1 /* 2 * Copyright (C) 2017 Google, Inc. 3 * Thiebaud Weksteen <tweek@google.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 */ 9 10 #include <linux/efi.h> 11 #include <linux/init.h> 12 #include <linux/memblock.h> 13 14 #include <asm/early_ioremap.h> 15 16 /* 17 * Reserve the memory associated with the TPM Event Log configuration table. 18 */ 19 int __init efi_tpm_eventlog_init(void) 20 { 21 struct linux_efi_tpm_eventlog *log_tbl; 22 unsigned int tbl_size; 23 24 if (efi.tpm_log == EFI_INVALID_TABLE_ADDR) 25 return 0; 26 27 log_tbl = early_memremap(efi.tpm_log, sizeof(*log_tbl)); 28 if (!log_tbl) { 29 pr_err("Failed to map TPM Event Log table @ 0x%lx\n", 30 efi.tpm_log); 31 efi.tpm_log = EFI_INVALID_TABLE_ADDR; 32 return -ENOMEM; 33 } 34 35 tbl_size = sizeof(*log_tbl) + log_tbl->size; 36 memblock_reserve(efi.tpm_log, tbl_size); 37 early_memunmap(log_tbl, sizeof(*log_tbl)); 38 return 0; 39 } 40 41