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freebsd-nq/lib/libpmc/libpmc.c
Mitchell Horne 99830f702d libpmc: remove mips support 
Bye bye!

Reviewed by:	imp, emaste
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D34083
2022-01-28 16:35:32 -04:00

1686 lines
39 KiB
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2003-2008 Joseph Koshy
* All rights reserved.
*
* 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/types.h>
#include <sys/param.h>
#include <sys/module.h>
#include <sys/pmc.h>
#include <sys/syscall.h>
#include <ctype.h>
#include <errno.h>
#include <err.h>
#include <fcntl.h>
#include <pmc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sysexits.h>
#include <unistd.h>
#include "libpmcinternal.h"
/* Function prototypes */
#if defined(__amd64__) || defined(__i386__)
static int k8_allocate_pmc(enum pmc_event _pe, char *_ctrspec,
struct pmc_op_pmcallocate *_pmc_config);
#endif
#if defined(__amd64__) || defined(__i386__)
static int tsc_allocate_pmc(enum pmc_event _pe, char *_ctrspec,
struct pmc_op_pmcallocate *_pmc_config);
#endif
#if defined(__arm__)
static int armv7_allocate_pmc(enum pmc_event _pe, char *_ctrspec,
struct pmc_op_pmcallocate *_pmc_config);
#endif
#if defined(__aarch64__)
static int arm64_allocate_pmc(enum pmc_event _pe, char *_ctrspec,
struct pmc_op_pmcallocate *_pmc_config);
#endif
static int soft_allocate_pmc(enum pmc_event _pe, char *_ctrspec,
struct pmc_op_pmcallocate *_pmc_config);
#if defined(__powerpc__)
static int powerpc_allocate_pmc(enum pmc_event _pe, char* ctrspec,
struct pmc_op_pmcallocate *_pmc_config);
#endif /* __powerpc__ */
#define PMC_CALL(cmd, params) \
syscall(pmc_syscall, PMC_OP_##cmd, (params))
/*
* Event aliases provide a way for the user to ask for generic events
* like "cache-misses", or "instructions-retired". These aliases are
* mapped to the appropriate canonical event descriptions using a
* lookup table.
*/
struct pmc_event_alias {
const char *pm_alias;
const char *pm_spec;
};
static const struct pmc_event_alias *pmc_mdep_event_aliases;
/*
* The pmc_event_descr structure maps symbolic names known to the user
* to integer codes used by the PMC KLD.
*/
struct pmc_event_descr {
const char *pm_ev_name;
enum pmc_event pm_ev_code;
};
/*
* The pmc_class_descr structure maps class name prefixes for
* event names to event tables and other PMC class data.
*/
struct pmc_class_descr {
const char *pm_evc_name;
size_t pm_evc_name_size;
enum pmc_class pm_evc_class;
const struct pmc_event_descr *pm_evc_event_table;
size_t pm_evc_event_table_size;
int (*pm_evc_allocate_pmc)(enum pmc_event _pe,
char *_ctrspec, struct pmc_op_pmcallocate *_pa);
};
#define PMC_TABLE_SIZE(N) (sizeof(N)/sizeof(N[0]))
#define PMC_EVENT_TABLE_SIZE(N) PMC_TABLE_SIZE(N##_event_table)
#undef __PMC_EV
#define __PMC_EV(C,N) { #N, PMC_EV_ ## C ## _ ## N },
/*
* PMC_CLASSDEP_TABLE(NAME, CLASS)
*
* Define a table mapping event names and aliases to HWPMC event IDs.
*/
#define PMC_CLASSDEP_TABLE(N, C) \
static const struct pmc_event_descr N##_event_table[] = \
{ \
__PMC_EV_##C() \
}
PMC_CLASSDEP_TABLE(iaf, IAF);
PMC_CLASSDEP_TABLE(k8, K8);
PMC_CLASSDEP_TABLE(armv7, ARMV7);
PMC_CLASSDEP_TABLE(armv8, ARMV8);
PMC_CLASSDEP_TABLE(ppc7450, PPC7450);
PMC_CLASSDEP_TABLE(ppc970, PPC970);
PMC_CLASSDEP_TABLE(e500, E500);
static struct pmc_event_descr soft_event_table[PMC_EV_DYN_COUNT];
#undef __PMC_EV_ALIAS
#define __PMC_EV_ALIAS(N,CODE) { N, PMC_EV_##CODE },
static const struct pmc_event_descr cortex_a8_event_table[] =
{
__PMC_EV_ALIAS_ARMV7_CORTEX_A8()
};
static const struct pmc_event_descr cortex_a9_event_table[] =
{
__PMC_EV_ALIAS_ARMV7_CORTEX_A9()
};
static const struct pmc_event_descr cortex_a53_event_table[] =
{
__PMC_EV_ALIAS_ARMV8_CORTEX_A53()
};
static const struct pmc_event_descr cortex_a57_event_table[] =
{
__PMC_EV_ALIAS_ARMV8_CORTEX_A57()
};
static const struct pmc_event_descr cortex_a76_event_table[] =
{
__PMC_EV_ALIAS_ARMV8_CORTEX_A76()
};
static const struct pmc_event_descr tsc_event_table[] =
{
__PMC_EV_ALIAS_TSC()
};
#undef PMC_CLASS_TABLE_DESC
#define PMC_CLASS_TABLE_DESC(NAME, CLASS, EVENTS, ALLOCATOR) \
static const struct pmc_class_descr NAME##_class_table_descr = \
{ \
.pm_evc_name = #CLASS "-", \
.pm_evc_name_size = sizeof(#CLASS "-") - 1, \
.pm_evc_class = PMC_CLASS_##CLASS , \
.pm_evc_event_table = EVENTS##_event_table , \
.pm_evc_event_table_size = \
PMC_EVENT_TABLE_SIZE(EVENTS), \
.pm_evc_allocate_pmc = ALLOCATOR##_allocate_pmc \
}
#if defined(__i386__) || defined(__amd64__)
PMC_CLASS_TABLE_DESC(k8, K8, k8, k8);
#endif
#if defined(__i386__) || defined(__amd64__)
PMC_CLASS_TABLE_DESC(tsc, TSC, tsc, tsc);
#endif
#if defined(__arm__)
PMC_CLASS_TABLE_DESC(cortex_a8, ARMV7, cortex_a8, armv7);
PMC_CLASS_TABLE_DESC(cortex_a9, ARMV7, cortex_a9, armv7);
#endif
#if defined(__aarch64__)
PMC_CLASS_TABLE_DESC(cortex_a53, ARMV8, cortex_a53, arm64);
PMC_CLASS_TABLE_DESC(cortex_a57, ARMV8, cortex_a57, arm64);
PMC_CLASS_TABLE_DESC(cortex_a76, ARMV8, cortex_a76, arm64);
#endif
#if defined(__powerpc__)
PMC_CLASS_TABLE_DESC(ppc7450, PPC7450, ppc7450, powerpc);
PMC_CLASS_TABLE_DESC(ppc970, PPC970, ppc970, powerpc);
PMC_CLASS_TABLE_DESC(e500, E500, e500, powerpc);
#endif
static struct pmc_class_descr soft_class_table_descr =
{
.pm_evc_name = "SOFT-",
.pm_evc_name_size = sizeof("SOFT-") - 1,
.pm_evc_class = PMC_CLASS_SOFT,
.pm_evc_event_table = NULL,
.pm_evc_event_table_size = 0,
.pm_evc_allocate_pmc = soft_allocate_pmc
};
#undef PMC_CLASS_TABLE_DESC
static const struct pmc_class_descr **pmc_class_table;
#define PMC_CLASS_TABLE_SIZE cpu_info.pm_nclass
/*
* Mapping tables, mapping enumeration values to human readable
* strings.
