/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* * Niagara2 Performance Counter Backend */ #include #include #include #include #include #include #include #include #include #include #include #include #include /*LINTLIBRARY*/ static int ni2_pcbe_init(void); static uint_t ni2_pcbe_ncounters(void); static const char *ni2_pcbe_impl_name(void); static const char *ni2_pcbe_cpuref(void); static char *ni2_pcbe_list_events(uint_t picnum); static char *ni2_pcbe_list_attrs(void); static uint64_t ni2_pcbe_event_coverage(char *event); static uint64_t ni2_pcbe_overflow_bitmap(void); static int ni2_pcbe_configure(uint_t picnum, char *event, uint64_t preset, uint32_t flags, uint_t nattrs, kcpc_attr_t *attrs, void **data, void *token); static void ni2_pcbe_program(void *token); static void ni2_pcbe_allstop(void); static void ni2_pcbe_sample(void *token); static void ni2_pcbe_free(void *config); extern void ultra_setpcr(uint64_t); extern uint64_t ultra_getpcr(void); extern void ultra_setpic(uint64_t); extern uint64_t ultra_getpic(void); extern uint64_t ultra_gettick(void); extern char cpu_module_name[]; pcbe_ops_t ni2_pcbe_ops = { PCBE_VER_1, CPC_CAP_OVERFLOW_INTERRUPT | CPC_CAP_OVERFLOW_PRECISE, ni2_pcbe_ncounters, ni2_pcbe_impl_name, ni2_pcbe_cpuref, ni2_pcbe_list_events, ni2_pcbe_list_attrs, ni2_pcbe_event_coverage, ni2_pcbe_overflow_bitmap, ni2_pcbe_configure, ni2_pcbe_program, ni2_pcbe_allstop, ni2_pcbe_sample, ni2_pcbe_free }; typedef struct _ni2_pcbe_config { uint_t pcbe_picno; /* 0 for pic0 or 1 for pic1 */ uint32_t pcbe_evsel; /* %pcr event code unshifted */ uint32_t pcbe_flags; /* hpriv/user/system/priv */ uint32_t pcbe_pic; /* unshifted raw %pic value */ } ni2_pcbe_config_t; typedef struct _ni2_event { const char *name; const uint32_t emask; const uint32_t emask_valid; /* Mask of unreserved MASK bits */ } ni2_event_t; #define ULTRA_PCR_PRIVPIC (UINT64_C(1) << CPC_NIAGARA2_PCR_PRIV_SHIFT) #define EV_END {NULL, 0, 0} static const uint64_t allstopped = (ULTRA_PCR_PRIVPIC | CPC_NIAGARA2_PCR_HOLDOV0 | CPC_NIAGARA2_PCR_HOLDOV1); /* * We update this array in the program and allstop routine. The array * is checked in the sample routine to allow us to only perform the * PCR.ht bit check when counting is in progress. */ static boolean_t ni2_cpc_counting[NCPU]; static ni2_event_t ni2_events[] = { { "Idle_strands", 0x000, 0x00 }, { "Br_completed", 0x201, 0xff }, { "Br_taken", 0x202, 0xff }, { "Instr_FGU_arithmetic", 0x204, 0xff }, { "Instr_ld", 0x208, 0xff }, { "Instr_st", 0x210, 0xff }, { "Instr_sw", 0x220, 0xff }, { "Instr_other", 0x240, 0xff }, { "Atomics", 0x280, 0xff }, { "Instr_cnt", 0x2fd, 0xff }, { "IC_miss", 0x301, 0x33 }, { "DC_miss", 0x302, 0x33 }, { "L2_imiss", 0x310, 0x33 }, { "L2_dmiss_ld", 0x320, 0x33 }, { "ITLB_HWTW_ref_L2", 0x404, 0x3c }, { "DTLB_HWTW_ref_L2", 0x408, 0x3c }, { "ITLB_HWTW_miss_L2", 0x410, 0x3c }, { "DTLB_HWTW_miss_L2", 0x420, 0x3c }, { "Stream_ld_to_PCX", 0x501, 0x3f }, { "Stream_st_to_PCX", 0x502, 0x3f }, { "CPU_ld_to_PCX", 0x504, 0x3f }, { "CPU_ifetch_to_PCX", 0x508, 0x3f }, { "CPU_st_to_PCX", 0x510, 0x3f }, { "MMU_ld_to_PCX", 0x520, 0x3f }, { "DES_3DES_op", 0x601, 0x3f }, { "AES_op", 