| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Performance counter support for PPC970-family processors. |
| * |
| * Copyright 2008-2009 Paul Mackerras, IBM Corporation. |
| */ |
| #include <linux/string.h> |
| #include <linux/perf_event.h> |
| #include <asm/reg.h> |
| #include <asm/cputable.h> |
| |
| /* |
| * Bits in event code for PPC970 |
| */ |
| #define PM_PMC_SH 12 /* PMC number (1-based) for direct events */ |
| #define PM_PMC_MSK 0xf |
| #define PM_UNIT_SH 8 /* TTMMUX number and setting - unit select */ |
| #define PM_UNIT_MSK 0xf |
| #define PM_SPCSEL_SH 6 |
| #define PM_SPCSEL_MSK 3 |
| #define PM_BYTE_SH 4 /* Byte number of event bus to use */ |
| #define PM_BYTE_MSK 3 |
| #define PM_PMCSEL_MSK 0xf |
| |
| /* Values in PM_UNIT field */ |
| #define PM_NONE 0 |
| #define PM_FPU 1 |
| #define PM_VPU 2 |
| #define PM_ISU 3 |
| #define PM_IFU 4 |
| #define PM_IDU 5 |
| #define PM_STS 6 |
| #define PM_LSU0 7 |
| #define PM_LSU1U 8 |
| #define PM_LSU1L 9 |
| #define PM_LASTUNIT 9 |
| |
| /* |
| * Bits in MMCR0 for PPC970 |
| */ |
| #define MMCR0_PMC1SEL_SH 8 |
| #define MMCR0_PMC2SEL_SH 1 |
| #define MMCR_PMCSEL_MSK 0x1f |
| |
| /* |
| * Bits in MMCR1 for PPC970 |
| */ |
| #define MMCR1_TTM0SEL_SH 62 |
| #define MMCR1_TTM1SEL_SH 59 |
| #define MMCR1_TTM3SEL_SH 53 |
| #define MMCR1_TTMSEL_MSK 3 |
| #define MMCR1_TD_CP_DBG0SEL_SH 50 |
| #define MMCR1_TD_CP_DBG1SEL_SH 48 |
| #define MMCR1_TD_CP_DBG2SEL_SH 46 |
| #define MMCR1_TD_CP_DBG3SEL_SH 44 |
| #define MMCR1_PMC1_ADDER_SEL_SH 39 |
| #define MMCR1_PMC2_ADDER_SEL_SH 38 |
| #define MMCR1_PMC6_ADDER_SEL_SH 37 |
| #define MMCR1_PMC5_ADDER_SEL_SH 36 |
| #define MMCR1_PMC8_ADDER_SEL_SH 35 |
| #define MMCR1_PMC7_ADDER_SEL_SH 34 |
| #define MMCR1_PMC3_ADDER_SEL_SH 33 |
| #define MMCR1_PMC4_ADDER_SEL_SH 32 |
| #define MMCR1_PMC3SEL_SH 27 |
| #define MMCR1_PMC4SEL_SH 22 |
| #define MMCR1_PMC5SEL_SH 17 |
| #define MMCR1_PMC6SEL_SH 12 |
| #define MMCR1_PMC7SEL_SH 7 |
| #define MMCR1_PMC8SEL_SH 2 |
| |
| static short mmcr1_adder_bits[8] = { |
| MMCR1_PMC1_ADDER_SEL_SH, |
| MMCR1_PMC2_ADDER_SEL_SH, |
| MMCR1_PMC3_ADDER_SEL_SH, |
| MMCR1_PMC4_ADDER_SEL_SH, |
| MMCR1_PMC5_ADDER_SEL_SH, |
| MMCR1_PMC6_ADDER_SEL_SH, |
| MMCR1_PMC7_ADDER_SEL_SH, |
| MMCR1_PMC8_ADDER_SEL_SH |
| }; |
| |
| /* |
| * Layout of constraint bits: |
| * 6666555555555544444444443333333333222222222211111111110000000000 |
| * 3210987654321098765432109876543210987654321098765432109876543210 |
| * <><><>[ >[ >[ >< >< >< >< ><><><><><><><><> |
| * SPT0T1 UC PS1 PS2 B0 B1 B2 B3 P1P2P3P4P5P6P7P8 |
| * |
| * SP - SPCSEL constraint |
| * 48-49: SPCSEL value 0x3_0000_0000_0000 |
| * |
| * T0 - TTM0 constraint |
| * 46-47: TTM0SEL value (0=FPU, 2=IFU, 3=VPU) 0xC000_0000_0000 |
| * |
| * T1 - TTM1 constraint |
| * 44-45: TTM1SEL value (0=IDU, 3=STS) 0x3000_0000_0000 |
| * |
| * UC - unit constraint: can't have all three of FPU|IFU|VPU, ISU, IDU|STS |
| * 43: UC3 error 0x0800_0000_0000 |
