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freebsd-dev/sys/dev/hwpmc/hwpmc_ppro.c
Fabien Thomas f5f9340b98 Add software PMC support. 
New kernel events can be added at various location for sampling or counting.
This will for example allow easy system profiling whatever the processor is
with known tools like pmcstat(8).

Simultaneous usage of software PMC and hardware PMC is possible, for example
looking at the lock acquire failure, page fault while sampling on
instructions.

Sponsored by: NETASQ
MFC after:	1 month
2012-03-28 20:58:30 +00:00

867 lines
24 KiB
C
Raw Blame History

/*-
* Copyright (c) 2003-2005,2008 Joseph Koshy
* Copyright (c) 2007 The FreeBSD Foundation
* All rights reserved.
*
* Portions of this software were developed by A. Joseph Koshy under
* sponsorship from the FreeBSD Foundation and Google, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/pmc.h>
#include <sys/pmckern.h>
#include <sys/smp.h>
#include <sys/systm.h>
#include <machine/intr_machdep.h>
#include <machine/apicvar.h>
#include <machine/cpu.h>
#include <machine/cpufunc.h>
#include <machine/cputypes.h>
#include <machine/md_var.h>
#include <machine/pmc_mdep.h>
#include <machine/specialreg.h>
/*
* PENTIUM PRO SUPPORT
*
* Quirks:
*
* - Both PMCs are enabled by a single bit P6_EVSEL_EN in performance
* counter '0'. This bit needs to be '1' if any of the two
* performance counters are in use. Perf counters can also be
* switched off by writing zeros to their EVSEL register.
*
* - While the width of these counters is 40 bits, we do not appear to
* have a way of writing 40 bits to the counter MSRs. A WRMSR
* instruction will sign extend bit 31 of the value being written to
* the perf counter -- a value of 0x80000000 written to an perf
* counter register will be sign extended to 0xFF80000000.
*
* This quirk primarily affects thread-mode PMCs in counting mode, as
* these PMCs read and write PMC registers at every context switch.
*/
struct p6pmc_descr {
struct pmc_descr pm_descr; /* common information */
uint32_t pm_pmc_msr;
uint32_t pm_evsel_msr;
};
static struct p6pmc_descr p6_pmcdesc[P6_NPMCS] = {
#define P6_PMC_CAPS (PMC_CAP_INTERRUPT | PMC_CAP_USER | PMC_CAP_SYSTEM | \
PMC_CAP_EDGE | PMC_CAP_THRESHOLD | PMC_CAP_READ | PMC_CAP_WRITE | \
PMC_CAP_INVERT | PMC_CAP_QUALIFIER)
/* PMC 0 */
{
.pm_descr =
{
.pd_name ="P6-0",
.pd_class = PMC_CLASS_P6,
.pd_caps = P6_PMC_CAPS,
.pd_width = 40
},
.pm_pmc_msr = P6_MSR_PERFCTR0,
.pm_evsel_msr = P6_MSR_EVSEL0
},
/* PMC 1 */
{
.pm_descr =
{
.pd_name ="P6-1",
.pd_class = PMC_CLASS_P6,
.pd_caps = P6_PMC_CAPS,
.pd_width = 40
},
.pm_pmc_msr = P6_MSR_PERFCTR1,
.pm_evsel_msr = P6_MSR_EVSEL1
}
};
static enum pmc_cputype p6_cputype;
/*
* P6 Event descriptor
*
* The 'pm_flags' field has the following structure:
* - The upper 4 bits are used to track which counter an event is valid on.
* - The lower bits form a bitmask of flags indicating support for the event
* on a given CPU.
