/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (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 2005 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" /* * Performance Counter Back-End for AMD Opteron and AMD Athlon 64 processors. */ #include #include #include #include #include #include #include #include #include #include #include #include static int opt_pcbe_init(void); static uint_t opt_pcbe_ncounters(void); static const char *opt_pcbe_impl_name(void); static const char *opt_pcbe_cpuref(void); static char *opt_pcbe_list_events(uint_t picnum); static char *opt_pcbe_list_attrs(void); static uint64_t opt_pcbe_event_coverage(char *event); static uint64_t opt_pcbe_overflow_bitmap(void); static int opt_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 opt_pcbe_program(void *token); static void opt_pcbe_allstop(void); static void opt_pcbe_sample(void *token); static void opt_pcbe_free(void *config); static pcbe_ops_t opt_pcbe_ops = { PCBE_VER_1, CPC_CAP_OVERFLOW_INTERRUPT, opt_pcbe_ncounters, opt_pcbe_impl_name, opt_pcbe_cpuref, opt_pcbe_list_events, opt_pcbe_list_attrs, opt_pcbe_event_coverage, opt_pcbe_overflow_bitmap, opt_pcbe_configure, opt_pcbe_program, opt_pcbe_allstop, opt_pcbe_sample, opt_pcbe_free }; /* * Define offsets and masks for the fields in the Performance * Event-Select (PES) registers. */ #define OPT_PES_CMASK_SHIFT 24 #define OPT_PES_CMASK_MASK 0xFF #define OPT_PES_INV_SHIFT 23 #define OPT_PES_ENABLE_SHIFT 22 #define OPT_PES_INT_SHIFT 20 #define OPT_PES_PC_SHIFT 19 #define OPT_PES_EDGE_SHIFT 18 #define OPT_PES_OS_SHIFT 17 #define OPT_PES_USR_SHIFT 16 #define OPT_PES_UMASK_SHIFT 8 #define OPT_PES_UMASK_MASK 0xFF #define OPT_PES_INV (1 << OPT_PES_INV_SHIFT) #define OPT_PES_ENABLE (1 << OPT_PES_ENABLE_SHIFT) #define OPT_PES_INT (1 << OPT_PES_INT_SHIFT) #define OPT_PES_PC (1 << OPT_PES_PC_SHIFT) #define OPT_PES_EDGE (1 << OPT_PES_EDGE_SHIFT) #define OPT_PES_OS (1 << OPT_PES_OS_SHIFT) #define OPT_PES_USR (1 << OPT_PES_USR_SHIFT) typedef struct _opt_pcbe_config { uint8_t opt_picno; /* Counter number: 0, 1, 2, or 3 */ uint64_t opt_evsel; /* Event Selection register */ uint64_t opt_rawpic; /* Raw counter value */ } opt_pcbe_config_t; opt_pcbe_config_t nullcfgs[4] = { { 0, 0, 0 }, { 1, 0, 0 }, { 2, 0, 0 }, { 3, 0, 0 } }; typedef struct _opt_event { char *name; uint8_t emask; /* Event mask setting */ uint8_t umask_valid; /* Mask of unreserved UNIT_MASK bits */ } opt_event_t; /* * Base MSR addresses for the PerfEvtSel registers and the counters themselves. * Add counter number to base address to get corresponding MSR address. */ #define PES_BASE_ADDR 0xC0010000 #define PIC_BASE_ADDR 0xC0010004 #define MASK48 0xFFFFFFFFFFFF #define EV_END {NULL, 0, 0} static opt_event_t opt_events[] = { { "FP_dispatched_fpu_ops", 0x0, 0x1F }, { "FP_cycles_no_fpu_ops_retired", 0x1, 0x0 }, { "FP_dispatched_fpu_ops_ff", 0x2, 0x0 }, { "LS_seg_reg_load", 0x20, 0x7F }, { "LS_uarch_resync_self_modify", 0x21, 0x0 }, { "LS_uarch_resync_snoop", 0x22, 0x0 }, { "LS_buffer_2_full", 0x23, 0x0 }, { "LS_locked_operation", 0x24, 0x7 }, { "LS_uarch_late_cancel_op", 0x25, 0x0 }, { "LS_retired_cflush", 0x26, 0x0 }, { "LS_retired_cpuid", 0x27, 0x0 }, { "DC_access", 0x40, 0x0 }, { "DC_miss", 0x41, 0x0 }, { "DC_refill_from_L2", 0x42, 0x1F }, { "DC_refill_from_system", 0x43, 0x1F }, { "DC_copyback", 0x44, 0x1F }, { "DC_dtlb_L1_miss_L2_hit", 0x45, 0x0 }, { "DC_dtlb_L1_miss_L2_miss", 0x46, 0x0 }, { "DC_misaligned_data_ref", 0x47, 0x0 }, { "DC_uarch_late_cancel_access", 0x48, 0x0 }, { "DC_uarch_early_cancel_access", 0x49, 0x0 }, { "DC_1bit_ecc_error_found", 0x4A, 0x3 }, { "DC_dispatched_prefetch_instr", 0x4B, 0x7 }, { "DC_dcache_accesses_by_locks", 0x4C, 0x3 }, { "BU_cpu_clk_unhalted", 0x76, 0x0 }, { "BU_internal_L2_req", 0x7D, 0x1F }, { "BU_fill_req_missed_L2", 0x7E, 0x7 }, { "BU_fill_into_L2", 0x7F, 0x3 }, { "IC_fetch", 0x80, 0x0 }, { "IC_miss", 0x81, 0x0 }, { "IC_refill_from_L2", 0x82, 0x0 }, { "IC_refill_from_system", 0x83, 0x0 }, { "IC_itlb_L1_miss_L2_hit", 0x84, 0x0 }, { "IC_itlb_L1_miss_L2_miss", 0x85, 0x0 }, { "IC_uarch_resync_snoop", 0x86, 0x0 }, { "IC_instr_fetch_stall", 0x87, 0x0 }, { "IC_return_stack_hit", 0x88, 0x0 }, { "IC_return_stack_overflow", 0x89, 0x0 }, { "FR_retired_x86_instr_w_excp_intr", 0xC0, 0x0 }, { "FR_retired_uops", 0xC1, 0x0 }, { "FR_retired_branches_w_excp_intr", 0xC2, 0x0 }, { "FR_retired_branches_mispred", 0xC3, 0x0 }, { "FR_retired_taken_branches", 0xC4, 0x0 }, { "FR_retired_taken_branches_mispred", 0xC5, 0x0 }, { "FR_retired_far_ctl_transfer", 0xC6, 0x0 }, { "FR_retired_resyncs", 0xC7, 0x0 }, { "FR_retired_near_rets", 0xC8, 0x0 }, { "FR_retired_near_rets_mispred", 0xC9, 0x0 }, { "FR_retired_taken_branches_mispred_addr_miscomp", 0xCA, 0x0 }, { "FR_retired_fpu_instr", 0xCB, 0xF }, { "FR_retired_fastpath_double_op_instr", 0xCC, 0x7 }, { "FR_intr_masked_cycles", 0xCD, 0x0 }, { "FR_intr_masked_while_pending_cycles", 0xCE, 0x0 }, { "FR_taken_hardware_intrs", 0xCF, 0x0 }, { "FR_nothing_to_dispatch", 0xD0, 0x0 }, { "FR_dispatch_stalls", 0xD1, 0x0 }, { "FR_dispatch_stall_branch_abort_to_retire", 0xD2, 0x0 }, { "FR_dispatch_stall_serialization", 0xD3, 0x0 }, { "FR_dispatch_stall_segment_load", 0xD4, 0x0 }, { "FR_dispatch_stall_reorder_buffer_full", 0xD5, 0x0 }, { "FR_dispatch_stall_resv_stations_full", 0xD6, 0x0 }, { "FR_dispatch_stall_fpu_full", 0xD7, 0x0 }, { "FR_dispatch_stall_ls_full", 0xD8, 0x0 }, { "FR_dispatch_stall_waiting_all_quiet", 0xD9, 0x0 }, { "FR_dispatch_stall_far_ctl_trsfr_resync_branch_pend", 0xDA, 0x0 }, { "FR_fpu_exception", 0xDB, 0xF }, { "FR_num_brkpts_dr0", 0xDC, 0x0 }, { "FR_num_brkpts_dr1", 0xDD, 0x0 }, { "FR_num_brkpts_dr2", 0xDE, 0x0 }, { "FR_num_brkpts_dr3", 0xDF, 0x0 }, { "NB_mem_ctrlr_page_access", 0xE0, 0x7 }, { "NB_mem_ctrlr_page_table_overflow", 0xE1, 0x0 }, { "NB_mem_ctrlr_dram_cmd_slots_missed", 0xE2, 0x0 }, { "NB_mem_ctrlr_turnaround", 0xE3, 0x7 }, { "NB_mem_ctrlr_bypass_counter_saturation", 0xE4, 0xF }, { "NB_sized_commands", 0xEB, 0x7F }, { "NB_probe_result", 0xEC, 0xF }, { "NB_ht_bus0_bandwidth", 0xF6, 0xF }, { "NB_ht_bus1_bandwidth", 