// SPDX-License-Identifier: GPL-2.0 #include <linux/efi_embedded_fw.h> #include <linux/property.h> #include <linux/security.h> #include <linux/vmalloc.h> #include "fallback.h" #include "firmware.h" int firmware_fallback_platform(struct fw_priv *fw_priv) { const u8 *data; size_t size; int rc; if (!(fw_priv->opt_flags & FW_OPT_FALLBACK_PLATFORM)) return -ENOENT; rc = security_kernel_load_data(LOADING_FIRMWARE, true); if (rc) return rc; rc = efi_get_embedded_fw(fw_priv->fw_name, &data, &size); if (rc) return rc; /* rc == -ENOENT when the fw was not found */ if (fw_priv->data && size > fw_priv->allocated_size) return -ENOMEM; rc = security_kernel_post_load_data((u8 *)data, size, LOADING_FIRMWARE, "platform"); if (rc) return rc; if (!fw_priv->data) fw_priv->data = vmalloc(size); if (!fw_priv->data) return -ENOMEM; memcpy(fw_priv->data, data, size); fw_priv->size = size; fw_state_done(fw_priv); return 0; }