| 1 | |
| 2 |
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| 3 | #include <linux/efi_embedded_fw.h>
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| 4 | #include <linux/property.h>
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| 5 | #include <linux/security.h>
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| 6 | #include <linux/vmalloc.h>
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| 7 |
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| 8 | #include "fallback.h"
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| 9 | #include "firmware.h"
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| 10 |
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| 11 | int firmware_fallback_platform(struct fw_priv *fw_priv)
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| 12 | {
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| 13 | const u8 *data;
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| 14 | size_t size;
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| 15 | int rc;
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| 16 |
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| 17 | if (!(fw_priv->opt_flags & FW_OPT_FALLBACK_PLATFORM))
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| 18 | return -ENOENT;
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| 19 |
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| 20 | rc = security_kernel_load_data(LOADING_FIRMWARE, true);
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| 21 | if (rc)
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| 22 | return rc;
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| 23 |
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| 24 | rc = efi_get_embedded_fw(fw_priv->fw_name, &data, &size);
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| 25 | if (rc)
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| 26 | return rc;
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| 27 |
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| 28 | if (fw_priv->data && size > fw_priv->allocated_size)
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| 29 | return -ENOMEM;
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| 30 |
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| 31 | rc = security_kernel_post_load_data((u8 *)data, size, LOADING_FIRMWARE,
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| 32 | "platform");
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| 33 | if (rc)
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| 34 | return rc;
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| 35 |
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| 36 | if (!fw_priv->data)
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| 37 | fw_priv->data = vmalloc(size);
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| 38 | if (!fw_priv->data)
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| 39 | return -ENOMEM;
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| 40 |
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| 41 | memcpy(fw_priv->data, data, size);
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| 42 | fw_priv->size = size;
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| 43 | fw_state_done(fw_priv);
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| 44 | return 0;
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| 45 | }
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