*/
static const char * pmc_capability_names[] = {
#undef __PMC_CAP
#define __PMC_CAP(N,V,D) #N ,
__PMC_CAPS()
};
struct pmc_class_map {
enum pmc_class pm_class;
const char *pm_name;
};
static const struct pmc_class_map pmc_class_names[] = {
#undef __PMC_CLASS
#define __PMC_CLASS(S,V,D) { .pm_class = PMC_CLASS_##S, .pm_name = #S } ,
__PMC_CLASSES()
};
struct pmc_cputype_map {
enum pmc_cputype pm_cputype;
const char *pm_name;
};
static const struct pmc_cputype_map pmc_cputype_names[] = {
#undef __PMC_CPU
#define __PMC_CPU(S, V, D) { .pm_cputype = PMC_CPU_##S, .pm_name = #S } ,
__PMC_CPUS()
};
static const char * pmc_disposition_names[] = {
#undef __PMC_DISP
#define __PMC_DISP(D) #D ,
__PMC_DISPOSITIONS()
};
static const char * pmc_mode_names[] = {
#undef __PMC_MODE
#define __PMC_MODE(M,N) #M ,
__PMC_MODES()
};
static const char * pmc_state_names[] = {
#undef __PMC_STATE
#define __PMC_STATE(S) #S ,
__PMC_STATES()
};
/*
* Filled in by pmc_init().
*/
static int pmc_syscall = -1;
static struct pmc_cpuinfo cpu_info;
static struct pmc_op_getdyneventinfo soft_event_info;
/* Event masks for events */
struct pmc_masks {
const char *pm_name;
const uint64_t pm_value;
};
#define PMCMASK(N,V) { .pm_name = #N, .pm_value = (V) }
#define NULLMASK { .pm_name = NULL }
#if defined(__amd64__) || defined(__i386__)
static int
pmc_parse_mask(const struct pmc_masks *pmask, char *p, uint64_t *evmask)
{
const struct pmc_masks *pm;
char *q, *r;
int c;
if (pmask == NULL) /* no mask keywords */
return (-1);
q = strchr(p, '='); /* skip '=' */
if (*++q == '\0') /* no more data */
return (-1);
c = 0; /* count of mask keywords seen */
while ((r = strsep(&q, "+")) != NULL) {
for (pm = pmask; pm->pm_name && strcasecmp(r, pm->pm_name);
pm++)
;
if (pm->pm_name == NULL) /* not found */
return (-1);
*evmask |= pm->pm_value;
c++;
}
return (c);
}
#endif
#define KWMATCH(p,kw) (strcasecmp((p), (kw)) == 0)
#define KWPREFIXMATCH(p,kw) (strncasecmp((p), (kw), sizeof((kw)) - 1) == 0)
#define EV_ALIAS(N,S) { .pm_alias = N, .pm_spec = S }
#if defined(__amd64__) || defined(__i386__)
/*
* AMD K8 PMCs.
*
*/
static struct pmc_event_alias k8_aliases[] = {
EV_ALIAS("branches", "k8-fr-retired-taken-branches"),
EV_ALIAS("branch-mispredicts",
"k8-fr-retired-taken-branches-mispredicted"),
EV_ALIAS("cycles", "tsc"),
EV_ALIAS("dc-misses", "k8-dc-miss"),
EV_ALIAS("ic-misses", "k8-ic-miss"),
EV_ALIAS("instructions", "k8-fr-retired-x86-instructions"),
EV_ALIAS("interrupts", "k8-fr-taken-hardware-interrupts"),
EV_ALIAS("unhalted-cycles", "k8-bu-cpu-clk-unhalted"),
EV_ALIAS(NULL, NULL)
};
#define __K8MASK(N,V) PMCMASK(N,(1 << (V)))
/*
* Parsing tables
*/
/* fp dispatched fpu ops */
static const struct pmc_masks k8_mask_fdfo[] = {
__K8MASK(add-pipe-excluding-junk-ops, 0),
__K8MASK(multiply-pipe-excluding-junk-ops, 1),
__K8MASK(store-pipe-excluding-junk-ops, 2),
__K8MASK(add-pipe-junk-ops, 3),
__K8MASK(multiply-pipe-junk-ops, 4),
__K8MASK(store-pipe-junk-ops, 5),
NULLMASK
};
/* ls segment register loads */
static const struct pmc_masks k8_mask_lsrl[] = {
__K8MASK(es, 0),
__K8MASK(cs, 1),
__K8MASK(ss, 2),
__K8MASK(ds, 3),
__K8MASK(fs, 4),
__K8MASK(gs, 5),
__K8MASK(hs, 6),
NULLMASK
};
/* ls locked operation */
static const struct pmc_masks k8_mask_llo[] = {
__K8MASK(locked-instructions, 0),
__K8MASK(cycles-in-request, 1),
__K8MASK(cycles-to-complete, 2),
NULLMASK
};
/* dc refill from {l2,system} and dc copyback */
static const struct pmc_masks k8_mask_dc[] = {
__K8MASK(invalid, 0),
__K8MASK(shared, 1),
__K8MASK(exclusive, 2),
__K8MASK(owner, 3),
__K8MASK(modified, 4),
NULLMASK
};
/* dc one bit ecc error */
static const struct pmc_masks k8_mask_dobee[] = {
__K8MASK(scrubber, 0),
__K8MASK(piggyback, 1),
NULLMASK
};
/* dc dispatched prefetch instructions */
static const struct pmc_masks k8_mask_ddpi[] = {
__K8MASK(load, 0),
__K8MASK(store, 1),
__K8MASK(nta, 2),
NULLMASK
};
/* dc dcache accesses by locks */
static const struct pmc_masks k8_mask_dabl[] = {
__K8MASK(accesses, 0),
__K8MASK(misses, 1),
NULLMASK
};
/* bu internal l2 request */
static const struct pmc_masks k8_mask_bilr[] = {
__K8MASK(ic-fill, 0),
__K8MASK(dc-fill, 1),
__K8MASK(tlb-reload, 2),
__K8MASK(tag-snoop, 3),
__K8MASK(cancelled, 4),
NULLMASK
};
/* bu fill request l2 miss */
static const struct pmc_masks k8_mask_bfrlm[] = {
__K8MASK(ic-fill, 0),
__K8MASK(dc-fill, 1),
__K8MASK(tlb-reload, 2),
NULLMASK
};
/* bu fill into l2 */
static const struct pmc_masks k8_mask_bfil[] = {
