diff options
author | Thiebaud Weksteen <tweek@google.com> | 2018-04-12 13:13:48 +0300 |
---|---|---|
committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2018-05-09 14:45:46 +0300 |
commit | 0bfb23746052168620c5b52f49d8a47c3bb022fa (patch) | |
tree | bc15d06fba375be8bd03fd9cec54f754f4899638 /drivers/char/tpm/eventlog/efi.c | |
parent | 09dd144f72e77bc962f44e3bd17bccfa6aceef4b (diff) | |
download | linux-0bfb23746052168620c5b52f49d8a47c3bb022fa.tar.xz |
tpm: Move eventlog files to a subdirectory
Signed-off-by: Thiebaud Weksteen <tweek@google.com>
Suggested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Diffstat (limited to 'drivers/char/tpm/eventlog/efi.c')
-rw-r--r-- | drivers/char/tpm/eventlog/efi.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/drivers/char/tpm/eventlog/efi.c b/drivers/char/tpm/eventlog/efi.c new file mode 100644 index 000000000000..e1593c5271a4 --- /dev/null +++ b/drivers/char/tpm/eventlog/efi.c @@ -0,0 +1,66 @@ +/* + * Copyright (C) 2017 Google + * + * Authors: + * Thiebaud Weksteen <tweek@google.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + */ + +#include <linux/efi.h> +#include <linux/tpm_eventlog.h> + +#include "../tpm.h" + +/* read binary bios log from EFI configuration table */ +int tpm_read_log_efi(struct tpm_chip *chip) +{ + + struct linux_efi_tpm_eventlog *log_tbl; + struct tpm_bios_log *log; + u32 log_size; + u8 tpm_log_version; + + if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) + return -ENODEV; + + if (efi.tpm_log == EFI_INVALID_TABLE_ADDR) + return -ENODEV; + + log = &chip->log; + + log_tbl = memremap(efi.tpm_log, sizeof(*log_tbl), MEMREMAP_WB); + if (!log_tbl) { + pr_err("Could not map UEFI TPM log table !\n"); + return -ENOMEM; + } + + log_size = log_tbl->size; + memunmap(log_tbl); + + log_tbl = memremap(efi.tpm_log, sizeof(*log_tbl) + log_size, + MEMREMAP_WB); + if (!log_tbl) { + pr_err("Could not map UEFI TPM log table payload!\n"); + return -ENOMEM; + } + + /* malloc EventLog space */ + log->bios_event_log = kmalloc(log_size, GFP_KERNEL); + if (!log->bios_event_log) + goto err_memunmap; + memcpy(log->bios_event_log, log_tbl->log, log_size); + log->bios_event_log_end = log->bios_event_log + log_size; + + tpm_log_version = log_tbl->version; + memunmap(log_tbl); + return tpm_log_version; + +err_memunmap: + memunmap(log_tbl); + return -ENOMEM; +} |