[PATCH v2 3/4] KVM: selftests: Use enum for test numbers in xen_shinfo_test
From: Sean Christopherson
Date: Fri Feb 03 2023 - 21:42:11 EST
From: David Woodhouse <dwmw@xxxxxxxxxxxx>
The xen_shinfo_test started off with very few iterations, and the numbers
we used in GUEST_SYNC() were precisely mapped to the RUNSTATE_xxx values
anyway to start with.
It has since grown quite a few more tests, and it's kind of awful to be
handling them all as bare numbers. Especially when I want to add a new
test in the middle. Define an enum for the test stages, and use it both
in the guest code and the host switch statement.
No functional change, if I can count to 24.
Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
.../selftests/kvm/x86_64/xen_shinfo_test.c | 133 +++++++++++-------
1 file changed, 82 insertions(+), 51 deletions(-)
diff --git a/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c b/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c
index 1380947af1fe..0459126365c9 100644
--- a/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c
+++ b/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c
@@ -44,6 +44,36 @@
#define EVTCHN_TEST2 66
#define EVTCHN_TIMER 13
+enum {
+ TEST_INJECT_VECTOR = 0,
+ TEST_RUNSTATE_runnable,
+ TEST_RUNSTATE_blocked,
+ TEST_RUNSTATE_offline,
+ TEST_RUNSTATE_ADJUST,
+ TEST_RUNSTATE_DATA,
+ TEST_STEAL_TIME,
+ TEST_EVTCHN_MASKED,
+ TEST_EVTCHN_UNMASKED,
+ TEST_EVTCHN_SLOWPATH,
+ TEST_EVTCHN_SEND_IOCTL,
+ TEST_EVTCHN_HCALL,
+ TEST_EVTCHN_HCALL_EVENTFD,
+ TEST_TIMER_SETUP,
+ TEST_TIMER_WAIT,
+ TEST_TIMER_RESTORE,
+ TEST_POLL_READY,
+ TEST_POLL_TIMEOUT,
+ TEST_POLL_MASKED,
+ TEST_POLL_WAKE,
+ TEST_TIMER_PAST,
+ TEST_LOCKING_SEND_RACE,
+ TEST_LOCKING_POLL_RACE,
+ TEST_LOCKING_POLL_TIMEOUT,
+ TEST_DONE,
+
+ TEST_GUEST_SAW_IRQ,
+};
+
#define XEN_HYPERCALL_MSR 0x40000000
#define MIN_STEAL_TIME 50000
@@ -147,7 +177,7 @@ static void evtchn_handler(struct ex_regs *regs)
vi->evtchn_pending_sel = 0;
guest_saw_irq = true;
- GUEST_SYNC(0x20);
+ GUEST_SYNC(TEST_GUEST_SAW_IRQ);
}
static void guest_wait_for_irq(void)
@@ -168,41 +198,41 @@ static void guest_code(void)
);
/* Trigger an interrupt injection */
- GUEST_SYNC(0);
+ GUEST_SYNC(TEST_INJECT_VECTOR);
guest_wait_for_irq();
/* Test having the host set runstates manually */
- GUEST_SYNC(RUNSTATE_runnable);
+ GUEST_SYNC(TEST_RUNSTATE_runnable);
GUEST_ASSERT(rs->time[RUNSTATE_runnable] != 0);
GUEST_ASSERT(rs->state == 0);
- GUEST_SYNC(RUNSTATE_blocked);
+ GUEST_SYNC(TEST_RUNSTATE_blocked);
GUEST_ASSERT(rs->time[RUNSTATE_blocked] != 0);
GUEST_ASSERT(rs->state == 0);
- GUEST_SYNC(RUNSTATE_offline);
+ GUEST_SYNC(TEST_RUNSTATE_offline);
GUEST_ASSERT(rs->time[RUNSTATE_offline] != 0);
GUEST_ASSERT(rs->state == 0);
/* Test runstate time adjust */
- GUEST_SYNC(4);
+ GUEST_SYNC(TEST_RUNSTATE_ADJUST);
GUEST_ASSERT(rs->time[RUNSTATE_blocked] == 0x5a);
GUEST_ASSERT(rs->time[RUNSTATE_offline] == 0x6b6b);
/* Test runstate time set */
- GUEST_SYNC(5);
+ GUEST_SYNC(TEST_RUNSTATE_DATA);
GUEST_ASSERT(rs->state_entry_time >= 0x8000);
GUEST_ASSERT(rs->time[RUNSTATE_runnable] == 0);
