diff options
Diffstat (limited to 'tools/testing/selftests/powerpc/pmu')
4 files changed, 64 insertions, 5 deletions
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/Makefile b/tools/testing/selftests/powerpc/pmu/ebb/Makefile index c5ecb4634094..010160690227 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/Makefile +++ b/tools/testing/selftests/powerpc/pmu/ebb/Makefile @@ -24,7 +24,7 @@ TEST_GEN_PROGS := reg_access_test event_attributes_test cycles_test \ fork_cleanup_test ebb_on_child_test \ ebb_on_willing_child_test back_to_back_ebbs_test \ lost_exception_test no_handler_test \ - cycles_with_mmcr2_test + cycles_with_mmcr2_test regs_access_pmccext_test top_srcdir = ../../../../../.. include ../../../lib.mk diff --git a/tools/testing/selftests/powerpc/pmu/ebb/ebb.h b/tools/testing/selftests/powerpc/pmu/ebb/ebb.h index b5bc2b616075..2c803b5b48d6 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/ebb.h +++ b/tools/testing/selftests/powerpc/pmu/ebb/ebb.h @@ -55,8 +55,6 @@ void ebb_global_disable(void); bool ebb_is_supported(void); void ebb_freeze_pmcs(void); void ebb_unfreeze_pmcs(void); -void event_ebb_init(struct event *e); -void event_leader_ebb_init(struct event *e); int count_pmc(int pmc, uint32_t sample_period); void dump_ebb_state(void); void dump_summary_ebb_state(void); diff --git a/tools/testing/selftests/powerpc/pmu/ebb/no_handler_test.c b/tools/testing/selftests/powerpc/pmu/ebb/no_handler_test.c index fc5bf4870d8e..01e827c31169 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/no_handler_test.c +++ b/tools/testing/selftests/powerpc/pmu/ebb/no_handler_test.c @@ -50,8 +50,6 @@ static int no_handler_test(void) event_close(&event); - dump_ebb_state(); - /* The real test is that we never took an EBB at 0x0 */ return 0; diff --git a/tools/testing/selftests/powerpc/pmu/ebb/regs_access_pmccext_test.c b/tools/testing/selftests/powerpc/pmu/ebb/regs_access_pmccext_test.c new file mode 100644 index 000000000000..1eda8e9932e8 --- /dev/null +++ b/tools/testing/selftests/powerpc/pmu/ebb/regs_access_pmccext_test.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2021, Athira Rajeev, IBM Corp. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <setjmp.h> +#include <signal.h> + +#include "ebb.h" + + +/* + * Test that closing the EBB event clears MMCR0_PMCC and + * sets MMCR0_PMCCEXT preventing further read access to the + * group B PMU registers. + */ + +static int regs_access_pmccext(void) +{ + struct event event; + + SKIP_IF(!ebb_is_supported()); + + event_init_named(&event, 0x1001e, "cycles"); + event_leader_ebb_init(&event); + + FAIL_IF(event_open(&event)); + + ebb_enable_pmc_counting(1); + setup_ebb_handler(standard_ebb_callee); + ebb_global_enable(); + FAIL_IF(ebb_event_enable(&event)); + + mtspr(SPRN_PMC1, pmc_sample_period(sample_period)); + + while (ebb_state.stats.ebb_count < 1) + FAIL_IF(core_busy_loop()); + + ebb_global_disable(); + event_close(&event); + + FAIL_IF(ebb_state.stats.ebb_count == 0); + + /* + * For ISA v3.1, verify the test takes a SIGILL when reading + * PMU regs after the event is closed. With the control bit + * in MMCR0 (PMCCEXT) restricting access to group B PMU regs, + * sigill is expected. + */ + if (have_hwcap2(PPC_FEATURE2_ARCH_3_1)) + FAIL_IF(catch_sigill(dump_ebb_state)); + else + dump_ebb_state(); + + return 0; +} + +int main(void) +{ + return test_harness(regs_access_pmccext, "regs_access_pmccext"); +} |