| Message ID | 636e8c3bf8b35be089182569621eaff331242d98.1702371136.git.haibo1.xu@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | RISCV: Add kvm Sstc timer selftests | expand |
Hi Marc, Hi Oliver, On Tue, Dec 12, 2023 at 2:49 PM Haibo Xu <haibo1.xu@intel.com> wrote: > > Split the arch-neutral test code out of aarch64/arch_timer.c > and put them into a common arch_timer.c. This is a preparation > to share timer test codes in riscv. > > Suggested-by: Andrew Jones <ajones@ventanamicro.com> > Signed-off-by: Haibo Xu <haibo1.xu@intel.com> > Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Can you please review this patch ? We want to take this entire series through KVM RISC-V tree. Regards, Anup > --- > tools/testing/selftests/kvm/Makefile | 3 +- > .../selftests/kvm/aarch64/arch_timer.c | 275 +----------------- > tools/testing/selftests/kvm/arch_timer.c | 249 ++++++++++++++++ > .../testing/selftests/kvm/include/test_util.h | 2 + > .../selftests/kvm/include/timer_test.h | 43 +++ > 5 files changed, 302 insertions(+), 270 deletions(-) > create mode 100644 tools/testing/selftests/kvm/arch_timer.c > create mode 100644 tools/testing/selftests/kvm/include/timer_test.h > > diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile > index 2200f06b740b..4838ea899bbb 100644 > --- a/tools/testing/selftests/kvm/Makefile > +++ b/tools/testing/selftests/kvm/Makefile > @@ -151,7 +151,6 @@ TEST_GEN_PROGS_x86_64 += system_counter_offset_test > TEST_GEN_PROGS_EXTENDED_x86_64 += x86_64/nx_huge_pages_test > > TEST_GEN_PROGS_aarch64 += aarch64/aarch32_id_regs > -TEST_GEN_PROGS_aarch64 += aarch64/arch_timer > TEST_GEN_PROGS_aarch64 += aarch64/debug-exceptions > TEST_GEN_PROGS_aarch64 += aarch64/hypercalls > TEST_GEN_PROGS_aarch64 += aarch64/page_fault_test > @@ -163,6 +162,7 @@ TEST_GEN_PROGS_aarch64 += aarch64/vgic_init > TEST_GEN_PROGS_aarch64 += aarch64/vgic_irq > TEST_GEN_PROGS_aarch64 += aarch64/vpmu_counter_access > TEST_GEN_PROGS_aarch64 += access_tracking_perf_test > +TEST_GEN_PROGS_aarch64 += arch_timer > TEST_GEN_PROGS_aarch64 += demand_paging_test > TEST_GEN_PROGS_aarch64 += dirty_log_test > TEST_GEN_PROGS_aarch64 += dirty_log_perf_test > @@ -201,6 +201,7 @@ TEST_GEN_PROGS_riscv += kvm_page_table_test > TEST_GEN_PROGS_riscv += set_memory_region_test > TEST_GEN_PROGS_riscv += kvm_binary_stats_test > > +SPLIT_TESTS += arch_timer > SPLIT_TESTS += get-reg-list > > TEST_PROGS += $(TEST_PROGS_$(ARCH_DIR)) > diff --git a/tools/testing/selftests/kvm/aarch64/arch_timer.c b/tools/testing/selftests/kvm/aarch64/arch_timer.c > index 274b8465b42a..6fb47ba07e5b 100644 > --- a/tools/testing/selftests/kvm/aarch64/arch_timer.c > +++ b/tools/testing/selftests/kvm/aarch64/arch_timer.c > @@ -1,64 +1,19 @@ > // 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. > + * CVAL and TVAL registers. > * > * 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 "delay.h" > #include "gic.h" > +#include "processor.h" > +#include "timer_test.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 > > @@ -70,22 +25,8 @@ enum guest_stage { > 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) > { > @@ -222,137 +163,6 @@ static void guest_code(void) > 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 */ > @@ -369,7 +179,7 @@ static void test_init_timer_irq(struct kvm_vm *vm) > > static int gic_fd; > > -static struct kvm_vm *test_vm_create(void) > +struct kvm_vm *test_vm_create(void) > { > struct kvm_vm *vm; > unsigned int i; > @@ -400,81 +210,8 @@ static struct kvm_vm *test_vm_create(void) > return vm; > } > > -static void test_vm_cleanup(struct kvm_vm *vm) > +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; > -} > diff --git a/tools/testing/selftests/kvm/arch_timer.c b/tools/testing/selftests/kvm/arch_timer.c > new file mode 100644 > index 000000000000..6e442dbcfc8b > --- /dev/null > +++ b/tools/testing/selftests/kvm/arch_timer.c > @@ -0,0 +1,249 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * arch_timer.c - Tests the arch timer IRQ functionality > + * > + * The guest's main thread configures the timer interrupt 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 plus > + * an error margin of 100us. > + * > + * 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/sizes.h> > +#include <linux/bitmap.h> > +#include <sys/sysinfo.h> > + > +#include "timer_test.h" > + > +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 }, > +}; > + > +struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; > +struct test_vcpu_shared_data vcpu_shared_data[KVM_MAX_VCPUS]; > + > +static pthread_t pt_vcpu_run[KVM_MAX_VCPUS]; > +static unsigned long *vcpu_done_map; > +static pthread_mutex_t vcpu_done_map_lock; > + > +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_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; > +} > diff --git a/tools/testing/selftests/kvm/include/test_util.h b/tools/testing/selftests/kvm/include/test_util.h > index 8e5f413a593d..36387e7ee8b2 100644 > --- a/tools/testing/selftests/kvm/include/test_util.h > +++ b/tools/testing/selftests/kvm/include/test_util.h > @@ -20,6 +20,8 @@ > #include <sys/mman.h> > #include "kselftest.h" > > +#define msecs_to_usecs(msec) ((msec) * 1000LL) > + > static inline int _no_printf(const char *format, ...) { return 0; } > > #ifdef DEBUG > diff --git a/tools/testing/selftests/kvm/include/timer_test.h b/tools/testing/selftests/kvm/include/timer_test.h > new file mode 100644 > index 000000000000..2234c513b510 > --- /dev/null > +++ b/tools/testing/selftests/kvm/include/timer_test.h > @@ -0,0 +1,43 @@ > +/* SPDX-License-Identifier: GPL-2.0-only */ > +/* > + * timer test specific header > + * > + * Copyright (C) 2018, Google LLC > + */ > + > +#ifndef SELFTEST_KVM_TIMER_TEST_H > +#define SELFTEST_KVM_TIMER_TEST_H > + > +#include "kvm_util.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 > + > +/* Timer test cmdline parameters */ > +struct test_args { > + int nr_vcpus; > + int nr_iter; > + int timer_period_ms; > + int migration_freq_ms; > + /* TODO: Change arm specific type to a common one */ > + struct kvm_arm_counter_offset offset; > +}; > + > +/* Shared variables between host and guest */ > +struct test_vcpu_shared_data { > + int nr_iter; > + int guest_stage; > + uint64_t xcnt; > +}; > + > +extern struct test_args test_args; > +extern struct kvm_vcpu *vcpus[]; > +extern struct test_vcpu_shared_data vcpu_shared_data[]; > + > +struct kvm_vm *test_vm_create(void); > +void test_vm_cleanup(struct kvm_vm *vm); > + > +#endif /* SELFTEST_KVM_TIMER_TEST_H */ > -- > 2.34.1 >
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index 2200f06b740b..4838ea899bbb 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -151,7 +151,6 @@ TEST_GEN_PROGS_x86_64 += system_counter_offset_test TEST_GEN_PROGS_EXTENDED_x86_64 += x86_64/nx_huge_pages_test TEST_GEN_PROGS_aarch64 += aarch64/aarch32_id_regs -TEST_GEN_PROGS_aarch64 += aarch64/arch_timer TEST_GEN_PROGS_aarch64 += aarch64/debug-exceptions TEST_GEN_PROGS_aarch64 += aarch64/hypercalls TEST_GEN_PROGS_aarch64 += aarch64/page_fault_test @@ -163,6 +162,7 @@ TEST_GEN_PROGS_aarch64 += aarch64/vgic_init TEST_GEN_PROGS_aarch64 += aarch64/vgic_irq TEST_GEN_PROGS_aarch64 += aarch64/vpmu_counter_access TEST_GEN_PROGS_aarch64 += access_tracking_perf_test +TEST_GEN_PROGS_aarch64 += arch_timer TEST_GEN_PROGS_aarch64 += demand_paging_test TEST_GEN_PROGS_aarch64 += dirty_log_test TEST_GEN_PROGS_aarch64 += dirty_log_perf_test @@ -201,6 +201,7 @@ TEST_GEN_PROGS_riscv += kvm_page_table_test TEST_GEN_PROGS_riscv += set_memory_region_test TEST_GEN_PROGS_riscv += kvm_binary_stats_test +SPLIT_TESTS += arch_timer SPLIT_TESTS += get-reg-list TEST_PROGS += $(TEST_PROGS_$(ARCH_DIR)) diff --git a/tools/testing/selftests/kvm/aarch64/arch_timer.c b/tools/testing/selftests/kvm/aarch64/arch_timer.c index 274b8465b42a..6fb47ba07e5b 100644 --- a/tools/testing/selftests/kvm/aarch64/arch_timer.c +++ b/tools/testing/selftests/kvm/aarch64/arch_timer.c @@ -1,64 +1,19 @@ // 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. + * CVAL and TVAL registers. * * 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 "delay.h" #include "gic.h" +#include "processor.h" +#include "timer_test.