--- /dev/null
+/*
+ * Common Performance counter support functions for PowerISA v2.07 processors.
+ *
+ * Copyright 2009 Paul Mackerras, IBM Corporation.
+ * Copyright 2013 Michael Ellerman, IBM Corporation.
+ * Copyright 2016 Madhavan Srinivasan, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "isa207-common.h"
+
+static inline bool event_is_fab_match(u64 event)
+{
+ /* Only check pmc, unit and pmcxsel, ignore the edge bit (0) */
+ event &= 0xff0fe;
+
+ /* PM_MRK_FAB_RSP_MATCH & PM_MRK_FAB_RSP_MATCH_CYC */
+ return (event == 0x30056 || event == 0x4f052);
+}
+
+int isa207_get_constraint(u64 event, unsigned long *maskp, unsigned long *valp)
+{
+ unsigned int unit, pmc, cache, ebb;
+ unsigned long mask, value;
+
+ mask = value = 0;
+
+ if (event & ~EVENT_VALID_MASK)
+ return -1;
+
+ pmc = (event >> EVENT_PMC_SHIFT) & EVENT_PMC_MASK;
+ unit = (event >> EVENT_UNIT_SHIFT) & EVENT_UNIT_MASK;
+ cache = (event >> EVENT_CACHE_SEL_SHIFT) & EVENT_CACHE_SEL_MASK;
+ ebb = (event >> EVENT_EBB_SHIFT) & EVENT_EBB_MASK;
+
+ if (pmc) {
+ u64 base_event;
+
+ if (pmc > 6)
+ return -1;
+
+ /* Ignore Linux defined bits when checking event below */
+ base_event = event & ~EVENT_LINUX_MASK;
+
+ if (pmc >= 5 && base_event != 0x500fa &&
+ base_event != 0x600f4)
+ return -1;
+
+ mask |= CNST_PMC_MASK(pmc);
+ value |= CNST_PMC_VAL(pmc);
+ }
+
+ if (pmc <= 4) {
+ /*
+ * Add to number of counters in use. Note this includes events with
+ * a PMC of 0 - they still need a PMC, it's just assigned later.
+ * Don't count events on PMC 5 & 6, there is only one valid event
+ * on each of those counters, and they are handled above.
+ */
+ mask |= CNST_NC_MASK;
+ value |= CNST_NC_VAL;
+ }
+
+ if (unit >= 6 && unit <= 9) {
+ /*
+ * L2/L3 events contain a cache selector field, which is
+ * supposed to be programmed into MMCRC. However MMCRC is only
+ * HV writable, and there is no API for guest kernels to modify
+ * it. The solution is for the hypervisor to initialise the
+ * field to zeroes, and for us to only ever allow events that
+ * have a cache selector of zero. The bank selector (bit 3) is
+ * irrelevant, as long as the rest of the value is 0.
+ */
+ if (cache & 0x7)
+ return -1;
+
+ } else if (event & EVENT_IS_L1) {
+ mask |= CNST_L1_QUAL_MASK;
+ value |= CNST_L1_QUAL_VAL(cache);
+ }
+
+ if (event & EVENT_IS_MARKED) {
+ mask |= CNST_SAMPLE_MASK;
+ value |= CNST_SAMPLE_VAL(event >> EVENT_SAMPLE_SHIFT);
+ }
+
+ /*
+ * Special case for PM_MRK_FAB_RSP_MATCH and PM_MRK_FAB_RSP_MATCH_CYC,
+ * the threshold control bits are used for the match value.
+ */
+ if (event_is_fab_match(event)) {
+ mask |= CNST_FAB_MATCH_MASK;
+ value |= CNST_FAB_MATCH_VAL(event >> EVENT_THR_CTL_SHIFT);
+ } else {
+ /*
+ * Check the mantissa upper two bits are not zero, unless the
+ * exponent is also zero. See the THRESH_CMP_MANTISSA doc.