*/
struct p6_event_descr {
const enum pmc_event pm_event;
uint32_t pm_evsel;
uint32_t pm_flags;
uint32_t pm_unitmask;
};
#define P6F_CTR(C) (1 << (28 + (C)))
#define P6F_CTR0 P6F_CTR(0)
#define P6F_CTR1 P6F_CTR(1)
#define P6F(CPU) (1 << ((CPU) - PMC_CPU_INTEL_P6))
#define _P6F(C) P6F(PMC_CPU_INTEL_##C)
#define P6F_P6 _P6F(P6)
#define P6F_CL _P6F(CL)
#define P6F_PII _P6F(PII)
#define P6F_PIII _P6F(PIII)
#define P6F_PM _P6F(PM)
#define P6F_ALL_CPUS (P6F_P6 | P6F_PII | P6F_CL | P6F_PIII | P6F_PM)
#define P6F_ALL_CTRS (P6F_CTR0 | P6F_CTR1)
#define P6F_ALL (P6F_ALL_CPUS | P6F_ALL_CTRS)
#define P6_EVENT_VALID_FOR_CPU(P,CPU) ((P)->pm_flags & P6F(CPU))
#define P6_EVENT_VALID_FOR_CTR(P,CTR) ((P)->pm_flags & P6F_CTR(CTR))
static const struct p6_event_descr p6_events[] = {
#define P6_EVDESCR(NAME, EVSEL, FLAGS, UMASK) \
{ \
.pm_event = PMC_EV_P6_##NAME, \
.pm_evsel = (EVSEL), \
.pm_flags = (FLAGS), \
.pm_unitmask = (UMASK) \
}
P6_EVDESCR(DATA_MEM_REFS, 0x43, P6F_ALL, 0x00),
P6_EVDESCR(DCU_LINES_IN, 0x45, P6F_ALL, 0x00),
P6_EVDESCR(DCU_M_LINES_IN, 0x46, P6F_ALL, 0x00),
P6_EVDESCR(DCU_M_LINES_OUT, 0x47, P6F_ALL, 0x00),
P6_EVDESCR(DCU_MISS_OUTSTANDING, 0x47, P6F_ALL, 0x00),
P6_EVDESCR(IFU_FETCH, 0x80, P6F_ALL, 0x00),
P6_EVDESCR(IFU_FETCH_MISS, 0x81, P6F_ALL, 0x00),
P6_EVDESCR(ITLB_MISS, 0x85, P6F_ALL, 0x00),
P6_EVDESCR(IFU_MEM_STALL, 0x86, P6F_ALL, 0x00),
P6_EVDESCR(ILD_STALL, 0x87, P6F_ALL, 0x00),
P6_EVDESCR(L2_IFETCH, 0x28, P6F_ALL, 0x0F),
P6_EVDESCR(L2_LD, 0x29, P6F_ALL, 0x0F),
P6_EVDESCR(L2_ST, 0x2A, P6F_ALL, 0x0F),
P6_EVDESCR(L2_LINES_IN, 0x24, P6F_ALL, 0x0F),
P6_EVDESCR(L2_LINES_OUT, 0x26, P6F_ALL, 0x0F),
P6_EVDESCR(L2_M_LINES_INM, 0x25, P6F_ALL, 0x00),
P6_EVDESCR(L2_M_LINES_OUTM, 0x27, P6F_ALL, 0x0F),
P6_EVDESCR(L2_RQSTS, 0x2E, P6F_ALL, 0x0F),
P6_EVDESCR(L2_ADS, 0x21, P6F_ALL, 0x00),
P6_EVDESCR(L2_DBUS_BUSY, 0x22, P6F_ALL, 0x00),
P6_EVDESCR(L2_DBUS_BUSY_RD, 0x23, P6F_ALL, 0x00),
P6_EVDESCR(BUS_DRDY_CLOCKS, 0x62, P6F_ALL, 0x20),
P6_EVDESCR(BUS_LOCK_CLOCKS, 0x63, P6F_ALL, 0x20),
P6_EVDESCR(BUS_REQ_OUTSTANDING, 0x60, P6F_ALL, 0x00),
P6_EVDESCR(BUS_TRAN_BRD, 0x65, P6F_ALL, 0x20),
P6_EVDESCR(BUS_TRAN_RFO, 0x66, P6F_ALL, 0x20),
P6_EVDESCR(BUS_TRANS_WB, 0x67, P6F_ALL, 0x20),
P6_EVDESCR(BUS_TRAN_IFETCH, 0x68, P6F_ALL, 0x20),
P6_EVDESCR(BUS_TRAN_INVAL, 0x69, P6F_ALL, 0x20),
P6_EVDESCR(BUS_TRAN_PWR, 0x6A, P6F_ALL, 0x20),
P6_EVDESCR(BUS_TRANS_P, 0x6B, P6F_ALL, 0x20),
P6_EVDESCR(BUS_TRANS_IO, 0x6C, P6F_ALL, 0x20),
P6_EVDESCR(BUS_TRAN_DEF, 0x6D, P6F_ALL, 0x20),
P6_EVDESCR(BUS_TRAN_BURST, 0x6E, P6F_ALL, 0x20),
P6_EVDESCR(BUS_TRAN_ANY, 0x70, P6F_ALL, 0x20),
