| /* Copyright 2019 The Chromium OS Authors. All rights reserved. |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| * |
| * Auxiliary firmware (auxfw) sync routines for vboot. |
| */ |
| |
| #include "2api.h" |
| #include "2common.h" |
| #include "2misc.h" |
| |
| /** |
| * Determine if we are allowed to update auxfw. |
| * |
| * @param ctx Vboot2 context |
| * @return boolean (true iff we can update auxfw) |
| */ |
| static int auxfw_sync_allowed(struct vb2_context *ctx) |
| { |
| struct vb2_gbb_header *gbb = vb2_get_gbb(ctx); |
| |
| /* Reasons not to do sync at all */ |
| if (gbb->flags & VB2_GBB_FLAG_DISABLE_AUXFW_SOFTWARE_SYNC) |
| return 0; |
| if (ctx->flags & VB2_CONTEXT_RECOVERY_MODE) |
| return 0; |
| return 1; |
| } |
| |
| /** |
| * Decides if auxfw sync is allowed to be performed. |
| * |
| * If sync is allowed, invokes the external callback, |
| * vb2ex_auxfw_check() to allow the client to decide on the auxfw |
| * update severity. |
| * |
| * @param ctx Vboot2 context |
| * @return VB2_SUCCESS, or non-zero error code. |
| */ |
| static vb2_error_t auxfw_sync_check_update(struct vb2_context *ctx, |
| enum vb2_auxfw_update_severity *severity) |
| { |
| if (!auxfw_sync_allowed(ctx)) { |
| *severity = VB2_AUXFW_NO_UPDATE; |
| return VB2_SUCCESS; |
| } |
| |
| return vb2ex_auxfw_check(severity); |
| } |
| |
| vb2_error_t vb2api_auxfw_sync(struct vb2_context *ctx) |
| { |
| enum vb2_auxfw_update_severity fw_update = VB2_AUXFW_NO_UPDATE; |
| |
| /* Check for update severity */ |
| VB2_TRY(auxfw_sync_check_update(ctx, &fw_update)); |
| |
| if (fw_update > VB2_AUXFW_NO_UPDATE) { |
| VB2_DEBUG("Updating auxfw\n"); |
| VB2_TRY(vb2ex_auxfw_update(), ctx, VB2_RECOVERY_AUXFW_UPDATE); |
| /* |
| * auxfw update is applied successfully. Request EC reboot to |
| * RO, so that the chips that had FW update get reset to a |
| * clean state. |
| */ |
| return VB2_REQUEST_REBOOT_EC_TO_RO; |
| } |
| |
| return vb2ex_auxfw_finalize(ctx); |
| } |