diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 492e937fab00..8a240d20ec5e 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -153,6 +153,7 @@ TEST_GEN_PROGS_aarch64 += aarch64/smccc_filter
 TEST_GEN_PROGS_aarch64 += aarch64/vcpu_width_config
 TEST_GEN_PROGS_aarch64 += aarch64/vgic_init
 TEST_GEN_PROGS_aarch64 += aarch64/vgic_irq
+TEST_GEN_PROGS_aarch64 += aarch64/vgic_lpi_stress
 TEST_GEN_PROGS_aarch64 += aarch64/vpmu_counter_access
 TEST_GEN_PROGS_aarch64 += access_tracking_perf_test
 TEST_GEN_PROGS_aarch64 += demand_paging_test
diff --git a/tools/testing/selftests/kvm/aarch64/vgic_lpi_stress.c b/tools/testing/selftests/kvm/aarch64/vgic_lpi_stress.c
new file mode 100644
index 000000000000..d557d907728a
--- /dev/null
+++ b/tools/testing/selftests/kvm/aarch64/vgic_lpi_stress.c
@@ -0,0 +1,388 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * vgic_lpi_stress - Stress test for KVM's ITS emulation
+ *
+ * Copyright (c) 2024 Google LLC
+ */
+
+#include <linux/sizes.h>
+#include <pthread.h>
+#include <sys/sysinfo.h>
+
+#include "kvm_util.h"
+#include "gic.h"
+#include "gic_v3.h"
+#include "processor.h"
+#include "ucall.h"
+#include "vgic.h"
+
+#define TEST_MEMSLOT_INDEX	1
+
+#define GIC_LPI_OFFSET	8192
+
+static u32 nr_vcpus = 1;
+static u32 nr_devices = 1;
+static u32 nr_event_ids = 16;
+static size_t nr_iterations = 1000;
+static vm_paddr_t gpa_base;
+
+static struct kvm_vm *vm;
+static struct kvm_vcpu **vcpus;
+static struct vgic_its *its;
+static int gic_fd;
+
+static bool request_vcpus_stop;
+
+static void guest_irq_handler(struct ex_regs *regs)
+{
+	u32 intid = gic_get_and_ack_irq();
+
+	if (intid == IAR_SPURIOUS)
+		return;
+
+	GUEST_ASSERT(intid >= GIC_LPI_OFFSET);
+	gic_set_eoi(intid);
+}
+
+static void guest_code(size_t nr_lpis)
+{
+	gic_init(GIC_V3, nr_vcpus);
+
+	GUEST_SYNC(0);
+
+	/*
+	 * Don't use WFI here to avoid blocking the vCPU thread indefinitely and
+	 * never getting the stop singal.
+	 */
+	while (!READ_ONCE(request_vcpus_stop))
+		cpu_relax();
+
+	GUEST_DONE();
+}
+
+static void setup_memslot(void)
+{
+	size_t pages;
+	size_t sz;
+
+	/*
+	 * For the ITS:
+	 *  - A single level device table
+	 *  - A single level collection table
+	 *  - The command queue
+	 *  - An ITT for each device
+	 */
+	sz = (3 + nr_devices) * SZ_64K;
+
+	/*
+	 * For the redistributors:
+	 *  - A shared LPI configuration table
+	 *  - An LPI pending table for each vCPU
+	 */
+	sz += (1 + nr_vcpus) * SZ_64K;
+
+	pages = sz / vm->page_size;
+	gpa_base = ((vm_compute_max_gfn(vm) + 1) * vm->page_size) - sz;
+	vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, gpa_base,
+				    TEST_MEMSLOT_INDEX, pages, 0);
+}
+
+#define LPI_PROP_DEFAULT_PRIO	0xa0
+
+static void configure_lpis(vm_paddr_t prop_table)
+{
+	u8 *tbl = addr_gpa2hva(vm, prop_table);
+	size_t i;
+
+	for (i = 0; i < (nr_devices * nr_event_ids); i++) {
+		tbl[i] = LPI_PROP_DEFAULT_PRIO |
+			 LPI_PROP_GROUP1 |
+			 LPI_PROP_ENABLED;
+	}
+}
+
+static void setup_gic(void)
+{
+	vm_paddr_t coll_table, device_table, cmdq_base;
+
+	gic_fd = vgic_v3_setup(vm, nr_vcpus, 64);