P6_EVDESCR(BUS_TRAN_MEM, 0x6F, P6F_ALL, 0x20),
P6_EVDESCR(BUS_DATA_RCV, 0x64, P6F_ALL, 0x00),
P6_EVDESCR(BUS_BNR_DRV, 0x61, P6F_ALL, 0x00),
P6_EVDESCR(BUS_HIT_DRV, 0x7A, P6F_ALL, 0x00),
P6_EVDESCR(BUS_HITM_DRV, 0x7B, P6F_ALL, 0x00),
P6_EVDESCR(BUS_SNOOP_STALL, 0x7E, P6F_ALL, 0x00),
P6_EVDESCR(FLOPS, 0xC1, P6F_ALL_CPUS | P6F_CTR0, 0x00),
P6_EVDESCR(FP_COMPS_OPS_EXE, 0x10, P6F_ALL_CPUS | P6F_CTR0, 0x00),
P6_EVDESCR(FP_ASSIST, 0x11, P6F_ALL_CPUS | P6F_CTR1, 0x00),
P6_EVDESCR(MUL, 0x12, P6F_ALL_CPUS | P6F_CTR1, 0x00),
P6_EVDESCR(DIV, 0x13, P6F_ALL_CPUS | P6F_CTR1, 0x00),
P6_EVDESCR(CYCLES_DIV_BUSY, 0x14, P6F_ALL_CPUS | P6F_CTR0, 0x00),
P6_EVDESCR(LD_BLOCKS, 0x03, P6F_ALL, 0x00),
P6_EVDESCR(SB_DRAINS, 0x04, P6F_ALL, 0x00),
P6_EVDESCR(MISALIGN_MEM_REF, 0x05, P6F_ALL, 0x00),
P6_EVDESCR(EMON_KNI_PREF_DISPATCHED, 0x07, P6F_PIII | P6F_ALL_CTRS, 0x03),
P6_EVDESCR(EMON_KNI_PREF_MISS, 0x4B, P6F_PIII | P6F_ALL_CTRS, 0x03),
P6_EVDESCR(INST_RETIRED, 0xC0, P6F_ALL, 0x00),
P6_EVDESCR(UOPS_RETIRED, 0xC2, P6F_ALL, 0x00),
P6_EVDESCR(INST_DECODED, 0xD0, P6F_ALL, 0x00),
P6_EVDESCR(EMON_KNI_INST_RETIRED, 0xD8, P6F_PIII | P6F_ALL_CTRS, 0x01),
P6_EVDESCR(EMON_KNI_COMP_INST_RET, 0xD9, P6F_PIII | P6F_ALL_CTRS, 0x01),
P6_EVDESCR(HW_INT_RX, 0xC8, P6F_ALL, 0x00),
P6_EVDESCR(CYCLES_INT_MASKED, 0xC6, P6F_ALL, 0x00),
P6_EVDESCR(CYCLES_INT_PENDING_AND_MASKED, 0xC7, P6F_ALL, 0x00),
P6_EVDESCR(BR_INST_RETIRED, 0xC4, P6F_ALL, 0x00),
P6_EVDESCR(BR_MISS_PRED_RETIRED, 0xC5, P6F_ALL, 0x00),
P6_EVDESCR(BR_TAKEN_RETIRED, 0xC9, P6F_ALL, 0x00),
P6_EVDESCR(BR_MISS_PRED_TAKEN_RET, 0xCA, P6F_ALL, 0x00),
P6_EVDESCR(BR_INST_DECODED, 0xE0, P6F_ALL, 0x00),
P6_EVDESCR(BTB_MISSES, 0xE2, P6F_ALL, 0x00),
P6_EVDESCR(BR_BOGUS, 0xE4, P6F_ALL, 0x00),
P6_EVDESCR(BACLEARS, 0xE6, P6F_ALL, 0x00),
P6_EVDESCR(RESOURCE_STALLS, 0xA2, P6F_ALL, 0x00),
P6_EVDESCR(PARTIAL_RAT_STALLS, 0xD2, P6F_ALL, 0x00),
P6_EVDESCR(SEGMENT_REG_LOADS, 0x06, P6F_ALL, 0x00),
P6_EVDESCR(CPU_CLK_UNHALTED, 0x79, P6F_ALL, 0x00),
P6_EVDESCR(MMX_INSTR_EXEC, 0xB0,
P6F_ALL_CTRS | P6F_CL | P6F_PII, 0x00),
P6_EVDESCR(MMX_SAT_INSTR_EXEC, 0xB1,
P6F_ALL_CTRS | P6F_PII | P6F_PIII, 0x00),
P6_EVDESCR(MMX_UOPS_EXEC, 0xB2,
P6F_ALL_CTRS | P6F_PII | P6F_PIII, 0x0F),
P6_EVDESCR(MMX_INSTR_TYPE_EXEC, 0xB3,
P6F_ALL_CTRS | P6F_PII | P6F_PIII, 0x3F),
P6_EVDESCR(FP_MMX_TRANS, 0xCC,
P6F_ALL_CTRS | P6F_PII | P6F_PIII, 0x01),
P6_EVDESCR(MMX_ASSIST, 0xCD,
P6F_ALL_CTRS | P6F_PII | P6F_PIII, 0x00),
P6_EVDESCR(MMX_INSTR_RET, 0xCE, P6F_ALL_CTRS | P6F_PII, 0x00),
P6_EVDESCR(SEG_RENAME_STALLS, 0xD4,
P6F_ALL_CTRS | P6F_PII | P6F_PIII, 0x0F),
P6_EVDESCR(SEG_REG_RENAMES, 0xD5,