0x602, 0x3f }, { "RC4_op", 0x604, 0x3f }, { "MD5_SHA-1_SHA-256_op", 0x608, 0x3f }, { "MA_op", 0x610, 0x3f }, { "CRC_TCPIP_cksum", 0x620, 0x3f }, { "DES_3DES_busy_cycle", 0x701, 0x3f }, { "AES_busy_cycle", 0x702, 0x3f }, { "RC4_busy_cycle", 0x704, 0x3f }, { "MD5_SHA-1_SHA-256_busy_cycle", 0x708, 0x3f }, { "MA_busy_cycle", 0x710, 0x3f }, { "CRC_MPA_cksum", 0x720, 0x3f }, { "ITLB_miss", 0xb04, 0x0c }, { "DTLB_miss", 0xb08, 0x0c }, { "TLB_miss", 0xb0c, 0x0c }, EV_END }; static char *evlist; static size_t evlist_sz; static uint16_t pcr_pic0_mask; static uint16_t pcr_pic1_mask; #define CPU_REF_URL " Documentation for Sun processors can be found at: " \ "http://www.sun.com/processors/manuals" #if defined(NIAGARA2_IMPL) static const char *cpu_impl_name = "UltraSPARC T2"; static const char *cpu_pcbe_ref = "See the \"UltraSPARC T2 User's Manual\" " "for descriptions of these events." CPU_REF_URL; #elif defined(VFALLS_IMPL) static const char *cpu_impl_name = "UltraSPARC T2+"; static const char *cpu_pcbe_ref = "See the \"UltraSPARC T2+ User's Manual\" " "for descriptions of these events." CPU_REF_URL; #endif static boolean_t cpu_hsvc_available = B_TRUE; static int ni2_pcbe_init(void) { ni2_event_t *evp; int status; uint64_t cpu_hsvc_major; uint64_t cpu_hsvc_minor; #if defined(NIAGARA2_IMPL) uint64_t hsvc_cpu_group = HSVC_GROUP_NIAGARA2_CPU; uint64_t hsvc_cpu_major = NIAGARA2_HSVC_MAJOR; #elif defined(VFALLS_IMPL) uint64_t hsvc_cpu_group = HSVC_GROUP_VFALLS_CPU; uint64_t hsvc_cpu_major = VFALLS_HSVC_MAJOR; #endif pcr_pic0_mask = CPC_NIAGARA2_PCR_PIC0_MASK; pcr_pic1_mask = CPC_NIAGARA2_PCR_PIC1_MASK; /* * Validate API version for Niagara2 specific hypervisor services */ status = hsvc_version(hsvc_cpu_group, &cpu_hsvc_major, &cpu_hsvc_minor); if ((status != 0) || (cpu_hsvc_major != hsvc_cpu_major)) { cmn_err(CE_WARN, "hypervisor services not negotiated " "or unsupported major number: group: 0x%lx major: 0x%lx " "minor: 0x%lx errno: %d", hsvc_cpu_group, cpu_hsvc_major, cpu_hsvc_minor, status); cpu_hsvc_available = B_FALSE; } /* * Construct event list. * * First pass: Calculate size needed. We'll need an additional byte * for the NULL pointer during the last strcat. * * Second pass: Copy strings. */ for (evp = ni2_events; evp->name != NULL; evp++) evlist_sz += strlen(evp->name) + 1; evlist = kmem_alloc(evlist_sz + 1, KM_SLEEP); evlist[0] = '\0'; for (evp = ni2_events; evp->name != NULL; evp++) { (void) strcat(evlist, evp->name); (void) strcat(evlist, ","); } /* * Remove trailing comma. */ evlist[evlist_sz - 1] = '\0'; return (0); } static uint_t ni2_pcbe_ncounters(void) { return (2); } static const char * ni2_pcbe_impl_name(void) { return (cpu_impl_name); } static const char * ni2_pcbe_cpuref(void) { return (cpu_pcbe_ref); } static char * ni2_pcbe_list_events(uint_t picnum) { ASSERT(picnum < cpc_ncounters); return (evlist); } static char * ni2_pcbe_list_attrs(void) { if (cpu_hsvc_available == B_TRUE) #if defined(NIAGARA2_IMPL) return ("hpriv,emask"); #elif defined(VFALLS_IMPL) return ("hpriv,l2ctl,emask"); #endif else return ("emask"); } static ni2_event_t * find_event(char *name) { ni2_event_t *evp; for (evp = ni2_events; evp->name != NULL; evp++) if (strcmp(name, evp->name) == 0) return (evp); return (NULL); } /*ARGSUSED*/ static uint64_t ni2_pcbe_event_coverage(char *event) { /* * Fortunately, both pic0 and pic1 can count all events. */ return (0x3); } static uint64_t ni2_pcbe_overflow_bitmap(void) { uint64_t pcr, overflow; uint64_t pic; uint32_t pic0, pic1; boolean_t update_pic = B_FALSE; ASSERT(getpil() >= DISP_LEVEL); pcr = ultra_getpcr(); DTRACE_PROBE1(niagara2__getpcr, uint64_t, pcr); overflow = (pcr & CPC_NIAGARA2_PCR_OV0_MASK) >> CPC_NIAGARA2_PCR_OV0_SHIFT; overflow |= (pcr & CPC_NIAGARA2_PCR_OV1_MASK) >> CPC_NIAGARA2_PCR_OV1_SHIFT; pic = ultra_getpic(); pic0 = (uint32_t)(pic & PIC0_MASK); pic1 = (uint32_t)((pic >> PIC1_SHIFT) & PIC0_MASK); pcr |= (CPC_NIAGARA2_PCR_HOLDOV0 | CPC_NIAGARA2_PCR_HOLDOV1); if (overflow & 0x1) { pcr &= ~(CPC_NIAGARA2_PCR_OV0_MASK | CPC_NIAGARA2_PCR_HOLDOV0); if (PIC_IN_OV_RANGE(pic0)) { pic0 = 0; update_pic = B_TRUE; } } if (overflow & 0x2) { pcr &= ~(CPC_NIAGARA2_PCR_OV1_MASK | CPC_NIAGARA2_PCR_HOLDOV1); if (PIC_IN_OV_RANGE(pic1)) { pic1 = 0; update_pic = B_TRUE; } } if (update_pic) ultra_setpic(((uint64_t)pic1 << PIC1_SHIFT) | pic0); /* * The HV interface does not need to be used here because we are * only resetting the OV bits and do not need to set the HT bit. */ DTRACE_PROBE1(niagara2__setpcr, uint64_t, pcr); ultra_setpcr(pcr); return (overflow); } /*ARGSUSED*/ static int ni2_pcbe_configure(uint_t picnum, char *event, uint64_t preset, uint32_t flags, uint_t nattrs, kcpc_attr_t *attrs, void **data, void *token) { ni2_pcbe_config_t *cfg; ni2_pcbe_config_t *other_config; ni2_event_t *evp; int i; uint32_t evsel; #if defined(VFALLS_IMPL) uint64_t l2ctl = 0; #endif /* * If we've been handed an existing configuration, we need only preset * the counter value. */ if (*data != NULL) { cfg = *data; cfg->pcbe_pic = (uint32_t)preset; return (0); } if (picnum > 1) return (CPC_INVALID_PICNUM); if ((evp = find_event(event)) == NULL) return (CPC_INVALID_EVENT); evsel = evp->emask; for (i = 0; i < nattrs; i++) { if (strcmp(attrs[i].ka_name, "hpriv") == 0) { if (attrs[i].ka_val != 0) flags |= CPC_COUNT_HV; } else if (strcmp(attrs[i].ka_name, "emask") == 0) { if ((attrs[i].ka_val | evp->emask_valid) != evp->emask_valid) return (CPC_ATTRIBUTE_OUT_OF_RANGE); evsel |= attrs[i].ka_val; #if defined(VFALLS_IMPL) } else if (strcmp(attrs[i].ka_name, "l2ctl") == 0) { if ((attrs[i].ka_val | VFALLS_L2_CTL_MASK) != VFALLS_L2_CTL_MASK) return (CPC_ATTRIBUTE_OUT_OF_RANGE); else l2ctl = attrs[i].ka_val; #endif } else return (CPC_INVALID_ATTRIBUTE); } #if defined(VFALLS_IMPL) /* * Set PERF_CONTROL bits in L2_CONTROL_REG only when events have * SL bits equal to 3. */ if ((evsel & VFALLS_SL3_MASK) == VFALLS_SL3_MASK) { if ((hv_niagara_setperf(HV_NIAGARA_L2_CTL, l2ctl)) != 0) return (CPC_HV_NO_ACCESS); } #endif /* * Find other requests that will be programmed with this one, and ensure * the flags don't conflict. */ if (((other_config = kcpc_next_config(token, NULL, NULL)) != NULL) && (other_config->pcbe_flags != flags)) return (CPC_CONFLICTING_REQS); /* * If the hpriv attribute is present, make sure we have * access to