GUEST_ASSERT(rs->time[RUNSTATE_blocked] == 0x6b6b);
GUEST_ASSERT(rs->time[RUNSTATE_offline] == 0x5a);
/* sched_yield() should result in some 'runnable' time */
- GUEST_SYNC(6);
+ GUEST_SYNC(TEST_STEAL_TIME);
GUEST_ASSERT(rs->time[RUNSTATE_runnable] >= MIN_STEAL_TIME);
/* Attempt to deliver a *masked* interrupt */
- GUEST_SYNC(7);
+ GUEST_SYNC(TEST_EVTCHN_MASKED);
/* Wait until we see the bit set */
struct shared_info *si = (void *)SHINFO_VADDR;
@@ -210,21 +240,21 @@ static void guest_code(void)
__asm__ __volatile__ ("rep nop" : : : "memory");
/* Now deliver an *unmasked* interrupt */
- GUEST_SYNC(8);
+ GUEST_SYNC(TEST_EVTCHN_UNMASKED);
guest_wait_for_irq();
/* Change memslots and deliver an interrupt */
- GUEST_SYNC(9);
+ GUEST_SYNC(TEST_EVTCHN_SLOWPATH);
guest_wait_for_irq();
/* Deliver event channel with KVM_XEN_HVM_EVTCHN_SEND */
- GUEST_SYNC(10);
+ GUEST_SYNC(TEST_EVTCHN_SEND_IOCTL);
guest_wait_for_irq();
- GUEST_SYNC(11);
+ GUEST_SYNC(TEST_EVTCHN_HCALL);
/* Our turn. Deliver event channel (to ourselves) with
* EVTCHNOP_send hypercall. */
@@ -233,7 +263,7 @@ static void guest_code(void)
guest_wait_for_irq();
- GUEST_SYNC(12);
+ GUEST_SYNC(TEST_EVTCHN_HCALL_EVENTFD);
/* Deliver "outbound" event channel to an eventfd which
* happens to be one of our own irqfds. */
@@ -242,23 +272,23 @@ static void guest_code(void)
guest_wait_for_irq();
- GUEST_SYNC(13);
+ GUEST_SYNC(TEST_TIMER_SETUP);
/* Set a timer 100ms in the future. */
xen_hypercall(__HYPERVISOR_set_timer_op,
rs->state_entry_time + 100000000, NULL);
- GUEST_SYNC(14);
+ GUEST_SYNC(TEST_TIMER_WAIT);
/* Now wait for the timer */
guest_wait_for_irq();
- GUEST_SYNC(15);
+ GUEST_SYNC(TEST_TIMER_RESTORE);
/* The host has 'restored' the timer. Just wait for it. */
guest_wait_for_irq();
- GUEST_SYNC(16);
+ GUEST_SYNC(TEST_POLL_READY);
/* Poll for an event channel port which is already set */
u32 ports[1] = { EVTCHN_TIMER };
@@ -270,19 +300,19 @@ static void guest_code(void)
xen_hypercall(__HYPERVISOR_sched_op, SCHEDOP_poll, &p);
- GUEST_SYNC(17);
+ GUEST_SYNC(TEST_POLL_TIMEOUT);
/* Poll for an unset port and wait for the timeout. */
p.timeout = 100000000;
xen_hypercall(__HYPERVISOR_sched_op, SCHEDOP_poll, &p);
- GUEST_SYNC(18);
+ GUEST_SYNC(TEST_POLL_MASKED);
/* A timer will wake the masked port we're waiting on, while we poll */
p.timeout = 0;
xen_hypercall(__HYPERVISOR_sched_op, SCHEDOP_poll, &p);
- GUEST_SYNC(19);
+ GUEST_SYNC(TEST_POLL_WAKE);
/* A timer wake an *unmasked* port which should wake us with an
* actual interrupt, while we're polling on a different port. */
@@ -292,17 +322,17 @@ static void guest_code(void)
guest_wait_for_irq();
- GUEST_SYNC(20);
+ GUEST_SYNC(TEST_TIMER_PAST);
/* Timer should have fired already */
guest_wait_for_irq();
- GUEST_SYNC(21);
+ GUEST_SYNC(TEST_LOCKING_SEND_RACE);
/* Racing host ioctls */
guest_wait_for_irq();
- GUEST_SYNC(22);
+ GUEST_SYNC(TEST_LOCKING_POLL_RACE);
/* Racing vmcall against host ioctl */
ports[0] = 0;
@@ -330,12 +360,12 @@ static void guest_code(void)
* expiring while the event channel was invalid.