P6F_ALL_CTRS | P6F_PII | P6F_PIII, 0x0F),
P6_EVDESCR(RET_SEG_RENAMES, 0xD6,
P6F_ALL_CTRS | P6F_PII | P6F_PIII, 0x00),
P6_EVDESCR(EMON_EST_TRANS, 0x58, P6F_ALL_CTRS | P6F_PM, 0x02),
P6_EVDESCR(EMON_THERMAL_TRIP, 0x59, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(BR_INST_EXEC, 0x88, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(BR_MISSP_EXEC, 0x89, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(BR_BAC_MISSP_EXEC, 0x8A, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(BR_CND_EXEC, 0x8B, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(BR_CND_MISSP_EXEC, 0x8C, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(BR_IND_EXEC, 0x8D, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(BR_IND_MISSP_EXEC, 0x8E, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(BR_RET_EXEC, 0x8F, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(BR_RET_MISSP_EXEC, 0x90, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(BR_RET_BAC_MISSP_EXEC, 0x91, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(BR_CALL_EXEC, 0x92, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(BR_CALL_MISSP_EXEC, 0x93, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(BR_IND_CALL_EXEC, 0x94, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(EMON_SIMD_INSTR_RETIRED, 0xCE, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(EMON_SYNCH_UOPS, 0xD3, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(EMON_ESP_UOPS, 0xD7, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(EMON_FUSED_UOPS_RET, 0xDA, P6F_ALL_CTRS | P6F_PM, 0x03),
P6_EVDESCR(EMON_UNFUSION, 0xDB, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(EMON_PREF_RQSTS_UP, 0xF0, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(EMON_PREF_RQSTS_DN, 0xD8, P6F_ALL_CTRS | P6F_PM, 0x00),
P6_EVDESCR(EMON_SSE_SSE2_INST_RETIRED, 0xD8, P6F_ALL_CTRS | P6F_PM, 0x03),
P6_EVDESCR(EMON_SSE_SSE2_COMP_INST_RETIRED, 0xD9, P6F_ALL_CTRS | P6F_PM, 0x03)
#undef P6_EVDESCR
};
#define P6_NEVENTS (PMC_EV_P6_LAST - PMC_EV_P6_FIRST + 1)
static const struct p6_event_descr *
p6_find_event(enum pmc_event ev)
{
int n;
for (n = 0; n < P6_NEVENTS; n++)
if (p6_events[n].pm_event == ev)
break;
if (n == P6_NEVENTS)
return NULL;
return &p6_events[n];
}
/*
* Per-CPU data structure for P6 class CPUs
*
* [common stuff]
* [flags for maintaining PMC start/stop state]
* [3 struct pmc_hw pointers]
* [3 struct pmc_hw structures]
*/
struct p6_cpu {
struct pmc_hw pc_p6pmcs[P6_NPMCS];
uint32_t pc_state;
};
static struct p6_cpu **p6_pcpu;
/*
* If CTR1 is active, we need to keep the 'EN' bit if CTR0 set,
* with the rest of CTR0 being zero'ed out.
