2 * Copyright (c) 2012 Fabien Thomas
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
32 #include <sys/pmckern.h>
33 #include <sys/systm.h>
34 #include <sys/mutex.h>
36 #include <machine/cpu.h>
37 #include <machine/cpufunc.h>
39 #include "hwpmc_soft.h"
42 * Software PMC support.
45 #define SOFT_CAPS (PMC_CAP_READ | PMC_CAP_WRITE | PMC_CAP_INTERRUPT | \
46 PMC_CAP_USER | PMC_CAP_SYSTEM)
49 struct pmc_descr pm_descr; /* "base class" */
52 static struct soft_descr soft_pmcdesc[SOFT_NPMCS] =
54 #define SOFT_PMCDESCR(N) \
59 .pd_class = PMC_CLASS_SOFT, \
60 .pd_caps = SOFT_CAPS, \
75 SOFT_PMCDESCR(SOFT10),
76 SOFT_PMCDESCR(SOFT11),
77 SOFT_PMCDESCR(SOFT12),
78 SOFT_PMCDESCR(SOFT13),
79 SOFT_PMCDESCR(SOFT14),
84 * Per-CPU data structure.
88 struct pmc_hw soft_hw[SOFT_NPMCS];
89 pmc_value_t soft_values[SOFT_NPMCS];
93 static struct soft_cpu **soft_pcpu;
96 soft_allocate_pmc(int cpu, int ri, struct pmc *pm,
97 const struct pmc_op_pmcallocate *a)
104 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
105 ("[soft,%d] illegal CPU value %d", __LINE__, cpu));
106 KASSERT(ri >= 0 && ri < SOFT_NPMCS,
107 ("[soft,%d] illegal row-index %d", __LINE__, ri));
109 if (a->pm_class != PMC_CLASS_SOFT)
112 if ((pm->pm_caps & SOFT_CAPS) == 0)
115 if ((pm->pm_caps & ~SOFT_CAPS) != 0)
119 if (ev < PMC_EV_SOFT_FIRST || ev > PMC_EV_SOFT_LAST)
122 /* Check if event is registered. */
123 ps = pmc_soft_ev_acquire(ev);
126 pmc_soft_ev_release(ps);
127 /* Module unload is protected by pmc SX lock. */
128 if (ps->ps_alloc != NULL)
135 soft_config_pmc(int cpu, int ri, struct pmc *pm)
139 PMCDBG(MDP,CFG,1, "cpu=%d ri=%d pm=%p", cpu, ri, pm);
141 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
142 ("[soft,%d] illegal CPU value %d", __LINE__, cpu));
143 KASSERT(ri >= 0 && ri < SOFT_NPMCS,
144 ("[soft,%d] illegal row-index %d", __LINE__, ri));
146 phw = &soft_pcpu[cpu]->soft_hw[ri];
148 KASSERT(pm == NULL || phw->phw_pmc == NULL,
149 ("[soft,%d] pm=%p phw->pm=%p hwpmc not unconfigured", __LINE__,
158 soft_describe(int cpu, int ri, struct pmc_info *pi, struct pmc **ppmc)
162 const struct soft_descr *pd;
165 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
166 ("[soft,%d] illegal CPU %d", __LINE__, cpu));
167 KASSERT(ri >= 0 && ri < SOFT_NPMCS,
168 ("[soft,%d] illegal row-index %d", __LINE__, ri));
170 phw = &soft_pcpu[cpu]->soft_hw[ri];
171 pd = &soft_pmcdesc[ri];
173 if ((error = copystr(pd->pm_descr.pd_name, pi->pm_name,
174 PMC_NAME_MAX, &copied)) != 0)
177 pi->pm_class = pd->pm_descr.pd_class;
179 if (phw->phw_state & PMC_PHW_FLAG_IS_ENABLED) {
180 pi->pm_enabled = TRUE;
181 *ppmc = phw->phw_pmc;
183 pi->pm_enabled = FALSE;
191 soft_get_config(int cpu, int ri, struct pmc **ppm)
195 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
196 ("[soft,%d] illegal CPU %d", __LINE__, cpu));
197 KASSERT(ri >= 0 && ri < SOFT_NPMCS,
198 ("[soft,%d] illegal row-index %d", __LINE__, ri));
200 *ppm = soft_pcpu[cpu]->soft_hw[ri].phw_pmc;
