@@ -1182,11 +1182,13 @@ static void sch_handle_start_func_virtual(SubchDev *sch)
static IOInstEnding sch_handle_clear_func_passthrough(SubchDev *sch)
{
+ trace_css_handle_clear_pt(sch->cssid, sch->ssid, sch->schid);
return s390_ccw_cmd_request(sch);
}
static IOInstEnding sch_handle_halt_func_passthrough(SubchDev *sch)
{
+ trace_css_handle_halt_pt(sch->cssid, sch->ssid, sch->schid);
return s390_ccw_cmd_request(sch);
}
@@ -1197,6 +1199,8 @@ static IOInstEnding sch_handle_start_func_passthrough(SubchDev *sch)
SCSW *s = &sch->curr_status.scsw;
ORB *orb = &sch->orb;
+
+ trace_css_handle_start_pt(sch->cssid, sch->ssid, sch->schid);
if (!(s->ctrl & SCSW_ACTL_SUSP)) {
assert(orb != NULL);
p->intparm = orb->intparm;
@@ -1252,6 +1256,7 @@ IOInstEnding do_subchannel_work_passthrough(SubchDev *sch)
} else {
if (sch_handle_clear_func_passthrough(sch) == IOINST_OPNOTSUPP) {
no_halt_clear = true;
+ trace_css_no_haltclear_pt();
sch_handle_halt_func(sch);
}
}
@@ -1260,6 +1265,7 @@ IOInstEnding do_subchannel_work_passthrough(SubchDev *sch)
sch_handle_halt_func(sch);
} else {
if (sch_handle_halt_func_passthrough(sch) == IOINST_OPNOTSUPP) {
+ trace_css_no_haltclear_pt();
no_halt_clear = true;
sch_handle_halt_func(sch);
}
@@ -9,6 +9,10 @@ css_assign_subch(const char *do_assign, uint8_t cssid, uint8_t ssid, uint16_t sc
css_io_interrupt(int cssid, int ssid, int schid, uint32_t intparm, uint8_t isc, const char *conditional) "CSS: I/O interrupt on sch %x.%x.%04x (intparm 0x%08x, isc 0x%x) %s"
css_adapter_interrupt(uint8_t isc) "CSS: adapter I/O interrupt (isc 0x%x)"
css_do_sic(uint16_t mode, uint8_t isc) "CSS: set interruption mode 0x%x on isc 0x%x"
+css_handle_clear_pt(int cssid, int ssid, int schid) "CSS: handling clear function for pass-through subchannel %x.%x.%04x"
+css_handle_halt_pt(int cssid, int ssid, int schid) "CSS: handling halt function for pass-through subchannel %x.%x.%04x"
+css_handle_start_pt(int cssid, int ssid, int schid) "CSS: handling start function for pass-through subchannel %x.%x.%04x"
+css_no_haltclear_pt(void) "CSS: no kernel support for halt/clear function passthrough handling, falling back to emulation"
# hw/s390x/virtio-ccw.c
virtio_ccw_interpret_ccw(int cssid, int ssid, int schid, int cmd_code) "VIRTIO-CCW: %x.%x.%04x: interpret command 0x%x"
...so we can get more easily an idea whether halt/clear is sent to the device or emulated. Signed-off-by: Cornelia Huck <cohuck@redhat.com> --- hw/s390x/css.c | 6 ++++++ hw/s390x/trace-events | 4 ++++ 2 files changed, 10 insertions(+)