*/
#define P6_SYNC_CTR_STATE(PC) do { \
uint32_t _config, _enable; \
_enable = 0; \
if ((PC)->pc_state & 0x02) \
_enable |= P6_EVSEL_EN; \
if ((PC)->pc_state & 0x01) \
_config = rdmsr(P6_MSR_EVSEL0) | \
P6_EVSEL_EN; \
else \
_config = 0; \
wrmsr(P6_MSR_EVSEL0, _config | _enable); \
} while (0)
#define P6_MARK_STARTED(PC,RI) do { \
(PC)->pc_state |= (1 << ((RI)-1)); \
} while (0)
#define P6_MARK_STOPPED(PC,RI) do { \
(PC)->pc_state &= ~(1<< ((RI)-1)); \
} while (0)
static int
p6_pcpu_init(struct pmc_mdep *md, int cpu)
{
int first_ri, n;
struct p6_cpu *p6c;
struct pmc_cpu *pc;
struct pmc_hw *phw;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[p6,%d] bad cpu %d", __LINE__, cpu));
PMCDBG(MDP,INI,0,"p6-init cpu=%d", cpu);
p6c = malloc(sizeof (struct p6_cpu), M_PMC, M_WAITOK|M_ZERO);
pc = pmc_pcpu[cpu];
KASSERT(pc != NULL, ("[p6,%d] cpu %d null per-cpu", __LINE__, cpu));
phw = p6c->pc_p6pmcs;
p6_pcpu[cpu] = p6c;
first_ri = md->pmd_classdep[PMC_MDEP_CLASS_INDEX_P6].pcd_ri;
for (n = 0; n < P6_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;
pc->pc_hwpmcs[n + first_ri] = phw;
}
return (0);
}
static int
p6_pcpu_fini(struct pmc_mdep *md, int cpu)
{
int first_ri, n;
struct p6_cpu *p6c;
struct pmc_cpu *pc;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[p6,%d] bad cpu %d", __LINE__, cpu));
PMCDBG(MDP,INI,0,"p6-cleanup cpu=%d", cpu);
p6c = p6_pcpu[cpu];
p6_pcpu[cpu] = NULL;
KASSERT(p6c != NULL, ("[p6,%d] null pcpu", __LINE__));
free(p6c, M_PMC);
first_ri = md->pmd_classdep[PMC_MDEP_CLASS_INDEX_P6].pcd_ri;
pc = pmc_pcpu[cpu];
for (n = 0; n < P6_NPMCS; n++)
pc->pc_hwpmcs[n + first_ri] = NULL;
return (0);
}
static int
p6_read_pmc(int cpu, int ri, pmc_value_t *v)
{
struct pmc *pm;
struct p6pmc_descr *pd;
pmc_value_t tmp;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[p6,%d] illegal cpu value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < P6_NPMCS,
("[p6,%d] illegal row-index %d", __LINE__, ri));
pm = p6_pcpu[cpu]->pc_p6pmcs[ri].phw_pmc;
pd = &p6_pmcdesc[ri];
KASSERT(pm,
("[p6,%d] cpu %d ri %d pmc not configured", __LINE__, cpu, ri));
tmp = rdmsr(pd->pm_pmc_msr) & P6_PERFCTR_READ_MASK;
if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm)))
*v = P6_PERFCTR_VALUE_TO_RELOAD_COUNT(tmp);
else
*v = tmp;
PMCDBG(MDP,REA,1, "p6-read cpu=%d ri=%d msr=0x%x -> v=%jx", cpu, ri,
pd->pm_pmc_msr, *v);
return (0);
}
static int
p6_write_pmc(int cpu, int ri, pmc_value_t v)
{
struct pmc *pm;
struct p6pmc_descr *pd;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[p6,%d] illegal cpu value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < P6_NPMCS,
("[p6,%d] illegal row-index %d", __LINE__, ri));
pm = p6_pcpu[cpu]->pc_p6pmcs[ri].phw_pmc;
pd = &p6_pmcdesc[ri];
KASSERT(pm,
("[p6,%d] cpu %d ri %d pmc not configured", __LINE__, cpu, ri));
PMCDBG(MDP,WRI,1, "p6-write cpu=%d ri=%d msr=0x%x v=%jx", cpu, ri,
pd->pm_pmc_msr, v);
if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm)))
v = P6_RELOAD_COUNT_TO_PERFCTR_VALUE(v);
wrmsr(pd->pm_pmc_msr, v & P6_PERFCTR_WRITE_MASK);
return (0);
}
static int
p6_config_pmc(int cpu, int ri, struct pmc *pm)
{
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[p6,%d] illegal CPU %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < P6_NPMCS,
("[p6,%d] illegal row-index %d", __LINE__, ri));
PMCDBG(MDP,CFG,1, "p6-config cpu=%d ri=%d pm=%p", cpu, ri, pm);
KASSERT(p6_pcpu[cpu] != NULL, ("[p6,%d] null per-cpu %d", __LINE__,
cpu));
p6_pcpu[cpu]->pc_p6pmcs[ri].phw_pmc = pm;
return (0);
}
/*
* Retrieve a configured PMC pointer from hardware state.
