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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/char/tpm/tpm_acpi.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/char/tpm/tpm_acpi.c')
-rw-r--r--kernel/drivers/char/tpm/tpm_acpi.c109
1 files changed, 109 insertions, 0 deletions
diff --git a/kernel/drivers/char/tpm/tpm_acpi.c b/kernel/drivers/char/tpm/tpm_acpi.c
new file mode 100644
index 000000000..565a9478c
--- /dev/null
+++ b/kernel/drivers/char/tpm/tpm_acpi.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2005 IBM Corporation
+ *
+ * Authors:
+ * Seiji Munetoh <munetoh@jp.ibm.com>
+ * Stefan Berger <stefanb@us.ibm.com>
+ * Reiner Sailer <sailer@watson.ibm.com>
+ * Kylene Hall <kjhall@us.ibm.com>
+ *
+ * Maintained by: <tpmdd-devel@lists.sourceforge.net>
+ *
+ * Access to the eventlog extended by the TCG BIOS of PC platform
+ *
+ * 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/seq_file.h>
+#include <linux/fs.h>
+#include <linux/security.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+
+#include "tpm.h"
+#include "tpm_eventlog.h"
+
+struct acpi_tcpa {
+ struct acpi_table_header hdr;
+ u16 platform_class;
+ union {
+ struct client_hdr {
+ u32 log_max_len __packed;
+ u64 log_start_addr __packed;
+ } client;
+ struct server_hdr {
+ u16 reserved;
+ u64 log_max_len __packed;
+ u64 log_start_addr __packed;
+ } server;
+ };
+};
+
+/* read binary bios log */
+int read_log(struct tpm_bios_log *log)
+{
+ struct acpi_tcpa *buff;
+ acpi_status status;
+ void __iomem *virt;
+ u64 len, start;
+
+ if (log->bios_event_log != NULL) {
+ printk(KERN_ERR
+ "%s: ERROR - Eventlog already initialized\n",
+ __func__);
+ return -EFAULT;
+ }
+
+ /* Find TCPA entry in RSDT (ACPI_LOGICAL_ADDRESSING) */
+ status = acpi_get_table(ACPI_SIG_TCPA, 1,
+ (struct acpi_table_header **)&buff);
+
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR "%s: ERROR - Could not get TCPA table\n",
+ __func__);
+ return -EIO;
+ }
+
+ switch(buff->platform_class) {
+ case BIOS_SERVER:
+ len = buff->server.log_max_len;
+ start = buff->server.log_start_addr;
+ break;
+ case BIOS_CLIENT:
+ default:
+ len = buff->client.log_max_len;
+ start = buff->client.log_start_addr;
+ break;
+ }
+ if (!len) {
+ printk(KERN_ERR "%s: ERROR - TCPA log area empty\n", __func__);
+ return -EIO;
+ }
+
+ /* malloc EventLog space */
+ log->bios_event_log = kmalloc(len, GFP_KERNEL);
+ if (!log->bios_event_log) {
+ printk("%s: ERROR - Not enough Memory for BIOS measurements\n",
+ __func__);
+ return -ENOMEM;
+ }
+
+ log->bios_event_log_end = log->bios_event_log + len;
+
+ virt = acpi_os_map_iomem(start, len);
+ if (!virt) {
+ kfree(log->bios_event_log);
+ printk("%s: ERROR - Unable to map memory\n", __func__);
+ return -EIO;
+ }
+
+ memcpy_fromio(log->bios_event_log, virt, len);
+
+ acpi_os_unmap_iomem(virt, len);
+ return 0;
+}