0xF7, 0xF }, { "NB_ht_bus2_bandwidth", 0xF8, 0xF }, EV_END }; static char *evlist; static size_t evlist_sz; #define BITS(v, u, l) \ (((v) >> (l)) & ((1 << (1 + (u) - (l))) - 1)) #define OPTERON_FAMILY 15 static int opt_pcbe_init(void) { opt_event_t *evp; /* * Make sure this really _is_ an Opteron or Athlon 64 system. The kernel * loads this module based on its name in the module directory, but it * could have been renamed. */ if (cpuid_getvendor(CPU) != X86_VENDOR_AMD || cpuid_getfamily(CPU) != OPTERON_FAMILY) return (-1); /* * 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 = opt_events; evp->name != NULL; evp++) evlist_sz += strlen(evp->name) + 1; evlist = kmem_alloc(evlist_sz + 1, KM_SLEEP); evlist[0] = '\0'; for (evp = opt_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 opt_pcbe_ncounters(void) { return (4); } static const char * opt_pcbe_impl_name(void) { return ("AMD Opteron & Athlon64"); } static const char * opt_pcbe_cpuref(void) { return ("See Chapter 10 of the \"BIOS and Kernel Developer's Guide " "for the AMD Athlon 64 and AMD Opteron Processors,\" " "AMD publication #26094"); } /*ARGSUSED*/ static char * opt_pcbe_list_events(uint_t picnum) { return (evlist); } static char * opt_pcbe_list_attrs(void) { return ("edge,pc,inv,cmask,umask"); } /*ARGSUSED*/ static uint64_t opt_pcbe_event_coverage(char *event) { /* * Fortunately, all counters can count all events. */ return (0xF); } static uint64_t opt_pcbe_overflow_bitmap(void) { /* * Unfortunately, this chip cannot detect which counter overflowed, so * we must act as if they all did. */ return (0xF); } static opt_event_t * find_event(char *name) { opt_event_t *evp; for (evp = opt_events; evp->name != NULL; evp++) if (strcmp(name, evp->name) == 0) return (evp); return (NULL); } /*ARGSUSED*/ static int opt_pcbe_configure(uint_t picnum, char *event, uint64_t preset, uint32_t flags, uint_t nattrs, kcpc_attr_t *attrs, void **data, void *token) { opt_pcbe_config_t *cfg; opt_event_t *evp; int i; uint32_t evsel = 0; /* * If we've been handed an existing configuration, we need only preset * the counter value. */ if (*data != NULL) { cfg = *data; cfg->opt_rawpic = preset & MASK48; return (0); } if (picnum >= 4) return (CPC_INVALID_PICNUM); if ((evp = find_event(event)) == NULL) return (CPC_INVALID_EVENT); evsel |= evp->emask; if (flags & CPC_COUNT_USER) evsel |= OPT_PES_USR; if (flags & CPC_COUNT_SYSTEM) evsel |= OPT_PES_OS; if (flags & CPC_OVF_NOTIFY_EMT) evsel |= OPT_PES_INT; for (i = 0; i < nattrs; i++) { if (strcmp(attrs[i].ka_name, "edge") == 0) { if (attrs[i].ka_val != 0) evsel |= OPT_PES_EDGE; } else if (strcmp(attrs[i].ka_name, "pc") == 0) { if (attrs[i].ka_val != 0) evsel |= OPT_PES_PC; } else if (strcmp(attrs[i].ka_name, "inv") == 0) { if (attrs[i].ka_val != 0) evsel |= OPT_PES_INV; } else if (strcmp(attrs[i].ka_name, "cmask") == 0) { if ((attrs[i].ka_val | OPT_PES_CMASK_MASK) != OPT_PES_CMASK_MASK) return (CPC_ATTRIBUTE_OUT_OF_RANGE); evsel |= attrs[i].ka_val << OPT_PES_CMASK_SHIFT; } else if (strcmp(attrs[i].ka_name, "umask") == 0) { if ((attrs[i].ka_val | evp->umask_valid) != evp->umask_valid) return (CPC_ATTRIBUTE_OUT_OF_RANGE); evsel |= attrs[i].ka_val << OPT_PES_UMASK_SHIFT; } else return (CPC_INVALID_ATTRIBUTE); } cfg = kmem_alloc(sizeof (*cfg), KM_SLEEP); cfg->opt_picno = picnum; cfg->opt_evsel = evsel; cfg->opt_rawpic = preset & MASK48; *data = cfg; return (0); } static void opt_pcbe_program(void *token) { opt_pcbe_config_t *cfgs[4] = { &nullcfgs[0], &nullcfgs[1], &nullcfgs[2], &nullcfgs[3] }; opt_pcbe_config_t *pcfg = NULL; int i; uint32_t curcr4 = getcr4(); /* * Allow nonprivileged code to read the performance counters if desired. */ if (kcpc_allow_nonpriv(token)) setcr4(curcr4 | CR4_PCE); else setcr4(curcr4 & ~CR4_PCE); /* * Query kernel for all configs which will be co-programmed. */ do { pcfg = (opt_pcbe_config_t *)kcpc_next_config(token, pcfg, NULL); if (pcfg != NULL) { ASSERT(pcfg->opt_picno < 4); cfgs[pcfg->opt_picno] = pcfg; } } while (pcfg != NULL); /* * Program in two loops. The first configures and presets the counter, * and the second loop enables the counters. This ensures that the * counters are all enabled as closely together in time as possible. */ for (i = 0; i < 4; i++) { wrmsr(PES_BASE_ADDR + i, cfgs[i]->opt_evsel); wrmsr(PIC_BASE_ADDR + i, cfgs[i]->opt_rawpic); } for (i = 0; i < 4; i++) { wrmsr(PES_BASE_ADDR + i, cfgs[i]->opt_evsel | (uint64_t)(uintptr_t)OPT_PES_ENABLE); } } static void opt_pcbe_allstop(void) { int i; for (i = 0; i < 4; i++) wrmsr(PES_BASE_ADDR + i, 0ULL); /* * Disable non-privileged access to the counter registers. */ setcr4((uint32_t)getcr4() & ~CR4_PCE); } static void opt_pcbe_sample(void *token) { opt_pcbe_config_t *cfgs[4] = { NULL, NULL, NULL, NULL }; opt_pcbe_config_t *pcfg = NULL; int i; uint64_t curpic[4]; uint64_t *addrs[4]; uint64_t *tmp; int64_t diff; for (i = 0; i < 4; i++) curpic[i] = rdmsr(PIC_BASE_ADDR); /* * Query kernel for all configs which are co-programmed. */ do { pcfg = (opt_pcbe_config_t *)kcpc_next_config(token, pcfg, &tmp); if (pcfg != NULL) { ASSERT(pcfg->opt_picno < 4); cfgs[pcfg->opt_picno] = pcfg; addrs[pcfg->opt_picno] = tmp; } } while (pcfg != NULL); for (i = 0; i < 4; i++) { if (cfgs[i] == NULL) continue; diff = (curpic[i] - cfgs[i]->opt_rawpic) & MASK48; *addrs[i] += diff; DTRACE_PROBE4(opt__pcbe__sample, int, i, uint64_t, *addrs[i], uint64_t, curpic[i], uint64_t, cfgs[i]->opt_rawpic); cfgs[i]->opt_rawpic = *addrs[i] & MASK48; } } static void opt_pcbe_free(void *config) { kmem_free(config, sizeof (opt_pcbe_config_t)); } static struct modlpcbe modlpcbe = { &mod_pcbeops, "AMD Performance Counters v%I%", &opt_pcbe_ops }; static struct modlinkage modl = { MODREV_1, &modlpcbe, }; int _init(void) { int ret; if (opt_pcbe_init() != 0) return (ENOTSUP); if ((ret = mod_install(&modl)) != 0) kmem_free(evlist, evlist_sz + 1); return (ret); } int _fini(void) { int ret; if ((ret = mod_remove(&modl)) == 0) kmem_free(evlist, evlist_sz + 1); return (ret); } int _info(struct modinfo *mi) { return (mod_info(&modl, mi)); }