1 files changed, 0 insertions, 480 deletions
diff --git a/tools/testing/selftests/kvm/aarch64/arch_timer.c b/tools/testing/selftests/kvm/aarch64/arch_timer.c
deleted file mode 100644
index 274b8465b42a..000000000000
--- a/tools/testing/selftests/kvm/aarch64/arch_timer.c
+++ /dev/null
@@ -1,480 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * arch_timer.c - Tests the aarch64 timer IRQ functionality
- *
- * The test validates both the virtual and physical timer IRQs using
- * CVAL and TVAL registers. This consitutes the four stages in the test.
- * The guest's main thread configures the timer interrupt for a stage
- * and waits for it to fire, with a timeout equal to the timer period.
- * It asserts that the timeout doesn't exceed the timer period.
- *
- * On the other hand, upon receipt of an interrupt, the guest's interrupt
- * handler validates the interrupt by checking if the architectural state
- * is in compliance with the specifications.
- *
- * The test provides command-line options to configure the timer's
- * period (-p), number of vCPUs (-n), and iterations per stage (-i).
- * To stress-test the timer stack even more, an option to migrate the
- * vCPUs across pCPUs (-m), at a particular rate, is also provided.
- *
- * Copyright (c) 2021, Google LLC.
- */
-#define _GNU_SOURCE
-
-#include <stdlib.h>
-#include <pthread.h>
-#include <linux/kvm.h>
-#include <linux/sizes.h>
-#include <linux/bitmap.h>
-#include <sys/sysinfo.h>
-
-#include "kvm_util.h"
-#include "processor.h"
-#include "delay.h"
-#include "arch_timer.h"
-#include "gic.h"
-#include "vgic.h"
-
-#define NR_VCPUS_DEF			4
-#define NR_TEST_ITERS_DEF		5
-#define TIMER_TEST_PERIOD_MS_DEF	10
-#define TIMER_TEST_ERR_MARGIN_US	100
-#define TIMER_TEST_MIGRATION_FREQ_MS	2
-
-struct test_args {
-	int nr_vcpus;
-	int nr_iter;
-	int timer_period_ms;
-	int migration_freq_ms;
-	struct kvm_arm_counter_offset offset;
-};
-
-static struct test_args test_args = {
-	.nr_vcpus = NR_VCPUS_DEF,
-	.nr_iter = NR_TEST_ITERS_DEF,
-	.timer_period_ms = TIMER_TEST_PERIOD_MS_DEF,
-	.migration_freq_ms = TIMER_TEST_MIGRATION_FREQ_MS,
-	.offset = { .reserved = 1 },
-};
-
-#define msecs_to_usecs(msec)		((msec) * 1000LL)
-
-#define GICD_BASE_GPA			0x8000000ULL
-#define GICR_BASE_GPA			0x80A0000ULL
-
-enum guest_stage {
-	GUEST_STAGE_VTIMER_CVAL = 1,
-	GUEST_STAGE_VTIMER_TVAL,
-	GUEST_STAGE_PTIMER_CVAL,
-	GUEST_STAGE_PTIMER_TVAL,
-	GUEST_STAGE_MAX,
-};
-
-/* Shared variables between host and guest */
-struct test_vcpu_shared_data {
-	int nr_iter;
-	enum guest_stage guest_stage;
-	uint64_t xcnt;
-};
-
-static struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
-static pthread_t pt_vcpu_run[KVM_MAX_VCPUS];
