1009 lines
26 KiB
C
1009 lines
26 KiB
C
/*-
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* Copyright (c) 2003-2007 Joseph Koshy
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* Copyright (c) 2007 The FreeBSD Foundation
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* All rights reserved.
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*
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* Portions of this software were developed by A. Joseph Koshy under
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* sponsorship from the FreeBSD Foundation and Google, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/* Support for the AMD K7 and later processors */
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/pmc.h>
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#include <sys/smp.h>
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#include <sys/systm.h>
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#include <machine/cpu.h>
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#include <machine/cpufunc.h>
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#include <machine/md_var.h>
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#include <machine/specialreg.h>
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#ifdef DEBUG
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enum pmc_class amd_pmc_class;
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#endif
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/* AMD K7 & K8 PMCs */
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struct amd_descr {
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struct pmc_descr pm_descr; /* "base class" */
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uint32_t pm_evsel; /* address of EVSEL register */
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uint32_t pm_perfctr; /* address of PERFCTR register */
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};
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static struct amd_descr amd_pmcdesc[AMD_NPMCS] =
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{
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{
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.pm_descr =
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{
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.pd_name = "TSC",
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.pd_class = PMC_CLASS_TSC,
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.pd_caps = PMC_CAP_READ,
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.pd_width = 64
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},
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.pm_evsel = MSR_TSC,
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.pm_perfctr = 0 /* unused */
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},
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{
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.pm_descr =
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{
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.pd_name = "",
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.pd_class = -1,
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.pd_caps = AMD_PMC_CAPS,
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.pd_width = 48
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},
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.pm_evsel = AMD_PMC_EVSEL_0,
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.pm_perfctr = AMD_PMC_PERFCTR_0
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},
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{
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.pm_descr =
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{
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.pd_name = "",
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.pd_class = -1,
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.pd_caps = AMD_PMC_CAPS,
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.pd_width = 48
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},
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.pm_evsel = AMD_PMC_EVSEL_1,
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.pm_perfctr = AMD_PMC_PERFCTR_1
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},
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{
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.pm_descr =
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{
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.pd_name = "",
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.pd_class = -1,
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.pd_caps = AMD_PMC_CAPS,
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.pd_width = 48
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},
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.pm_evsel = AMD_PMC_EVSEL_2,
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.pm_perfctr = AMD_PMC_PERFCTR_2
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},
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{
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.pm_descr =
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{
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.pd_name = "",
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.pd_class = -1,
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.pd_caps = AMD_PMC_CAPS,
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.pd_width = 48
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},
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.pm_evsel = AMD_PMC_EVSEL_3,
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.pm_perfctr = AMD_PMC_PERFCTR_3
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}
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};
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struct amd_event_code_map {
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enum pmc_event pe_ev; /* enum value */
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uint8_t pe_code; /* encoded event mask */
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uint8_t pe_mask; /* bits allowed in unit mask */
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};
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const struct amd_event_code_map amd_event_codes[] = {
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#if defined(__i386__) /* 32 bit Athlon (K7) only */
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{ PMC_EV_K7_DC_ACCESSES, 0x40, 0 },
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{ PMC_EV_K7_DC_MISSES, 0x41, 0 },
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{ PMC_EV_K7_DC_REFILLS_FROM_L2, 0x42, AMD_PMC_UNITMASK_MOESI },
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{ PMC_EV_K7_DC_REFILLS_FROM_SYSTEM, 0x43, AMD_PMC_UNITMASK_MOESI },
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{ PMC_EV_K7_DC_WRITEBACKS, 0x44, AMD_PMC_UNITMASK_MOESI },
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{ PMC_EV_K7_L1_DTLB_MISS_AND_L2_DTLB_HITS, 0x45, 0 },
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{ PMC_EV_K7_L1_AND_L2_DTLB_MISSES, 0x46, 0 },
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{ PMC_EV_K7_MISALIGNED_REFERENCES, 0x47, 0 },