| * 42: FPU|IFU|VPU events needed 0x0400_0000_0000 |
| * 41: ISU events needed 0x0200_0000_0000 |
| * 40: IDU|STS events needed 0x0100_0000_0000 |
| * |
| * PS1 |
| * 39: PS1 error 0x0080_0000_0000 |
| * 36-38: count of events needing PMC1/2/5/6 0x0070_0000_0000 |
| * |
| * PS2 |
| * 35: PS2 error 0x0008_0000_0000 |
| * 32-34: count of events needing PMC3/4/7/8 0x0007_0000_0000 |
| * |
| * B0 |
| * 28-31: Byte 0 event source 0xf000_0000 |
| * Encoding as for the event code |
| * |
| * B1, B2, B3 |
| * 24-27, 20-23, 16-19: Byte 1, 2, 3 event sources |
| * |
| * P1 |
| * 15: P1 error 0x8000 |
| * 14-15: Count of events needing PMC1 |
| * |
| * P2..P8 |
| * 0-13: Count of events needing PMC2..PMC8 |
| */ |
| |
| static unsigned char direct_marked_event[8] = { |
| (1<<2) | (1<<3), /* PMC1: PM_MRK_GRP_DISP, PM_MRK_ST_CMPL */ |
| (1<<3) | (1<<5), /* PMC2: PM_THRESH_TIMEO, PM_MRK_BRU_FIN */ |
| (1<<3) | (1<<5), /* PMC3: PM_MRK_ST_CMPL_INT, PM_MRK_VMX_FIN */ |
| (1<<4) | (1<<5), /* PMC4: PM_MRK_GRP_CMPL, PM_MRK_CRU_FIN */ |
| (1<<4) | (1<<5), /* PMC5: PM_GRP_MRK, PM_MRK_GRP_TIMEO */ |
| (1<<3) | (1<<4) | (1<<5), |
| /* PMC6: PM_MRK_ST_STS, PM_MRK_FXU_FIN, PM_MRK_GRP_ISSUED */ |
| (1<<4) | (1<<5), /* PMC7: PM_MRK_FPU_FIN, PM_MRK_INST_FIN */ |
| (1<<4) /* PMC8: PM_MRK_LSU_FIN */ |
| }; |
| |
| /* |
| * Returns 1 if event counts things relating to marked instructions |
| * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not. |
| */ |
| static int p970_marked_instr_event(u64 event) |
| { |
| int pmc, psel, unit, byte, bit; |
| unsigned int mask; |
| |
| pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; |
| psel = event & PM_PMCSEL_MSK; |
| if (pmc) { |
| if (direct_marked_event[pmc - 1] & (1 << psel)) |
| return 1; |
| if (psel == 0) /* add events */ |
| bit = (pmc <= 4)? pmc - 1: 8 - pmc; |
| else if (psel == 7 || psel == 13) /* decode events */ |
| bit = 4; |
| else |
| return 0; |
| } else |
| bit = psel; |
| |
| byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK; |
| unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK; |
| mask = 0; |
| switch (unit) { |
| case PM_VPU: |
| mask = 0x4c; /* byte 0 bits 2,3,6 */ |
| break; |
| case PM_LSU0: |
| /* byte 2 bits 0,2,3,4,6; all of byte 1 */ |
| mask = 0x085dff00; |
| break; |
| case PM_LSU1L: |
| mask = 0x50 << 24; /* byte 3 bits 4,6 */ |
| break; |
| } |
| return (mask >> (byte * 8 + bit)) & 1; |
| } |
| |
| /* Masks and values for using events from the various units */ |
| static unsigned long unit_cons[PM_LASTUNIT+1][2] = { |
| [PM_FPU] = { 0xc80000000000ull, 0x040000000000ull }, |
| [PM_VPU] = { 0xc80000000000ull, 0xc40000000000ull }, |
| [PM_ISU] = { 0x080000000000ull, 0x020000000000ull }, |
| [PM_IFU] = { 0xc80000000000ull, 0x840000000000ull }, |
| [PM_IDU] = { 0x380000000000ull, 0x010000000000ull }, |
| [PM_STS] = { 0x380000000000ull, 0x310000000000ull }, |
| }; |
| |
| static int p970_get_constraint(u64 event, unsigned long *maskp, |
| unsigned long *valp) |
| { |
