2 * Copyright (C) 2017 Google
5 * Thiebaud Weksteen <tweek@google.com>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
14 #include <linux/efi.h>
15 #include <linux/tpm_eventlog.h>
20 /* read binary bios log from EFI configuration table */
21 int tpm_read_log_efi(struct tpm_chip *chip)
24 struct linux_efi_tpm_eventlog *log_tbl;
25 struct tpm_bios_log *log;
29 if (!(chip->flags & TPM_CHIP_FLAG_TPM2))
32 if (efi.tpm_log == EFI_INVALID_TABLE_ADDR)
37 log_tbl = memremap(efi.tpm_log, sizeof(*log_tbl), MEMREMAP_WB);
39 pr_err("Could not map UEFI TPM log table !\n");
43 log_size = log_tbl->size;
47 pr_warn("UEFI TPM log area empty\n");
51 log_tbl = memremap(efi.tpm_log, sizeof(*log_tbl) + log_size,
54 pr_err("Could not map UEFI TPM log table payload!\n");
58 /* malloc EventLog space */
59 log->bios_event_log = kmemdup(log_tbl->log, log_size, GFP_KERNEL);
60 if (!log->bios_event_log)
62 log->bios_event_log_end = log->bios_event_log + log_size;
64 tpm_log_version = log_tbl->version;
66 return tpm_log_version;