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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2017 Google
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*
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* Authors:
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* Thiebaud Weksteen <tweek@google.com>
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*/
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#include <linux/efi.h>
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#include <linux/tpm_eventlog.h>
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#include "../tpm.h"
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#include "common.h"
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/* read binary bios log from EFI configuration table */
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int tpm_read_log_efi(struct tpm_chip *chip)
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{
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struct linux_efi_tpm_eventlog *log_tbl;
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struct tpm_bios_log *log;
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u32 log_size;
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u8 tpm_log_version;
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if (!(chip->flags & TPM_CHIP_FLAG_TPM2))
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return -ENODEV;
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if (efi.tpm_log == EFI_INVALID_TABLE_ADDR)
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return -ENODEV;
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log = &chip->log;
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log_tbl = memremap(efi.tpm_log, sizeof(*log_tbl), MEMREMAP_WB);
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if (!log_tbl) {
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pr_err("Could not map UEFI TPM log table !\n");
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return -ENOMEM;
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}
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log_size = log_tbl->size;
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memunmap(log_tbl);
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log_tbl = memremap(efi.tpm_log, sizeof(*log_tbl) + log_size,
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MEMREMAP_WB);
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if (!log_tbl) {
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pr_err("Could not map UEFI TPM log table payload!\n");
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return -ENOMEM;
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}
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/* malloc EventLog space */
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log->bios_event_log = kmemdup(log_tbl->log, log_size, GFP_KERNEL);
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if (!log->bios_event_log)
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goto err_memunmap;
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log->bios_event_log_end = log->bios_event_log + log_size;
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tpm_log_version = log_tbl->version;
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memunmap(log_tbl);
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return tpm_log_version;
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err_memunmap:
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memunmap(log_tbl);
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return -ENOMEM;
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}
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