| int pmc, byte, unit, sh, spcsel; |
| unsigned long mask = 0, value = 0; |
| int grp = -1; |
| |
| pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; |
| if (pmc) { |
| if (pmc > 8) |
| return -1; |
| sh = (pmc - 1) * 2; |
| mask |= 2 << sh; |
| value |= 1 << sh; |
| grp = ((pmc - 1) >> 1) & 1; |
| } |
| unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK; |
| if (unit) { |
| if (unit > PM_LASTUNIT) |
| return -1; |
| mask |= unit_cons[unit][0]; |
| value |= unit_cons[unit][1]; |
| byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK; |
| /* |
| * Bus events on bytes 0 and 2 can be counted |
| * on PMC1/2/5/6; bytes 1 and 3 on PMC3/4/7/8. |
| */ |
| if (!pmc) |
| grp = byte & 1; |
| /* Set byte lane select field */ |
| mask |= 0xfULL << (28 - 4 * byte); |
| value |= (unsigned long)unit << (28 - 4 * byte); |
| } |
| if (grp == 0) { |
| /* increment PMC1/2/5/6 field */ |
| mask |= 0x8000000000ull; |
| value |= 0x1000000000ull; |
| } else if (grp == 1) { |
| /* increment PMC3/4/7/8 field */ |
| mask |= 0x800000000ull; |
| value |= 0x100000000ull; |
| } |
| spcsel = (event >> PM_SPCSEL_SH) & PM_SPCSEL_MSK; |
| if (spcsel) { |
| mask |= 3ull << 48; |
| value |= (unsigned long)spcsel << 48; |
| } |
| *maskp = mask; |
| *valp = value; |
| return 0; |
| } |
| |
| static int p970_get_alternatives(u64 event, unsigned int flags, u64 alt[]) |
| { |
| alt[0] = event; |
| |
| /* 2 alternatives for LSU empty */ |
| if (event == 0x2002 || event == 0x3002) { |
| alt[1] = event ^ 0x1000; |
| return 2; |
| } |
| |
| return 1; |
| } |
| |
| static int p970_compute_mmcr(u64 event[], int n_ev, |
| unsigned int hwc[], unsigned long mmcr[], struct perf_event *pevents[]) |
| { |
| unsigned long mmcr0 = 0, mmcr1 = 0, mmcra = 0; |
| unsigned int pmc, unit, byte, psel; |
| unsigned int ttm, grp; |
| unsigned int pmc_inuse = 0; |
| unsigned int pmc_grp_use[2]; |
| unsigned char busbyte[4]; |
| unsigned char unituse[16]; |
| unsigned char unitmap[] = { 0, 0<<3, 3<<3, 1<<3, 2<<3, 0|4, 3|4 }; |
| unsigned char ttmuse[2]; |
| unsigned char pmcsel[8]; |
| int i; |
| int spcsel; |
| |
| if (n_ev > 8) |
| return -1; |
| |
| /* First pass to count resource use */ |
| pmc_grp_use[0] = pmc_grp_use[1] = 0; |
| memset(busbyte, 0, sizeof(busbyte)); |
| memset(unituse, 0, sizeof(unituse)); |
| for (i = 0; i < n_ev; ++i) { |
| pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK; |
| if (pmc) { |
| if (pmc_inuse & (1 << (pmc - 1))) |
| return -1; |
| pmc_inuse |= 1 << (pmc - 1); |
| /* count 1/2/5/6 vs 3/4/7/8 use */ |
| ++pmc_grp_use[((pmc - 1) >> 1) & 1]; |
| } |
| unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK; |
| byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK; |
| if (unit) { |
| if (unit > PM_LASTUNIT) |
| return -1; |
| if (!pmc) |
| ++pmc_grp_use[byte & 1]; |
| if (busbyte[byte] && busbyte[byte] != unit) |
| return -1; |
| busbyte[byte] = unit; |
| unituse[unit] = 1; |
| } |
| } |
| if (pmc_grp_use[0] > 4 || pmc_grp_use[1] > 4) |