205 soft_pcpu_fini(struct pmc_mdep *md, int cpu)
210 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
211 ("[soft,%d] illegal cpu %d", __LINE__, cpu));
212 KASSERT(soft_pcpu[cpu] != NULL, ("[soft,%d] null pcpu", __LINE__));
214 free(soft_pcpu[cpu], M_PMC);
215 soft_pcpu[cpu] = NULL;
217 ri = md->pmd_classdep[PMC_CLASS_INDEX_SOFT].pcd_ri;
219 KASSERT(ri >= 0 && ri < SOFT_NPMCS,
220 ("[soft,%d] ri=%d", __LINE__, ri));
223 pc->pc_hwpmcs[ri] = NULL;
229 soft_pcpu_init(struct pmc_mdep *md, int cpu)
233 struct soft_cpu *soft_pc;
237 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
238 ("[soft,%d] illegal cpu %d", __LINE__, cpu));
239 KASSERT(soft_pcpu, ("[soft,%d] null pcpu", __LINE__));
240 KASSERT(soft_pcpu[cpu] == NULL, ("[soft,%d] non-null per-cpu",
243 soft_pc = malloc(sizeof(struct soft_cpu), M_PMC, M_WAITOK|M_ZERO);
249 KASSERT(pc != NULL, ("[soft,%d] cpu %d null per-cpu", __LINE__, cpu));
251 soft_pcpu[cpu] = soft_pc;
252 phw = soft_pc->soft_hw;
253 first_ri = md->pmd_classdep[PMC_CLASS_INDEX_SOFT].pcd_ri;
255 for (n = 0; n < SOFT_NPMCS; n++, phw++) {
256 phw->phw_state = PMC_PHW_FLAG_IS_ENABLED |
257 PMC_PHW_CPU_TO_STATE(cpu) | PMC_PHW_INDEX_TO_STATE(n);
259 pc->pc_hwpmcs[n + first_ri] = phw;
266 soft_read_pmc(int cpu, int ri, pmc_value_t *v)
269 const struct pmc_hw *phw;
271 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
272 ("[soft,%d] illegal CPU value %d", __LINE__, cpu));
273 KASSERT(ri >= 0 && ri < SOFT_NPMCS,
274 ("[soft,%d] illegal row-index %d", __LINE__, ri));
276 phw = &soft_pcpu[cpu]->soft_hw[ri];
280 ("[soft,%d] no owner for PHW [cpu%d,pmc%d]", __LINE__, cpu, ri));
282 PMCDBG(MDP,REA,1,"soft-read id=%d", ri);
284 *v = soft_pcpu[cpu]->soft_values[ri];
290 soft_write_pmc(int cpu, int ri, pmc_value_t v)
293 const struct soft_descr *pd;
295 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
296 ("[soft,%d] illegal cpu value %d", __LINE__, cpu));
297 KASSERT(ri >= 0 && ri < SOFT_NPMCS,
298 ("[soft,%d] illegal row-index %d", __LINE__, ri));
300 pm = soft_pcpu[cpu]->soft_hw[ri].phw_pmc;
301 pd = &soft_pmcdesc[ri];
304 ("[soft,%d] cpu %d ri %d pmc not configured", __LINE__, cpu, ri));
306 PMCDBG(MDP,WRI,1, "soft-write cpu=%d ri=%d v=%jx", cpu, ri, v);
308 soft_pcpu[cpu]->soft_values[ri] = v;
314 soft_release_pmc(int cpu, int ri, struct pmc *pmc)
322 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
323 ("[soft,%d] illegal CPU value %d", __LINE__, cpu));
324 KASSERT(ri >= 0 && ri < SOFT_NPMCS,
325 ("[soft,%d] illegal row-index %d", __LINE__, ri));
327 phw = &soft_pcpu[cpu]->soft_hw[ri];
329 KASSERT(phw->phw_pmc == NULL,
330 ("[soft,%d] PHW pmc %p non-NULL", __LINE__, phw->phw_pmc));
334 /* Check if event is registered. */
335 ps = pmc_soft_ev_acquire(ev);
337 ("[soft,%d] unregistered event %d", __LINE__, ev));
338 pmc_soft_ev_release(ps);
339 /* Module unload is protected by pmc SX lock. */
340 if (ps->ps_release != NULL)
346 soft_start_pmc(int cpu, int ri)
