KVM: selftests: Delete dead ucall code

Delete a bunch of code related to ucall handling from
smaller_maxphyaddr_emulation_test. The only thing
smaller_maxphyaddr_emulation_test needs to check is that the vCPU exits
with UCALL_DONE after the second vcpu_run().
Signed-off-by: David Matlack <dmatlack@google.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20221102184654.282799-4-dmatlack@google.comSigned-off-by: Sean Christopherson <seanjc@google.com>

tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c

@@ -63,64 +63,6 @@ static void process_exit_on_emulation_error(struct kvm_vcpu *vcpu)
 	vcpu_regs_set(vcpu, &regs);
 }
 
-static void do_guest_assert(struct ucall *uc)
-{
-	REPORT_GUEST_ASSERT(*uc);
-}
-
-static void check_for_guest_assert(struct kvm_vcpu *vcpu)
-{
-	struct ucall uc;
-
-	if (vcpu->run->exit_reason == KVM_EXIT_IO &&
-	    get_ucall(vcpu, &uc) == UCALL_ABORT) {
-		do_guest_assert(&uc);
-	}
-}
-
-static void process_ucall_done(struct kvm_vcpu *vcpu)
-{
-	struct kvm_run *run = vcpu->run;
-	struct ucall uc;
-
-	check_for_guest_assert(vcpu);
-
-	TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
-		    "Unexpected exit reason: %u (%s)",
-		    run->exit_reason,
-		    exit_reason_str(run->exit_reason));
-
-	TEST_ASSERT(get_ucall(vcpu, &uc) == UCALL_DONE,
-		    "Unexpected ucall command: %lu, expected UCALL_DONE (%d)",
-		    uc.cmd, UCALL_DONE);
-}
-
-static uint64_t process_ucall(struct kvm_vcpu *vcpu)
-{
-	struct kvm_run *run = vcpu->run;
-	struct ucall uc;
-
-	TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
-		    "Unexpected exit reason: %u (%s)",
-		    run->exit_reason,
-		    exit_reason_str(run->exit_reason));
-
-	switch (get_ucall(vcpu, &uc)) {
-	case UCALL_SYNC:
-		break;
-	case UCALL_ABORT:
-		do_guest_assert(&uc);
-		break;
-	case UCALL_DONE:
-		process_ucall_done(vcpu);
-		break;
-	default:
-		TEST_ASSERT(false, "Unexpected ucall");
-	}
-
-	return uc.cmd;
-}
-
 int main(int argc, char *argv[])
 {
 	struct kvm_vcpu *vcpu;
@@ -156,8 +98,7 @@ int main(int argc, char *argv[])
 	vcpu_run(vcpu);
 	process_exit_on_emulation_error(vcpu);
 	vcpu_run(vcpu);
-
-	TEST_ASSERT(process_ucall(vcpu) == UCALL_DONE, "Expected UCALL_DONE");
+	ASSERT_EQ(get_ucall(vcpu, NULL), UCALL_DONE);
 
 	kvm_vm_free(vm);