diff options
author | Marc Zyngier <maz@kernel.org> | 2023-03-30 20:48:00 +0300 |
---|---|---|
committer | Marc Zyngier <maz@kernel.org> | 2023-03-30 21:01:11 +0300 |
commit | 2fe9e0fc21602339b82cdba58ef81a5a97d90ca2 (patch) | |
tree | c7392108d2dd1154a1a7f8e63514483a73150eaa | |
parent | 056c15669a01677ba3e44456580bf4a351f71ff7 (diff) | |
download | linux-2fe9e0fc21602339b82cdba58ef81a5a97d90ca2.tar.xz |
KVM: arm64: selftests: Augment existing timer test to handle variable offset
Allow a user to specify the global offset on the command-line.
Reviewed-by: Colton Lewis <coltonlewis@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230330174800.2677007-21-maz@kernel.org
-rw-r--r-- | tools/testing/selftests/kvm/aarch64/arch_timer.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/tools/testing/selftests/kvm/aarch64/arch_timer.c b/tools/testing/selftests/kvm/aarch64/arch_timer.c index 176ab41dd01b..8ef370924a02 100644 --- a/tools/testing/selftests/kvm/aarch64/arch_timer.c +++ b/tools/testing/selftests/kvm/aarch64/arch_timer.c @@ -47,6 +47,7 @@ struct test_args { int nr_iter; int timer_period_ms; int migration_freq_ms; + struct kvm_arm_counter_offset offset; }; static struct test_args test_args = { @@ -54,6 +55,7 @@ static struct test_args test_args = { .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) @@ -382,6 +384,13 @@ static struct kvm_vm *test_vm_create(void) 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]); @@ -413,6 +422,7 @@ static void test_print_help(char *name) 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"); } @@ -420,7 +430,7 @@ static bool parse_args(int argc, char *argv[]) { int opt; - while ((opt = getopt(argc, argv, "hn:i:p:m:")) != -1) { + 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); @@ -439,6 +449,10 @@ static bool parse_args(int argc, char *argv[]) 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; |