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// 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;
}
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