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{ PMC_EV_K7_IC_FETCHES, 0x80, 0 },
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{ PMC_EV_K7_IC_MISSES, 0x81, 0 },
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{ PMC_EV_K7_L1_ITLB_MISSES, 0x84, 0 },
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{ PMC_EV_K7_L1_L2_ITLB_MISSES, 0x85, 0 },
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{ PMC_EV_K7_RETIRED_INSTRUCTIONS, 0xC0, 0 },
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{ PMC_EV_K7_RETIRED_OPS, 0xC1, 0 },
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{ PMC_EV_K7_RETIRED_BRANCHES, 0xC2, 0 },
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{ PMC_EV_K7_RETIRED_BRANCHES_MISPREDICTED, 0xC3, 0 },
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{ PMC_EV_K7_RETIRED_TAKEN_BRANCHES, 0xC4, 0 },
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{ PMC_EV_K7_RETIRED_TAKEN_BRANCHES_MISPREDICTED, 0xC5, 0 },
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{ PMC_EV_K7_RETIRED_FAR_CONTROL_TRANSFERS, 0xC6, 0 },
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{ PMC_EV_K7_RETIRED_RESYNC_BRANCHES, 0xC7, 0 },
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{ PMC_EV_K7_INTERRUPTS_MASKED_CYCLES, 0xCD, 0 },
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{ PMC_EV_K7_INTERRUPTS_MASKED_WHILE_PENDING_CYCLES, 0xCE, 0 },
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{ PMC_EV_K7_HARDWARE_INTERRUPTS, 0xCF, 0 },
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#endif
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{ PMC_EV_K8_FP_DISPATCHED_FPU_OPS, 0x00, 0x3F },
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{ PMC_EV_K8_FP_CYCLES_WITH_NO_FPU_OPS_RETIRED, 0x01, 0x00 },
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{ PMC_EV_K8_FP_DISPATCHED_FPU_FAST_FLAG_OPS, 0x02, 0x00 },
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{ PMC_EV_K8_LS_SEGMENT_REGISTER_LOAD, 0x20, 0x7F },
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{ PMC_EV_K8_LS_MICROARCHITECTURAL_RESYNC_BY_SELF_MODIFYING_CODE,
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0x21, 0x00 },
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{ PMC_EV_K8_LS_MICROARCHITECTURAL_RESYNC_BY_SNOOP, 0x22, 0x00 },
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{ PMC_EV_K8_LS_BUFFER2_FULL, 0x23, 0x00 },
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{ PMC_EV_K8_LS_LOCKED_OPERATION, 0x24, 0x07 },
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{ PMC_EV_K8_LS_MICROARCHITECTURAL_LATE_CANCEL, 0x25, 0x00 },
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{ PMC_EV_K8_LS_RETIRED_CFLUSH_INSTRUCTIONS, 0x26, 0x00 },
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{ PMC_EV_K8_LS_RETIRED_CPUID_INSTRUCTIONS, 0x27, 0x00 },
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{ PMC_EV_K8_DC_ACCESS, 0x40, 0x00 },
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{ PMC_EV_K8_DC_MISS, 0x41, 0x00 },
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{ PMC_EV_K8_DC_REFILL_FROM_L2, 0x42, 0x1F },
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{ PMC_EV_K8_DC_REFILL_FROM_SYSTEM, 0x43, 0x1F },
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{ PMC_EV_K8_DC_COPYBACK, 0x44, 0x1F },
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{ PMC_EV_K8_DC_L1_DTLB_MISS_AND_L2_DTLB_HIT, 0x45, 0x00 },
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{ PMC_EV_K8_DC_L1_DTLB_MISS_AND_L2_DTLB_MISS, 0x46, 0x00 },
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{ PMC_EV_K8_DC_MISALIGNED_DATA_REFERENCE, 0x47, 0x00 },
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{ PMC_EV_K8_DC_MICROARCHITECTURAL_LATE_CANCEL, 0x48, 0x00 },
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{ PMC_EV_K8_DC_MICROARCHITECTURAL_EARLY_CANCEL, 0x49, 0x00 },
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{ PMC_EV_K8_DC_ONE_BIT_ECC_ERROR, 0x4A, 0x03 },
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{ PMC_EV_K8_DC_DISPATCHED_PREFETCH_INSTRUCTIONS, 0x4B, 0x07 },
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{ PMC_EV_K8_DC_DCACHE_ACCESSES_BY_LOCKS, 0x4C, 0x03 },
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{ PMC_EV_K8_BU_CPU_CLK_UNHALTED, 0x76, 0x00 },
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{ PMC_EV_K8_BU_INTERNAL_L2_REQUEST, 0x7D, 0x1F },
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{ PMC_EV_K8_BU_FILL_REQUEST_L2_MISS, 0x7E, 0x07 },
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{ PMC_EV_K8_BU_FILL_INTO_L2, 0x7F, 0x03 },
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{ PMC_EV_K8_IC_FETCH, 0x80, 0x00 },
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{ PMC_EV_K8_IC_MISS, 0x81, 0x00 },
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{ PMC_EV_K8_IC_REFILL_FROM_L2, 0x82, 0x00 },
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{ PMC_EV_K8_IC_REFILL_FROM_SYSTEM, 0x83, 0x00 },
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{ PMC_EV_K8_IC_L1_ITLB_MISS_AND_L2_ITLB_HIT, 0x84, 0x00 },
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{ PMC_EV_K8_IC_L1_ITLB_MISS_AND_L2_ITLB_MISS, 0x85, 0x00 },
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{ PMC_EV_K8_IC_MICROARCHITECTURAL_RESYNC_BY_SNOOP, 0x86, 0x00 },
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{ PMC_EV_K8_IC_INSTRUCTION_FETCH_STALL, 0x87, 0x00 },
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{ PMC_EV_K8_IC_RETURN_STACK_HIT, 0x88, 0x00 },
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{ PMC_EV_K8_IC_RETURN_STACK_OVERFLOW, 0x89, 0x00 },
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{ PMC_EV_K8_FR_RETIRED_X86_INSTRUCTIONS, 0xC0, 0x00 },
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{ PMC_EV_K8_FR_RETIRED_UOPS, 0xC1, 0x00 },
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{ PMC_EV_K8_FR_RETIRED_BRANCHES, 0xC2, 0x00 },
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{ PMC_EV_K8_FR_RETIRED_BRANCHES_MISPREDICTED, 0xC3, 0x00 },
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{ PMC_EV_K8_FR_RETIRED_TAKEN_BRANCHES, 0xC4, 0x00 },
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{ PMC_EV_K8_FR_RETIRED_TAKEN_BRANCHES_MISPREDICTED, 0xC5, 0x00 },
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{ PMC_EV_K8_FR_RETIRED_FAR_CONTROL_TRANSFERS, 0xC6, 0x00 },
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{ PMC_EV_K8_FR_RETIRED_RESYNCS, 0xC7, 0x00 },
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{ PMC_EV_K8_FR_RETIRED_NEAR_RETURNS, 0xC8, 0x00 },
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{ PMC_EV_K8_FR_RETIRED_NEAR_RETURNS_MISPREDICTED, 0xC9, 0x00 },
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{ PMC_EV_K8_FR_RETIRED_TAKEN_BRANCHES_MISPREDICTED_BY_ADDR_MISCOMPARE,
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0xCA, 0x00 },
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{ PMC_EV_K8_FR_RETIRED_FPU_INSTRUCTIONS, 0xCB, 0x0F },
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{ PMC_EV_K8_FR_RETIRED_FASTPATH_DOUBLE_OP_INSTRUCTIONS,
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0xCC, 0x07 },
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{ PMC_EV_K8_FR_INTERRUPTS_MASKED_CYCLES, 0xCD, 0x00 },
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{ PMC_EV_K8_FR_INTERRUPTS_MASKED_WHILE_PENDING_CYCLES, 0xCE, 0x00 },