| return -1; |
| |
| /* |
| * Assign resources and set multiplexer selects. |
| * |
| * PM_ISU can go either on TTM0 or TTM1, but that's the only |
| * choice we have to deal with. |
| */ |
| if (unituse[PM_ISU] & |
| (unituse[PM_FPU] | unituse[PM_IFU] | unituse[PM_VPU])) |
| unitmap[PM_ISU] = 2 | 4; /* move ISU to TTM1 */ |
| /* Set TTM[01]SEL fields. */ |
| ttmuse[0] = ttmuse[1] = 0; |
| for (i = PM_FPU; i <= PM_STS; ++i) { |
| if (!unituse[i]) |
| continue; |
| ttm = unitmap[i]; |
| ++ttmuse[(ttm >> 2) & 1]; |
| mmcr1 |= (unsigned long)(ttm & ~4) << MMCR1_TTM1SEL_SH; |
| } |
| /* Check only one unit per TTMx */ |
| if (ttmuse[0] > 1 || ttmuse[1] > 1) |
| return -1; |
| |
| /* Set byte lane select fields and TTM3SEL. */ |
| for (byte = 0; byte < 4; ++byte) { |
| unit = busbyte[byte]; |
| if (!unit) |
| continue; |
| if (unit <= PM_STS) |
| ttm = (unitmap[unit] >> 2) & 1; |
| else if (unit == PM_LSU0) |
| ttm = 2; |
| else { |
| ttm = 3; |
| if (unit == PM_LSU1L && byte >= 2) |
| mmcr1 |= 1ull << (MMCR1_TTM3SEL_SH + 3 - byte); |
| } |
| mmcr1 |= (unsigned long)ttm |
| << (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte); |
| } |
| |
| /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */ |
| memset(pmcsel, 0x8, sizeof(pmcsel)); /* 8 means don't count */ |
| for (i = 0; i < n_ev; ++i) { |
| pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK; |
| unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK; |
| byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK; |
| psel = event[i] & PM_PMCSEL_MSK; |
| if (!pmc) { |
| /* Bus event or any-PMC direct event */ |
| if (unit) |
| psel |= 0x10 | ((byte & 2) << 2); |
| else |
| psel |= 8; |
| for (pmc = 0; pmc < 8; ++pmc) { |
| if (pmc_inuse & (1 << pmc)) |
| continue; |
| grp = (pmc >> 1) & 1; |
| if (unit) { |
| if (grp == (byte & 1)) |
| break; |
| } else if (pmc_grp_use[grp] < 4) { |
| ++pmc_grp_use[grp]; |
| break; |
| } |
| } |
| pmc_inuse |= 1 << pmc; |
| } else { |
| /* Direct event */ |
| --pmc; |
| if (psel == 0 && (byte & 2)) |
| /* add events on higher-numbered bus */ |
| mmcr1 |= 1ull << mmcr1_adder_bits[pmc]; |
| } |
| pmcsel[pmc] = psel; |
| hwc[i] = pmc; |
| spcsel = (event[i] >> PM_SPCSEL_SH) & PM_SPCSEL_MSK; |
| mmcr1 |= spcsel; |
| if (p970_marked_instr_event(event[i])) |
| mmcra |= MMCRA_SAMPLE_ENABLE; |
| } |
| for (pmc = 0; pmc < 2; ++pmc) |
| mmcr0 |= pmcsel[pmc] << (MMCR0_PMC1SEL_SH - 7 * pmc); |
| for (; pmc < 8; ++pmc) |
| mmcr1 |= (unsigned long)pmcsel[pmc] |
| << (MMCR1_PMC3SEL_SH - 5 * (pmc - 2)); |
| if (pmc_inuse & 1) |
| mmcr0 |= MMCR0_PMC1CE; |
| if (pmc_inuse & 0xfe) |
| mmcr0 |= MMCR0_PMCjCE; |
| |
| mmcra |= 0x2000; /* mark only one IOP per PPC instruction */ |
| |
| /* Return MMCRx values */ |
| mmcr[0] = mmcr0; |
| mmcr[1] = mmcr1; |
| mmcr[2] = mmcra; |
| return 0; |
| } |
| |
| static void p970_disable_pmc(unsigned int pmc, unsigned long mmcr[]) |
| { |
| int shift, i; |
| |
| if (pmc <= 1) { |
