diff options
Diffstat (limited to 'tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c')
| -rw-r--r-- | tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c index 4779b107f43b..a86d7d125955 100644 --- a/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c +++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2022, Athira Rajeev, IBM Corp. + * Copyright 2022, Madhavan Srinivasan, IBM Corp. */ #include <unistd.h> @@ -16,6 +17,137 @@ #define PAGE_SIZE sysconf(_SC_PAGESIZE) +/* Storage for platform version */ +int pvr; +u64 platform_extended_mask; + +/* Mask and Shift for Event code fields */ +int ev_mask_pmcxsel, ev_shift_pmcxsel; //pmcxsel field +int ev_mask_marked, ev_shift_marked; //marked filed +int ev_mask_comb, ev_shift_comb; //combine field +int ev_mask_unit, ev_shift_unit; //unit field +int ev_mask_pmc, ev_shift_pmc; //pmc field +int ev_mask_cache, ev_shift_cache; //Cache sel field +int ev_mask_sample, ev_shift_sample; //Random sampling field +int ev_mask_thd_sel, ev_shift_thd_sel; //thresh_sel field +int ev_mask_thd_start, ev_shift_thd_start; //thresh_start field +int ev_mask_thd_stop, ev_shift_thd_stop; //thresh_stop field +int ev_mask_thd_cmp, ev_shift_thd_cmp; //thresh cmp field +int ev_mask_sm, ev_shift_sm; //SDAR mode field +int ev_mask_rsq, ev_shift_rsq; //radix scope qual field +int ev_mask_l2l3, ev_shift_l2l3; //l2l3 sel field +int ev_mask_mmcr3_src, ev_shift_mmcr3_src; //mmcr3 field + +static void init_ev_encodes(void) +{ + ev_mask_pmcxsel = 0xff; + ev_shift_pmcxsel = 0; + ev_mask_marked = 1; + ev_shift_marked = 8; + ev_mask_unit = 0xf; + ev_shift_unit = 12; + ev_mask_pmc = 0xf; + ev_shift_pmc = 16; + ev_mask_sample = 0x1f; + ev_shift_sample = 24; + ev_mask_thd_sel = 0x7; + ev_shift_thd_sel = 29; + ev_mask_thd_start = 0xf; + ev_shift_thd_start = 36; + ev_mask_thd_stop = 0xf; + ev_shift_thd_stop = 32; + + switch (pvr) { + case POWER10: + ev_mask_rsq = 1; + ev_shift_rsq = 9; + ev_mask_comb = 3; + ev_shift_comb = 10; + ev_mask_cache = 3; + ev_shift_cache = 20; + ev_mask_sm = 0x3; + ev_shift_sm = 22; + ev_mask_l2l3 = 0x1f; + ev_shift_l2l3 = 40; + ev_mask_mmcr3_src = 0x7fff; + ev_shift_mmcr3_src = 45; + break; + case POWER9: + ev_mask_comb = 3; + ev_shift_comb = 10; + ev_mask_cache = 0xf; + ev_shift_cache = 20; + ev_mask_thd_cmp = 0x3ff; + ev_shift_thd_cmp = 40; + ev_mask_sm = 0x3; + ev_shift_sm = 50; + break; + default: + FAIL_IF_EXIT(1); + } +} + +/* Return the extended regs mask value */ +static u64 perf_get_platform_reg_mask(void) +{ + if (have_hwcap2(PPC_FEATURE2_ARCH_3_1)) + return PERF_POWER10_MASK; + if (have_hwcap2(PPC_FEATURE2_ARCH_3_00)) + return PERF_POWER9_MASK; + + return -1; +} + +int check_extended_regs_support(void) +{ + int fd; + struct event event; + + event_init(&event, 0x1001e); + + event.attr.type = 4; + event.attr.sample_period = 1; + event.attr.disabled = 1; + event.attr.sample_type = PERF_SAMPLE_REGS_INTR; + event.attr.sample_regs_intr = platform_extended_mask; + + fd = event_open(&event); + if (fd != -1) + return 0; + + return -1; +} + +int check_pvr_for_sampling_tests(void) +{ + pvr = PVR_VER(mfspr(SPRN_PVR)); + + platform_extended_mask = perf_get_platform_reg_mask(); + + /* + * Check for supported platforms + * for sampling test + */ + if ((pvr != POWER10) && (pvr != POWER9)) + goto out; + + /* + * Check PMU driver registered by looking for + * PPC_FEATURE2_EBB bit in AT_HWCAP2 + */ + if (!have_hwcap2(PPC_FEATURE2_EBB)) + goto out; + + /* check if platform supports extended regs */ + if (check_extended_regs_support()) + goto out; + + init_ev_encodes(); + return 0; +out: + printf("%s: Sampling tests un-supported\n", __func__); + return -1; +} /* * Allocate mmap buffer of "mmap_pages" number of * pages. |