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{ PMC_EV_K8_FR_TAKEN_HARDWARE_INTERRUPTS, 0xCF, 0x00 },
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{ PMC_EV_K8_FR_DECODER_EMPTY, 0xD0, 0x00 },
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{ PMC_EV_K8_FR_DISPATCH_STALLS, 0xD1, 0x00 },
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{ PMC_EV_K8_FR_DISPATCH_STALL_FROM_BRANCH_ABORT_TO_RETIRE,
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0xD2, 0x00 },
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{ PMC_EV_K8_FR_DISPATCH_STALL_FOR_SERIALIZATION, 0xD3, 0x00 },
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{ PMC_EV_K8_FR_DISPATCH_STALL_FOR_SEGMENT_LOAD, 0xD4, 0x00 },
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{ PMC_EV_K8_FR_DISPATCH_STALL_WHEN_REORDER_BUFFER_IS_FULL,
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0xD5, 0x00 },
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{ PMC_EV_K8_FR_DISPATCH_STALL_WHEN_RESERVATION_STATIONS_ARE_FULL,
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0xD6, 0x00 },
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{ PMC_EV_K8_FR_DISPATCH_STALL_WHEN_FPU_IS_FULL, 0xD7, 0x00 },
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{ PMC_EV_K8_FR_DISPATCH_STALL_WHEN_LS_IS_FULL, 0xD8, 0x00 },
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{ PMC_EV_K8_FR_DISPATCH_STALL_WHEN_WAITING_FOR_ALL_TO_BE_QUIET,
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0xD9, 0x00 },
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{ PMC_EV_K8_FR_DISPATCH_STALL_WHEN_FAR_XFER_OR_RESYNC_BRANCH_PENDING,
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0xDA, 0x00 },
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{ PMC_EV_K8_FR_FPU_EXCEPTIONS, 0xDB, 0x0F },
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{ PMC_EV_K8_FR_NUMBER_OF_BREAKPOINTS_FOR_DR0, 0xDC, 0x00 },
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{ PMC_EV_K8_FR_NUMBER_OF_BREAKPOINTS_FOR_DR1, 0xDD, 0x00 },
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{ PMC_EV_K8_FR_NUMBER_OF_BREAKPOINTS_FOR_DR2, 0xDE, 0x00 },
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{ PMC_EV_K8_FR_NUMBER_OF_BREAKPOINTS_FOR_DR3, 0xDF, 0x00 },
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{ PMC_EV_K8_NB_MEMORY_CONTROLLER_PAGE_ACCESS_EVENT, 0xE0, 0x7 },
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{ PMC_EV_K8_NB_MEMORY_CONTROLLER_PAGE_TABLE_OVERFLOW, 0xE1, 0x00 },
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{ PMC_EV_K8_NB_MEMORY_CONTROLLER_DRAM_COMMAND_SLOTS_MISSED,
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0xE2, 0x00 },
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{ PMC_EV_K8_NB_MEMORY_CONTROLLER_TURNAROUND, 0xE3, 0x07 },
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{ PMC_EV_K8_NB_MEMORY_CONTROLLER_BYPASS_SATURATION, 0xE4, 0x0F },
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{ PMC_EV_K8_NB_SIZED_COMMANDS, 0xEB, 0x7F },
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{ PMC_EV_K8_NB_PROBE_RESULT, 0xEC, 0x0F },
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{ PMC_EV_K8_NB_HT_BUS0_BANDWIDTH, 0xF6, 0x0F },
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{ PMC_EV_K8_NB_HT_BUS1_BANDWIDTH, 0xF7, 0x0F },
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{ PMC_EV_K8_NB_HT_BUS2_BANDWIDTH, 0xF8, 0x0F }
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};
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const int amd_event_codes_size =
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sizeof(amd_event_codes) / sizeof(amd_event_codes[0]);
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/*
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* read a pmc register
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*/
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static int
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amd_read_pmc(int cpu, int ri, pmc_value_t *v)
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{
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enum pmc_mode mode;
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const struct amd_descr *pd;
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struct pmc *pm;
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const struct pmc_hw *phw;
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pmc_value_t tmp;
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KASSERT(cpu >= 0 && cpu < mp_ncpus,
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("[amd,%d] illegal CPU value %d", __LINE__, cpu));
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KASSERT(ri >= 0 && ri < AMD_NPMCS,
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("[amd,%d] illegal row-index %d", __LINE__, ri));
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phw = pmc_pcpu[cpu]->pc_hwpmcs[ri];
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pd = &amd_pmcdesc[ri];
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pm = phw->phw_pmc;
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KASSERT(pm != NULL,
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("[amd,%d] No owner for HWPMC [cpu%d,pmc%d]", __LINE__,
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cpu, ri));
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mode = PMC_TO_MODE(pm);
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PMCDBG(MDP,REA,1,"amd-read id=%d class=%d", ri, pd->pm_descr.pd_class);
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/* Reading the TSC is a special case */
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if (pd->pm_descr.pd_class == PMC_CLASS_TSC) {
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KASSERT(PMC_IS_COUNTING_MODE(mode),
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("[amd,%d] TSC counter in non-counting mode", __LINE__));
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*v = rdtsc();
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PMCDBG(MDP,REA,2,"amd-read id=%d -> %jd", ri, *v);
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return 0;
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}
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#ifdef DEBUG
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KASSERT(pd->pm_descr.pd_class == amd_pmc_class,
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("[amd,%d] unknown PMC class (%d)", __LINE__,
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pd->pm_descr.pd_class));
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#endif
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tmp = rdmsr(pd->pm_perfctr); /* RDMSR serializes */
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if (PMC_IS_SAMPLING_MODE(mode))
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*v = AMD_PERFCTR_VALUE_TO_RELOAD_COUNT(tmp);
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else
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*v = tmp;
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PMCDBG(MDP,REA,2,"amd-read id=%d -> %jd", ri, *v);
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return 0;
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}
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/*
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* Write a PMC MSR.
