// SPDX-License-Identifier: GPL-2.0-only /* * IRQ routing offset tests. * * Copyright IBM Corp. 2026 * * Authors: * Janosch Frank <frankja@linux.ibm.com> */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/ioctl.h> #include "test_util.h" #include "kvm_util.h" #include "kselftest.h" #include "ucall_common.h" extern char guest_code[]; asm("guest_code:\n" "diag %r0,%r0,0\n" "j .\n"); static void test(void) { struct kvm_irq_routing *routing; struct kvm_vcpu *vcpu; struct kvm_vm *vm; vm_paddr_t mem; int ret; struct kvm_irq_routing_entry ue = { .type = KVM_IRQ_ROUTING_S390_ADAPTER, .gsi = 1, }; vm = vm_create_with_one_vcpu(&vcpu, guest_code); mem = vm_phy_pages_alloc(vm, 2, 4096 * 42, 0); routing = kvm_gsi_routing_create(); routing->nr = 1; routing->entries[0] = ue; routing->entries[0].u.adapter.summary_addr = (uintptr_t)mem; routing->entries[0].u.adapter.ind_addr = (uintptr_t)mem; routing->entries[0].u.adapter.summary_offset = 4096 * 8; ret = __vm_ioctl(vm, KVM_SET_GSI_ROUTING, routing); ksft_test_result(ret == -1 && errno == EINVAL, "summary offset outside of page\n"); routing->entries[0].u.adapter.summary_offset -= 4; ret = __vm_ioctl(vm, KVM_SET_GSI_ROUTING, routing); ksft_test_result(ret == 0, "summary offset inside of page\n"); routing->entries[0].u.adapter.ind_offset = 4096 * 8; ret = __vm_ioctl(vm, KVM_SET_GSI_ROUTING, routing); ksft_test_result(ret == -1 && errno == EINVAL, "ind offset outside of page\n"); routing->entries[0].u.adapter.ind_offset -= 4; ret = __vm_ioctl(vm, KVM_SET_GSI_ROUTING, routing); ksft_test_result(ret == 0, "ind offset inside of page\n"); kvm_vm_free(vm); } int main(int argc, char *argv[]) { TEST_REQUIRE(kvm_has_cap(KVM_CAP_IRQ_ROUTING)); ksft_print_header(); ksft_set_plan(4); test(); ksft_finished(); /* Print results and exit() accordingly */ }