Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/efi_embedded_fw.h>
4#include <linux/property.h>
5#include <linux/security.h>
6#include <linux/vmalloc.h>
7
8#include "fallback.h"
9#include "firmware.h"
10
11int firmware_fallback_platform(struct fw_priv *fw_priv, enum fw_opt opt_flags)
12{
13 const u8 *data;
14 size_t size;
15 int rc;
16
17 if (!(opt_flags & FW_OPT_FALLBACK_PLATFORM))
18 return -ENOENT;
19
20 rc = security_kernel_load_data(LOADING_FIRMWARE_EFI_EMBEDDED);
21 if (rc)
22 return rc;
23
24 rc = efi_get_embedded_fw(fw_priv->fw_name, &data, &size);
25 if (rc)
26 return rc; /* rc == -ENOENT when the fw was not found */
27
28 fw_priv->data = vmalloc(size);
29 if (!fw_priv->data)
30 return -ENOMEM;
31
32 memcpy(fw_priv->data, data, size);
33 fw_priv->size = size;
34 fw_state_done(fw_priv);
35 return 0;
36}