__K8MASK(dirty-l2-victim, 0),
__K8MASK(victim-from-l2, 1),
NULLMASK
};
/* fr retired fpu instructions */
static const struct pmc_masks k8_mask_frfi[] = {
__K8MASK(x87, 0),
__K8MASK(mmx-3dnow, 1),
__K8MASK(packed-sse-sse2, 2),
__K8MASK(scalar-sse-sse2, 3),
NULLMASK
};
/* fr retired fastpath double op instructions */
static const struct pmc_masks k8_mask_frfdoi[] = {
__K8MASK(low-op-pos-0, 0),
__K8MASK(low-op-pos-1, 1),
__K8MASK(low-op-pos-2, 2),
NULLMASK
};
/* fr fpu exceptions */
static const struct pmc_masks k8_mask_ffe[] = {
__K8MASK(x87-reclass-microfaults, 0),
__K8MASK(sse-retype-microfaults, 1),
__K8MASK(sse-reclass-microfaults, 2),
__K8MASK(sse-and-x87-microtraps, 3),
NULLMASK
};
/* nb memory controller page access event */
static const struct pmc_masks k8_mask_nmcpae[] = {
__K8MASK(page-hit, 0),
__K8MASK(page-miss, 1),
__K8MASK(page-conflict, 2),
NULLMASK
};
/* nb memory controller turnaround */
static const struct pmc_masks k8_mask_nmct[] = {
__K8MASK(dimm-turnaround, 0),
__K8MASK(read-to-write-turnaround, 1),
__K8MASK(write-to-read-turnaround, 2),
NULLMASK
};
/* nb memory controller bypass saturation */
static const struct pmc_masks k8_mask_nmcbs[] = {
__K8MASK(memory-controller-hi-pri-bypass, 0),
__K8MASK(memory-controller-lo-pri-bypass, 1),
__K8MASK(dram-controller-interface-bypass, 2),
__K8MASK(dram-controller-queue-bypass, 3),
NULLMASK
};
/* nb sized commands */
static const struct pmc_masks k8_mask_nsc[] = {
__K8MASK(nonpostwrszbyte, 0),
__K8MASK(nonpostwrszdword, 1),
__K8MASK(postwrszbyte, 2),
__K8MASK(postwrszdword, 3),
__K8MASK(rdszbyte, 4),
__K8MASK(rdszdword, 5),
__K8MASK(rdmodwr, 6),
NULLMASK
};
/* nb probe result */
static const struct pmc_masks k8_mask_npr[] = {
__K8MASK(probe-miss, 0),
__K8MASK(probe-hit, 1),
__K8MASK(probe-hit-dirty-no-memory-cancel, 2),
__K8MASK(probe-hit-dirty-with-memory-cancel, 3),
NULLMASK
};
/* nb hypertransport bus bandwidth */
static const struct pmc_masks k8_mask_nhbb[] = { /* HT bus bandwidth */
__K8MASK(command, 0),
__K8MASK(data, 1),
__K8MASK(buffer-release, 2),
__K8MASK(nop, 3),
NULLMASK
};
#undef __K8MASK
#define K8_KW_COUNT "count"
#define K8_KW_EDGE "edge"
#define K8_KW_INV "inv"
#define K8_KW_MASK "mask"
#define K8_KW_OS "os"
#define K8_KW_USR "usr"
static int
k8_allocate_pmc(enum pmc_event pe, char *ctrspec,
struct pmc_op_pmcallocate *pmc_config)
{
char *e, *p, *q;
int n;
uint32_t count;
uint64_t evmask;
const struct pmc_masks *pm, *pmask;
pmc_config->pm_caps |= (PMC_CAP_READ | PMC_CAP_WRITE);
pmc_config->pm_md.pm_amd.pm_amd_config = 0;
pmask = NULL;
evmask = 0;
#define __K8SETMASK(M) pmask = k8_mask_##M
/* setup parsing tables */
switch (pe) {
case PMC_EV_K8_FP_DISPATCHED_FPU_OPS:
__K8SETMASK(fdfo);
break;
case PMC_EV_K8_LS_SEGMENT_REGISTER_LOAD:
__K8SETMASK(lsrl);
break;
case PMC_EV_K8_LS_LOCKED_OPERATION:
__K8SETMASK(llo);
break;
case PMC_EV_K8_DC_REFILL_FROM_L2:
case PMC_EV_K8_DC_REFILL_FROM_SYSTEM:
case PMC_EV_K8_DC_COPYBACK:
__K8SETMASK(dc);
break;
case PMC_EV_K8_DC_ONE_BIT_ECC_ERROR:
__K8SETMASK(dobee);
break;
case PMC_EV_K8_DC_DISPATCHED_PREFETCH_INSTRUCTIONS:
__K8SETMASK(ddpi);
break;
case PMC_EV_K8_DC_DCACHE_ACCESSES_BY_LOCKS:
__K8SETMASK(dabl);
break;
case PMC_EV_K8_BU_INTERNAL_L2_REQUEST:
__K8SETMASK(bilr);
break;
case PMC_EV_K8_BU_FILL_REQUEST_L2_MISS:
__K8SETMASK(bfrlm);
break;
case PMC_EV_K8_BU_FILL_INTO_L2:
__K8SETMASK(bfil);
break;
case PMC_EV_K8_FR_RETIRED_FPU_INSTRUCTIONS:
__K8SETMASK(frfi);
break;
case PMC_EV_K8_FR_RETIRED_FASTPATH_DOUBLE_OP_INSTRUCTIONS:
__K8SETMASK(frfdoi);
break;
case PMC_EV_K8_FR_FPU_EXCEPTIONS:
__K8SETMASK(ffe);
break;
case PMC_EV_K8_NB_MEMORY_CONTROLLER_PAGE_ACCESS_EVENT:
__K8SETMASK(nmcpae);
break;
case PMC_EV_K8_NB_MEMORY_CONTROLLER_TURNAROUND:
__K8SETMASK(nmct);
break;
case PMC_EV_K8_NB_MEMORY_CONTROLLER_BYPASS_SATURATION:
__K8SETMASK(nmcbs);
break;
case PMC_EV_K8_NB_SIZED_COMMANDS:
__K8SETMASK(nsc);
break;
case PMC_EV_K8_NB_PROBE_RESULT:
__K8SETMASK(npr);
break;
case PMC_EV_K8_NB_HT_BUS0_BANDWIDTH:
case PMC_EV_K8_NB_HT_BUS1_BANDWIDTH:
case PMC_EV_K8_NB_HT_BUS2_BANDWIDTH:
__K8SETMASK(nhbb);
break;
default:
break; /* no options defined */
}
while ((p = strsep(&ctrspec, ",")) != NULL) {
if (KWPREFIXMATCH(p, K8_KW_COUNT "=")) {
q = strchr(p, '=');
if (*++q == '\0') /* skip '=' */
return (-1);
count = strtol(q, &e, 0);
if (e == q || *e != '\0')
return (-1);
pmc_config->pm_caps |= PMC_CAP_THRESHOLD;
pmc_config->pm_md.pm_amd.pm_amd_config |=
AMD_PMC_TO_COUNTER(count);
} else if (KWMATCH(p, K8_KW_EDGE)) {
pmc_config->pm_caps |= PMC_CAP_EDGE;
