UART))
printf("Authentication passed\n");
}