+	__TEST_REQUIRE(gic_fd >= 0, "Failed to create GICv3");
+
+	coll_table = vm_phy_pages_alloc_aligned(vm, SZ_64K / vm->page_size,
+						gpa_base, TEST_MEMSLOT_INDEX);
+	device_table = vm_phy_pages_alloc_aligned(vm, SZ_64K / vm->page_size,
+						  gpa_base, TEST_MEMSLOT_INDEX);
+	cmdq_base = vm_phy_pages_alloc_aligned(vm, SZ_64K / vm->page_size,
+					       gpa_base, TEST_MEMSLOT_INDEX);
+
+	its = vgic_its_setup(vm, coll_table, SZ_64K,
+			     device_table, SZ_64K, cmdq_base, SZ_64K);
+}
+
+static void setup_its_mappings(void)
+{
+	u32 coll_id, device_id, event_id, intid = GIC_LPI_OFFSET;
+
+	for (coll_id = 0; coll_id < nr_vcpus; coll_id++)
+		vgic_its_send_mapc_cmd(its, vcpus[coll_id], coll_id, true);
+
+	/* Round-robin the LPIs to all of the vCPUs in the VM */
+	coll_id = 0;
+	for (device_id = 0; device_id < nr_devices; device_id++) {
+		vm_paddr_t itt_base = vm_phy_pages_alloc_aligned(vm, SZ_64K / vm->page_size,
+								 gpa_base, TEST_MEMSLOT_INDEX);
+
+		vgic_its_send_mapd_cmd(its, device_id, itt_base, SZ_64K, true);
+
+		for (event_id = 0; event_id < nr_event_ids; event_id++) {
+			vgic_its_send_mapti_cmd(its, device_id, event_id, coll_id,
+						intid++);
+
+			coll_id = (coll_id + 1) % nr_vcpus;
+		}
+	}
+}
+
+static void setup_rdists_for_lpis(void)
+{
+	size_t i;
+
+	vm_paddr_t prop_table = vm_phy_pages_alloc_aligned(vm, SZ_64K / vm->page_size,
+							   gpa_base, TEST_MEMSLOT_INDEX);
+
+	configure_lpis(prop_table);
+
+	for (i = 0; i < nr_vcpus; i++) {
+		vm_paddr_t pend_table;
+
+		pend_table = vm_phy_pages_alloc_aligned(vm, SZ_64K / vm->page_size,
+							gpa_base, TEST_MEMSLOT_INDEX);
+
+		vgic_rdist_enable_lpis(gic_fd, vcpus[i], prop_table, SZ_64K, pend_table);
+	}
+}
+
+static void invalidate_all_rdists(void)
+{
+	int i;
+
+	for (i = 0; i < nr_vcpus; i++)
+		vgic_its_send_invall_cmd(its, i);
+}
+
+static void signal_lpi(u32 device_id, u32 event_id)
+{
+	vm_paddr_t db_addr = GITS_BASE_GPA + GITS_TRANSLATER;
+
+	struct kvm_msi msi = {
+		.address_lo	= db_addr,
+		.address_hi	= db_addr >> 32,
+		.data		= event_id,
+		.devid		= device_id,
+		.flags		= KVM_MSI_VALID_DEVID,
+	};
+
+	/*
+	 * KVM_SIGNAL_MSI returns 1 if the MSI wasn't 'blocked' by the VM,
+	 * which for arm64 implies having a valid translation in the ITS.
+	 */
+	TEST_ASSERT(__vm_ioctl(vm, KVM_SIGNAL_MSI, &msi) == 1,
+		    "KVM_SIGNAL_MSI ioctl failed");
+}
+
+static pthread_barrier_t test_setup_barrier;
+static pthread_barrier_t test_start_barrier;
+
+static void *lpi_worker_thread(void *data)
+{
+	u32 device_id = (size_t)data;
+	u32 event_id;
+	size_t i;
+
+	pthread_barrier_wait(&test_start_barrier);
+
+	for (i = 0; i < nr_iterations; i++)
+		for (event_id = 0; event_id < nr_event_ids; event_id++)
+			signal_lpi(device_id, event_id);
+
+	return NULL;
+}
+
+static void *vcpu_worker_thread(void *data)
+{
+	struct kvm_vcpu *vcpu = data;
+	struct ucall uc;
+
+	while (true) {
+		vcpu_run(vcpu);
+
+		switch (get_ucall(vcpu, &uc)) {
+		case UCALL_SYNC:
+			/*
+			 * Tell the main thread to complete its last bit of
+			 * setup and wait for the signal to start the test.