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*/
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static int
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amd_write_pmc(int cpu, int ri, pmc_value_t v)
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{
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const struct amd_descr *pd;
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struct pmc *pm;
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const struct pmc_hw *phw;
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enum pmc_mode mode;
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KASSERT(cpu >= 0 && cpu < mp_ncpus,
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("[amd,%d] illegal CPU value %d", __LINE__, cpu));
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KASSERT(ri >= 0 && ri < AMD_NPMCS,
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("[amd,%d] illegal row-index %d", __LINE__, ri));
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phw = pmc_pcpu[cpu]->pc_hwpmcs[ri];
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pd = &amd_pmcdesc[ri];
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pm = phw->phw_pmc;
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KASSERT(pm != NULL,
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("[amd,%d] PMC not owned (cpu%d,pmc%d)", __LINE__,
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cpu, ri));
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mode = PMC_TO_MODE(pm);
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if (pd->pm_descr.pd_class == PMC_CLASS_TSC)
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return 0;
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#ifdef DEBUG
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KASSERT(pd->pm_descr.pd_class == amd_pmc_class,
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("[amd,%d] unknown PMC class (%d)", __LINE__,
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pd->pm_descr.pd_class));
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#endif
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/* use 2's complement of the count for sampling mode PMCs */
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if (PMC_IS_SAMPLING_MODE(mode))
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v = AMD_RELOAD_COUNT_TO_PERFCTR_VALUE(v);
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PMCDBG(MDP,WRI,1,"amd-write cpu=%d ri=%d v=%jx", cpu, ri, v);
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/* write the PMC value */
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wrmsr(pd->pm_perfctr, v);
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return 0;
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}
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/*
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* configure hardware pmc according to the configuration recorded in
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* pmc 'pm'.
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*/
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static int
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amd_config_pmc(int cpu, int ri, struct pmc *pm)
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{
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struct pmc_hw *phw;
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PMCDBG(MDP,CFG,1, "cpu=%d ri=%d pm=%p", cpu, ri, pm);
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KASSERT(cpu >= 0 && cpu < mp_ncpus,
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("[amd,%d] illegal CPU value %d", __LINE__, cpu));
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KASSERT(ri >= 0 && ri < AMD_NPMCS,
|
|
("[amd,%d] illegal row-index %d", __LINE__, ri));
|
|
|
|
phw = pmc_pcpu[cpu]->pc_hwpmcs[ri];
|
|
|
|
KASSERT(pm == NULL || phw->phw_pmc == NULL,
|
|
("[amd,%d] pm=%p phw->pm=%p hwpmc not unconfigured",
|
|
__LINE__, pm, phw->phw_pmc));
|
|
|
|
phw->phw_pmc = pm;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Retrieve a configured PMC pointer from hardware state.
|
|
*/
|
|
|
|
static int
|
|
amd_get_config(int cpu, int ri, struct pmc **ppm)
|
|
{
|
|
*ppm = pmc_pcpu[cpu]->pc_hwpmcs[ri]->phw_pmc;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Machine dependent actions taken during the context switch in of a
|
|
* thread.
|
|
*/
|
|
|
|
static int
|
|
amd_switch_in(struct pmc_cpu *pc, struct pmc_process *pp)
|
|
{
|
|
(void) pc;
|
|
|
|
PMCDBG(MDP,SWI,1, "pc=%p pp=%p enable-msr=%d", pc, pp,
|
|
(pp->pp_flags & PMC_PP_ENABLE_MSR_ACCESS) != 0);
|
|
|
|
/* enable the RDPMC instruction if needed */
|
|
if (pp->pp_flags & PMC_PP_ENABLE_MSR_ACCESS)
|
|
load_cr4(rcr4() | CR4_PCE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Machine dependent actions taken during the context switch out of a
|
|
* thread.
|
|
*/
|
|
|
|
static int
|
|
amd_switch_out(struct pmc_cpu *pc, struct pmc_process *pp)
|
|
{
|
|
(void) pc;
|
|
(void) pp; /* can be NULL */
|
|
|
|
PMCDBG(MDP,SWO,1, "pc=%p pp=%p enable-msr=%d", pc, pp, pp ?
|
|
(pp->pp_flags & PMC_PP_ENABLE_MSR_ACCESS) == 1 : 0);
|
|
|
|
/* always turn off the RDPMC instruction */
|
|
load_cr4(rcr4() & ~CR4_PCE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check if a given allocation is feasible.
