diff options
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/sync_regs_test.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c index 13ac3ae8e704..e4ff2eaad7cd 100644 --- a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c +++ b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c @@ -82,6 +82,27 @@ static void compare_vcpu_events(struct kvm_vcpu_events *left, #define INVALID_SYNC_FIELD 0x80000000 /* + * Set an invalid exception vector while KVM is processing events. KVM is + * supposed to reject any vector >= 32, as well as NMIs (vector 2). + */ +static void *race_events_exc(void *arg) +{ + struct kvm_run *run = (struct kvm_run *)arg; + struct kvm_vcpu_events *events = &run->s.regs.events; + + for (;;) { + WRITE_ONCE(run->kvm_dirty_regs, KVM_SYNC_X86_EVENTS); + WRITE_ONCE(events->flags, 0); + WRITE_ONCE(events->exception.pending, 1); + WRITE_ONCE(events->exception.nr, 255); + + pthread_testcancel(); + } + + return NULL; +} + +/* * Toggle CR4.PAE while KVM is processing SREGS, EFER.LME=1 with CR4.PAE=0 is * illegal, and KVM's MMU heavily relies on vCPU state being valid. */ @@ -289,6 +310,7 @@ int main(int argc, char *argv[]) kvm_vm_free(vm); race_sync_regs(race_sregs_cr4); + race_sync_regs(race_events_exc); return 0; } |