+			 */
+			pthread_barrier_wait(&test_setup_barrier);
+			pthread_barrier_wait(&test_start_barrier);
+			break;
+		case UCALL_DONE:
+			return NULL;
+		case UCALL_ABORT:
+			REPORT_GUEST_ASSERT(uc);
+			break;
+		default:
+			TEST_FAIL("Unknown ucall: %lu", uc.cmd);
+		}
+	}
+
+	return NULL;
+}
+
+static void report_stats(struct timespec delta)
+{
+	u64 cache_hits, cache_misses, cache_accesses;
+	double nr_lpis;
+	double time;
+
+	nr_lpis = nr_devices * nr_event_ids * nr_iterations;
+
+	time = delta.tv_sec;
+	time += ((double)delta.tv_nsec) / NSEC_PER_SEC;
+
+	pr_info("Rate: %.2f LPIs/sec\n", nr_lpis / time);
+
+	__vm_get_stat(vm, "vgic_its_trans_cache_hit", &cache_hits, 1);
+	__vm_get_stat(vm, "vgic_its_trans_cache_miss", &cache_misses, 1);
+
+	cache_accesses = cache_hits + cache_misses;
+
+	pr_info("Translation Cache\n");
+	pr_info("  %lu hits\n", cache_hits);
+	pr_info("  %lu misses\n", cache_misses);
+	pr_info("  %.2f%% hit rate\n", 100 * (((double)cache_hits) / cache_accesses));
+}
+
+static void run_test(void)
+{
+	pthread_t *lpi_threads = malloc(nr_devices * sizeof(pthread_t));
+	pthread_t *vcpu_threads = malloc(nr_vcpus * sizeof(pthread_t));
+	struct timespec start, delta;
+	size_t i;
+
+	TEST_ASSERT(lpi_threads && vcpu_threads, "Failed to allocate pthread arrays");
+
+	/* Only the vCPU threads need to do setup before starting the VM. */
+	pthread_barrier_init(&test_setup_barrier, NULL, nr_vcpus + 1);
+	pthread_barrier_init(&test_start_barrier, NULL, nr_devices + nr_vcpus + 1);
+
+	for (i = 0; i < nr_vcpus; i++)
+		pthread_create(&vcpu_threads[i], NULL, vcpu_worker_thread, vcpus[i]);
+
+	for (i = 0; i < nr_devices; i++)
+		pthread_create(&lpi_threads[i], NULL, lpi_worker_thread, (void *)i);
+
+	pthread_barrier_wait(&test_setup_barrier);
+
+	/*
+	 * Setup LPIs for the VM after the guest has initialized the GIC. Yes,
+	 * this is weird to be doing in userspace, but creating ITS translations
+	 * requires allocating an ITT for every device.
+	 */
+	setup_rdists_for_lpis();
+	setup_its_mappings();
+	invalidate_all_rdists();
+
+	clock_gettime(CLOCK_MONOTONIC, &start);
+	pthread_barrier_wait(&test_start_barrier);
+
+	for (i = 0; i < nr_devices; i++)
+		pthread_join(lpi_threads[i], NULL);
+
+	delta = timespec_elapsed(start);
+	write_guest_global(vm, request_vcpus_stop, true);
+
+	for (i = 0; i < nr_vcpus; i++)
+		pthread_join(vcpu_threads[i], NULL);
+
+	report_stats(delta);
+}
+
+static void setup_vm(void)
+{
+	int i;
+
+	vcpus = malloc(nr_vcpus * sizeof(struct kvm_vcpu));
+	TEST_ASSERT(vcpus, "Failed to allocate vCPU array");
+
+	vm = vm_create_with_vcpus(nr_vcpus, guest_code, vcpus);
+
+	vm_init_descriptor_tables(vm);
+	for (i = 0; i < nr_vcpus; i++)
+		vcpu_init_descriptor_tables(vcpus[i]);
+
+	vm_install_exception_handler(vm, VECTOR_IRQ_CURRENT, guest_irq_handler);
+
+	setup_memslot();
+
+	setup_gic();
+
+	/* gic_init() demands the number of vCPUs in the VM */
+	sync_global_to_guest(vm, nr_vcpus);
+}
+
+static void destroy_vm(void)
+{
+	vgic_its_destroy(its);
+	close(gic_fd);
+	kvm_vm_free(vm);
+	free(vcpus);
+}
+
+static void pr_usage(const char *name)
+{
+	pr_info("%s [-v NR_VCPUS] [-d NR_DEVICES] [-e NR_EVENTS] [-i ITERS] -h\n", name);
+	pr_info("  -v:\tnumber of vCPUs (default: %u)\n", nr_vcpus);
+	pr_info("  -d:\tnumber of devices (default: %u)\n", nr_devices);
+	pr_info("  -e:\tnumber of event IDs per device (default: %u)\n", nr_event_ids);
+	pr_info("  -i:\tnumber of iterations (default: %lu)\n", nr_iterations);
+}
+
+int main(int argc, char **argv)
+{
+	u32 nr_threads;
+	int c;
+
+	while ((c = getopt(argc, argv, "hv:d:e:i:")) != -1) {
+		switch (c) {
+		case 'v':
+			nr_vcpus = atoi(optarg);
+			break;
+		case 'd':
+			nr_devices = atoi(optarg);
+			break;
+		case 'e':
+			nr_event_ids = atoi(optarg);
+			break;
+		case 'i':
+			nr_iterations = strtoul(optarg, NULL, 0);
+			break;
+		case 'h':
+		default:
+			pr_usage(argv[0]);
+			return 1;
+		}
+	}
+
+	nr_threads = nr_vcpus + nr_devices;
+	if (nr_threads > get_nprocs())
+		pr_info("WARNING: running %u threads on %d CPUs; performance is degraded.\n",
+			 nr_threads, get_nprocs());
+
+	setup_vm();
+
+	run_test();
+
+	destroy_vm();
+
+	return 0;
+}
