| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 | |