|
|
*/
|
|
|
|
static int
|
|
amd_allocate_pmc(int cpu, int ri, struct pmc *pm,
|
|
const struct pmc_op_pmcallocate *a)
|
|
{
|
|
int i;
|
|
uint32_t allowed_unitmask, caps, config, unitmask;
|
|
enum pmc_event pe;
|
|
const struct pmc_descr *pd;
|
|
|
|
(void) cpu;
|
|
|
|
KASSERT(cpu >= 0 && cpu < mp_ncpus,
|
|
("[amd,%d] illegal CPU value %d", __LINE__, cpu));
|
|
KASSERT(ri >= 0 && ri < AMD_NPMCS,
|
|
("[amd,%d] illegal row index %d", __LINE__, ri));
|
|
|
|
pd = &amd_pmcdesc[ri].pm_descr;
|
|
|
|
/* check class match */
|
|
if (pd->pd_class != a->pm_class)
|
|
return EINVAL;
|
|
|
|
caps = pm->pm_caps;
|
|
|
|
PMCDBG(MDP,ALL,1,"amd-allocate ri=%d caps=0x%x", ri, caps);
|
|
|
|
if ((pd->pd_caps & caps) != caps)
|
|
return EPERM;
|
|
if (pd->pd_class == PMC_CLASS_TSC) {
|
|
/* TSC's are always allocated in system-wide counting mode */
|
|
if (a->pm_ev != PMC_EV_TSC_TSC ||
|
|
a->pm_mode != PMC_MODE_SC)
|
|
return EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
KASSERT(pd->pd_class == amd_pmc_class,
|
|
("[amd,%d] Unknown PMC class (%d)", __LINE__, pd->pd_class));
|
|
#endif
|
|
|
|
pe = a->pm_ev;
|
|
|
|
/* map ev to the correct event mask code */
|
|
config = allowed_unitmask = 0;
|
|
for (i = 0; i < amd_event_codes_size; i++)
|
|
if (amd_event_codes[i].pe_ev == pe) {
|
|
config =
|
|
AMD_PMC_TO_EVENTMASK(amd_event_codes[i].pe_code);
|
|
allowed_unitmask =
|
|
AMD_PMC_TO_UNITMASK(amd_event_codes[i].pe_mask);
|
|
break;
|
|
}
|
|
if (i == amd_event_codes_size)
|
|
return EINVAL;
|
|
|
|
unitmask = a->pm_md.pm_amd.pm_amd_config & AMD_PMC_UNITMASK;
|
|
if (unitmask & ~allowed_unitmask) /* disallow reserved bits */
|
|
return EINVAL;
|
|
|
|
if (unitmask && (caps & PMC_CAP_QUALIFIER))
|
|
config |= unitmask;
|
|
|
|
if (caps & PMC_CAP_THRESHOLD)
|
|
config |= a->pm_md.pm_amd.pm_amd_config & AMD_PMC_COUNTERMASK;
|
|
|
|
/* set at least one of the 'usr' or 'os' caps */
|
|
if (caps & PMC_CAP_USER)
|
|
config |= AMD_PMC_USR;
|
|
if (caps & PMC_CAP_SYSTEM)
|
|
config |= AMD_PMC_OS;
|
|
if ((caps & (PMC_CAP_USER|PMC_CAP_SYSTEM)) == 0)
|
|
config |= (AMD_PMC_USR|AMD_PMC_OS);
|
|
|
|
if (caps & PMC_CAP_EDGE)
|
|
config |= AMD_PMC_EDGE;
|
|
if (caps & PMC_CAP_INVERT)
|
|
config |= AMD_PMC_INVERT;
|
|
if (caps & PMC_CAP_INTERRUPT)
|
|
config |= AMD_PMC_INT;
|
|
|
|
pm->pm_md.pm_amd.pm_amd_evsel = config; /* save config value */
|
|
|
|
PMCDBG(MDP,ALL,2,"amd-allocate ri=%d -> config=0x%x", ri, config);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Release machine dependent state associated with a PMC. This is a
|
|
* no-op on this architecture.
|
|
*
|
|
*/
|
|
|
|
/* ARGSUSED0 */
|
|
static int
|
|
amd_release_pmc(int cpu, int ri, struct pmc *pmc)
|
|
{
|
|
#ifdef DEBUG
|
|
const struct amd_descr *pd;
|
|
#endif
|
|
struct pmc_hw *phw;
|
|
|
|
(void) pmc;
|
|
|
|
KASSERT(cpu >= 0 && cpu < mp_ncpus,
|
|
("[amd,%d] illegal CPU value %d", __LINE__, cpu));
|
|
KASSERT(ri >= 0 && ri < AMD_NPMCS,
|
|
("[amd,%d] illegal row-index %d", __LINE__, ri));
|
|
|
|
phw = pmc_pcpu[cpu]->pc_hwpmcs[ri];
|
|
|
|
KASSERT(phw->phw_pmc == NULL,
|
|
("[amd,%d] PHW pmc %p non-NULL", __LINE__, phw->phw_pmc));
|
|
|
|
#ifdef DEBUG
|
|
pd = &amd_pmcdesc[ri];
|
|
if (pd->pm_descr.pd_class == amd_pmc_class)
|
|
KASSERT(AMD_PMC_IS_STOPPED(pd->pm_evsel),
|
|
("[amd,%d] PMC %d released while active", __LINE__, ri));
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* start a PMC.
|
|
*/
|
|
|
|
static int
|
|
amd_start_pmc(int cpu, int ri)
|
|
{
|
|
uint32_t config;
|
|
struct pmc *pm;
|
|
struct pmc_hw *phw;
|
|
const struct amd_descr *pd;
|
|
|
|
KASSERT(cpu >= 0 && cpu < mp_ncpus,
|
|
("[amd,%d] illegal CPU value %d", __LINE__, cpu));
|
|
KASSERT(ri >= 0 && ri < AMD_NPMCS,
|
|
("[amd,%d] illegal row-index %d", __LINE__, ri));
|
|
|
|
phw = pmc_pcpu[cpu]->pc_hwpmcs[ri];
|
|
pm = phw->phw_pmc;
|
|
pd = &amd_pmcdesc[ri];
|
|
|
|
KASSERT(pm != NULL,
|
|
("[amd,%d] starting cpu%d,pmc%d with null pmc record", __LINE__,
|
|
cpu, ri));
|
|
|
|
PMCDBG(MDP,STA,1,"amd-start cpu=%d ri=%d", cpu, ri);
|
|
|
|
if (pd->pm_descr.pd_class == PMC_CLASS_TSC)
|
|
return 0; /* TSCs are always running */
|
|
|
|
#ifdef DEBUG
|
|
KASSERT(pd->pm_descr.pd_class == amd_pmc_class,
|
|
("[amd,%d] unknown PMC class (%d)", __LINE__,
|
|
pd->pm_descr.pd_class));
|
|
#endif
|
|
|
|
KASSERT(AMD_PMC_IS_STOPPED(pd->pm_evsel),
|
|
("[amd,%d] pmc%d,cpu%d: Starting active PMC \"%s\"", __LINE__,
|
|
ri, cpu, pd->pm_descr.pd_name));
|
|
|
|
/* turn on the PMC ENABLE bit */
|
|
config = pm->pm_md.pm_amd.pm_amd_evsel | AMD_PMC_ENABLE;
|
|
|
|
PMCDBG(MDP,STA,2,"amd-start config=0x%x", config);
|
|
|
|
wrmsr(pd->pm_evsel, config);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Stop a PMC.