-static struct test_vcpu_shared_data vcpu_shared_data[KVM_MAX_VCPUS];
-
-static int vtimer_irq, ptimer_irq;
-
-static unsigned long *vcpu_done_map;
-static pthread_mutex_t vcpu_done_map_lock;
-
-static void
-guest_configure_timer_action(struct test_vcpu_shared_data *shared_data)
-{
-	switch (shared_data->guest_stage) {
-	case GUEST_STAGE_VTIMER_CVAL:
-		timer_set_next_cval_ms(VIRTUAL, test_args.timer_period_ms);
-		shared_data->xcnt = timer_get_cntct(VIRTUAL);
-		timer_set_ctl(VIRTUAL, CTL_ENABLE);
-		break;
-	case GUEST_STAGE_VTIMER_TVAL:
-		timer_set_next_tval_ms(VIRTUAL, test_args.timer_period_ms);
-		shared_data->xcnt = timer_get_cntct(VIRTUAL);
-		timer_set_ctl(VIRTUAL, CTL_ENABLE);
-		break;
-	case GUEST_STAGE_PTIMER_CVAL:
-		timer_set_next_cval_ms(PHYSICAL, test_args.timer_period_ms);
-		shared_data->xcnt = timer_get_cntct(PHYSICAL);
-		timer_set_ctl(PHYSICAL, CTL_ENABLE);
-		break;
-	case GUEST_STAGE_PTIMER_TVAL:
-		timer_set_next_tval_ms(PHYSICAL, test_args.timer_period_ms);
-		shared_data->xcnt = timer_get_cntct(PHYSICAL);
-		timer_set_ctl(PHYSICAL, CTL_ENABLE);
-		break;
-	default:
-		GUEST_ASSERT(0);
-	}
-}
-
-static void guest_validate_irq(unsigned int intid,
-				struct test_vcpu_shared_data *shared_data)
-{
-	enum guest_stage stage = shared_data->guest_stage;
-	uint64_t xcnt = 0, xcnt_diff_us, cval = 0;
-	unsigned long xctl = 0;
-	unsigned int timer_irq = 0;
-	unsigned int accessor;
-
-	if (intid == IAR_SPURIOUS)
-		return;
-
-	switch (stage) {
-	case GUEST_STAGE_VTIMER_CVAL:
-	case GUEST_STAGE_VTIMER_TVAL:
-		accessor = VIRTUAL;
-		timer_irq = vtimer_irq;
-		break;
-	case GUEST_STAGE_PTIMER_CVAL:
-	case GUEST_STAGE_PTIMER_TVAL:
-		accessor = PHYSICAL;
-		timer_irq = ptimer_irq;
-		break;
-	default:
-		GUEST_ASSERT(0);
-		return;
-	}
-
-	xctl = timer_get_ctl(accessor);
-	if ((xctl & CTL_IMASK) || !(xctl & CTL_ENABLE))
-		return;
-
-	timer_set_ctl(accessor, CTL_IMASK);
-	xcnt = timer_get_cntct(accessor);
-	cval = timer_get_cval(accessor);
-
-	xcnt_diff_us = cycles_to_usec(xcnt - shared_data->xcnt);
-
-	/* Make sure we are dealing with the correct timer IRQ */
-	GUEST_ASSERT_EQ(intid, timer_irq);
-
-	/* Basic 'timer condition met' check */
-	__GUEST_ASSERT(xcnt >= cval,
-		       "xcnt = 0x%llx, cval = 0x%llx, xcnt_diff_us = 0x%llx",
-		       xcnt, cval, xcnt_diff_us);
-	__GUEST_ASSERT(xctl & CTL_ISTATUS, "xcnt = 0x%llx", xcnt);
-
-	WRITE_ONCE(shared_data->nr_iter, shared_data->nr_iter + 1);
-}
-
-static void guest_irq_handler(struct ex_regs *regs)
-{
-	unsigned int intid = gic_get_and_ack_irq();
-	uint32_t cpu = guest_get_vcpuid();
-	struct test_vcpu_shared_data *shared_data = &vcpu_shared_data[cpu];
-