} else if (KWMATCH(p, K8_KW_INV)) {
pmc_config->pm_caps |= PMC_CAP_INVERT;
} else if (KWPREFIXMATCH(p, K8_KW_MASK "=")) {
if ((n = pmc_parse_mask(pmask, p, &evmask)) < 0)
return (-1);
pmc_config->pm_caps |= PMC_CAP_QUALIFIER;
} else if (KWMATCH(p, K8_KW_OS)) {
pmc_config->pm_caps |= PMC_CAP_SYSTEM;
} else if (KWMATCH(p, K8_KW_USR)) {
pmc_config->pm_caps |= PMC_CAP_USER;
} else
return (-1);
}
/* other post processing */
switch (pe) {
case PMC_EV_K8_FP_DISPATCHED_FPU_OPS:
case PMC_EV_K8_FP_CYCLES_WITH_NO_FPU_OPS_RETIRED:
case PMC_EV_K8_FP_DISPATCHED_FPU_FAST_FLAG_OPS:
case PMC_EV_K8_FR_RETIRED_FASTPATH_DOUBLE_OP_INSTRUCTIONS:
case PMC_EV_K8_FR_RETIRED_FPU_INSTRUCTIONS:
case PMC_EV_K8_FR_FPU_EXCEPTIONS:
/* XXX only available in rev B and later */
break;
case PMC_EV_K8_DC_DCACHE_ACCESSES_BY_LOCKS:
/* XXX only available in rev C and later */
break;
case PMC_EV_K8_LS_LOCKED_OPERATION:
/* XXX CPU Rev A,B evmask is to be zero */
if (evmask & (evmask - 1)) /* > 1 bit set */
return (-1);
if (evmask == 0) {
evmask = 0x01; /* Rev C and later: #instrs */
pmc_config->pm_caps |= PMC_CAP_QUALIFIER;
}
break;
default:
if (evmask == 0 && pmask != NULL) {
for (pm = pmask; pm->pm_name; pm++)
evmask |= pm->pm_value;
pmc_config->pm_caps |= PMC_CAP_QUALIFIER;
}
}
if (pmc_config->pm_caps & PMC_CAP_QUALIFIER)
pmc_config->pm_md.pm_amd.pm_amd_config =
AMD_PMC_TO_UNITMASK(evmask);
return (0);
}
#endif
#if defined(__i386__) || defined(__amd64__)
static int
tsc_allocate_pmc(enum pmc_event pe, char *ctrspec,
struct pmc_op_pmcallocate *pmc_config)
{
if (pe != PMC_EV_TSC_TSC)
return (-1);
/* TSC events must be unqualified. */
if (ctrspec && *ctrspec != '\0')
return (-1);
pmc_config->pm_md.pm_amd.pm_amd_config = 0;
pmc_config->pm_caps |= PMC_CAP_READ;
return (0);
}
#endif
static struct pmc_event_alias generic_aliases[] = {
EV_ALIAS("instructions", "SOFT-CLOCK.HARD"),
EV_ALIAS(NULL, NULL)
};
static int
soft_allocate_pmc(enum pmc_event pe, char *ctrspec,
struct pmc_op_pmcallocate *pmc_config)
{
(void)ctrspec;
(void)pmc_config;
if ((int)pe < PMC_EV_SOFT_FIRST || (int)pe > PMC_EV_SOFT_LAST)
return (-1);
pmc_config->pm_caps |= (PMC_CAP_READ | PMC_CAP_WRITE);
return (0);
}
#if defined(__arm__)
static struct pmc_event_alias cortex_a8_aliases[] = {
EV_ALIAS("dc-misses", "L1_DCACHE_REFILL"),
EV_ALIAS("ic-misses", "L1_ICACHE_REFILL"),
EV_ALIAS("instructions", "INSTR_EXECUTED"),
EV_ALIAS(NULL, NULL)
};
static struct pmc_event_alias cortex_a9_aliases[] = {
EV_ALIAS("dc-misses", "L1_DCACHE_REFILL"),
EV_ALIAS("ic-misses", "L1_ICACHE_REFILL"),
EV_ALIAS("instructions", "INSTR_EXECUTED"),
EV_ALIAS(NULL, NULL)
};
static int
armv7_allocate_pmc(enum pmc_event pe, char *ctrspec __unused,
struct pmc_op_pmcallocate *pmc_config __unused)
{
switch (pe) {
default:
break;
}
return (0);
}
#endif
#if defined(__aarch64__)
static struct pmc_event_alias cortex_a53_aliases[] = {
EV_ALIAS(NULL, NULL)
};
static struct pmc_event_alias cortex_a57_aliases[] = {
EV_ALIAS(NULL, NULL)
};
static struct pmc_event_alias cortex_a76_aliases[] = {
EV_ALIAS(NULL, NULL)
};
static int
arm64_allocate_pmc(enum pmc_event pe, char *ctrspec __unused,
struct pmc_op_pmcallocate *pmc_config __unused)
{
switch (pe) {
default:
break;
}
return (0);
}
#endif
#if defined(__powerpc__)
static struct pmc_event_alias ppc7450_aliases[] = {
EV_ALIAS("instructions", "INSTR_COMPLETED"),
EV_ALIAS("branches", "BRANCHES_COMPLETED"),
EV_ALIAS("branch-mispredicts", "MISPREDICTED_BRANCHES"),
EV_ALIAS(NULL, NULL)
};
static struct pmc_event_alias ppc970_aliases[] = {
EV_ALIAS("instructions", "INSTR_COMPLETED"),
EV_ALIAS("cycles", "CYCLES"),
EV_ALIAS(NULL, NULL)
};
static struct pmc_event_alias e500_aliases[] = {
EV_ALIAS("instructions", "INSTR_COMPLETED"),
EV_ALIAS("cycles", "CYCLES"),
EV_ALIAS(NULL, NULL)
};
#define POWERPC_KW_OS "os"
#define POWERPC_KW_USR "usr"
#define POWERPC_KW_ANYTHREAD "anythread"
static int
powerpc_allocate_pmc(enum pmc_event pe, char *ctrspec __unused,
struct pmc_op_pmcallocate *pmc_config __unused)
{
char *p;
(void) pe;
pmc_config->pm_caps |= (PMC_CAP_READ | PMC_CAP_WRITE);
while ((p = strsep(&ctrspec, ",")) != NULL) {
if (KWMATCH(p, POWERPC_KW_OS))
pmc_config->pm_caps |= PMC_CAP_SYSTEM;
else if (KWMATCH(p, POWERPC_KW_USR))
pmc_config->pm_caps |= PMC_CAP_USER;
else if (KWMATCH(p, POWERPC_KW_ANYTHREAD))
pmc_config->pm_caps |= (PMC_CAP_USER | PMC_CAP_SYSTEM);
else
return (-1);
}
return (0);
}
#endif /* __powerpc__ */
/*
* Match an event name `name' with its canonical form.