+ */
+ unsigned int cmp, exp;
+
+ cmp = (event >> EVENT_THR_CMP_SHIFT) & EVENT_THR_CMP_MASK;
+ exp = cmp >> 7;
+
+ if (exp && (cmp & 0x60) == 0)
+ return -1;
+
+ mask |= CNST_THRESH_MASK;
+ value |= CNST_THRESH_VAL(event >> EVENT_THRESH_SHIFT);
+ }
+
+ if (!pmc && ebb)
+ /* EBB events must specify the PMC */
+ return -1;
+
+ if (event & EVENT_WANTS_BHRB) {
+ if (!ebb)
+ /* Only EBB events can request BHRB */
+ return -1;
+
+ mask |= CNST_IFM_MASK;
+ value |= CNST_IFM_VAL(event >> EVENT_IFM_SHIFT);
+ }
+
+ /*
+ * All events must agree on EBB, either all request it or none.
+ * EBB events are pinned & exclusive, so this should never actually
+ * hit, but we leave it as a fallback in case.
+ */
+ mask |= CNST_EBB_VAL(ebb);
+ value |= CNST_EBB_MASK;
+
+ *maskp = mask;
+ *valp = value;
+
+ return 0;
+}
+
+int isa207_compute_mmcr(u64 event[], int n_ev,
+ unsigned int hwc[], unsigned long mmcr[],
+ struct perf_event *pevents[])
+{
+ unsigned long mmcra, mmcr1, mmcr2, unit, combine, psel, cache, val;
+ unsigned int pmc, pmc_inuse;
+ int i;
+
+ pmc_inuse = 0;
+
+ /* First pass to count resource use */
+ for (i = 0; i < n_ev; ++i) {
+ pmc = (event[i] >> EVENT_PMC_SHIFT) & EVENT_PMC_MASK;
+ if (pmc)
+ pmc_inuse |= 1 << pmc;
+ }
+
+ /* In continuous sampling mode, update SDAR on TLB miss */
+ mmcra = MMCRA_SDAR_MODE_TLB;
+ mmcr1 = mmcr2 = 0;
+
+ /* Second pass: assign PMCs, set all MMCR1 fields */
+ for (i = 0; i < n_ev; ++i) {
+ pmc = (event[i] >> EVENT_PMC_SHIFT) & EVENT_PMC_MASK;
+ unit = (event[i] >> EVENT_UNIT_SHIFT) & EVENT_UNIT_MASK;
+ combine = (event[i] >> EVENT_COMBINE_SHIFT) & EVENT_COMBINE_MASK;
+ psel = event[i] & EVENT_PSEL_MASK;
+
+ if (!pmc) {
+ for (pmc = 1; pmc <= 4; ++pmc) {
+ if (!(pmc_inuse & (1 << pmc)))
+ break;
+ }
+
+ pmc_inuse |= 1 << pmc;
+ }
+
+ if (pmc <= 4) {
+ mmcr1 |= unit << MMCR1_UNIT_SHIFT(pmc);
+ mmcr1 |= combine << MMCR1_COMBINE_SHIFT(pmc);
+ mmcr1 |= psel << MMCR1_PMCSEL_SHIFT(pmc);
+ }
+
+ if (event[i] & EVENT_IS_L1) {
+ cache = event[i] >> EVENT_CACHE_SEL_SHIFT;
+ mmcr1 |= (cache & 1) << MMCR1_IC_QUAL_SHIFT;
+ cache >>= 1;
+ mmcr1 |= (cache & 1) << MMCR1_DC_QUAL_SHIFT;
+ }
+
+ if (event[i] & EVENT_IS_MARKED) {
+ mmcra |= MMCRA_SAMPLE_ENABLE;
+
+ val = (event[i] >> EVENT_SAMPLE_SHIFT) & EVENT_SAMPLE_MASK;
+ if (val) {
+ mmcra |= (val & 3) << MMCRA_SAMP_MODE_SHIFT;
+ mmcra |= (val >> 2) << MMCRA_SAMP_ELIG_SHIFT;
+ }
+ }
+
+ /*
+ * PM_MRK_FAB_RSP_MATCH and PM_MRK_FAB_RSP_MATCH_CYC,
+ * the threshold bits are used for the match value.