hyperprivileged events before continuing with * this configuration. If we can set the ht bit in the PCR * successfully, we must have access to hyperprivileged * events. * * If this is a static per-CPU configuration, the CPC * driver ensures there can not be more than one for this * CPU. If this is a per-LWP configuration, the driver * ensures no static per-CPU counting is ongoing and that * the target LWP is not already being monitored. */ if (flags & CPC_COUNT_HV) { kpreempt_disable(); DTRACE_PROBE1(niagara2__setpcr, uint64_t, allstopped | CPC_NIAGARA2_PCR_HT); if (hv_niagara_setperf(HV_NIAGARA_SPARC_CTL, allstopped | CPC_NIAGARA2_PCR_HT) != H_EOK) { kpreempt_enable(); return (CPC_HV_NO_ACCESS); } DTRACE_PROBE1(niagara2__setpcr, uint64_t, allstopped); (void) hv_niagara_setperf(HV_NIAGARA_SPARC_CTL, allstopped); kpreempt_enable(); } cfg = kmem_alloc(sizeof (*cfg), KM_SLEEP); cfg->pcbe_picno = picnum; cfg->pcbe_evsel = evsel; cfg->pcbe_flags = flags; cfg->pcbe_pic = (uint32_t)preset; *data = cfg; return (0); } static void ni2_pcbe_program(void *token) { ni2_pcbe_config_t *pic0; ni2_pcbe_config_t *pic1; ni2_pcbe_config_t *tmp; ni2_pcbe_config_t nullcfg = { 1, 0, 0, 0 }; uint64_t pcr; uint64_t curpic; uint64_t toe; /* enable trap-on-event for pic0 and pic1 */ toe = (CPC_NIAGARA2_PCR_TOE0 | CPC_NIAGARA2_PCR_TOE1); if ((pic0 = (ni2_pcbe_config_t *)kcpc_next_config(token, NULL, NULL)) == NULL) panic("ni2_pcbe: token %p has no configs", token); if ((pic1 = kcpc_next_config(token, pic0, NULL)) == NULL) { pic1 = &nullcfg; nullcfg.pcbe_flags = pic0->pcbe_flags; toe = CPC_NIAGARA2_PCR_TOE0; /* enable trap-on-event for pic0 */ } if (pic0->pcbe_picno != 0) { /* * pic0 is counter 1, so if we need the null config it should * be counter 0. */ nullcfg.pcbe_picno = 0; tmp = pic0; pic0 = pic1; pic1 = tmp; toe = CPC_NIAGARA2_PCR_TOE1; /* enable trap-on-event for pic1 */ } if (pic0->pcbe_picno != 0 || pic1->pcbe_picno != 1) panic("%s: bad config on token %p\n", cpu_impl_name, token); /* * UltraSPARC does not allow pic0 to be configured differently * from pic1. If the flags on these two configurations are * different, they are incompatible. This condition should be * caught at configure time. */ ASSERT(pic0->pcbe_flags == pic1->pcbe_flags); ni2_pcbe_allstop(); ultra_setpic(((uint64_t)pic1->pcbe_pic << PIC1_SHIFT) | (uint64_t)pic0->pcbe_pic); pcr = (pic0->pcbe_evsel & pcr_pic0_mask) << CPC_NIAGARA2_PCR_PIC0_SHIFT; pcr |= (pic1->pcbe_evsel & pcr_pic1_mask) << CPC_NIAGARA2_PCR_PIC1_SHIFT; if (pic0->pcbe_flags & CPC_COUNT_USER) pcr |= (1ull << CPC_NIAGARA2_PCR_UT_SHIFT); if (pic0->pcbe_flags & CPC_COUNT_SYSTEM) pcr |= (1ull << CPC_NIAGARA2_PCR_ST_SHIFT); if (pic0->pcbe_flags & CPC_COUNT_HV) pcr |= (1ull << CPC_NIAGARA2_PCR_HT_SHIFT); pcr |= toe; DTRACE_PROBE1(niagara2__setpcr, uint64_t, pcr); if (pic0->pcbe_flags & CPC_COUNT_HV) { /* * The ht bit in the PCR is only writable in * hyperprivileged mode. So if we are counting * hpriv events, we must use the HV interface * hv_niagara_setperf to set the PCR. If this * fails, assume we no longer have access to * hpriv events. */ if (hv_niagara_setperf(HV_NIAGARA_SPARC_CTL, pcr) != H_EOK) { kcpc_invalidate_config(token); return; } } else /* Set the PCR with no hpriv event counting enabled. */ ultra_setpcr(pcr); ni2_cpc_counting[CPU->cpu_id] = B_TRUE; /* * On UltraSPARC, only read-to-read counts are accurate. We cannot * expect the value we wrote into the PIC, above, to be there after * starting the counter. We must sample the counter value now and use * that as the baseline for future samples. */ curpic = ultra_getpic(); pic0->pcbe_pic = (uint32_t)(curpic & PIC0_MASK); pic1->pcbe_pic = (uint32_t)(curpic >> PIC1_SHIFT); DTRACE_PROBE1(niagara2__newpic, uint64_t, curpic); } static void ni2_pcbe_allstop(void) { /* * We use the HV interface here because if we were counting * hyperprivileged events, we must reset the PCR.ht bit to stop * the counting. In the event that this HV call fails, we fall * back on ultra_setpcr which does not have write access to the * ht bit. */ if (hv_niagara_setperf(HV_NIAGARA_SPARC_CTL, allstopped) != H_EOK) ultra_setpcr(allstopped); ni2_cpc_counting[CPU->cpu_id] = B_FALSE; } static void ni2_pcbe_sample(void *token) { uint64_t curpic; int64_t diff; uint64_t *pic0_data; uint64_t *pic1_data; uint64_t *dtmp; uint64_t tmp; uint64_t pcr; ni2_pcbe_config_t *pic0; ni2_pcbe_config_t *pic1; ni2_pcbe_config_t nullcfg = { 1, 0, 0, 0 }; ni2_pcbe_config_t *ctmp; curpic = ultra_getpic(); DTRACE_PROBE1(niagara2__getpic, uint64_t, curpic); if ((pic0 = kcpc_next_config(token, NULL, &pic0_data)) == NULL) panic("%s: token %p has no configs", cpu_impl_name, token); if ((pic1 = kcpc_next_config(token, pic0, &pic1_data)) == NULL) { pic1 = &nullcfg; pic1_data = &tmp; } if (pic0->pcbe_picno != 0) { nullcfg.pcbe_picno = 0; ctmp = pic0; pic0 = pic1; pic1 = ctmp; dtmp = pic0_data; pic0_data = pic1_data; pic1_data = dtmp; } if (pic0->pcbe_picno != 0 || pic1->pcbe_picno != 1) panic("%s: bad config on token %p\n", cpu_impl_name, token); if (pic0->pcbe_flags & CPC_COUNT_HV) { /* * If the hpriv attribute is present, but the HT bit * is not set in the PCR, access to hyperprivileged * events must have been revoked. Only perform this * check if counting is not stopped. */ pcr = ultra_getpcr(); DTRACE_PROBE1(niagara2__getpcr, uint64_t, pcr); if (ni2_cpc_counting[CPU->cpu_id] && !(pcr & CPC_NIAGARA2_PCR_HT)) { kcpc_invalidate_config(token); return; } } diff = (curpic & PIC0_MASK) - (uint64_t)pic0->pcbe_pic; if (diff < 0) diff += (1ll << 32); *pic0_data += diff; diff = (curpic >> 32) - (uint64_t)pic1->pcbe_pic; if (diff < 0) diff += (1ll << 32); *pic1_data += diff; pic0->pcbe_pic = (uint32_t)(curpic & PIC0_MASK); pic1->pcbe_pic = (uint32_t)(curpic >> PIC1_SHIFT); } static void ni2_pcbe_free(void *config) { kmem_free(config, sizeof (ni2_pcbe_config_t)); } static struct modlpcbe modlpcbe = { &mod_pcbeops, #if defined(NIAGARA2_IMPL) "UltraSPARC T2 Performance Counters", #elif defined(VFALLS_IMPL) "UltraSPARC T2+ Performance Counters", #endif &ni2_pcbe_ops }; static struct modlinkage modl = { MODREV_1, &modlpcbe, }; int _init(void) { if (ni2_pcbe_init() != 0) return (ENOTSUP); return (mod_install(&modl)); } int _fini(void) { return (mod_remove(&modl)); } int _info(struct modinfo *mi) { return (mod_info(&modl, mi)); }