[PATCH 1/2][v3] acpi: tpm2: Add ACPI TPM2 test

[Alex Hung]

Signed-off-by: Alex Hung <alex.hung at canonical.com>
---
 src/Makefile.am             |   1 +
 src/acpi/tpm2/tpm2.c        | 104 ++++++++++++++++++++++++++++++++++++++++++++
 src/lib/include/fwts_acpi.h |   9 ++++
 3 files changed, 114 insertions(+)
 create mode 100644 src/acpi/tpm2/tpm2.c

diff --git a/src/Makefile.am b/src/Makefile.am
index 3a77196..ba626f0 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -75,6 +75,7 @@ fwts_SOURCES = main.c 				\
 	acpi/spcr/spcr.c 			\
 	acpi/spmi/spmi.c 			\
 	acpi/tcpa/tcpa.c 			\
+	acpi/tpm2/tpm2.c 			\
 	acpi/srat/srat.c 			\
 	acpi/syntaxcheck/syntaxcheck.c 		\
 	acpi/uefi/uefi.c			\
diff --git a/src/acpi/tpm2/tpm2.c b/src/acpi/tpm2/tpm2.c
new file mode 100644
index 0000000..50a0e85
--- /dev/null
+++ b/src/acpi/tpm2/tpm2.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2010-2015 Canonical
+ *
+  * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+#include "fwts.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <stdbool.h>
+
+static fwts_acpi_table_info *table;
+
+static int tpm2_init(fwts_framework *fw)
+{
+	if (fwts_acpi_find_table(fw, "TPM2", 0, &table) != FWTS_OK) {
+		fwts_log_error(fw, "Cannot load ACPI table");
+		return FWTS_ERROR;
+	}
+	if (table == NULL) {
+		fwts_log_error(fw, "ACPI TPM2 table does not exist, skipping test");
+		return FWTS_ERROR;
+	}
+
+	return FWTS_OK;
+}
+
+/*
+ * TPM2 table
+ *   available @ http://www.trustedcomputinggroup.org/files/static_page_files/648D7D46-1A4B-B294-D088037B8F73DAAF/TCG_ACPIGeneralSpecification_1-10_0-37-Published.pdf
+ */
+static int tpm2_test1(fwts_framework *fw)
+{
+	fwts_acpi_table_tpm2 *tpm2 = (fwts_acpi_table_tpm2*) table->data;
+	bool passed = true;
+
+	fwts_log_info_verbatum(fw, "TPM2 Table:");
+	fwts_log_info_verbatum(fw, "  Platform Class:                  0x%4.4"   PRIx16, tpm2->platform_class);
+	fwts_log_info_verbatum(fw, "  Reserved:                        0x%4.4"   PRIx32, tpm2->reserved);
+	fwts_log_info_verbatum(fw, "  Address of Control Area:         0x%16.16" PRIx64, tpm2->address_of_control_area);
+	fwts_log_info_verbatum(fw, "  Start Method:                    0x%8.8"   PRIx32, tpm2->start_method);
+
+	if (tpm2->platform_class != 0 && tpm2->platform_class != 1) {
+		passed = false;
+		fwts_failed(fw, LOG_LEVEL_HIGH,
+			"TPM2BadPlatformClass",
+			"TPM2's platform class must be zero (client) or one (server), got 0x%" PRIx16,
+			tpm2->platform_class);
+	}
+
+	if (tpm2->reserved != 0) {
+		passed = false;
+		fwts_failed(fw, LOG_LEVEL_LOW,
+			"TPM2ReservedNonZero",
+			"TPM2 reserved field must be zero, got "
+			"0x%4.4" PRIx16 " instead", tpm2->reserved);
+	}
+
+	if (tpm2->start_method < 1 || tpm2->start_method >= 9) {
+		passed = false;
+		fwts_failed(fw, LOG_LEVEL_HIGH,
+			"TPM2BadStartMethod",
+			"TPM2's Start Method must be between one to eight, got 0x%" PRIx16,
+			tpm2->start_method);
+	}
+
+	if (tpm2->start_method == 2 && table->length != sizeof(fwts_acpi_table_tpm2) + 4) {
+		passed = false;
+		fwts_failed(fw, LOG_LEVEL_HIGH,
+			"TPM2BadPlatformParameters",
+			"Table length must be 0x%" PRIx32 " if Start method equals 2, got 0x%" PRIx32,
+			(uint32_t) sizeof(fwts_acpi_table_tpm2) + 4,
+			(uint32_t) table->length);
+	}
+
+	if (passed)
+		fwts_passed(fw, "No issues found in TPM2 table.");
+
+	return FWTS_OK;
+}
+
+static fwts_framework_minor_test tpm2_tests[] = {
+	{ tpm2_test1, "Validate TPM2 table." },
+	{ NULL, NULL }
+};
+
+static fwts_framework_ops tpm2_ops = {
+	.description = "TPM2 Trusted Platform Module 2 test.",
+	.init        = tpm2_init,
+	.minor_tests = tpm2_tests
+};
+
+FWTS_REGISTER("tpm2", &tpm2_ops, FWTS_TEST_ANYTIME, FWTS_FLAG_BATCH | FWTS_FLAG_TEST_ACPI)
diff --git a/src/lib/include/fwts_acpi.h b/src/lib/include/fwts_acpi.h
index c113dd1..61f7129 100644
--- a/src/lib/include/fwts_acpi.h
+++ b/src/lib/include/fwts_acpi.h
@@ -535,6 +535,15 @@ typedef struct {
 	};
 }  __attribute__ ((packed)) fwts_acpi_table_tcpa;
 
+typedef struct {
+	fwts_acpi_table_header	header;
+	uint16_t	platform_class;
+	uint16_t	reserved;
+	uint64_t	address_of_control_area;
+	uint32_t	start_method;
+	uint8_t		platform_specific_parameters[0];
+}  __attribute__ ((packed)) fwts_acpi_table_tpm2;
+
 /* From http://wiki.xenproject.org/mediawiki/images/c/c4/Xen-environment-table.pdf */
 typedef struct {
 	fwts_acpi_table_header	header;
-- 
1.9.1