*/
if (!guest_saw_irq) {
- GUEST_SYNC(23);
+ GUEST_SYNC(TEST_LOCKING_POLL_TIMEOUT);
goto wait_for_timer;
}
guest_saw_irq = false;
- GUEST_SYNC(24);
+ GUEST_SYNC(TEST_DONE);
}
static int cmp_timespec(struct timespec *a, struct timespec *b)
@@ -604,25 +634,26 @@ int main(int argc, char *argv[])
"runstate times don't add up");
switch (uc.args[1]) {
- case 0:
+ case TEST_INJECT_VECTOR:
if (verbose)
printf("Delivering evtchn upcall\n");
evtchn_irq_expected = true;
vinfo->evtchn_upcall_pending = 1;
break;
- case RUNSTATE_runnable...RUNSTATE_offline:
+ case TEST_RUNSTATE_runnable...TEST_RUNSTATE_offline:
TEST_ASSERT(!evtchn_irq_expected, "Event channel IRQ not seen");
if (!do_runstate_tests)
goto done;
if (verbose)
printf("Testing runstate %s\n", runstate_names[uc.args[1]]);
rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_CURRENT;
- rst.u.runstate.state = uc.args[1];
+ rst.u.runstate.state = uc.args[1] + RUNSTATE_runnable -
+ TEST_RUNSTATE_runnable;
vcpu_ioctl(vcpu, KVM_XEN_VCPU_SET_ATTR, &rst);
break;
- case 4:
+ case TEST_RUNSTATE_ADJUST:
if (verbose)
printf("Testing RUNSTATE_ADJUST\n");
rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST;
@@ -637,7 +668,7 @@ int main(int argc, char *argv[])
vcpu_ioctl(vcpu, KVM_XEN_VCPU_SET_ATTR, &rst);
break;
- case 5:
+ case TEST_RUNSTATE_DATA:
if (verbose)
printf("Testing RUNSTATE_DATA\n");
rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA;
@@ -649,7 +680,7 @@ int main(int argc, char *argv[])
vcpu_ioctl(vcpu, KVM_XEN_VCPU_SET_ATTR, &rst);
break;
- case 6:
+ case TEST_STEAL_TIME:
if (verbose)
printf("Testing steal time\n");
/* Yield until scheduler delay exceeds target */
@@ -659,7 +690,7 @@ int main(int argc, char *argv[])
} while (get_run_delay() < rundelay);
break;
- case 7:
+ case TEST_EVTCHN_MASKED:
if (!do_eventfd_tests)
goto done;
if (verbose)
@@ -669,7 +700,7 @@ int main(int argc, char *argv[])
alarm(1);
break;
- case 8:
+ case TEST_EVTCHN_UNMASKED:
if (verbose)
printf("Testing unmasked event channel\n");
/* Unmask that, but deliver the other one */
@@ -680,7 +711,7 @@ int main(int argc, char *argv[])
alarm(1);
break;
- case 9:
+ case TEST_EVTCHN_SLOWPATH:
TEST_ASSERT(!evtchn_irq_expected,
"Expected event channel IRQ but it didn't happen");
shinfo->evtchn_pending[1] = 0;
@@ -693,7 +724,7 @@ int main(int argc, char *argv[])
alarm(1);
break;
- case 10:
+ case TEST_EVTCHN_SEND_IOCTL:
TEST_ASSERT(!evtchn_irq_expected,
"Expected event channel IRQ but it didn't happen");
if (!do_evtchn_tests)
@@ -713,7 +744,7 @@ int main(int argc, char *argv[])
alarm(1);
break;
- case 11:
+ case TEST_EVTCHN_HCALL:
TEST_ASSERT(!evtchn_irq_expected,
"Expected event channel IRQ but it didn't happen");
shinfo->evtchn_pending[1] = 0;
@@ -724,7 +755,7 @@ int main(int argc, char *argv[])
alarm(1);
break;
- case 12:
+ case TEST_EVTCHN_HCALL_EVENTFD:
TEST_ASSERT(!evtchn_irq_expected,
"Expected event channel IRQ but it didn't happen");
shinfo->evtchn_pending[0] = 0;