+ */
+ if (event_is_fab_match(event[i])) {
+ mmcr1 |= ((event[i] >> EVENT_THR_CTL_SHIFT) &
+ EVENT_THR_CTL_MASK) << MMCR1_FAB_SHIFT;
+ } else {
+ val = (event[i] >> EVENT_THR_CTL_SHIFT) & EVENT_THR_CTL_MASK;
+ mmcra |= val << MMCRA_THR_CTL_SHIFT;
+ val = (event[i] >> EVENT_THR_SEL_SHIFT) & EVENT_THR_SEL_MASK;
+ mmcra |= val << MMCRA_THR_SEL_SHIFT;
+ val = (event[i] >> EVENT_THR_CMP_SHIFT) & EVENT_THR_CMP_MASK;
+ mmcra |= val << MMCRA_THR_CMP_SHIFT;
+ }
+
+ if (event[i] & EVENT_WANTS_BHRB) {
+ val = (event[i] >> EVENT_IFM_SHIFT) & EVENT_IFM_MASK;
+ mmcra |= val << MMCRA_IFM_SHIFT;
+ }
+
+ if (pevents[i]->attr.exclude_user)
+ mmcr2 |= MMCR2_FCP(pmc);
+
+ if (pevents[i]->attr.exclude_hv)
+ mmcr2 |= MMCR2_FCH(pmc);
+
+ if (pevents[i]->attr.exclude_kernel) {
+ if (cpu_has_feature(CPU_FTR_HVMODE))
+ mmcr2 |= MMCR2_FCH(pmc);
+ else
+ mmcr2 |= MMCR2_FCS(pmc);
+ }
+
+ hwc[i] = pmc - 1;
+ }
+
+ /* Return MMCRx values */
+ mmcr[0] = 0;
+
+ /* pmc_inuse is 1-based */
+ if (pmc_inuse & 2)
+ mmcr[0] = MMCR0_PMC1CE;
+
+ if (pmc_inuse & 0x7c)
+ mmcr[0] |= MMCR0_PMCjCE;
+
+ /* If we're not using PMC 5 or 6, freeze them */
+ if (!(pmc_inuse & 0x60))
+ mmcr[0] |= MMCR0_FC56;
+
+ mmcr[1] = mmcr1;
+ mmcr[2] = mmcra;
+ mmcr[3] = mmcr2;
+
+ return 0;
+}
+
+void isa207_disable_pmc(unsigned int pmc, unsigned long mmcr[])
+{
+ if (pmc <= 3)
+ mmcr[1] &= ~(0xffUL << MMCR1_PMCSEL_SHIFT(pmc + 1));
+}
#define POWER8_MMCRA_IFM2 0x0000000080000000UL
#define POWER8_MMCRA_IFM3 0x00000000C0000000UL
-static inline bool event_is_fab_match(u64 event)
-{
- /* Only check pmc, unit and pmcxsel, ignore the edge bit (0) */
- event &= 0xff0fe;
-
- /* PM_MRK_FAB_RSP_MATCH & PM_MRK_FAB_RSP_MATCH_CYC */
- return (event == 0x30056 || event == 0x4f052);
-}
-
-static int power8_get_constraint(u64 event, unsigned long *maskp, unsigned long *valp)
-{
- unsigned int unit, pmc, cache, ebb;
- unsigned long mask, value;
-
- mask = value = 0;
-
- if (event & ~EVENT_VALID_MASK)
- return -1;
-
- pmc = (event >> EVENT_PMC_SHIFT) & EVENT_PMC_MASK;
- unit = (event >> EVENT_UNIT_SHIFT) & EVENT_UNIT_MASK;
- cache = (event >> EVENT_CACHE_SEL_SHIFT) & EVENT_CACHE_SEL_MASK;
- ebb = (event >> EVENT_EBB_SHIFT) & EVENT_EBB_MASK;
-
- if (pmc) {
- u64 base_event;
-
- if (pmc > 6)
- return -1;
-
- /* Ignore Linux defined bits when checking event below */
- base_event = event & ~EVENT_LINUX_MASK;
-
- if (pmc >= 5 && base_event != PM_RUN_INST_CMPL &&
- base_event != PM_RUN_CYC)
- return -1;
-
- mask |= CNST_PMC_MASK(pmc);
- value |= CNST_PMC_VAL(pmc);
- }
-
- if (pmc <= 4) {
- /*
- * Add to number of counters in use. Note this includes events with
- * a PMC of 0 - they still need a PMC, it's just assigned later.