*/
static int
p6_get_config(int cpu, int ri, struct pmc **ppm)
{
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[p6,%d] illegal CPU %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < P6_NPMCS,
("[p6,%d] illegal row-index %d", __LINE__, ri));
*ppm = p6_pcpu[cpu]->pc_p6pmcs[ri].phw_pmc;
return (0);
}
/*
* A pmc may be allocated to a given row index if:
* - the event is valid for this CPU
* - the event is valid for this counter index
*/
static int
p6_allocate_pmc(int cpu, int ri, struct pmc *pm,
const struct pmc_op_pmcallocate *a)
{
uint32_t allowed_unitmask, caps, config, unitmask;
const struct p6pmc_descr *pd;
const struct p6_event_descr *pevent;
enum pmc_event ev;
(void) cpu;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[p6,%d] illegal CPU %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < P6_NPMCS,
("[p6,%d] illegal row-index value %d", __LINE__, ri));
pd = &p6_pmcdesc[ri];
PMCDBG(MDP,ALL,1, "p6-allocate ri=%d class=%d pmccaps=0x%x "
"reqcaps=0x%x", ri, pd->pm_descr.pd_class, pd->pm_descr.pd_caps,
pm->pm_caps);
/* check class */
if (pd->pm_descr.pd_class != a->pm_class)
return (EINVAL);
/* check requested capabilities */
caps = a->pm_caps;
if ((pd->pm_descr.pd_caps & caps) != caps)
return (EPERM);
ev = pm->pm_event;
if (ev < PMC_EV_P6_FIRST || ev > PMC_EV_P6_LAST)
return (EINVAL);
if ((pevent = p6_find_event(ev)) == NULL)
return (ESRCH);
if (!P6_EVENT_VALID_FOR_CPU(pevent, p6_cputype) ||
!P6_EVENT_VALID_FOR_CTR(pevent, (ri-1)))
return (EINVAL);
/* For certain events, Pentium M differs from the stock P6 */
allowed_unitmask = 0;
if (p6_cputype == PMC_CPU_INTEL_PM) {
if (ev == PMC_EV_P6_L2_LD || ev == PMC_EV_P6_L2_LINES_IN ||
ev == PMC_EV_P6_L2_LINES_OUT)
allowed_unitmask = P6_EVSEL_TO_UMASK(0x3F);
else if (ev == PMC_EV_P6_L2_M_LINES_OUTM)
allowed_unitmask = P6_EVSEL_TO_UMASK(0x30);
} else
allowed_unitmask = P6_EVSEL_TO_UMASK(pevent->pm_unitmask);
unitmask = a->pm_md.pm_ppro.pm_ppro_config & P6_EVSEL_UMASK_MASK;
if (unitmask & ~allowed_unitmask) /* disallow reserved bits */
return (EINVAL);
if (ev == PMC_EV_P6_MMX_UOPS_EXEC) /* hardcoded mask */
unitmask = P6_EVSEL_TO_UMASK(0x0F);
config = 0;
config |= P6_EVSEL_EVENT_SELECT(pevent->pm_evsel);
if (unitmask & (caps & PMC_CAP_QUALIFIER))
config |= unitmask;
if (caps & PMC_CAP_THRESHOLD)
config |= a->pm_md.pm_ppro.pm_ppro_config &
P6_EVSEL_CMASK_MASK;
/* set at least one of the 'usr' or 'os' caps */
if (caps & PMC_CAP_USER)
config |= P6_EVSEL_USR;
if (caps & PMC_CAP_SYSTEM)
config |= P6_EVSEL_OS;
if ((caps & (PMC_CAP_USER|PMC_CAP_SYSTEM)) == 0)
config |= (P6_EVSEL_USR|P6_EVSEL_OS);
if (caps & PMC_CAP_EDGE)
config |= P6_EVSEL_E;
if (caps & PMC_CAP_INVERT)
config |= P6_EVSEL_INV;
if (caps & PMC_CAP_INTERRUPT)
config |= P6_EVSEL_INT;
pm->pm_md.pm_ppro.pm_ppro_evsel = config;
PMCDBG(MDP,ALL,2, "p6-allocate config=0x%x", config);
return (0);
}
static int
