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/* SPDX-License-Identifier: GPL-2.0-only */
#include <boot_device.h>
#include <cbfs.h>
#include <commonlib/bsd/cbfs_private.h>
#include <console/console.h>
#include <ec/google/chromeec/ec.h>
#include <rmodule.h>
#include <security/vboot/misc.h>
#include <security/vboot/symbols.h>
#include <security/vboot/vboot_common.h>
/* Ensure vboot configuration is valid: */
_Static_assert(CONFIG(VBOOT_STARTS_IN_BOOTBLOCK) +
CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK) +
CONFIG(VBOOT_STARTS_IN_ROMSTAGE) == 1,
"vboot must start in bootblock, PSP or romstage (but only one!)");
_Static_assert(!CONFIG(VBOOT_SEPARATE_VERSTAGE) || CONFIG(VBOOT_STARTS_IN_BOOTBLOCK) ||
CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK),
"stand-alone verstage must start in or before bootblock ");
_Static_assert(!CONFIG(VBOOT_RETURN_FROM_VERSTAGE) ||
CONFIG(VBOOT_SEPARATE_VERSTAGE),
"return from verstage only makes sense for separate verstages");
int vboot_executed;
static void after_verstage(void)
{
vboot_executed = 1; /* Mark verstage execution complete. */
const struct cbfs_boot_device *cbd = vboot_get_cbfs_boot_device();
if (!cbd) /* Can't initialize RW CBFS in recovery mode. */
return;
cb_err_t err = cbfs_init_boot_device(cbd, NULL); /* TODO: RW hash */
if (err && err != CB_CBFS_CACHE_FULL) /* TODO: -> recovery? */
die("RW CBFS initialization failure: %d", err);
}
void vboot_run_logic(void)
{
if (verification_should_run()) {
/* Note: this path is not used for VBOOT_RETURN_FROM_VERSTAGE */
verstage_main();
after_verstage();
} else if (verstage_should_load()) {
struct cbfsf file;
struct prog verstage =
PROG_INIT(PROG_VERSTAGE,
CONFIG_CBFS_PREFIX "/verstage");
printk(BIOS_DEBUG, "VBOOT: Loading verstage.\n");
/* load verstage from RO */
if (cbfs_boot_locate(&file, prog_name(&verstage), NULL))
die("failed to load verstage");
cbfs_file_data(prog_rdev(&verstage), &file);
if (cbfs_prog_stage_load(&verstage))
die("failed to load verstage");
/* verify and select a slot */
prog_run(&verstage);
/* This is not actually possible to hit this condition at
* runtime, but this provides a hint to the compiler for dead
* code elimination below. */
if (!CONFIG(VBOOT_RETURN_FROM_VERSTAGE))
return;
after_verstage();
}
}
const struct cbfs_boot_device *vboot_get_cbfs_boot_device(void)
{
/* Don't honor vboot results until the vboot logic has run. */
if (!vboot_logic_executed())
return NULL;
static struct cbfs_boot_device cbd;
if (region_device_sz(&cbd.rdev))
return &cbd;
struct vb2_context *ctx = vboot_get_context();
if (ctx->flags & VB2_CONTEXT_RECOVERY_MODE)
return NULL;
boot_device_init();
if (vboot_locate_firmware(ctx, &cbd.rdev))
return NULL;
cbfs_boot_device_find_mcache(&cbd, CBMEM_ID_CBFS_RW_MCACHE);
return &cbd;
}
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