|
|
*/
|
|
|
|
static int
|
|
amd_stop_pmc(int cpu, int ri)
|
|
{
|
|
struct pmc *pm;
|
|
struct pmc_hw *phw;
|
|
const struct amd_descr *pd;
|
|
uint64_t config;
|
|
|
|
KASSERT(cpu >= 0 && cpu < mp_ncpus,
|
|
("[amd,%d] illegal CPU value %d", __LINE__, cpu));
|
|
KASSERT(ri >= 0 && ri < AMD_NPMCS,
|
|
("[amd,%d] illegal row-index %d", __LINE__, ri));
|
|
|
|
phw = pmc_pcpu[cpu]->pc_hwpmcs[ri];
|
|
pm = phw->phw_pmc;
|
|
pd = &amd_pmcdesc[ri];
|
|
|
|
KASSERT(pm != NULL,
|
|
("[amd,%d] cpu%d,pmc%d no PMC to stop", __LINE__,
|
|
cpu, ri));
|
|
|
|
/* can't stop a TSC */
|
|
if (pd->pm_descr.pd_class == PMC_CLASS_TSC)
|
|
return 0;
|
|
|
|
#ifdef DEBUG
|
|
KASSERT(pd->pm_descr.pd_class == amd_pmc_class,
|
|
("[amd,%d] unknown PMC class (%d)", __LINE__,
|
|
pd->pm_descr.pd_class));
|
|
#endif
|
|
|
|
KASSERT(!AMD_PMC_IS_STOPPED(pd->pm_evsel),
|
|
("[amd,%d] PMC%d, CPU%d \"%s\" already stopped",
|
|
__LINE__, ri, cpu, pd->pm_descr.pd_name));
|
|
|
|
PMCDBG(MDP,STO,1,"amd-stop ri=%d", ri);
|
|
|
|
/* turn off the PMC ENABLE bit */
|
|
config = pm->pm_md.pm_amd.pm_amd_evsel & ~AMD_PMC_ENABLE;
|
|
wrmsr(pd->pm_evsel, config);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Interrupt handler. This function needs to return '1' if the
|
|
* interrupt was this CPU's PMCs or '0' otherwise. It is not allowed
|
|
* to sleep or do anything a 'fast' interrupt handler is not allowed
|
|
* to do.
|
|
*/
|
|
|
|
static int
|
|
amd_intr(int cpu, struct trapframe *tf)
|
|
{
|
|
int i, error, retval, ri;
|
|
uint32_t config, evsel, perfctr;
|
|
struct pmc *pm;
|
|
struct pmc_cpu *pc;
|
|
struct pmc_hw *phw;
|
|
pmc_value_t v;
|
|
|
|
KASSERT(cpu >= 0 && cpu < mp_ncpus,
|
|
("[amd,%d] out of range CPU %d", __LINE__, cpu));
|
|
|
|
PMCDBG(MDP,INT,1, "cpu=%d tf=%p um=%d", cpu, (void *) tf,
|
|
TRAPF_USERMODE(tf));
|
|
|
|
retval = 0;
|
|
|
|
pc = pmc_pcpu[cpu];
|
|
|
|
/*
|
|
* look for all PMCs that have interrupted:
|
|
* - skip over the TSC [PMC#0]
|
|
* - look for a running, sampling PMC which has overflowed
|
|
* and which has a valid 'struct pmc' association
|
|
*
|
|
* If found, we call a helper to process the interrupt.
|
|
*
|
|
* If multiple PMCs interrupt at the same time, the AMD64
|
|
* processor appears to deliver as many NMIs as there are
|
|
* outstanding PMC interrupts. So we process only one NMI
|
|
* interrupt at a time.
