Re: [PATCH v6 24/24] KVM: riscv: selftests: Add commandline option for SBI PMU test

On 4/15/24 06:43, Andrew Jones wrote:

On Wed, Apr 10, 2024 at 05:07:52PM -0700, Atish Patra wrote:

...

SBI PMU test comprises of multiple tests and user may want to run only a subset depending on the platform. The most common case would be to run all to validate all the tests. However, some platform may not support all events or all ISA extensions.

The commandline option allows user to disable particular test if they want to.

Suggested-by: Andrew Jones ajones@ventanamicro.com Signed-off-by: Atish Patra atishp@rivosinc.com

---

.../selftests/kvm/riscv/sbi_pmu_test.c | 77 ++++++++++++++++--- 1 file changed, 68 insertions(+), 9 deletions(-)

diff --git a/tools/testing/selftests/kvm/riscv/sbi_pmu_test.c b/tools/testing/selftests/kvm/riscv/sbi_pmu_test.c index 0fd9b76ae838..57025b07a403 100644 --- a/tools/testing/selftests/kvm/riscv/sbi_pmu_test.c +++ b/tools/testing/selftests/kvm/riscv/sbi_pmu_test.c @@ -33,6 +33,16 @@ static unsigned long counter_mask_available; static bool illegal_handler_invoked; +enum sbi_pmu_test_id {

• SBI_PMU_TEST_BASIC = 0,
• SBI_PMU_TEST_EVENTS,
• SBI_PMU_TEST_SNAPSHOT,
• SBI_PMU_TEST_OVERFLOW,
• SBI_PMU_TEST_MAX,

+};

+static int disabled_test_id = SBI_PMU_TEST_MAX;

I think we should allow specifying '-d' multiple times in case a user wants to disable more than one type of test. So we should set a bit in this variable instead of assigning it. We could also flip it around. If the user uses '-e' to enable test type then only type will be run, but then we'd probably want to allow multiple '-e' too so it doesn't gain anything.

Sure. Added multiple disable option.

...

• unsigned long pmu_csr_read_num(int csr_num) { #define switchcase_csr_read(__csr_num, __val) {\

@@ -608,19 +618,68 @@ static void test_vm_events_overflow(void *guest_code) test_vm_destroy(vm); } -int main(void) +static void test_print_help(char *name) {

• test_vm_basic_test(test_pmu_basic_sanity);
• pr_info("SBI PMU basic test : PASS\n");

• pr_info("Usage: %s [-h] [-d <test name>]\n", name);
• pr_info("\t-d: Test to disable. Available tests are 'basic', 'events', 'snapshot', 'overflow'\n");
• pr_info("\t-h: print this help screen\n");

+}

• test_vm_events_test(test_pmu_events);
• pr_info("SBI PMU event verification test : PASS\n");

+static bool parse_args(int argc, char *argv[]) +{

• int opt;
• while ((opt = getopt(argc, argv, "hd:")) != -1) {

• switch (opt) {
  

• case 'd':
  

• 	if (!strncmp("basic", optarg, 5))
  

• 		disabled_test_id = SBI_PMU_TEST_BASIC;
  

• 	else if (!strncmp("events", optarg, 6))
  

• 		disabled_test_id = SBI_PMU_TEST_EVENTS;
  

• 	else if (!strncmp("snapshot", optarg, 8))
  

• 		disabled_test_id = SBI_PMU_TEST_SNAPSHOT;
  

• 	else if (!strncmp("overflow", optarg, 8))
  

• 		disabled_test_id = SBI_PMU_TEST_OVERFLOW;
  

• 	else
  

• 		goto done;
  

• 	break;
  

• break;
  

Extra 'break'

Fixed. Thanks for catching this.

...

• case 'h':
  

• default:
  

• 	goto done;
  

• }
  

• }

• test_vm_events_snapshot_test(test_pmu_events_snaphost);
• pr_info("SBI PMU event verification with snapshot test : PASS\n");

• return true;

+done:

• test_print_help(argv[0]);
• return false;

+}

• test_vm_events_overflow(test_pmu_events_overflow);
• pr_info("SBI PMU event verification with overflow test : PASS\n");

+int main(int argc, char *argv[]) +{

• if (!parse_args(argc, argv))

• exit(KSFT_SKIP);
  

• if (disabled_test_id != SBI_PMU_TEST_BASIC) {

• test_vm_basic_test(test_pmu_basic_sanity);
  

• pr_info("SBI PMU basic test : PASS\n");
  

• }
• if (disabled_test_id != SBI_PMU_TEST_EVENTS) {

• test_vm_events_test(test_pmu_events);
  

• pr_info("SBI PMU event verification test : PASS\n");
  

• }
• if (disabled_test_id != SBI_PMU_TEST_SNAPSHOT) {

• test_vm_events_snapshot_test(test_pmu_events_snaphost);
  

• pr_info("SBI PMU event verification with snapshot test : PASS\n");
  

• }
• if (disabled_test_id != SBI_PMU_TEST_OVERFLOW) {

• test_vm_events_overflow(test_pmu_events_overflow);
  

• pr_info("SBI PMU event verification with overflow test : PASS\n");
  

• }

return 0; } -- 2.34.1

Thanks, drew

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