1 // SPDX-License-Identifier: GPL-2.0
3  * vgic_irq.c - Test userspace injection of IRQs
36  * 0x00 (highest priority) - 0xF8 (lowest priority), in steps of 8
38  * Note that these macros will still be correct in the case that KVM implements
44 #define LOWEST_PRIO		(KVM_NUM_PRIOS - 1)
46 #define IRQ_DEFAULT_PRIO	(LOWEST_PRIO - 1)
81 	kvm_inject_call(cmd, intid, num, -1 /* not used */, expect_failure)
125 	for ((f) = (t); (f)->cmd; (f)++)
129 		if ((args)->kvm_supports_irqfd || (f)->cmd != KVM_INJECT_IRQFD)
235 	for (i = 0; i < args->nr_irqs; i++)  in reset_priorities()
266 		gic_set_priority(i, (i % (KVM_NUM_PRIOS - 1)) << 3);  in guest_inject()
289  * concurrent_irqs).  This does what a live-migration would do on the
301 	 * Set the priorities of the first (KVM_NUM_PRIOS - 1) IRQs  in guest_restore_active()
304 	for (i = 0, prio = (num - 1) * 8; i < num; i++, prio -= 8) {  in guest_restore_active()
326 		intid = num - i - 1 + first_intid;  in guest_restore_active()
328 		if (args->eoi_split)  in guest_restore_active()
368 	/* Set the priorities of the first (KVM_NUM_PRIOS - 1) IRQs  in test_inject_preemption()
371 	for (i = 0, prio = (num - 1) * step; i < num; i++, prio -= step) {  in test_inject_preemption()
386 		if (args->level_sensitive)  in test_inject_preemption()
392 		intid = num - i - 1 + first_intid;  in test_inject_preemption()
394 		if (args->eoi_split)  in test_inject_preemption()
410 	uint32_t nr_irqs = args->nr_irqs;  in test_injection()
412 	if (f->sgi) {  in test_injection()
413 		guest_inject(args, MIN_SGI, 1, f->cmd);  in test_injection()
414 		guest_inject(args, 0, 16, f->cmd);  in test_injection()
417 	if (f->ppi)  in test_injection()
418 		guest_inject(args, MIN_PPI, 1, f->cmd);  in test_injection()
420 	if (f->spi) {  in test_injection()
421 		guest_inject(args, MIN_SPI, 1, f->cmd);  in test_injection()
422 		guest_inject(args, nr_irqs - 1, 1, f->cmd);  in test_injection()
423 		guest_inject(args, MIN_SPI, nr_irqs - MIN_SPI, f->cmd);  in test_injection()
430 	uint32_t bad_intid[] = { args->nr_irqs, 1020, 1024, 1120, 5120, ~0U, };  in test_injection_failure()
434 		test_inject_fail(args, bad_intid[i], f->cmd);  in test_injection_failure()
441 	 * currently implement the ability to have more than the number-of-LRs  in test_preemption()
445 	if (f->sgi)  in test_preemption()
446 		test_inject_preemption(args, MIN_SGI, 4, f->cmd);  in test_preemption()
448 	if (f->ppi)  in test_preemption()
449 		test_inject_preemption(args, MIN_PPI, 4, f->cmd);  in test_preemption()
451 	if (f->spi)  in test_preemption()
452 		test_inject_preemption(args, MIN_SPI, 4, f->cmd);  in test_preemption()
458 	if (f->sgi)  in test_restore_active()
459 		guest_restore_active(args, MIN_SGI, 4, f->cmd);  in test_restore_active()
461 	if (f->ppi)  in test_restore_active()
462 		guest_restore_active(args, MIN_PPI, 4, f->cmd);  in test_restore_active()
464 	if (f->spi)  in test_restore_active()
465 		guest_restore_active(args, MIN_SPI, 4, f->cmd);  in test_restore_active()
470 	uint32_t i, nr_irqs = args->nr_irqs;  in guest_code()
471 	bool level_sensitive = args->level_sensitive;  in guest_code()
482 	gic_set_eoi_split(args->eoi_split);  in guest_code()
537 		 * are not level-sensitive). It only checks for intid to not  in kvm_irq_set_level_info_check()
564 		kvm_gsi_routing_irqchip_add(routing, i - MIN_SPI, i - MIN_SPI);  in kvm_set_gsi_routing_irqchip_check()
570 		/* The kernel only checks e->irqchip.pin >= KVM_IRQCHIP_NUM_PINS */  in kvm_set_gsi_routing_irqchip_check()
571 		if (((uint64_t)intid + num - 1 - MIN_SPI) >= KVM_IRQCHIP_NUM_PINS)  in kvm_set_gsi_routing_irqchip_check()
619 	 * will silently fail. And in any case, the guest will check  in kvm_routing_and_irqfd_check()
625 		TEST_ASSERT(fd[f] != -1, __KVM_SYSCALL_ERROR("eventfd()", fd[f]));  in kvm_routing_and_irqfd_check()
631 			.gsi = i - MIN_SPI,  in kvm_routing_and_irqfd_check()
648 /* handles the valid case: intid=0xffffffff num=1 */
658 	kvm_inject_cmd cmd = inject_args->cmd;  in run_guest_cmd()
659 	uint32_t intid = inject_args->first_intid;  in run_guest_cmd()
660 	uint32_t num = inject_args->num;  in run_guest_cmd()
661 	int level = inject_args->level;  in run_guest_cmd()
662 	bool expect_failure = inject_args->expect_failure;  in run_guest_cmd()
663 	struct kvm_vm *vm = vcpu->vm;  in run_guest_cmd()
667 	/* handles the valid case: intid=0xffffffff num=1 */  in run_guest_cmd()
668 	assert(intid < UINT_MAX - num || num == 1);  in run_guest_cmd()
671 	case KVM_INJECT_EDGE_IRQ_LINE:  in run_guest_cmd()
679 	case KVM_SET_IRQ_LINE:  in run_guest_cmd()
684 	case KVM_SET_IRQ_LINE_HIGH:  in run_guest_cmd()
689 	case KVM_SET_LEVEL_INFO_HIGH:  in run_guest_cmd()
694 	case KVM_INJECT_IRQFD:  in run_guest_cmd()
696 					test_args->kvm_max_routes,  in run_guest_cmd()
699 	case KVM_WRITE_ISPENDR:  in run_guest_cmd()
704 	case KVM_WRITE_ISACTIVER:  in run_guest_cmd()
719 	kvm_args_gva = uc->args[1];  in kvm_inject_get_call()
726 	printf("nr-irqs=%d level-sensitive=%d eoi-split=%d\n",  in print_args()
727 			args->nr_irqs, args->level_sensitive,  in print_args()
728 			args->eoi_split);  in print_args()
761 	__TEST_REQUIRE(gic_fd >= 0, "Failed to create vgic-v3, skipping");  in test_vgic()
770 		case UCALL_SYNC:  in test_vgic()
774 		case UCALL_ABORT:  in test_vgic()
777 		case UCALL_DONE:  in test_vgic()
793 	"usage: %s [-n num_irqs] [-e eoi_split] [-l level_sensitive]\n", name);  in help()
794 	printf(" -n: specify number of IRQs to setup the vgic with. "  in help()
796 	printf(" -e: if 1 then EOI is split into a write to DIR on top "  in help()
798 	printf(" -l: specify whether the IRQs are level-sensitive (1) or not (0).");  in help()
811 	while ((opt = getopt(argc, argv, "hn:e:l:")) != -1) {  in main()
813 		case 'n':  in main()
818 		case 'e':  in main()
822 		case 'l':  in main()
826 		case 'h':  in main()