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 @@ -70,22 +25,8 @@ enum guest_stage { 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) { @@ -222,137 +163,6 @@ static void guest_code(void) 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 */ @@ -369,7 +179,7 @@ static void test_init_timer_irq(struct kvm_vm *vm) static int gic_fd; -static struct kvm_vm *test_vm_create(void) +struct kvm_vm *test_vm_create(void) { struct kvm_vm *vm; unsigned int i; @@ -400,81 +210,8 @@ static struct kvm_vm *test_vm_create(void) return vm; } -static void test_vm_cleanup(struct kvm_vm *vm) +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; -} diff --git a/tools/testing/selftests/kvm/arch_timer.c b/tools/testing/selftests/kvm/arch_timer.c new file mode 100644 index 000000000000..6e442dbcfc8b --- /dev/null +++ b/tools/testing/selftests/kvm/arch_timer.c @@ -0,0 +1,249 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * arch_timer.c - Tests the arch timer IRQ functionality + * + * The guest's main thread configures the timer interrupt 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 plus + * an error margin of 100us. + * + * 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/sizes.h> +#include <linux/bitmap.h> +#include <sys/sysinfo.h> + +#include "timer_test.h" + +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 }, +}; + +struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; +struct test_vcpu_shared_data vcpu_shared_data[KVM_MAX_VCPUS]; + +static pthread_t pt_vcpu_run[KVM_MAX_VCPUS]; +static unsigned long *vcpu_done_map; +static pthread_mutex_t vcpu_done_map_lock; + +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_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; +} diff --git a/tools/testing/selftests/kvm/include/test_util.h b/tools/testing/selftests/kvm/include/test_util.h index 8e5f413a593d..36387e7ee8b2 100644 --- a/tools/testing/selftests/kvm/include/test_util.h +++ b/tools/testing/selftests/kvm/include/test_util.h @@ -20,6 +20,8 @@ #include <sys/mman.h> #include "kselftest.h" +#define msecs_to_usecs(msec) ((msec) * 1000LL) + static inline int _no_printf(const char *format, ...) { return 0; } #ifdef DEBUG diff --git a/tools/testing/selftests/kvm/include/timer_test.h b/tools/testing/selftests/kvm/include/timer_test.h new file mode 100644 index 000000000000..2234c513b510 --- /dev/null +++ b/tools/testing/selftests/kvm/include/timer_test.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * timer test specific header + * + * Copyright (C) 2018, Google LLC + */ + +#ifndef SELFTEST_KVM_TIMER_TEST_H +#define SELFTEST_KVM_TIMER_TEST_H + +#include "kvm_util.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 + +/* Timer test cmdline parameters */ +struct test_args { + int nr_vcpus; + int nr_iter; + int timer_period_ms; + int migration_freq_ms; + /* TODO: Change arm specific type to a common one */ + struct kvm_arm_counter_offset offset; +}; + +/* Shared variables between host and guest */ +struct test_vcpu_shared_data { + int nr_iter; + int guest_stage; + uint64_t xcnt; +}; + +extern struct test_args test_args; +extern struct kvm_vcpu *vcpus[]; +extern struct test_vcpu_shared_data vcpu_shared_data[]; + +struct kvm_vm *test_vm_create(void); +void test_vm_cleanup(struct kvm_vm *vm); + +#endif /* SELFTEST_KVM_TIMER_TEST_H */