-	guest_validate_irq(intid, shared_data);
-
-	gic_set_eoi(intid);
-}
-
-static void guest_run_stage(struct test_vcpu_shared_data *shared_data,
-				enum guest_stage stage)
-{
-	uint32_t irq_iter, config_iter;
-
-	shared_data->guest_stage = stage;
-	shared_data->nr_iter = 0;
-
-	for (config_iter = 0; config_iter < test_args.nr_iter; config_iter++) {
-		/* Setup the next interrupt */
-		guest_configure_timer_action(shared_data);
-
-		/* Setup a timeout for the interrupt to arrive */
-		udelay(msecs_to_usecs(test_args.timer_period_ms) +
-			TIMER_TEST_ERR_MARGIN_US);
-
-		irq_iter = READ_ONCE(shared_data->nr_iter);
-		GUEST_ASSERT_EQ(config_iter + 1, irq_iter);
-	}
-}
-
-static void guest_code(void)
-{
-	uint32_t cpu = guest_get_vcpuid();
-	struct test_vcpu_shared_data *shared_data = &vcpu_shared_data[cpu];
-
-	local_irq_disable();
-
-	gic_init(GIC_V3, test_args.nr_vcpus,
-		(void *)GICD_BASE_GPA, (void *)GICR_BASE_GPA);
-
-	timer_set_ctl(VIRTUAL, CTL_IMASK);
-	timer_set_ctl(PHYSICAL, CTL_IMASK);
-
-	gic_irq_enable(vtimer_irq);
-	gic_irq_enable(ptimer_irq);
-	local_irq_enable();
-
-	guest_run_stage(shared_data, GUEST_STAGE_VTIMER_CVAL);
-	guest_run_stage(shared_data, GUEST_STAGE_VTIMER_TVAL);
-	guest_run_stage(shared_data, GUEST_STAGE_PTIMER_CVAL);
-	guest_run_stage(shared_data, GUEST_STAGE_PTIMER_TVAL);
-
-	GUEST_DONE();
-}
-
-static void *test_vcpu_run(void *arg)
-{
-	unsigned int vcpu_idx = (unsigned long)arg;
-	struct ucall uc;
-	struct kvm_vcpu *vcpu = vcpus[vcpu_idx];
-	struct kvm_vm *vm = vcpu->vm;
-	struct test_vcpu_shared_data *shared_data = &vcpu_shared_data[vcpu_idx];
-
-	vcpu_run(vcpu);
-
-	/* Currently, any exit from guest is an indication of completion */
-	pthread_mutex_lock(&vcpu_done_map_lock);
-	__set_bit(vcpu_idx, vcpu_done_map);
-	pthread_mutex_unlock(&vcpu_done_map_lock);
-
-	switch (get_ucall(vcpu, &uc)) {
-	case UCALL_SYNC:
-	case UCALL_DONE:
-		break;
-	case UCALL_ABORT:
-		sync_global_from_guest(vm, *shared_data);
-		fprintf(stderr, "Guest assert failed,  vcpu %u; stage; %u; iter: %u\n",
-			vcpu_idx, shared_data->guest_stage, shared_data->nr_iter);
-		REPORT_GUEST_ASSERT(uc);
-		break;
-	default:
-		TEST_FAIL("Unexpected guest exit\n");
-	}
-
-	return NULL;
-}
-
-static uint32_t test_get_pcpu(void)
-{
-	uint32_t pcpu;
-	unsigned int nproc_conf;
-	cpu_set_t online_cpuset;
-
-	nproc_conf = get_nprocs_conf();
-	sched_getaffinity(0, sizeof(cpu_set_t), &online_cpuset);
-
-	/* Randomly find an available pCPU to place a vCPU on */
-	do {
-		pcpu = rand() % nproc_conf;
-	} while (!CPU_ISSET(pcpu, &online_cpuset));
-
-	return pcpu;
-}
-
-static int test_migrate_vcpu(unsigned int vcpu_idx)
-{
-	int ret;
-	cpu_set_t cpuset;
