[PATCH 1/2] acpi: add XENV table test

[Alex Hung]

Signed-off-by: Alex Hung <alex.hung at canonical.com>
---
 src/Makefile.am             |   1 +
 src/acpi/xenv/xenv.c        | 103 ++++++++++++++++++++++++++++++++++++++++++++
 src/lib/include/fwts_acpi.h |   9 ++++
 3 files changed, 113 insertions(+)
 create mode 100644 src/acpi/xenv/xenv.c

diff --git a/src/Makefile.am b/src/Makefile.am
index 7cf5125..3ee3b4e 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -81,6 +81,7 @@ fwts_SOURCES = main.c 				\
 	acpi/wakealarm/wakealarm.c 		\
 	acpi/wmi/wmi.c 				\
 	acpi/xsdt/xsdt.c			\
+	acpi/xenv/xenv.c			\
 	apic/apicedge/apicedge.c 		\
 	bios/bios_info/bios_info.c 		\
 	bios/bios32/bios32.c 			\
diff --git a/src/acpi/xenv/xenv.c b/src/acpi/xenv/xenv.c
new file mode 100644
index 0000000..c33942b
--- /dev/null
+++ b/src/acpi/xenv/xenv.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2006, Intel Corporation
+ * Copyright (C) 2010-2015 Canonical
+ *
+ * This code was originally part of the Linux-ready Firmware Developer Kit
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+#include <string.h>
+#include <inttypes.h>
+
+#include "fwts.h"
+
+static fwts_acpi_table_info *table;
+
+static int xenv_init(fwts_framework *fw)
+{
+	if (fwts_acpi_find_table(fw, "XENV", 0, &table) != FWTS_OK) {
+		fwts_log_error(fw, "Cannot load ACPI table");
+		return FWTS_ERROR;
+	}
+	if (table == NULL) {
+		fwts_log_error(fw, "ACPI XENV table does not exist, skipping test");
+		return FWTS_ERROR;
+	}
+
+	return FWTS_OK;
+}
+
+/*
+ * Sanity check XENV table, see:
+ *    http://wiki.xenproject.org/mediawiki/images/c/c4/Xen-environment-table.pdf
+ */
+static int xenv_test1(fwts_framework *fw)
+{
+	fwts_acpi_table_xenv *xenv = (fwts_acpi_table_xenv*)table->data;
+	bool passed = true;
+
+	if (table->length < sizeof(fwts_acpi_table_xenv)) {
+		fwts_failed(fw, LOG_LEVEL_HIGH, "XENVAcpiTableTooSmall",
+			"XENV ACPI table is %zd bytes long which is smaller "
+			"than the expected size of %zd bytes.",
+			table->length, sizeof(fwts_acpi_table_xenv));
+		return FWTS_ERROR;
+	}
+
+	if (xenv->header.revision != 1) {
+		passed = false;
+		fwts_failed(fw, LOG_LEVEL_HIGH,
+			"XENVBadRevision",
+			"XENV revision is incorrect, expecting 0x01, "
+			"instead got 0x%2.2" PRIx8,
+			xenv->header.revision);
+	}
+
+	fwts_log_info_verbatum(fw, "XENV Table:");
+	fwts_log_info_verbatum(fw, "  GNT Start Address                0x%16.16" PRIx64, xenv->gnt_start);
+	fwts_log_info_verbatum(fw, "  GNT Sizne                        0x%16.16" PRIx64, xenv->gnt_size);
+	fwts_log_info_verbatum(fw, "  Evtchn Intr:                     0x%8.8"   PRIx32, xenv->evtchn_intr);
+	fwts_log_info_verbatum(fw, "  Evtchn Intr Flags:               0x%2.2"   PRIx8,  xenv->evtchn_intr_flags);
+
+	if (xenv->evtchn_intr_flags & ~3) {
+		passed = false;
+		fwts_failed(fw, LOG_LEVEL_HIGH,
+			"XENVBadEvtchnIntrFlags",
+			"XENV Evtchn Intr Flags was 0x%2.2" PRIx8
+			" and reserved bits [7:2] are not zero.",
+			xenv->evtchn_intr_flags);
+	}
+
+	if (passed)
+		fwts_passed(fw, "No issues found in XENV table.");
+
+	return FWTS_OK;
+}
+
+static fwts_framework_minor_test xenv_tests[] = {
+	{ xenv_test1, "Validate XEVN table." },
+	{ NULL, NULL }
+};
+
+static fwts_framework_ops xenv_check_ops = {
+	.description = "Xen Environment Table tests.",
+	.init        = xenv_init,
+	.minor_tests = xenv_tests
+};
+
+FWTS_REGISTER("xenv", &xenv_check_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 93d3817..e4d7288 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;
 
+/* From http://wiki.xenproject.org/mediawiki/images/c/c4/Xen-environment-table.pdf */
+typedef struct {
+	fwts_acpi_table_header	header;
+	uint64_t	gnt_start;
+	uint64_t	gnt_size;
+	uint32_t	evtchn_intr;
+	uint8_t		evtchn_intr_flags;
+}  __attribute__ ((packed)) fwts_acpi_table_xenv;
+
 /* Following ASF definitions from
    http://dmtf.org/documents/asf/alert-standard-format-asf-specification-200 */
 typedef struct {
-- 
1.9.1