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powerpc64: add Power8 and Power9 PMCs
Add support to allocate Power8 and 9 PMCs. Submitted by: Leonardo Bianconi <leonardo.bianconi@eldorado.org.br> Reviewed by: mhorne Sponsored by: Instituto de Pesquisas Eldorado (eldorado.org.br) Differential Revision: https://reviews.freebsd.org/D31109
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@ -142,6 +142,13 @@ pmu_alias_get(const char *name)
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return (name);
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}
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#elif defined(__powerpc64__)
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static const char *
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pmu_alias_get(const char *name)
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{
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return (name);
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}
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#elif defined(__aarch64__)
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@ -571,6 +578,33 @@ pmc_pmu_pmcallocate(const char *event_name, struct pmc_op_pmcallocate *pm)
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return (pmc_pmu_amd_pmcallocate(event_name, pm, &ped));
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}
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#elif defined(__powerpc64__)
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int
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pmc_pmu_pmcallocate(const char *event_name, struct pmc_op_pmcallocate *pm)
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{
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const struct pmu_event *pe;
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struct pmu_event_desc ped;
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int idx = -1;
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bzero(&pm->pm_md, sizeof(pm->pm_md));
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pm->pm_caps |= (PMC_CAP_READ | PMC_CAP_WRITE);
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event_name = pmu_alias_get(event_name);
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if ((pe = pmu_event_get(NULL, event_name, &idx)) == NULL)
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return (ENOENT);
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if (pe->event == NULL)
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return (ENOENT);
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if (pmu_parse_event(&ped, pe->event))
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return (ENOENT);
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assert(ped.ped_event >= 0);
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pm->pm_ev = idx;
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pm->pm_md.pm_event = ped.ped_event;
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pm->pm_class = PMC_CLASS_POWER8;
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return (0);
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}
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#elif defined(__aarch64__)
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int
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@ -43,6 +43,12 @@ __FBSDID("$FreeBSD$");
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#define POWER8_MAX_PMCS 6
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#define PM_EVENT_CODE(pe) (pe & 0xffff)
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#define PM_EVENT_COUNTER(pe) ((pe >> 16) & 0xffff)
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#define PM_CYC 0x1e
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#define PM_INST_CMPL 0x02
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static struct pmc_ppc_event power8_event_codes[] = {
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{PMC_EV_POWER8_INSTR_COMPLETED,
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.pe_flags = PMC_FLAG_PMC5,
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@ -275,6 +281,54 @@ power8_resume_pmc(bool ie)
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mtspr(SPR_MMCR0, mmcr0);
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}
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static int
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power8_allocate_pmc(int cpu, int ri, struct pmc *pm,
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const struct pmc_op_pmcallocate *a)
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{
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uint32_t caps, config, counter, pe;
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KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
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("[powerpc,%d] illegal CPU value %d", __LINE__, cpu));
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KASSERT(ri >= 0 && ri < ppc_max_pmcs,
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("[powerpc,%d] illegal row index %d", __LINE__, ri));
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pe = a->pm_md.pm_event;
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counter = PM_EVENT_COUNTER(pe);
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config = PM_EVENT_CODE(pe);
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/*
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* PMC5 and PMC6 are not programmable and always count instructions
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* completed and cycles, respectively.
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*
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* When counter is 0 any of the 4 programmable PMCs may be used for
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* the specified event, otherwise it must match ri + 1.
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*/
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if (counter == 0 && config == PM_INST_CMPL)
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counter = 5;
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else if (counter == 0 && config == PM_CYC)
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counter = 6;
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else if (counter > 4)
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return (EINVAL);
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if (counter != 0 && counter != ri + 1)
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return (EINVAL);
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caps = a->pm_caps;
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if (caps & PMC_CAP_SYSTEM)
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config |= POWERPC_PMC_KERNEL_ENABLE;
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if (caps & PMC_CAP_USER)
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config |= POWERPC_PMC_USER_ENABLE;
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if ((caps & (PMC_CAP_USER | PMC_CAP_SYSTEM)) == 0)
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config |= POWERPC_PMC_ENABLE;
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pm->pm_md.pm_powerpc.pm_powerpc_evsel = config;
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PMCDBG3(MDP,ALL,1,"powerpc-allocate cpu=%d ri=%d -> config=0x%x",
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cpu, ri, config);
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return (0);
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}
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int
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pmc_power8_initialize(struct pmc_mdep *pmc_mdep)
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{
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@ -291,7 +345,7 @@ pmc_power8_initialize(struct pmc_mdep *pmc_mdep)
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pcd->pcd_pcpu_init = power8_pcpu_init;
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pcd->pcd_pcpu_fini = power8_pcpu_fini;
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pcd->pcd_allocate_pmc = powerpc_allocate_pmc;
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pcd->pcd_allocate_pmc = power8_allocate_pmc;
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pcd->pcd_release_pmc = powerpc_release_pmc;
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pcd->pcd_start_pmc = powerpc_start_pmc;
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pcd->pcd_stop_pmc = powerpc_stop_pmc;
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@ -304,10 +358,7 @@ pmc_power8_initialize(struct pmc_mdep *pmc_mdep)
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pmc_mdep->pmd_npmc += POWER8_MAX_PMCS;
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pmc_mdep->pmd_intr = powerpc_pmc_intr;
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ppc_event_codes = power8_event_codes;
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ppc_event_codes_size = power8_event_codes_size;
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ppc_event_first = PMC_EV_POWER8_FIRST;
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ppc_event_last = PMC_EV_POWER8_LAST;
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ppc_max_pmcs = POWER8_MAX_PMCS;
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powerpc_set_pmc = power8_set_pmc;
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@ -603,6 +603,9 @@ pmc_md_initialize()
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pmc_mdep = NULL;
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}
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/* Set the value for kern.hwpmc.cpuid */
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snprintf(pmc_cpuid, sizeof(pmc_cpuid), "%08lx", mfpvr());
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return (pmc_mdep);
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}
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@ -10,6 +10,7 @@
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#define PMC_MDEP_CLASS_INDEX_POWERPC 1
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union pmc_md_op_pmcallocate {
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uint32_t pm_event;
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uint64_t __pad[4];
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};
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