p6_release_pmc(int cpu, int ri, struct pmc *pm)
{
(void) pm;
PMCDBG(MDP,REL,1, "p6-release cpu=%d ri=%d pm=%p", cpu, ri, pm);
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[p6,%d] illegal CPU value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < P6_NPMCS,
("[p6,%d] illegal row-index %d", __LINE__, ri));
KASSERT(p6_pcpu[cpu]->pc_p6pmcs[ri].phw_pmc == NULL,
("[p6,%d] PHW pmc non-NULL", __LINE__));
return (0);
}
static int
p6_start_pmc(int cpu, int ri)
{
uint32_t config;
struct pmc *pm;
struct p6_cpu *pc;
const struct p6pmc_descr *pd;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[p6,%d] illegal CPU value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < P6_NPMCS,
("[p6,%d] illegal row-index %d", __LINE__, ri));
pc = p6_pcpu[cpu];
pm = pc->pc_p6pmcs[ri].phw_pmc;
pd = &p6_pmcdesc[ri];
KASSERT(pm,
("[p6,%d] starting cpu%d,ri%d with no pmc configured",
__LINE__, cpu, ri));
PMCDBG(MDP,STA,1, "p6-start cpu=%d ri=%d", cpu, ri);
config = pm->pm_md.pm_ppro.pm_ppro_evsel;
PMCDBG(MDP,STA,2, "p6-start/2 cpu=%d ri=%d evselmsr=0x%x config=0x%x",
cpu, ri, pd->pm_evsel_msr, config);
P6_MARK_STARTED(pc, ri);
wrmsr(pd->pm_evsel_msr, config);
P6_SYNC_CTR_STATE(pc);
return (0);
}
static int
p6_stop_pmc(int cpu, int ri)
{
struct pmc *pm;
struct p6_cpu *pc;
struct p6pmc_descr *pd;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[p6,%d] illegal cpu value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < P6_NPMCS,
("[p6,%d] illegal row index %d", __LINE__, ri));
pc = p6_pcpu[cpu];
pm = pc->pc_p6pmcs[ri].phw_pmc;
pd = &p6_pmcdesc[ri];
KASSERT(pm,
("[p6,%d] cpu%d ri%d no configured PMC to stop", __LINE__,
cpu, ri));
PMCDBG(MDP,STO,1, "p6-stop cpu=%d ri=%d", cpu, ri);
wrmsr(pd->pm_evsel_msr, 0); /* stop hw */
P6_MARK_STOPPED(pc, ri); /* update software state */
P6_SYNC_CTR_STATE(pc); /* restart CTR1 if need be */
PMCDBG(MDP,STO,2, "p6-stop/2 cpu=%d ri=%d", cpu, ri);
return (0);
}
static int
p6_intr(int cpu, struct trapframe *tf)
{
int error, retval, ri;
uint32_t perf0cfg;
struct pmc *pm;
struct p6_cpu *pc;
pmc_value_t v;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[p6,%d] CPU %d out of range", __LINE__, cpu));
retval = 0;
pc = p6_pcpu[cpu];
/* stop both PMCs */
perf0cfg = rdmsr(P6_MSR_EVSEL0);
wrmsr(P6_MSR_EVSEL0, perf0cfg & ~P6_EVSEL_EN);
for (ri = 0; ri < P6_NPMCS; ri++) {
if ((pm = pc->pc_p6pmcs[ri].phw_pmc) == NULL ||
!PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm))) {
continue;
}
if (!P6_PMC_HAS_OVERFLOWED(ri))
continue;
retval = 1;
if (pm->pm_state != PMC_STATE_RUNNING)
continue;
error = pmc_process_interrupt(cpu, PMC_HR, pm, tf,
TRAPF_USERMODE(tf));
if (error)
P6_MARK_STOPPED(pc,ri);
/* reload sampling count */
v = pm->pm_sc.pm_reloadcount;
wrmsr(P6_MSR_PERFCTR0 + ri,
P6_RELOAD_COUNT_TO_PERFCTR_VALUE(v));
}
/*
* On P6 processors, the LAPIC needs to have its PMC interrupt
* unmasked after a PMC interrupt.