-	uint32_t new_pcpu = test_get_pcpu();
-
-	CPU_ZERO(&cpuset);
-	CPU_SET(new_pcpu, &cpuset);
-
-	pr_debug("Migrating vCPU: %u to pCPU: %u\n", vcpu_idx, new_pcpu);
-
-	ret = pthread_setaffinity_np(pt_vcpu_run[vcpu_idx],
-				     sizeof(cpuset), &cpuset);
-
-	/* Allow the error where the vCPU thread is already finished */
-	TEST_ASSERT(ret == 0 || ret == ESRCH,
-		    "Failed to migrate the vCPU:%u to pCPU: %u; ret: %d\n",
-		    vcpu_idx, new_pcpu, ret);
-
-	return ret;
-}
-
-static void *test_vcpu_migration(void *arg)
-{
-	unsigned int i, n_done;
-	bool vcpu_done;
-
-	do {
-		usleep(msecs_to_usecs(test_args.migration_freq_ms));
-
-		for (n_done = 0, i = 0; i < test_args.nr_vcpus; i++) {
-			pthread_mutex_lock(&vcpu_done_map_lock);
-			vcpu_done = test_bit(i, vcpu_done_map);
-			pthread_mutex_unlock(&vcpu_done_map_lock);
-
-			if (vcpu_done) {
-				n_done++;
-				continue;
-			}
-
-			test_migrate_vcpu(i);
-		}
-	} while (test_args.nr_vcpus != n_done);
-
-	return NULL;
-}
-
-static void test_run(struct kvm_vm *vm)
-{
-	pthread_t pt_vcpu_migration;
-	unsigned int i;
-	int ret;
-
-	pthread_mutex_init(&vcpu_done_map_lock, NULL);
-	vcpu_done_map = bitmap_zalloc(test_args.nr_vcpus);
-	TEST_ASSERT(vcpu_done_map, "Failed to allocate vcpu done bitmap\n");
-
-	for (i = 0; i < (unsigned long)test_args.nr_vcpus; i++) {
-		ret = pthread_create(&pt_vcpu_run[i], NULL, test_vcpu_run,
-				     (void *)(unsigned long)i);
-		TEST_ASSERT(!ret, "Failed to create vCPU-%d pthread\n", i);
-	}
-
-	/* Spawn a thread to control the vCPU migrations */
-	if (test_args.migration_freq_ms) {
-		srand(time(NULL));
-
-		ret = pthread_create(&pt_vcpu_migration, NULL,
-					test_vcpu_migration, NULL);
-		TEST_ASSERT(!ret, "Failed to create the migration pthread\n");
-	}
-
-
-	for (i = 0; i < test_args.nr_vcpus; i++)
-		pthread_join(pt_vcpu_run[i], NULL);
-
-	if (test_args.migration_freq_ms)
-		pthread_join(pt_vcpu_migration, NULL);
-
-	bitmap_free(vcpu_done_map);
-}
-
-static void test_init_timer_irq(struct kvm_vm *vm)
-{
-	/* Timer initid should be same for all the vCPUs, so query only vCPU-0 */
-	vcpu_device_attr_get(vcpus[0], KVM_ARM_VCPU_TIMER_CTRL,
-			     KVM_ARM_VCPU_TIMER_IRQ_PTIMER, &ptimer_irq);
-	vcpu_device_attr_get(vcpus[0], KVM_ARM_VCPU_TIMER_CTRL,
-			     KVM_ARM_VCPU_TIMER_IRQ_VTIMER, &vtimer_irq);
-
-	sync_global_to_guest(vm, ptimer_irq);
-	sync_global_to_guest(vm, vtimer_irq);
-
-	pr_debug("ptimer_irq: %d; vtimer_irq: %d\n", ptimer_irq, vtimer_irq);
-}
-
-static int gic_fd;
-
-static struct kvm_vm *test_vm_create(void)
-{
-	struct kvm_vm *vm;
-	unsigned int i;
-	int nr_vcpus = test_args.nr_vcpus;
-
-	vm = vm_create_with_vcpus(nr_vcpus, guest_code, vcpus);
-
