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/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/cbmem_console.h>
#include <reset.h>
#include <security/tpm/tss_errors.h>
#include <security/vboot/misc.h>
#include <security/vboot/vboot_common.h>
#include <security/vboot/vbnv.h>
#include <vb2_api.h>
#include "antirollback.h"
static void save_secdata(struct vb2_context *ctx)
{
if (ctx->flags & VB2_CONTEXT_SECDATA_FIRMWARE_CHANGED
&& (CONFIG(VBOOT_MOCK_SECDATA) || tlcl_lib_init() == TPM_SUCCESS)) {
printk(BIOS_INFO, "Saving secdata firmware\n");
antirollback_write_space_firmware(ctx);
ctx->flags &= ~VB2_CONTEXT_SECDATA_FIRMWARE_CHANGED;
}
if (ctx->flags & VB2_CONTEXT_SECDATA_KERNEL_CHANGED
&& (CONFIG(VBOOT_MOCK_SECDATA) || tlcl_lib_init() == TPM_SUCCESS)) {
printk(BIOS_INFO, "Saving secdata kernel\n");
antirollback_write_space_kernel(ctx);
ctx->flags &= ~VB2_CONTEXT_SECDATA_KERNEL_CHANGED;
}
}
void vboot_save_data(struct vb2_context *ctx)
{
if (!verification_should_run() && !(ENV_ROMSTAGE && CONFIG(VBOOT_EARLY_EC_SYNC))) {
if (ctx->flags
& (VB2_CONTEXT_SECDATA_FIRMWARE_CHANGED
| VB2_CONTEXT_SECDATA_KERNEL_CHANGED))
die("TPM writeback in " ENV_STRING "?");
} else {
save_secdata(ctx);
}
if (ctx->flags & VB2_CONTEXT_NVDATA_CHANGED) {
printk(BIOS_INFO, "Saving nvdata\n");
save_vbnv(ctx->nvdata);
ctx->flags &= ~VB2_CONTEXT_NVDATA_CHANGED;
}
}
/* Check if it is okay to enable USB Device Controller (UDC). */
int vboot_can_enable_udc(void)
{
/* Allow UDC in all vboot modes. */
if (!CONFIG(CHROMEOS) && CONFIG(VBOOT_ALWAYS_ALLOW_UDC))
return 1;
/* Always disable if not in developer mode */
if (!vboot_developer_mode_enabled())
return 0;
/* Enable if GBB flag is set */
if (vboot_is_gbb_flag_set(VB2_GBB_FLAG_ENABLE_UDC))
return 1;
/* Enable if VBNV flag is set */
if (vbnv_udc_enable_flag())
return 1;
/* Otherwise disable */
return 0;
}
/* ============================ VBOOT REBOOT ============================== */
void __weak vboot_platform_prepare_reboot(void)
{
}
void vboot_reboot(void)
{
if (CONFIG(CONSOLE_CBMEM_DUMP_TO_UART))
cbmem_dump_console_to_uart();
vboot_platform_prepare_reboot();
board_reset();
}
void vboot_save_and_reboot(struct vb2_context *ctx, uint8_t subcode)
{
printk(BIOS_INFO, "vboot: reboot requested (%#x)\n", subcode);
vboot_save_data(ctx);
vboot_reboot();
}
void vboot_fail_and_reboot(struct vb2_context *ctx, uint8_t reason, uint8_t subcode)
{
if (reason)
vb2api_fail(ctx, reason, subcode);
vboot_save_and_reboot(ctx, subcode);
}
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