*
* Matches are case insensitive and spaces, periods, underscores and
* hyphen characters are considered to match each other.
*
* Returns 1 for a match, 0 otherwise.
*/
static int
pmc_match_event_name(const char *name, const char *canonicalname)
{
int cc, nc;
const unsigned char *c, *n;
c = (const unsigned char *) canonicalname;
n = (const unsigned char *) name;
for (; (nc = *n) && (cc = *c); n++, c++) {
if ((nc == ' ' || nc == '_' || nc == '-' || nc == '.') &&
(cc == ' ' || cc == '_' || cc == '-' || cc == '.'))
continue;
if (toupper(nc) == toupper(cc))
continue;
return (0);
}
if (*n == '\0' && *c == '\0')
return (1);
return (0);
}
/*
* Match an event name against all the event named supported by a
* PMC class.
*
* Returns an event descriptor pointer on match or NULL otherwise.
*/
static const struct pmc_event_descr *
pmc_match_event_class(const char *name,
const struct pmc_class_descr *pcd)
{
size_t n;
const struct pmc_event_descr *ev;
ev = pcd->pm_evc_event_table;
for (n = 0; n < pcd->pm_evc_event_table_size; n++, ev++)
if (pmc_match_event_name(name, ev->pm_ev_name))
return (ev);
return (NULL);
}
/*
* API entry points
*/
int
pmc_allocate(const char *ctrspec, enum pmc_mode mode,
uint32_t flags, int cpu, pmc_id_t *pmcid,
uint64_t count)
{
size_t n;
int retval;
char *r, *spec_copy;
const char *ctrname;
const struct pmc_event_descr *ev;
const struct pmc_event_alias *alias;
struct pmc_op_pmcallocate pmc_config;
const struct pmc_class_descr *pcd;
spec_copy = NULL;
retval = -1;
if (mode != PMC_MODE_SS && mode != PMC_MODE_TS &&
mode != PMC_MODE_SC && mode != PMC_MODE_TC) {
errno = EINVAL;
goto out;
}
bzero(&pmc_config, sizeof(pmc_config));
pmc_config.pm_cpu = cpu;
pmc_config.pm_mode = mode;
pmc_config.pm_flags = flags;
pmc_config.pm_count = count;
if (PMC_IS_SAMPLING_MODE(mode))
pmc_config.pm_caps |= PMC_CAP_INTERRUPT;
/*
* Try to pull the raw event ID directly from the pmu-events table. If
* this is unsupported on the platform, or the event is not found,
* continue with searching the regular event tables.
*/
r = spec_copy = strdup(ctrspec);
ctrname = strsep(&r, ",");
if (pmc_pmu_enabled()) {
if (pmc_pmu_pmcallocate(ctrname, &pmc_config) == 0)
goto found;
/* Otherwise, reset any changes */
pmc_config.pm_ev = 0;
pmc_config.pm_caps = 0;
pmc_config.pm_class = 0;
}
free(spec_copy);
spec_copy = NULL;
/* replace an event alias with the canonical event specifier */
if (pmc_mdep_event_aliases)
for (alias = pmc_mdep_event_aliases; alias->pm_alias; alias++)
if (!strcasecmp(ctrspec, alias->pm_alias)) {
spec_copy = strdup(alias->pm_spec);
break;
}
if (spec_copy == NULL)
spec_copy = strdup(ctrspec);
r = spec_copy;
ctrname = strsep(&r, ",");
/*
* If a explicit class prefix was given by the user, restrict the
* search for the event to the specified PMC class.
*/
ev = NULL;
for (n = 0; n < PMC_CLASS_TABLE_SIZE; n++) {
pcd = pmc_class_table[n];
if (pcd != NULL && strncasecmp(ctrname, pcd->pm_evc_name,
pcd->pm_evc_name_size) == 0) {
if ((ev = pmc_match_event_class(ctrname +
pcd->pm_evc_name_size, pcd)) == NULL) {
errno = EINVAL;
goto out;
}
break;
}
}
/*
* Otherwise, search for this event in all compatible PMC
* classes.