352 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
353 ("[soft,%d] illegal CPU value %d", __LINE__, cpu));
354 KASSERT(ri >= 0 && ri < SOFT_NPMCS,
355 ("[soft,%d] illegal row-index %d", __LINE__, ri));
358 pm = pc->soft_hw[ri].phw_pmc;
361 ("[soft,%d] cpu %d ri %d pmc not configured", __LINE__, cpu, ri));
363 ps = pmc_soft_ev_acquire(pm->pm_event);
366 atomic_add_int(&ps->ps_running, 1);
367 pmc_soft_ev_release(ps);
373 soft_stop_pmc(int cpu, int ri)
379 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
380 ("[soft,%d] illegal CPU value %d", __LINE__, cpu));
381 KASSERT(ri >= 0 && ri < SOFT_NPMCS,
382 ("[soft,%d] illegal row-index %d", __LINE__, ri));
385 pm = pc->soft_hw[ri].phw_pmc;
388 ("[soft,%d] cpu %d ri %d pmc not configured", __LINE__, cpu, ri));
390 ps = pmc_soft_ev_acquire(pm->pm_event);
391 /* event unregistered ? */
393 atomic_subtract_int(&ps->ps_running, 1);
394 pmc_soft_ev_release(ps);
401 pmc_soft_intr(struct pmckern_soft *ks)
405 int ri, processed, error, user_mode;
407 KASSERT(ks->pm_cpu >= 0 && ks->pm_cpu < pmc_cpu_max(),
408 ("[soft,%d] CPU %d out of range", __LINE__, ks->pm_cpu));
411 pc = soft_pcpu[ks->pm_cpu];
413 for (ri = 0; ri < SOFT_NPMCS; ri++) {
415 pm = pc->soft_hw[ri].phw_pmc;
417 pm->pm_state != PMC_STATE_RUNNING ||
418 pm->pm_event != ks->pm_ev) {
423 pc->soft_values[ri]++;
424 if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm))) {
425 user_mode = TRAPF_USERMODE(ks->pm_tf);
426 error = pmc_process_interrupt(ks->pm_cpu, PMC_SR, pm,
427 ks->pm_tf, user_mode);
429 soft_stop_pmc(ks->pm_cpu, ri);
434 /* If in user mode setup AST to process
435 * callchain out of interrupt context.
437 curthread->td_flags |= TDF_ASTPENDING;
442 atomic_add_int(processed ? &pmc_stats.pm_intr_processed :
443 &pmc_stats.pm_intr_ignored, 1);
449 pmc_soft_initialize(struct pmc_mdep *md)
451 struct pmc_classdep *pcd;
454 soft_pcpu = malloc(sizeof(struct soft_cpu *) * pmc_cpu_max(), M_PMC,
457 pcd = &md->pmd_classdep[PMC_CLASS_INDEX_SOFT];
459 pcd->pcd_caps = SOFT_CAPS;
460 pcd->pcd_class = PMC_CLASS_SOFT;
461 pcd->pcd_num = SOFT_NPMCS;
462 pcd->pcd_ri = md->pmd_npmc;
465 pcd->pcd_allocate_pmc = soft_allocate_pmc;
466 pcd->pcd_config_pmc = soft_config_pmc;
467 pcd->pcd_describe = soft_describe;
468 pcd->pcd_get_config = soft_get_config;
469 pcd->pcd_get_msr = NULL;
470 pcd->pcd_pcpu_init = soft_pcpu_init;
471 pcd->pcd_pcpu_fini = soft_pcpu_fini;
472 pcd->pcd_read_pmc = soft_read_pmc;
473 pcd->pcd_write_pmc = soft_write_pmc;
474 pcd->pcd_release_pmc = soft_release_pmc;
475 pcd->pcd_start_pmc = soft_start_pmc;
476 pcd->pcd_stop_pmc = soft_stop_pmc;
478 md->pmd_npmc += SOFT_NPMCS;
482 pmc_soft_finalize(struct pmc_mdep *md)
487 ncpus = pmc_cpu_max();
488 for (i = 0; i < ncpus; i++)
489 KASSERT(soft_pcpu[i] == NULL, ("[soft,%d] non-null pcpu cpu %d",
492 KASSERT(md->pmd_classdep[PMC_CLASS_INDEX_SOFT].pcd_class ==
493 PMC_CLASS_SOFT, ("[soft,%d] class mismatch", __LINE__));
495 free(soft_pcpu, M_PMC);