8b48463f89
Replace direct inclusions of <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h>, which are incorrect, with <linux/acpi.h> inclusions and remove some inclusions of those files that aren't necessary. First of all, <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h> should not be included directly from any files that are built for CONFIG_ACPI unset, because that generally leads to build warnings about undefined symbols in !CONFIG_ACPI builds. For CONFIG_ACPI set, <linux/acpi.h> includes those files and for CONFIG_ACPI unset it provides stub ACPI symbols to be used in that case. Second, there are ordering dependencies between those files that always have to be met. Namely, it is required that <acpi/acpi_bus.h> be included prior to <acpi/acpi_drivers.h> so that the acpi_pci_root declarations the latter depends on are always there. And <acpi/acpi.h> which provides basic ACPICA type declarations should always be included prior to any other ACPI headers in CONFIG_ACPI builds. That also is taken care of including <linux/acpi.h> as appropriate. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Tony Luck <tony.luck@intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> (drivers/pci stuff) Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> (Xen stuff) Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/*
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* Copyright (C) 2005 IBM Corporation
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*
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* Authors:
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* Seiji Munetoh <munetoh@jp.ibm.com>
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* Stefan Berger <stefanb@us.ibm.com>
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* Reiner Sailer <sailer@watson.ibm.com>
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* Kylene Hall <kjhall@us.ibm.com>
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*
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* Maintained by: <tpmdd-devel@lists.sourceforge.net>
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*
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* Access to the eventlog extended by the TCG BIOS of PC platform
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#include <linux/seq_file.h>
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#include <linux/fs.h>
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#include <linux/security.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/acpi.h>
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#include "tpm.h"
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#include "tpm_eventlog.h"
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struct acpi_tcpa {
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struct acpi_table_header hdr;
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u16 platform_class;
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union {
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struct client_hdr {
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u32 log_max_len __packed;
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u64 log_start_addr __packed;
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} client;
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struct server_hdr {
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u16 reserved;
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u64 log_max_len __packed;
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u64 log_start_addr __packed;
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} server;
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};
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};
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/* read binary bios log */
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int read_log(struct tpm_bios_log *log)
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{
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struct acpi_tcpa *buff;
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acpi_status status;
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void __iomem *virt;
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u64 len, start;
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if (log->bios_event_log != NULL) {
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printk(KERN_ERR
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"%s: ERROR - Eventlog already initialized\n",
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__func__);
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return -EFAULT;
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}
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/* Find TCPA entry in RSDT (ACPI_LOGICAL_ADDRESSING) */
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status = acpi_get_table(ACPI_SIG_TCPA, 1,
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(struct acpi_table_header **)&buff);
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if (ACPI_FAILURE(status)) {
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printk(KERN_ERR "%s: ERROR - Could not get TCPA table\n",
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__func__);
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return -EIO;
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}
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switch(buff->platform_class) {
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case BIOS_SERVER:
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len = buff->server.log_max_len;
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start = buff->server.log_start_addr;
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break;
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case BIOS_CLIENT:
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default:
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len = buff->client.log_max_len;
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start = buff->client.log_start_addr;
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break;
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}
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if (!len) {
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printk(KERN_ERR "%s: ERROR - TCPA log area empty\n", __func__);
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return -EIO;
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}
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/* malloc EventLog space */
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log->bios_event_log = kmalloc(len, GFP_KERNEL);
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if (!log->bios_event_log) {
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printk("%s: ERROR - Not enough Memory for BIOS measurements\n",
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__func__);
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return -ENOMEM;
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}
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log->bios_event_log_end = log->bios_event_log + len;
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virt = acpi_os_map_memory(start, len);
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if (!virt) {
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kfree(log->bios_event_log);
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printk("%s: ERROR - Unable to map memory\n", __func__);
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return -EIO;
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}
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memcpy_fromio(log->bios_event_log, virt, len);
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acpi_os_unmap_memory(virt, len);
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return 0;
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}
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