|
|
*/
|
|
|
|
for (i = 0; retval == 0 && i < AMD_NPMCS-1; i++) {
|
|
|
|
ri = i + 1; /* row index; TSC is at ri == 0 */
|
|
|
|
if (!AMD_PMC_HAS_OVERFLOWED(i))
|
|
continue;
|
|
|
|
phw = pc->pc_hwpmcs[ri];
|
|
|
|
KASSERT(phw != NULL, ("[amd,%d] null PHW pointer", __LINE__));
|
|
|
|
if ((pm = phw->phw_pmc) == NULL ||
|
|
pm->pm_state != PMC_STATE_RUNNING ||
|
|
!PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm))) {
|
|
continue;
|
|
}
|
|
|
|
retval = 1; /* Found an interrupting PMC. */
|
|
|
|
/* Stop the PMC, reload count. */
|
|
evsel = AMD_PMC_EVSEL_0 + i;
|
|
perfctr = AMD_PMC_PERFCTR_0 + i;
|
|
v = pm->pm_sc.pm_reloadcount;
|
|
config = rdmsr(evsel);
|
|
|
|
KASSERT((config & ~AMD_PMC_ENABLE) ==
|
|
(pm->pm_md.pm_amd.pm_amd_evsel & ~AMD_PMC_ENABLE),
|
|
("[amd,%d] config mismatch reg=0x%x pm=0x%x", __LINE__,
|
|
config, pm->pm_md.pm_amd.pm_amd_evsel));
|
|
|
|
wrmsr(evsel, config & ~AMD_PMC_ENABLE);
|
|
wrmsr(perfctr, AMD_RELOAD_COUNT_TO_PERFCTR_VALUE(v));
|
|
|
|
/* Restart the counter if logging succeeded. */
|
|
error = pmc_process_interrupt(cpu, pm, tf, TRAPF_USERMODE(tf));
|
|
if (error == 0)
|
|
wrmsr(evsel, config | AMD_PMC_ENABLE);
|
|
}
|
|
|
|
atomic_add_int(retval ? &pmc_stats.pm_intr_processed :
|
|
&pmc_stats.pm_intr_ignored, 1);
|
|
|
|
return (retval);
|
|
}
|
|
|
|
/*
|
|
* describe a PMC
|
|
*/
|
|
static int
|
|
amd_describe(int cpu, int ri, struct pmc_info *pi, struct pmc **ppmc)
|
|
{
|
|
int error;
|
|
size_t copied;
|
|
const struct amd_descr *pd;
|
|
struct pmc_hw *phw;
|
|
|
|
KASSERT(cpu >= 0 && cpu < mp_ncpus,
|
|
("[amd,%d] illegal CPU %d", __LINE__, cpu));
|
|
KASSERT(ri >= 0 && ri < AMD_NPMCS,
|
|
("[amd,%d] row-index %d out of range", __LINE__, ri));
|
|
|
|
phw = pmc_pcpu[cpu]->pc_hwpmcs[ri];
|
|
pd = &amd_pmcdesc[ri];
|
|
|
|
if ((error = copystr(pd->pm_descr.pd_name, pi->pm_name,
|
|
PMC_NAME_MAX, &copied)) != 0)
|
|
return error;
|
|
|
|
pi->pm_class = pd->pm_descr.pd_class;
|
|
|
|
if (phw->phw_state & PMC_PHW_FLAG_IS_ENABLED) {
|
|
pi->pm_enabled = TRUE;
|
|
*ppmc = phw->phw_pmc;
|
|
} else {
|
|
pi->pm_enabled = FALSE;
|
|
*ppmc = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* i386 specific entry points
|
|
*/
|
|
|
|
/*
|
|
* return the MSR address of the given PMC.
|
|
*/
|
|
|
|
static int
|
|
amd_get_msr(int ri, uint32_t *msr)
|
|
{
|
|
KASSERT(ri >= 0 && ri < AMD_NPMCS,
|
|
("[amd,%d] ri %d out of range", __LINE__, ri));
|
|
|
|
*msr = amd_pmcdesc[ri].pm_perfctr - AMD_PMC_PERFCTR_0;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* processor dependent initialization.
|
|
*/
|
|
|
|
/*
|
|
* Per-processor data structure
|
|
*
|
|
* [common stuff]
|
|
* [5 struct pmc_hw pointers]
|
|
* [5 struct pmc_hw structures]
|
|
*/
|
|
|
|
struct amd_cpu {
|
|
struct pmc_cpu pc_common;
|
|
struct pmc_hw *pc_hwpmcs[AMD_NPMCS];
|
|
struct pmc_hw pc_amdpmcs[AMD_NPMCS];
|
|
};
|
|
|
|
|
|
static int
|
|
amd_init(int cpu)
|
|
{
|
|
int n;
|
|
struct amd_cpu *pcs;
|
|
struct pmc_hw *phw;
|
|
|
|
KASSERT(cpu >= 0 && cpu < mp_ncpus,
|
|
("[amd,%d] insane cpu number %d", __LINE__, cpu));
|
|
|
|
PMCDBG(MDP,INI,1,"amd-init cpu=%d", cpu);
|
|
|
|
MALLOC(pcs, struct amd_cpu *, sizeof(struct amd_cpu), M_PMC,
|
|
M_WAITOK|M_ZERO);
|
|
|
|
phw = &pcs->pc_amdpmcs[0];
|
|
|
|
/*
|
|
* Initialize the per-cpu mutex and set the content of the
|
|
* hardware descriptors to a known state.
|
|
*/
|
|
|
|
for (n = 0; n < AMD_NPMCS; n++, phw++) {
|
|
phw->phw_state = PMC_PHW_FLAG_IS_ENABLED |
|
|
PMC_PHW_CPU_TO_STATE(cpu) | PMC_PHW_INDEX_TO_STATE(n);
|
|
phw->phw_pmc = NULL;
|
|
pcs->pc_hwpmcs[n] = phw;
|
|
}
|
|
|
|
/* Mark the TSC as shareable */
|
|
pcs->pc_hwpmcs[0]->phw_state |= PMC_PHW_FLAG_IS_SHAREABLE;
|
|
|
|
pmc_pcpu[cpu] = (struct pmc_cpu *) pcs;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* processor dependent cleanup prior to the KLD
|
|
* being unloaded
|
|
*/
|
|
|
|
static int
|
|
amd_cleanup(int cpu)
|
|
{
|
|
int i;
|
|
uint32_t evsel;
|
|
struct pmc_cpu *pcs;
|
|
|
|
KASSERT(cpu >= 0 && cpu < mp_ncpus,
|
|
("[amd,%d] insane cpu number (%d)", __LINE__, cpu));
|
|
|
|
PMCDBG(MDP,INI,1,"amd-cleanup cpu=%d", cpu);
|
|
|
|
/*
|
|
* First, turn off all PMCs on this CPU.