*/
for (n = 0; ev == NULL && n < PMC_CLASS_TABLE_SIZE; n++) {
pcd = pmc_class_table[n];
if (pcd != NULL)
ev = pmc_match_event_class(ctrname, pcd);
}
if (ev == NULL) {
errno = EINVAL;
goto out;
}
pmc_config.pm_ev = ev->pm_ev_code;
pmc_config.pm_class = pcd->pm_evc_class;
if (pcd->pm_evc_allocate_pmc(ev->pm_ev_code, r, &pmc_config) < 0) {
errno = EINVAL;
goto out;
}
found:
if (PMC_CALL(PMCALLOCATE, &pmc_config) == 0) {
*pmcid = pmc_config.pm_pmcid;
retval = 0;
}
out:
if (spec_copy)
free(spec_copy);
return (retval);
}
int
pmc_attach(pmc_id_t pmc, pid_t pid)
{
struct pmc_op_pmcattach pmc_attach_args;
pmc_attach_args.pm_pmc = pmc;
pmc_attach_args.pm_pid = pid;
return (PMC_CALL(PMCATTACH, &pmc_attach_args));
}
int
pmc_capabilities(pmc_id_t pmcid, uint32_t *caps)
{
unsigned int i;
enum pmc_class cl;
cl = PMC_ID_TO_CLASS(pmcid);
for (i = 0; i < cpu_info.pm_nclass; i++)
if (cpu_info.pm_classes[i].pm_class == cl) {
*caps = cpu_info.pm_classes[i].pm_caps;
return (0);
}
errno = EINVAL;
return (-1);
}
int
pmc_configure_logfile(int fd)
{
struct pmc_op_configurelog cla;
cla.pm_logfd = fd;
if (PMC_CALL(CONFIGURELOG, &cla) < 0)
return (-1);
return (0);
}
int
pmc_cpuinfo(const struct pmc_cpuinfo **pci)
{
if (pmc_syscall == -1) {
errno = ENXIO;
return (-1);
}
*pci = &cpu_info;
return (0);
}
int
pmc_detach(pmc_id_t pmc, pid_t pid)
{
struct pmc_op_pmcattach pmc_detach_args;
pmc_detach_args.pm_pmc = pmc;
pmc_detach_args.pm_pid = pid;
return (PMC_CALL(PMCDETACH, &pmc_detach_args));
}
int
pmc_disable(int cpu, int pmc)
{
struct pmc_op_pmcadmin ssa;
ssa.pm_cpu = cpu;
ssa.pm_pmc = pmc;
ssa.pm_state = PMC_STATE_DISABLED;
return (PMC_CALL(PMCADMIN, &ssa));
}
int
pmc_enable(int cpu, int pmc)
{
struct pmc_op_pmcadmin ssa;
ssa.pm_cpu = cpu;
ssa.pm_pmc = pmc;
ssa.pm_state = PMC_STATE_FREE;
return (PMC_CALL(PMCADMIN, &ssa));
}
/*
* Return a list of events known to a given PMC class. 'cl' is the
* PMC class identifier, 'eventnames' is the returned list of 'const
* char *' pointers pointing to the names of the events. 'nevents' is
* the number of event name pointers returned.
*
* The space for 'eventnames' is allocated using malloc(3). The caller
* is responsible for freeing this space when done.
*/
int
pmc_event_names_of_class(enum pmc_class cl, const char ***eventnames,
int *nevents)
{
int count;
const char **names;
const struct pmc_event_descr *ev;
switch (cl)
{
case PMC_CLASS_IAF:
ev = iaf_event_table;
count = PMC_EVENT_TABLE_SIZE(iaf);
break;
case PMC_CLASS_TSC:
ev = tsc_event_table;
count = PMC_EVENT_TABLE_SIZE(tsc);
break;
case PMC_CLASS_K8:
ev = k8_event_table;
count = PMC_EVENT_TABLE_SIZE(k8);
break;
case PMC_CLASS_ARMV7:
switch (cpu_info.pm_cputype) {
default:
case PMC_CPU_ARMV7_CORTEX_A8:
ev = cortex_a8_event_table;
count = PMC_EVENT_TABLE_SIZE(cortex_a8);
break;
case PMC_CPU_ARMV7_CORTEX_A9:
ev = cortex_a9_event_table;
count = PMC_EVENT_TABLE_SIZE(cortex_a9);
break;
}
break;
case PMC_CLASS_ARMV8:
switch (cpu_info.pm_cputype) {
default:
case PMC_CPU_ARMV8_CORTEX_A53:
ev = cortex_a53_event_table;
count = PMC_EVENT_TABLE_SIZE(cortex_a53);
break;
case PMC_CPU_ARMV8_CORTEX_A57:
ev = cortex_a57_event_table;
count = PMC_EVENT_TABLE_SIZE(cortex_a57);
break;
case PMC_CPU_ARMV8_CORTEX_A76:
ev = cortex_a76_event_table;
count = PMC_EVENT_TABLE_SIZE(cortex_a76);
break;
}
break;
case PMC_CLASS_PPC7450:
ev = ppc7450_event_table;
count = PMC_EVENT_TABLE_SIZE(ppc7450);
break;
case PMC_CLASS_PPC970:
ev = ppc970_event_table;
count = PMC_EVENT_TABLE_SIZE(ppc970);
break;
case PMC_CLASS_E500:
ev = e500_event_table;
count = PMC_EVENT_TABLE_SIZE(e500);
break;
case PMC_CLASS_SOFT:
ev = soft_event_table;
count = soft_event_info.pm_nevent;
break;
default:
errno = EINVAL;
return (-1);
}
if ((names = malloc(count * sizeof(const char *))) == NULL)
return (-1);
*eventnames = names;
*nevents = count;
for (;count--; ev++, names++)
*names = ev->pm_ev_name;
return (0);
}
int
pmc_flush_logfile(void)
{
return (PMC_CALL(FLUSHLOG,0));
}
int
pmc_close_logfile(void)
{
return (PMC_CALL(CLOSELOG,0));
}
int
pmc_get_driver_stats(struct pmc_driverstats *ds)
{
struct pmc_op_getdriverstats gms;
if (PMC_CALL(GETDRIVERSTATS, &gms) < 0)
return (-1);
/* copy out fields in the current userland<->library interface */
ds->pm_intr_ignored = gms.pm_intr_ignored;
ds->pm_intr_processed = gms.pm_intr_processed;
ds->pm_intr_bufferfull = gms.pm_intr_bufferfull;
ds->pm_syscalls = gms.pm_syscalls;
ds->pm_syscall_errors = gms.pm_syscall_errors;
ds->pm_buffer_requests = gms.pm_buffer_requests;
ds->pm_buffer_requests_failed = gms.pm_buffer_requests_failed;
ds->pm_log_sweeps = gms.pm_log_sweeps;
return (0);
}
int
pmc_get_msr(pmc_id_t pmc, uint32_t *msr)
{
struct pmc_op_getmsr gm;
gm.pm_pmcid = pmc;
if (PMC_CALL(PMCGETMSR, &gm) < 0)
return (-1);
*msr = gm.pm_msr;
return (0);
}
int
pmc_init(void)
{
int error, pmc_mod_id;
unsigned int n;
uint32_t abi_version;
struct module_stat pmc_modstat;
struct pmc_op_getcpuinfo op_cpu_info;
if (pmc_syscall != -1) /* already inited */
return (0);
/* retrieve the system call number from the KLD */
if ((pmc_mod_id = modfind(PMC_MODULE_NAME)) < 0)
return (-1);
pmc_modstat.version = sizeof(struct module_stat);
if ((error = modstat(pmc_mod_id, &pmc_modstat)) < 0)
return (-1);
pmc_syscall = pmc_modstat.data.intval;
/* check the kernel module's ABI against our compiled-in version */
abi_version = PMC_VERSION;
if (PMC_CALL(GETMODULEVERSION, &abi_version) < 0)
return (pmc_syscall = -1);
/* ignore patch & minor numbers for the comparison */
if ((abi_version & 0xFF000000) != (PMC_VERSION & 0xFF000000)) {
errno = EPROGMISMATCH;
return (pmc_syscall = -1);
}
bzero(&op_cpu_info, sizeof(op_cpu_info));
if (PMC_CALL(GETCPUINFO, &op_cpu_info) < 0)
return (pmc_syscall = -1);
cpu_info.pm_cputype = op_cpu_info.pm_cputype;
cpu_info.pm_ncpu = op_cpu_info.pm_ncpu;
cpu_info.pm_npmc = op_cpu_info.pm_npmc;
cpu_info.pm_nclass = op_cpu_info.pm_nclass;
for (n = 0; n < op_cpu_info.pm_nclass; n++)
memcpy(&cpu_info.pm_classes[n], &op_cpu_info.pm_classes[n],
sizeof(cpu_info.pm_classes[n]));
pmc_class_table = malloc(PMC_CLASS_TABLE_SIZE *
sizeof(struct pmc_class_descr *));
if (pmc_class_table == NULL)
return (-1);
for (n = 0; n < PMC_CLASS_TABLE_SIZE; n++)
pmc_class_table[n] = NULL;
/*
* Get soft events list.
