diff options
Diffstat (limited to 'src/security/lockdown/lockdown.c')
| -rw-r--r-- | src/security/lockdown/lockdown.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/security/lockdown/lockdown.c b/src/security/lockdown/lockdown.c new file mode 100644 index 0000000000..a8aad9b5eb --- /dev/null +++ b/src/security/lockdown/lockdown.c @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* This file is part of the coreboot project. */ + +#include <boot_device.h> +#include <commonlib/region.h> +#include <console/console.h> +#include <bootstate.h> + +/* + * Enables read- /write protection of the bootmedia. + */ +void boot_device_security_lockdown(void) +{ + const struct region_device *rdev; + 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; + } + printk(BIOS_DEBUG, "using CTRL...\n"); + } else { + if (CONFIG(BOOTMEDIA_LOCK_WHOLE_RO)) { + printk(BIOS_DEBUG, "'readonly'"); + lock_type = MEDIA_WP; + } + printk(BIOS_DEBUG, "using flash chip...\n"); + } + + rdev = boot_device_ro(); + + if (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 |