1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * IRQ routing offset tests.
4 *
5 * Copyright IBM Corp. 2026
6 *
7 * Authors:
8 * Janosch Frank <frankja@linux.ibm.com>
9 */
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <sys/ioctl.h>
14
15 #include "test_util.h"
16 #include "kvm_util.h"
17 #include "kselftest.h"
18 #include "ucall_common.h"
19
20 extern char guest_code[];
21 asm("guest_code:\n"
22 "diag %r0,%r0,0\n"
23 "j .\n");
24
test(void)25 static void test(void)
26 {
27 struct kvm_irq_routing *routing;
28 struct kvm_vcpu *vcpu;
29 struct kvm_vm *vm;
30 gpa_t mem;
31 int ret;
32
33 struct kvm_irq_routing_entry ue = {
34 .type = KVM_IRQ_ROUTING_S390_ADAPTER,
35 .gsi = 1,
36 };
37
38 vm = vm_create_with_one_vcpu(&vcpu, guest_code);
39 mem = vm_phy_pages_alloc(vm, 2, 4096 * 42, 0);
40
41 routing = kvm_gsi_routing_create();
42 routing->nr = 1;
43 routing->entries[0] = ue;
44 routing->entries[0].u.adapter.summary_addr = (uintptr_t)mem;
45 routing->entries[0].u.adapter.ind_addr = (uintptr_t)mem;
46
47 routing->entries[0].u.adapter.summary_offset = 4096 * 8;
48 ret = __vm_ioctl(vm, KVM_SET_GSI_ROUTING, routing);
49 ksft_test_result(ret == -1 && errno == EINVAL, "summary offset outside of page\n");
50
51 routing->entries[0].u.adapter.summary_offset -= 4;
52 ret = __vm_ioctl(vm, KVM_SET_GSI_ROUTING, routing);
53 ksft_test_result(ret == 0, "summary offset inside of page\n");
54
55 routing->entries[0].u.adapter.ind_offset = 4096 * 8;
56 ret = __vm_ioctl(vm, KVM_SET_GSI_ROUTING, routing);
57 ksft_test_result(ret == -1 && errno == EINVAL, "ind offset outside of page\n");
58
59 routing->entries[0].u.adapter.ind_offset -= 4;
60 ret = __vm_ioctl(vm, KVM_SET_GSI_ROUTING, routing);
61 ksft_test_result(ret == 0, "ind offset inside of page\n");
62
63 kvm_vm_free(vm);
64 }
65
main(int argc,char * argv[])66 int main(int argc, char *argv[])
67 {
68 TEST_REQUIRE(kvm_has_cap(KVM_CAP_IRQ_ROUTING));
69
70 ksft_print_header();
71 ksft_set_plan(4);
72 test();
73
74 ksft_finished(); /* Print results and exit() accordingly */
75 }
76