-	vm_init_descriptor_tables(vm);
-	vm_install_exception_handler(vm, VECTOR_IRQ_CURRENT, guest_irq_handler);
-
-	if (!test_args.offset.reserved) {
-		if (kvm_has_cap(KVM_CAP_COUNTER_OFFSET))
-			vm_ioctl(vm, KVM_ARM_SET_COUNTER_OFFSET, &test_args.offset);
-		else
-			TEST_FAIL("no support for global offset\n");
-	}
-
-	for (i = 0; i < nr_vcpus; i++)
-		vcpu_init_descriptor_tables(vcpus[i]);
-
-	test_init_timer_irq(vm);
-	gic_fd = vgic_v3_setup(vm, nr_vcpus, 64, GICD_BASE_GPA, GICR_BASE_GPA);
-	__TEST_REQUIRE(gic_fd >= 0, "Failed to create vgic-v3");
-
-	/* Make all the test's cmdline args visible to the guest */
-	sync_global_to_guest(vm, test_args);
-
-	return vm;
-}
-
-static void test_vm_cleanup(struct kvm_vm *vm)
-{
-	close(gic_fd);
-	kvm_vm_free(vm);
-}
-
-static void test_print_help(char *name)
-{
-	pr_info("Usage: %s [-h] [-n nr_vcpus] [-i iterations] [-p timer_period_ms]\n",
-		name);
-	pr_info("\t-n: Number of vCPUs to configure (default: %u; max: %u)\n",
-		NR_VCPUS_DEF, KVM_MAX_VCPUS);
-	pr_info("\t-i: Number of iterations per stage (default: %u)\n",
-		NR_TEST_ITERS_DEF);
-	pr_info("\t-p: Periodicity (in ms) of the guest timer (default: %u)\n",
-		TIMER_TEST_PERIOD_MS_DEF);
-	pr_info("\t-m: Frequency (in ms) of vCPUs to migrate to different pCPU. 0 to turn off (default: %u)\n",
-		TIMER_TEST_MIGRATION_FREQ_MS);
-	pr_info("\t-o: Counter offset (in counter cycles, default: 0)\n");
-	pr_info("\t-h: print this help screen\n");
-}
-
-static bool parse_args(int argc, char *argv[])
-{
-	int opt;
-
-	while ((opt = getopt(argc, argv, "hn:i:p:m:o:")) != -1) {
-		switch (opt) {
-		case 'n':
-			test_args.nr_vcpus = atoi_positive("Number of vCPUs", optarg);
-			if (test_args.nr_vcpus > KVM_MAX_VCPUS) {
-				pr_info("Max allowed vCPUs: %u\n",
-					KVM_MAX_VCPUS);
-				goto err;
-			}
-			break;
-		case 'i':
-			test_args.nr_iter = atoi_positive("Number of iterations", optarg);
-			break;
-		case 'p':
-			test_args.timer_period_ms = atoi_positive("Periodicity", optarg);
-			break;
-		case 'm':
-			test_args.migration_freq_ms = atoi_non_negative("Frequency", optarg);
-			break;
-		case 'o':
-			test_args.offset.counter_offset = strtol(optarg, NULL, 0);
-			test_args.offset.reserved = 0;
-			break;
-		case 'h':
-		default:
-			goto err;
-		}
-	}
-
-	return true;
-
-err:
-	test_print_help(argv[0]);
-	return false;
-}
-
-int main(int argc, char *argv[])
-{
-	struct kvm_vm *vm;
-
-	if (!parse_args(argc, argv))
-		exit(KSFT_SKIP);
-
-	__TEST_REQUIRE(!test_args.migration_freq_ms || get_nprocs() >= 2,
-		       "At least two physical CPUs needed for vCPU migration");
-
-	vm = test_vm_create();
-	test_run(vm);
-	test_vm_cleanup(vm);
-
-	return 0;
-}