*/
soft_event_info.pm_class = PMC_CLASS_SOFT;
if (PMC_CALL(GETDYNEVENTINFO, &soft_event_info) < 0)
return (pmc_syscall = -1);
/* Map soft events to static list. */
for (n = 0; n < soft_event_info.pm_nevent; n++) {
soft_event_table[n].pm_ev_name =
soft_event_info.pm_events[n].pm_ev_name;
soft_event_table[n].pm_ev_code =
soft_event_info.pm_events[n].pm_ev_code;
}
soft_class_table_descr.pm_evc_event_table_size = \
soft_event_info.pm_nevent;
soft_class_table_descr.pm_evc_event_table = \
soft_event_table;
/*
* Fill in the class table.
*/
n = 0;
/* Fill soft events information. */
pmc_class_table[n++] = &soft_class_table_descr;
#if defined(__amd64__) || defined(__i386__)
if (cpu_info.pm_cputype != PMC_CPU_GENERIC)
pmc_class_table[n++] = &tsc_class_table_descr;
#endif
#define PMC_MDEP_INIT(C) pmc_mdep_event_aliases = C##_aliases
/* Configure the event name parser. */
switch (cpu_info.pm_cputype) {
#if defined(__amd64__) || defined(__i386__)
case PMC_CPU_AMD_K8:
PMC_MDEP_INIT(k8);
pmc_class_table[n] = &k8_class_table_descr;
break;
#endif
case PMC_CPU_GENERIC:
PMC_MDEP_INIT(generic);
break;
#if defined(__arm__)
case PMC_CPU_ARMV7_CORTEX_A8:
PMC_MDEP_INIT(cortex_a8);
pmc_class_table[n] = &cortex_a8_class_table_descr;
break;
case PMC_CPU_ARMV7_CORTEX_A9:
PMC_MDEP_INIT(cortex_a9);
pmc_class_table[n] = &cortex_a9_class_table_descr;
break;
#endif
#if defined(__aarch64__)
case PMC_CPU_ARMV8_CORTEX_A53:
PMC_MDEP_INIT(cortex_a53);
pmc_class_table[n] = &cortex_a53_class_table_descr;
break;
case PMC_CPU_ARMV8_CORTEX_A57:
PMC_MDEP_INIT(cortex_a57);
pmc_class_table[n] = &cortex_a57_class_table_descr;
break;
case PMC_CPU_ARMV8_CORTEX_A76:
PMC_MDEP_INIT(cortex_a76);
pmc_class_table[n] = &cortex_a76_class_table_descr;
break;
#endif
#if defined(__powerpc__)
case PMC_CPU_PPC_7450:
PMC_MDEP_INIT(ppc7450);
pmc_class_table[n] = &ppc7450_class_table_descr;
break;
case PMC_CPU_PPC_970:
PMC_MDEP_INIT(ppc970);
pmc_class_table[n] = &ppc970_class_table_descr;
break;
case PMC_CPU_PPC_E500:
PMC_MDEP_INIT(e500);
pmc_class_table[n] = &e500_class_table_descr;
break;
#endif
default:
/*
* Some kind of CPU this version of the library knows nothing
* about. This shouldn't happen since the abi version check
* should have caught this.
*/
#if defined(__amd64__) || defined(__i386__) || defined(__powerpc64__)
break;
#endif
errno = ENXIO;
return (pmc_syscall = -1);
}
return (0);
}
const char *
pmc_name_of_capability(enum pmc_caps cap)
{
int i;
/*
* 'cap' should have a single bit set and should be in
* range.
*/
if ((cap & (cap - 1)) || cap < PMC_CAP_FIRST ||
cap > PMC_CAP_LAST) {
errno = EINVAL;
return (NULL);
}
i = ffs(cap);
return (pmc_capability_names[i - 1]);
}
const char *
pmc_name_of_class(enum pmc_class pc)
{
size_t n;
for (n = 0; n < PMC_TABLE_SIZE(pmc_class_names); n++)
if (pc == pmc_class_names[n].pm_class)
return (pmc_class_names[n].pm_name);
errno = EINVAL;
return (NULL);
}
const char *
pmc_name_of_cputype(enum pmc_cputype cp)
{
size_t n;
for (n = 0; n < PMC_TABLE_SIZE(pmc_cputype_names); n++)
if (cp == pmc_cputype_names[n].pm_cputype)
return (pmc_cputype_names[n].pm_name);
errno = EINVAL;
return (NULL);
}
const char *
pmc_name_of_disposition(enum pmc_disp pd)
{
if ((int) pd >= PMC_DISP_FIRST &&
pd <= PMC_DISP_LAST)
return (pmc_disposition_names[pd]);
errno = EINVAL;
return (NULL);
}
const char *
_pmc_name_of_event(enum pmc_event pe, enum pmc_cputype cpu)
{
const struct pmc_event_descr *ev, *evfence;
ev = evfence = NULL;
if (pe >= PMC_EV_K8_FIRST && pe <= PMC_EV_K8_LAST) {
ev = k8_event_table;
evfence = k8_event_table + PMC_EVENT_TABLE_SIZE(k8);
} else if (pe >= PMC_EV_ARMV7_FIRST && pe <= PMC_EV_ARMV7_LAST) {
switch (cpu) {
case PMC_CPU_ARMV7_CORTEX_A8:
ev = cortex_a8_event_table;
evfence = cortex_a8_event_table + PMC_EVENT_TABLE_SIZE(cortex_a8);
break;
case PMC_CPU_ARMV7_CORTEX_A9:
ev = cortex_a9_event_table;
evfence = cortex_a9_event_table + PMC_EVENT_TABLE_SIZE(cortex_a9);
break;
default: /* Unknown CPU type. */
break;
}
} else if (pe >= PMC_EV_ARMV8_FIRST && pe <= PMC_EV_ARMV8_LAST) {
switch (cpu) {
case PMC_CPU_ARMV8_CORTEX_A53:
ev = cortex_a53_event_table;
evfence = cortex_a53_event_table + PMC_EVENT_TABLE_SIZE(cortex_a53);
break;
case PMC_CPU_ARMV8_CORTEX_A57:
ev = cortex_a57_event_table;
