| /* 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); |
| } |