/* SPDX-License-Identifier: GPL-2.0-or-later */ #include <boot_device.h> #include <commonlib/region.h> #include <console/console.h> #include <bootstate.h> #include <fmap.h> /* * Enables read- /write protection of the bootmedia. */ void boot_device_security_lockdown(void) { const struct region_device *rdev = NULL; struct region_device dev; enum bootdev_prot_type lock_type; printk(BIOS_DEBUG, "BM-LOCKDOWN: Enabling boot media protection scheme "); if (CONFIG(BOOTMEDIA_LOCK_CONTROLLER)) { if (CONFIG(BOOTMEDIA_LOCK_WHOLE_RO)) { printk(BIOS_DEBUG, "'readonly'"); lock_type = CTRLR_WP; } else if (CONFIG(BOOTMEDIA_LOCK_WHOLE_NO_ACCESS)) { printk(BIOS_DEBUG, "'no access'"); lock_type = CTRLR_RWP; } else if (CONFIG(BOOTMEDIA_LOCK_WPRO_VBOOT_RO)) { printk(BIOS_DEBUG, "'WP_RO only'"); lock_type = CTRLR_WP; } printk(BIOS_DEBUG, " using CTRL...\n"); } else { if (CONFIG(BOOTMEDIA_LOCK_WHOLE_RO)) { printk(BIOS_DEBUG, "'readonly'"); lock_type = MEDIA_WP; } else if (CONFIG(BOOTMEDIA_LOCK_WPRO_VBOOT_RO)) { printk(BIOS_DEBUG, "'WP_RO only'"); lock_type = MEDIA_WP; } printk(BIOS_DEBUG, " using flash chip...\n"); } if (CONFIG(BOOTMEDIA_LOCK_WPRO_VBOOT_RO)) { if (fmap_locate_area_as_rdev("WP_RO", &dev) < 0) printk(BIOS_ERR, "BM-LOCKDOWN: Could not find region 'WP_RO'\n"); else rdev = &dev; } else { rdev = boot_device_ro(); } if (rdev && boot_device_wp_region(rdev, lock_type) >= 0) printk(BIOS_INFO, "BM-LOCKDOWN: Enabled bootmedia protection\n"); else printk(BIOS_ERR, "BM-LOCKDOWN: Failed to enable bootmedia protection\n"); } static void lock(void *unused) { boot_device_security_lockdown(); } /* * Keep in sync with mrc_cache.c */ #if CONFIG(MRC_WRITE_NV_LATE) BOOT_STATE_INIT_ENTRY(BS_OS_RESUME_CHECK, BS_ON_EXIT, lock, NULL); #else BOOT_STATE_INIT_ENTRY(BS_DEV_RESOURCES, BS_ON_ENTRY, lock, NULL); #endif