@@ -735,7 +766,7 @@ int main(int argc, char *argv[])
alarm(1);
break;
- case 13:
+ case TEST_TIMER_SETUP:
TEST_ASSERT(!evtchn_irq_expected,
"Expected event channel IRQ but it didn't happen");
shinfo->evtchn_pending[1] = 0;
@@ -744,7 +775,7 @@ int main(int argc, char *argv[])
printf("Testing guest oneshot timer\n");
break;
- case 14:
+ case TEST_TIMER_WAIT:
memset(&tmr, 0, sizeof(tmr));
tmr.type = KVM_XEN_VCPU_ATTR_TYPE_TIMER;
vcpu_ioctl(vcpu, KVM_XEN_VCPU_GET_ATTR, &tmr);
@@ -758,7 +789,7 @@ int main(int argc, char *argv[])
alarm(1);
break;
- case 15:
+ case TEST_TIMER_RESTORE:
TEST_ASSERT(!evtchn_irq_expected,
"Expected event channel IRQ but it didn't happen");
shinfo->evtchn_pending[0] = 0;
@@ -772,7 +803,7 @@ int main(int argc, char *argv[])
alarm(1);
break;
- case 16:
+ case TEST_POLL_READY:
TEST_ASSERT(!evtchn_irq_expected,
"Expected event channel IRQ but it didn't happen");
@@ -782,14 +813,14 @@ int main(int argc, char *argv[])
alarm(1);
break;
- case 17:
+ case TEST_POLL_TIMEOUT:
if (verbose)
printf("Testing SCHEDOP_poll timeout\n");
shinfo->evtchn_pending[0] = 0;
alarm(1);
break;
- case 18:
+ case TEST_POLL_MASKED:
if (verbose)
printf("Testing SCHEDOP_poll wake on masked event\n");
@@ -798,7 +829,7 @@ int main(int argc, char *argv[])
alarm(1);
break;
- case 19:
+ case TEST_POLL_WAKE:
shinfo->evtchn_pending[0] = shinfo->evtchn_mask[0] = 0;
if (verbose)
printf("Testing SCHEDOP_poll wake on unmasked event\n");
@@ -815,7 +846,7 @@ int main(int argc, char *argv[])
alarm(1);
break;
- case 20:
+ case TEST_TIMER_PAST:
TEST_ASSERT(!evtchn_irq_expected,
"Expected event channel IRQ but it didn't happen");
/* Read timer and check it is no longer pending */
@@ -832,7 +863,7 @@ int main(int argc, char *argv[])
alarm(1);
break;
- case 21:
+ case TEST_LOCKING_SEND_RACE:
TEST_ASSERT(!evtchn_irq_expected,
"Expected event channel IRQ but it didn't happen");
alarm(0);
@@ -854,7 +885,7 @@ int main(int argc, char *argv[])
__vm_ioctl(vm, KVM_XEN_HVM_EVTCHN_SEND, &uxe);
break;
- case 22:
+ case TEST_LOCKING_POLL_RACE:
TEST_ASSERT(!evtchn_irq_expected,
"Expected event channel IRQ but it didn't happen");
@@ -869,7 +900,7 @@ int main(int argc, char *argv[])
vcpu_ioctl(vcpu, KVM_XEN_VCPU_SET_ATTR, &tmr);
break;
- case 23:
+ case TEST_LOCKING_POLL_TIMEOUT:
/*
* Optional and possibly repeated sync point.
* Injecting the timer IRQ may fail if the
@@ -891,7 +922,7 @@ int main(int argc, char *argv[])
SHINFO_RACE_TIMEOUT * 1000000000ULL;
vcpu_ioctl(vcpu, KVM_XEN_VCPU_SET_ATTR, &tmr);
break;
- case 24:
+ case TEST_DONE:
TEST_ASSERT(!evtchn_irq_expected,
"Expected event channel IRQ but it didn't happen");
@@ -902,7 +933,7 @@ int main(int argc, char *argv[])
TEST_ASSERT(ret == 0, "pthread_join() failed: %s", strerror(ret));
goto done;
- case 0x20:
+ case TEST_GUEST_SAW_IRQ:
TEST_ASSERT(evtchn_irq_expected, "Unexpected event channel IRQ");
evtchn_irq_expected = false;
break;
--
2.39.1.519.gcb327c4b5f-goog