|
|
*/
|
|
|
|
for (i = 0; i < 4; i++) { /* XXX this loop is now not needed */
|
|
evsel = rdmsr(AMD_PMC_EVSEL_0 + i);
|
|
evsel &= ~AMD_PMC_ENABLE;
|
|
wrmsr(AMD_PMC_EVSEL_0 + i, evsel);
|
|
}
|
|
|
|
/*
|
|
* Next, free up allocated space.
|
|
*/
|
|
|
|
if ((pcs = pmc_pcpu[cpu]) == NULL)
|
|
return 0;
|
|
|
|
#ifdef DEBUG
|
|
/* check the TSC */
|
|
KASSERT(pcs->pc_hwpmcs[0]->phw_pmc == NULL,
|
|
("[amd,%d] CPU%d,PMC0 still in use", __LINE__, cpu));
|
|
for (i = 1; i < AMD_NPMCS; i++) {
|
|
KASSERT(pcs->pc_hwpmcs[i]->phw_pmc == NULL,
|
|
("[amd,%d] CPU%d/PMC%d in use", __LINE__, cpu, i));
|
|
KASSERT(AMD_PMC_IS_STOPPED(AMD_PMC_EVSEL_0 + (i-1)),
|
|
("[amd,%d] CPU%d/PMC%d not stopped", __LINE__, cpu, i));
|
|
}
|
|
#endif
|
|
|
|
pmc_pcpu[cpu] = NULL;
|
|
FREE(pcs, M_PMC);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Initialize ourselves.
|
|
*/
|
|
|
|
struct pmc_mdep *
|
|
pmc_amd_initialize(void)
|
|
{
|
|
enum pmc_cputype cputype;
|
|
enum pmc_class class;
|
|
struct pmc_mdep *pmc_mdep;
|
|
char *name;
|
|
int i;
|
|
|
|
/*
|
|
* The presence of hardware performance counters on the AMD
|
|
* Athlon, Duron or later processors, is _not_ indicated by
|
|
* any of the processor feature flags set by the 'CPUID'
|
|
* instruction, so we only check the 'instruction family'
|
|
* field returned by CPUID for instruction family >= 6.
|
|
*/
|
|
|
|
class = cputype = -1;
|
|
name = NULL;
|
|
switch (cpu_id & 0xF00) {
|
|
case 0x600: /* Athlon(tm) processor */
|
|
cputype = PMC_CPU_AMD_K7;
|
|
class = PMC_CLASS_K7;
|
|
name = "K7";
|
|
break;
|
|
case 0xF00: /* Athlon64/Opteron processor */
|
|
cputype = PMC_CPU_AMD_K8;
|
|
class = PMC_CLASS_K8;
|
|
name = "K8";
|
|
break;
|
|
}
|
|
|
|
if ((int) cputype == -1) {
|
|
(void) printf("pmc: Unknown AMD CPU.\n");
|
|
return NULL;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
amd_pmc_class = class;
|
|
#endif
|
|
|
|
MALLOC(pmc_mdep, struct pmc_mdep *, sizeof(struct pmc_mdep),
|
|
M_PMC, M_WAITOK|M_ZERO);
|
|
|
|
pmc_mdep->pmd_cputype = cputype;
|
|
pmc_mdep->pmd_npmc = AMD_NPMCS;
|
|
|
|
/* this processor has two classes of usable PMCs */
|
|
pmc_mdep->pmd_nclass = 2;
|
|
|
|
/* TSC */
|
|
pmc_mdep->pmd_classes[0].pm_class = PMC_CLASS_TSC;
|
|
pmc_mdep->pmd_classes[0].pm_caps = PMC_CAP_READ;
|
|
pmc_mdep->pmd_classes[0].pm_width = 64;
|
|
|
|
/* AMD K7/K8 PMCs */
|
|
pmc_mdep->pmd_classes[1].pm_class = class;
|
|
pmc_mdep->pmd_classes[1].pm_caps = AMD_PMC_CAPS;
|
|
pmc_mdep->pmd_classes[1].pm_width = 48;
|
|
|
|
pmc_mdep->pmd_nclasspmcs[0] = 1;
|
|
pmc_mdep->pmd_nclasspmcs[1] = (AMD_NPMCS-1);
|
|
|
|
/* fill in the correct pmc name and class */
|
|
for (i = 1; i < AMD_NPMCS; i++) {
|
|
(void) snprintf(amd_pmcdesc[i].pm_descr.pd_name,
|
|
sizeof(amd_pmcdesc[i].pm_descr.pd_name), "%s-%d",
|
|
name, i-1);
|
|
amd_pmcdesc[i].pm_descr.pd_class = class;
|
|
}
|
|
|
|
pmc_mdep->pmd_init = amd_init;
|
|
pmc_mdep->pmd_cleanup = amd_cleanup;
|
|
pmc_mdep->pmd_switch_in = amd_switch_in;
|
|
pmc_mdep->pmd_switch_out = amd_switch_out;
|
|
pmc_mdep->pmd_read_pmc = amd_read_pmc;
|
|
pmc_mdep->pmd_write_pmc = amd_write_pmc;
|
|
pmc_mdep->pmd_config_pmc = amd_config_pmc;
|
|
pmc_mdep->pmd_get_config = amd_get_config;
|
|
pmc_mdep->pmd_allocate_pmc = amd_allocate_pmc;
|
|
pmc_mdep->pmd_release_pmc = amd_release_pmc;
|
|
pmc_mdep->pmd_start_pmc = amd_start_pmc;
|
|
pmc_mdep->pmd_stop_pmc = amd_stop_pmc;
|
|
pmc_mdep->pmd_intr = amd_intr;
|
|
pmc_mdep->pmd_describe = amd_describe;
|
|
pmc_mdep->pmd_get_msr = amd_get_msr; /* i386 */
|
|
|
|
PMCDBG(MDP,INI,0,"%s","amd-initialize");
|
|
|
|
return pmc_mdep;
|
|
}
|