| shift = MMCR0_PMC1SEL_SH - 7 * pmc; |
| i = 0; |
| } else { |
| shift = MMCR1_PMC3SEL_SH - 5 * (pmc - 2); |
| i = 1; |
| } |
| /* |
| * Setting the PMCxSEL field to 0x08 disables PMC x. |
| */ |
| mmcr[i] = (mmcr[i] & ~(0x1fUL << shift)) | (0x08UL << shift); |
| } |
| |
| static int ppc970_generic_events[] = { |
| [PERF_COUNT_HW_CPU_CYCLES] = 7, |
| [PERF_COUNT_HW_INSTRUCTIONS] = 1, |
| [PERF_COUNT_HW_CACHE_REFERENCES] = 0x8810, /* PM_LD_REF_L1 */ |
| [PERF_COUNT_HW_CACHE_MISSES] = 0x3810, /* PM_LD_MISS_L1 */ |
| [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x431, /* PM_BR_ISSUED */ |
| [PERF_COUNT_HW_BRANCH_MISSES] = 0x327, /* PM_GRP_BR_MPRED */ |
| }; |
| |
| #define C(x) PERF_COUNT_HW_CACHE_##x |
| |
| /* |
| * Table of generalized cache-related events. |
| * 0 means not supported, -1 means nonsensical, other values |
| * are event codes. |
| */ |
| static int ppc970_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = { |
| [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */ |
| [C(OP_READ)] = { 0x8810, 0x3810 }, |
| [C(OP_WRITE)] = { 0x7810, 0x813 }, |
| [C(OP_PREFETCH)] = { 0x731, 0 }, |
| }, |
| [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */ |
| [C(OP_READ)] = { 0, 0 }, |
| [C(OP_WRITE)] = { -1, -1 }, |
| [C(OP_PREFETCH)] = { 0, 0 }, |
| }, |
| [C(LL)] = { /* RESULT_ACCESS RESULT_MISS */ |
| [C(OP_READ)] = { 0, 0 }, |
| [C(OP_WRITE)] = { 0, 0 }, |
| [C(OP_PREFETCH)] = { 0x733, 0 }, |
| }, |
| [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */ |
| [C(OP_READ)] = { 0, 0x704 }, |
| [C(OP_WRITE)] = { -1, -1 }, |
| [C(OP_PREFETCH)] = { -1, -1 }, |
| }, |
| [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */ |
| [C(OP_READ)] = { 0, 0x700 }, |
| [C(OP_WRITE)] = { -1, -1 }, |
| [C(OP_PREFETCH)] = { -1, -1 }, |
| }, |
| [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */ |
| [C(OP_READ)] = { 0x431, 0x327 }, |
| [C(OP_WRITE)] = { -1, -1 }, |
| [C(OP_PREFETCH)] = { -1, -1 }, |
| }, |
| [C(NODE)] = { /* RESULT_ACCESS RESULT_MISS */ |
| [C(OP_READ)] = { -1, -1 }, |
| [C(OP_WRITE)] = { -1, -1 }, |
| [C(OP_PREFETCH)] = { -1, -1 }, |
| }, |
| }; |
| |
| static struct power_pmu ppc970_pmu = { |
| .name = "PPC970/FX/MP", |
| .n_counter = 8, |
| .max_alternatives = 2, |
| .add_fields = 0x001100005555ull, |
| .test_adder = 0x013300000000ull, |
| .compute_mmcr = p970_compute_mmcr, |
| .get_constraint = p970_get_constraint, |
| .get_alternatives = p970_get_alternatives, |
| .disable_pmc = p970_disable_pmc, |
| .n_generic = ARRAY_SIZE(ppc970_generic_events), |
| .generic_events = ppc970_generic_events, |
| .cache_events = &ppc970_cache_events, |
| .flags = PPMU_NO_SIPR | PPMU_NO_CONT_SAMPLING, |
| }; |
| |
| int init_ppc970_pmu(void) |
| { |
| if (!cur_cpu_spec->oprofile_cpu_type || |
| (strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/970") |
| && strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/970MP"))) |
| return -ENODEV; |
| |
| return register_power_pmu(&ppc970_pmu); |
| } |