evfence = cortex_a57_event_table + PMC_EVENT_TABLE_SIZE(cortex_a57);
break;
case PMC_CPU_ARMV8_CORTEX_A76:
ev = cortex_a76_event_table;
evfence = cortex_a76_event_table + PMC_EVENT_TABLE_SIZE(cortex_a76);
break;
default: /* Unknown CPU type. */
break;
}
} else if (pe >= PMC_EV_PPC7450_FIRST && pe <= PMC_EV_PPC7450_LAST) {
ev = ppc7450_event_table;
evfence = ppc7450_event_table + PMC_EVENT_TABLE_SIZE(ppc7450);
} else if (pe >= PMC_EV_PPC970_FIRST && pe <= PMC_EV_PPC970_LAST) {
ev = ppc970_event_table;
evfence = ppc970_event_table + PMC_EVENT_TABLE_SIZE(ppc970);
} else if (pe >= PMC_EV_E500_FIRST && pe <= PMC_EV_E500_LAST) {
ev = e500_event_table;
evfence = e500_event_table + PMC_EVENT_TABLE_SIZE(e500);
} else if (pe == PMC_EV_TSC_TSC) {
ev = tsc_event_table;
evfence = tsc_event_table + PMC_EVENT_TABLE_SIZE(tsc);
} else if ((int)pe >= PMC_EV_SOFT_FIRST && (int)pe <= PMC_EV_SOFT_LAST) {
ev = soft_event_table;
evfence = soft_event_table + soft_event_info.pm_nevent;
}
for (; ev != evfence; ev++)
if (pe == ev->pm_ev_code)
return (ev->pm_ev_name);
return (NULL);
}
const char *
pmc_name_of_event(enum pmc_event pe)
{
const char *n;
if ((n = _pmc_name_of_event(pe, cpu_info.pm_cputype)) != NULL)
return (n);
errno = EINVAL;
return (NULL);
}
const char *
pmc_name_of_mode(enum pmc_mode pm)
{
if ((int) pm >= PMC_MODE_FIRST &&
pm <= PMC_MODE_LAST)
return (pmc_mode_names[pm]);
errno = EINVAL;
return (NULL);
}
const char *
pmc_name_of_state(enum pmc_state ps)
{
if ((int) ps >= PMC_STATE_FIRST &&
ps <= PMC_STATE_LAST)
return (pmc_state_names[ps]);
errno = EINVAL;
return (NULL);
}
int
pmc_ncpu(void)
{
if (pmc_syscall == -1) {
errno = ENXIO;
return (-1);
}
return (cpu_info.pm_ncpu);
}
int
pmc_npmc(int cpu)
{
if (pmc_syscall == -1) {
errno = ENXIO;
return (-1);
}
if (cpu < 0 || cpu >= (int) cpu_info.pm_ncpu) {
errno = EINVAL;
return (-1);
}
return (cpu_info.pm_npmc);
}
int
pmc_pmcinfo(int cpu, struct pmc_pmcinfo **ppmci)
{
int nbytes, npmc;
struct pmc_op_getpmcinfo *pmci;
if ((npmc = pmc_npmc(cpu)) < 0)
return (-1);
nbytes = sizeof(struct pmc_op_getpmcinfo) +
npmc * sizeof(struct pmc_info);
if ((pmci = calloc(1, nbytes)) == NULL)
return (-1);
pmci->pm_cpu = cpu;
if (PMC_CALL(GETPMCINFO, pmci) < 0) {
free(pmci);
return (-1);
}
/* kernel<->library, library<->userland interfaces are identical */
*ppmci = (struct pmc_pmcinfo *) pmci;
return (0);
}
int
pmc_read(pmc_id_t pmc, pmc_value_t *value)
{
struct pmc_op_pmcrw pmc_read_op;
pmc_read_op.pm_pmcid = pmc;
pmc_read_op.pm_flags = PMC_F_OLDVALUE;
pmc_read_op.pm_value = -1;
if (PMC_CALL(PMCRW, &pmc_read_op) < 0)
return (-1);
*value = pmc_read_op.pm_value;
return (0);
}
int
pmc_release(pmc_id_t pmc)
{
struct pmc_op_simple pmc_release_args;
pmc_release_args.pm_pmcid = pmc;
return (PMC_CALL(PMCRELEASE, &pmc_release_args));
}
int
pmc_rw(pmc_id_t pmc, pmc_value_t newvalue, pmc_value_t *oldvaluep)
{
struct pmc_op_pmcrw pmc_rw_op;
pmc_rw_op.pm_pmcid = pmc;
pmc_rw_op.pm_flags = PMC_F_NEWVALUE | PMC_F_OLDVALUE;
pmc_rw_op.pm_value = newvalue;
if (PMC_CALL(PMCRW, &pmc_rw_op) < 0)
return (-1);
*oldvaluep = pmc_rw_op.pm_value;
return (0);
}
int
pmc_set(pmc_id_t pmc, pmc_value_t value)
{
struct pmc_op_pmcsetcount sc;
sc.pm_pmcid = pmc;
sc.pm_count = value;
if (PMC_CALL(PMCSETCOUNT, &sc) < 0)
return (-1);
return (0);
}
int
pmc_start(pmc_id_t pmc)
{
struct pmc_op_simple pmc_start_args;
pmc_start_args.pm_pmcid = pmc;
return (PMC_CALL(PMCSTART, &pmc_start_args));
}
int
pmc_stop(pmc_id_t pmc)
{
struct pmc_op_simple pmc_stop_args;
pmc_stop_args.pm_pmcid = pmc;
return (PMC_CALL(PMCSTOP, &pmc_stop_args));
}
int
pmc_width(pmc_id_t pmcid, uint32_t *width)
{
unsigned int i;
enum pmc_class cl;
cl = PMC_ID_TO_CLASS(pmcid);
for (i = 0; i < cpu_info.pm_nclass; i++)
if (cpu_info.pm_classes[i].pm_class == cl) {
*width = cpu_info.pm_classes[i].pm_width;
return (0);
}
errno = EINVAL;
return (-1);
}
int
pmc_write(pmc_id_t pmc, pmc_value_t value)
{
struct pmc_op_pmcrw pmc_write_op;
pmc_write_op.pm_pmcid = pmc;
pmc_write_op.pm_flags = PMC_F_NEWVALUE;
pmc_write_op.pm_value = value;
return (PMC_CALL(PMCRW, &pmc_write_op));
}
int
pmc_writelog(uint32_t userdata)
{
struct pmc_op_writelog wl;
wl.pm_userdata = userdata;
return (PMC_CALL(WRITELOG, &wl));
}
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