efi_selftest: unit test for event groups

Supply a unit test for event groups.

Create multiple events in an event group. Signal each event once and check
that all events are notified once in each round.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

lib/efi_selftest/Makefile

@@ -19,6 +19,7 @@ efi_selftest_controllers.o \
 efi_selftest_console.o \
 efi_selftest_devicepath.o \
 efi_selftest_events.o \
+efi_selftest_event_groups.o \
 efi_selftest_exitbootservices.o \
 efi_selftest_fdt.o \
 efi_selftest_gop.o \

lib/efi_selftest/efi_selftest_event_groups.c

@@ -0,0 +1,140 @@
+/*
+ * efi_selftest_event_groups
+ *
+ * Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ *
+ * This test checks the notification of group events and the
+ * following services:
+ * CreateEventEx, CloseEvent, SignalEvent, CheckEvent.
+ */
+
+#include <efi_selftest.h>
+
+#define GROUP_SIZE 16
+
+static struct efi_boot_services *boottime;
+static efi_guid_t event_group =
+	EFI_GUID(0x2335905b, 0xc3b9, 0x4221, 0xa3, 0x71,
+		 0x0e, 0x5b, 0x45, 0xc0, 0x56, 0x91);
+
+/*
+ * Notification function, increments the notfication count if parameter
+ * context is provided.
+ *
+ * @event	notified event
+ * @context	pointer to the notification count
+ */
+static void EFIAPI notify(struct efi_event *event, void *context)
+{
+	unsigned int *count = context;
+
+	if (count)
+		++*count;
+}
+
+/*
+ * Setup unit test.
+ *
+ * @handle:	handle of the loaded image
+ * @systable:	system table
+ * @return:	EFI_ST_SUCCESS for success
+ */
+static int setup(const efi_handle_t handle,
+		 const struct efi_system_table *systable)
+{
+	boottime = systable->boottime;
+
+	return EFI_ST_SUCCESS;
+}
+
+/*
+ * Execute unit test.
+ *
+ * Create multiple events in an event group. Signal each event once and check
+ * that all events are notified once in each round.
+ *
+ * @return:	EFI_ST_SUCCESS for success
+ */
+static int execute(void)
+{
+	unsigned int counter[GROUP_SIZE] = {0};
+	struct efi_event *events[GROUP_SIZE];
+	size_t i, j;
+	efi_status_t ret;
+
+	for (i = 0; i < GROUP_SIZE; ++i) {
+		ret = boottime->create_event_ex(0, TPL_NOTIFY,
+						notify, (void *)&counter[i],
+						&event_group, &events[i]);
+		if (ret != EFI_SUCCESS) {
+			efi_st_error("Failed to create event\n");
+			return EFI_ST_FAILURE;
+		}
+	}
+
+	for (i = 0; i < GROUP_SIZE; ++i) {
+		ret = boottime->signal_event(events[i]);
+		if (ret != EFI_SUCCESS) {
+			efi_st_error("Failed to signal event\n");
+			return EFI_ST_FAILURE;
+		}
+		for (j = 0; j < GROUP_SIZE; ++j) {
+			if (counter[j] != i) {
+				efi_st_printf("i %u, j %u, count %u\n",
+					      (unsigned int)i, (unsigned int)j,
+					      (unsigned int)counter[j]);
+				efi_st_error(
+					"Notification function was called\n");
+				return EFI_ST_FAILURE;
+			}
+			/* Clear signaled state */
+			ret = boottime->check_event(events[j]);
+			if (ret != EFI_SUCCESS) {
+				efi_st_error("Event was not signaled\n");
+				return EFI_ST_FAILURE;
+			}
+			if (counter[j] != i) {
+				efi_st_printf("i %u, j %u, count %u\n",
+					      (unsigned int)i, (unsigned int)j,
+					      (unsigned int)counter[j]);
+				efi_st_error(
+					"Notification function was called\n");
+				return EFI_ST_FAILURE;
+			}
+			/* Call notification function  */
+			ret = boottime->check_event(events[j]);
+			if (ret != EFI_NOT_READY) {
+				efi_st_error(
+					"Signaled state not cleared\n");
+				return EFI_ST_FAILURE;
+			}
+			if (counter[j] != i + 1) {
+				efi_st_printf("i %u, j %u, count %u\n",
+					      (unsigned int)i, (unsigned int)j,
+					      (unsigned int)counter[j]);
+				efi_st_error(
+					"Nofification function not called\n");
+				return EFI_ST_FAILURE;
+			}
+		}
+	}
+
+	for (i = 0; i < GROUP_SIZE; ++i) {
+		ret = boottime->close_event(events[i]);
+		if (ret != EFI_SUCCESS) {
+			efi_st_error("Failed to close event\n");
+			return EFI_ST_FAILURE;
+		}
+	}
+
+	return EFI_ST_SUCCESS;
+}
+
+EFI_UNIT_TEST(eventgoups) = {
+	.name = "event groups",
+	.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
+	.setup = setup,
+	.execute = execute,
+};