It is only possible to retrieve the current state of an interrupt line. But
there are devices which just pulses the interrupt line. Introduce a latch
which is set by qtest and which can be cleared by the test case.
Signed-off-by: Michael Walle <mich...@walle.cc>
---
tests/libqtest.c | 19 +++++++++++++++++++
tests/libqtest.h | 40 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 59 insertions(+)
diff --git a/tests/libqtest.c b/tests/libqtest.c
index 9a92aa7..4707e9c 100644
--- a/tests/libqtest.c
+++ b/tests/libqtest.c
@@ -44,6 +44,7 @@ struct QTestState
int fd;
int qmp_fd;
bool irq_level[MAX_IRQ];
+ bool irq_latch[MAX_IRQ];
GString *rx;
pid_t qemu_pid; /* our child QEMU process */
struct sigaction sigact_old; /* restored on exit */
@@ -194,6 +195,7 @@ QTestState *qtest_init(const char *extra_args)
s->rx = g_string_new("");
for (i = 0; i < MAX_IRQ; i++) {
s->irq_level[i] = false;
+ s->irq_latch[i] = false;
}
/* Read the QMP greeting and then do the handshake */
@@ -314,6 +316,7 @@ redo:
if (strcmp(words[1], "raise") == 0) {
s->irq_level[irq] = true;
+ s->irq_latch[irq] = true;
} else {
s->irq_level[irq] = false;
}
@@ -466,6 +469,22 @@ bool qtest_get_irq(QTestState *s, int num)
return s->irq_level[num];
}
+bool qtest_get_irq_latched(QTestState *s, int num)
+{
+ g_assert_cmpint(num, <, MAX_IRQ);
+
+ /* dummy operation in order to make sure irq is up to date */
+ qtest_inb(s, 0);
+
+ return s->irq_latch[num];
+}
+
+void qtest_clear_irq_latch(QTestState *s, int num)
+{
+ g_assert_cmpint(num, <, MAX_IRQ);
+ s->irq_latch[num] = false;
+}
+
static int64_t qtest_clock_rsp(QTestState *s)
{
gchar **words;
diff --git a/tests/libqtest.h b/tests/libqtest.h
index e7413d5..8d21986 100644
--- a/tests/libqtest.h
+++ b/tests/libqtest.h
@@ -101,6 +101,24 @@ QDict *qtest_qmp_receive(QTestState *s);
bool qtest_get_irq(QTestState *s, int num);
/**
+ * qtest_get_irq_latched:
+ * @s: #QTestState instance to operate on.
+ * @num: Interrupt to observe.
+ *
+ * Returns: The latched state of the @num interrupt.
+ */
+bool qtest_get_irq_latched(QTestState *s, int num);
+
+/**
+ * qtest_clear_irq_latch:
+ * @s: #QTestState instance to operate on.
+ * @num: Interrupt to operate on.
+ *
+ * Clears the latch of the @num interrupt.
+ */
+void qtest_clear_irq_latch(QTestState *s, int num);
+
+/**
* qtest_irq_intercept_in:
* @s: #QTestState instance to operate on.
* @string: QOM path of a device.
@@ -408,6 +426,28 @@ static inline bool get_irq(int num)
}
/**
+ * get_irq_latched:
+ * @num: Interrupt to observe.
+ *
+ * Returns: The latched level of the @num interrupt.
+ */
+static inline bool get_irq_latched(int num)
+{
+ return qtest_get_irq_latched(global_qtest, num);
+}
+
+/**
+ * clear_irq_latch:
+ * @num: Interrupt to operate on.
+ *
+ * Clears the latch of the @num interrupt.
+ */
+static inline void clear_irq_latch(int num)
+{
+ return qtest_clear_irq_latch(global_qtest, num);
+}
+
+/**
* irq_intercept_in:
* @string: QOM path of a device.
*
--
2.1.4
