[PATCH 1/2] acpi: Add WAET ACPI table test (LP: #1470495)

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

Trivial table to check, just see if size is value and flags
reserved fields are zero.

Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
 src/Makefile.am             |   1 +
 src/acpi/waet/waet.c        | 100 ++++++++++++++++++++++++++++++++++++++++++++
 src/lib/include/fwts_acpi.h |   9 ++++
 3 files changed, 110 insertions(+)
 create mode 100644 src/acpi/waet/waet.c

diff --git a/src/Makefile.am b/src/Makefile.am
index e79d5f6..bba6301 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -75,6 +75,7 @@ fwts_SOURCES = main.c 				\
 	acpi/tcpa/tcpa.c 			\
 	acpi/srat/srat.c 			\
 	acpi/syntaxcheck/syntaxcheck.c 		\
+	acpi/waet/waet.c			\
 	acpi/wakealarm/wakealarm.c 		\
 	acpi/wmi/wmi.c 				\
 	acpi/xsdt/xsdt.c			\
diff --git a/src/acpi/waet/waet.c b/src/acpi/waet/waet.c
new file mode 100644
index 0000000..d709de8
--- /dev/null
+++ b/src/acpi/waet/waet.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2015 Canonical
+ *
+ * Portions of this code original from 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 "fwts.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <string.h>
+#include <alloca.h>
+
+#include "fwts_acpi_object_eval.h"
+
+static fwts_acpi_table_info *table;
+
+static int waet_init(fwts_framework *fw)
+{
+	if (fwts_acpi_find_table(fw, "WAET", 0, &table) != FWTS_OK) {
+		fwts_log_error(fw, "Cannot read ACPI tables.");
+		return FWTS_ERROR;
+	}
+	if (table == NULL || (table && table->length == 0)) {
+		fwts_log_error(fw, "ACPI WAET table does not exist, skipping test");
+		return FWTS_SKIP;
+	}
+
+	return FWTS_OK;
+}
+
+/*
+ *  WAET Windows ACPI Emulated Devices Table
+ *   see http://msdn.microsoft.com/en-us/windows/hardware/gg487524.aspx
+ */
+static int waet_test1(fwts_framework *fw)
+{
+	bool passed = true;
+	fwts_acpi_table_waet *waet = (fwts_acpi_table_waet *)table->data;
+
+	/* Enough length for the initial waet header? */
+	if (table->length < sizeof(fwts_acpi_table_waet)) {
+		passed = false;
+		fwts_failed(fw, LOG_LEVEL_HIGH,
+			"WAETTooShort",
+			"WAET table too short, expecting %zu bytes, "
+			"instead got %zu bytes",
+			sizeof(fwts_acpi_table_waet), table->length);
+		goto done;
+	}
+
+	fwts_log_info_verbatum(fw, "WAET Table:");
+	fwts_log_info_verbatum(fw, "  Emulated Device Flags:    0x%8.8" PRIx32, waet->flags);
+	fwts_log_info_verbatum(fw, "    Bit [0] RTC Good:       %1" PRIu32, waet->flags & 1);
+	fwts_log_info_verbatum(fw, "    Bit [1] PM Timer Good:  %1" PRIu32, (waet->flags >> 1) & 1);
+	fwts_log_nl(fw);
+
+	if (waet->flags & ~3) {
+		passed = false;
+		fwts_failed(fw, LOG_LEVEL_HIGH,
+			"WAETFlagReservedNotZero",
+			"WAET Emulated Device Flags was 0x%" PRIx32
+			" and so some of reserved bits [31:2] are not zero "
+			" as expected.", waet->flags);
+	}
+done:
+	if (passed)
+		fwts_passed(fw, "No issues found in WAET table.");
+
+	return FWTS_OK;
+}
+
+static fwts_framework_minor_test waet_tests[] = {
+	{ waet_test1, "Windows ACPI Emulated Devices Table test." },
+	{ NULL, NULL }
+};
+
+static fwts_framework_ops waet_ops = {
+	.description = "Windows ACPI Emulated Devices Table test.",
+	.init        = waet_init,
+	.minor_tests = waet_tests
+};
+
+FWTS_REGISTER("waet", &waet_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 1acbaef..5706e2f 100644
--- a/src/lib/include/fwts_acpi.h
+++ b/src/lib/include/fwts_acpi.h
@@ -1123,4 +1123,13 @@ typedef struct {
 	/* followed by 1 or more LPI structure types */
 } __attribute__ ((packed)) fwts_acpi_table_lpit;
 
+/*
+ *  Windows ACPI Emulated Devices Table
+ *    http://msdn.microsoft.com/en-us/windows/hardware/gg487524.aspx
+ */
+typedef struct {
+	fwts_acpi_table_header  header;
+	uint32_t	flags;
+} __attribute__ ((packed)) fwts_acpi_table_waet;
+
 #endif
-- 
2.1.4