*/
if (retval)
lapic_reenable_pmc();
atomic_add_int(retval ? &pmc_stats.pm_intr_processed :
&pmc_stats.pm_intr_ignored, 1);
/* restart counters that can be restarted */
P6_SYNC_CTR_STATE(pc);
return (retval);
}
static int
p6_describe(int cpu, int ri, struct pmc_info *pi,
struct pmc **ppmc)
{
int error;
size_t copied;
struct pmc_hw *phw;
struct p6pmc_descr *pd;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[p6,%d] illegal CPU %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < P6_NPMCS,
("[p6,%d] row-index %d out of range", __LINE__, ri));
phw = pmc_pcpu[cpu]->pc_hwpmcs[ri];
pd = &p6_pmcdesc[ri];
KASSERT(phw == &p6_pcpu[cpu]->pc_p6pmcs[ri],
("[p6,%d] phw mismatch", __LINE__));
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);
}
static int
p6_get_msr(int ri, uint32_t *msr)
{
KASSERT(ri >= 0 && ri < P6_NPMCS,
("[p6,%d ri %d out of range", __LINE__, ri));
*msr = p6_pmcdesc[ri].pm_pmc_msr - P6_MSR_PERFCTR0;
return (0);
}
int
pmc_p6_initialize(struct pmc_mdep *md, int ncpus)
{
struct pmc_classdep *pcd;
KASSERT(cpu_vendor_id == CPU_VENDOR_INTEL,
("[p6,%d] Initializing non-intel processor", __LINE__));
PMCDBG(MDP,INI,1, "%s", "p6-initialize");
/* Allocate space for pointers to per-cpu descriptors. */
p6_pcpu = malloc(sizeof(struct p6_cpu **) * ncpus, M_PMC,
M_ZERO|M_WAITOK);
/* Fill in the class dependent descriptor. */
pcd = &md->pmd_classdep[PMC_MDEP_CLASS_INDEX_P6];
switch (md->pmd_cputype) {
/*
* P6 Family Processors
*/
case PMC_CPU_INTEL_P6:
case PMC_CPU_INTEL_CL:
case PMC_CPU_INTEL_PII:
case PMC_CPU_INTEL_PIII:
case PMC_CPU_INTEL_PM:
p6_cputype = md->pmd_cputype;
pcd->pcd_caps = P6_PMC_CAPS;
pcd->pcd_class = PMC_CLASS_P6;
pcd->pcd_num = P6_NPMCS;
pcd->pcd_ri = md->pmd_npmc;
pcd->pcd_width = 40;
pcd->pcd_allocate_pmc = p6_allocate_pmc;
pcd->pcd_config_pmc = p6_config_pmc;
pcd->pcd_describe = p6_describe;
pcd->pcd_get_config = p6_get_config;
pcd->pcd_get_msr = p6_get_msr;
pcd->pcd_pcpu_fini = p6_pcpu_fini;
pcd->pcd_pcpu_init = p6_pcpu_init;
pcd->pcd_read_pmc = p6_read_pmc;
pcd->pcd_release_pmc = p6_release_pmc;
pcd->pcd_start_pmc = p6_start_pmc;
pcd->pcd_stop_pmc = p6_stop_pmc;
pcd->pcd_write_pmc = p6_write_pmc;
md->pmd_pcpu_fini = NULL;
md->pmd_pcpu_init = NULL;
md->pmd_intr = p6_intr;
md->pmd_npmc += P6_NPMCS;
break;
default:
KASSERT(0,("[p6,%d] Unknown CPU type", __LINE__));
return ENOSYS;
}
return (0);
}
void
pmc_p6_finalize(struct pmc_mdep *md)
{
#if defined(INVARIANTS)
int i, ncpus;
#endif
KASSERT(p6_pcpu != NULL, ("[p6,%d] NULL p6_pcpu", __LINE__));
#if defined(INVARIANTS)
ncpus = pmc_cpu_max();
for (i = 0; i < ncpus; i++)
KASSERT(p6_pcpu[i] == NULL, ("[p6,%d] non-null pcpu %d",
__LINE__, i));
#endif
free(p6_pcpu, M_PMC);
p6_pcpu = NULL;
}
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