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