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> Cc: Paolo Bonzini <pbonz...@redhat.com> Cc: Andreas Färber <afaer...@suse.de> --- tests/libqtest.c | 19 +++++++++++++++++++ tests/libqtest.h | 40 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 59 insertions(+) diff --git a/tests/libqtest.c b/tests/libqtest.c index 098af6aec4..85e1f6f92a 100644 --- a/tests/libqtest.c +++ b/tests/libqtest.c @@ -40,6 +40,7 @@ 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 */ bool big_endian; @@ -233,6 +234,7 @@ QTestState *qtest_init_without_qmp_handshake(bool use_oob, s->rx = g_string_new(""); for (i = 0; i < MAX_IRQ; i++) { s->irq_level[i] = false; + s->irq_latch[i] = false; } if (getenv("QTEST_STOP")) { @@ -386,6 +388,7 @@ redo: if (strcmp(words[1], "raise") == 0) { s->irq_level[irq] = true; + s->irq_latch[irq] = true; } else { s->irq_level[irq] = false; } @@ -678,6 +681,22 @@ 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 ac52872cbe..721dd50863 100644 --- a/tests/libqtest.h +++ b/tests/libqtest.h @@ -192,6 +192,24 @@ char *qtest_hmpv(QTestState *s, const char *fmt, va_list ap); 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. @@ -638,6 +656,28 @@ 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. * -- 2.11.0