- * Don't count events on PMC 5 & 6, there is only one valid event
- * on each of those counters, and they are handled above.
- */
- mask |= CNST_NC_MASK;
- value |= CNST_NC_VAL;
- }
-
- if (unit >= 6 && unit <= 9) {
- /*
- * L2/L3 events contain a cache selector field, which is
- * supposed to be programmed into MMCRC. However MMCRC is only
- * HV writable, and there is no API for guest kernels to modify
- * it. The solution is for the hypervisor to initialise the
- * field to zeroes, and for us to only ever allow events that
- * have a cache selector of zero. The bank selector (bit 3) is
- * irrelevant, as long as the rest of the value is 0.
- */
- if (cache & 0x7)
- return -1;
-
- } else if (event & EVENT_IS_L1) {
- mask |= CNST_L1_QUAL_MASK;
- value |= CNST_L1_QUAL_VAL(cache);
- }
-
- if (event & EVENT_IS_MARKED) {
- mask |= CNST_SAMPLE_MASK;
- value |= CNST_SAMPLE_VAL(event >> EVENT_SAMPLE_SHIFT);
- }
-
- /*
- * Special case for PM_MRK_FAB_RSP_MATCH and PM_MRK_FAB_RSP_MATCH_CYC,
- * the threshold control bits are used for the match value.
- */
- if (event_is_fab_match(event)) {
- mask |= CNST_FAB_MATCH_MASK;
- value |= CNST_FAB_MATCH_VAL(event >> EVENT_THR_CTL_SHIFT);
- } else {
- /*
- * Check the mantissa upper two bits are not zero, unless the
- * exponent is also zero. See the THRESH_CMP_MANTISSA doc.
- */
- unsigned int cmp, exp;
-
- cmp = (event >> EVENT_THR_CMP_SHIFT) & EVENT_THR_CMP_MASK;
- exp = cmp >> 7;
-
- if (exp && (cmp & 0x60) == 0)
- return -1;
-
- mask |= CNST_THRESH_MASK;
- value |= CNST_THRESH_VAL(event >> EVENT_THRESH_SHIFT);
- }
-
- if (!pmc && ebb)
- /* EBB events must specify the PMC */
- return -1;
-
- if (event & EVENT_WANTS_BHRB) {
- if (!ebb)
- /* Only EBB events can request BHRB */
- return -1;
-
- mask |= CNST_IFM_MASK;
- value |= CNST_IFM_VAL(event >> EVENT_IFM_SHIFT);
- }
-
- /*
- * All events must agree on EBB, either all request it or none.
- * EBB events are pinned & exclusive, so this should never actually
- * hit, but we leave it as a fallback in case.
- */
- mask |= CNST_EBB_VAL(ebb);
- value |= CNST_EBB_MASK;
-
- *maskp = mask;
- *valp = value;
-
- return 0;
-}
-
-static int power8_compute_mmcr(u64 event[], int n_ev,
- unsigned int hwc[], unsigned long mmcr[],
- struct perf_event *pevents[])
-{
- unsigned long mmcra, mmcr1, mmcr2, unit, combine, psel, cache, val;
- unsigned int pmc, pmc_inuse;
- int i;
-
- pmc_inuse = 0;
-
- /* First pass to count resource use */
- for (i = 0; i < n_ev; ++i) {
- pmc = (event[i] >> EVENT_PMC_SHIFT) & EVENT_PMC_MASK;
- if (pmc)
- pmc_inuse |= 1 << pmc;
- }
-
- /* In continuous sampling mode, update SDAR on TLB miss */
- mmcra = MMCRA_SDAR_MODE_TLB;
- mmcr1 = mmcr2 = 0;
-
- /* Second pass: assign PMCs, set all MMCR1 fields */
- for (i = 0; i < n_ev; ++i) {
- pmc = (event[i] >> EVENT_PMC_SHIFT) & EVENT_PMC_MASK;
- unit = (event[i] >> EVENT_UNIT_SHIFT) & EVENT_UNIT_MASK;
- combine = (event[i] >> EVENT_COMBINE_SHIFT) & EVENT_COMBINE_MASK;
- psel = event[i] & EVENT_PSEL_MASK;
-
- if (!pmc) {
- for (pmc = 1; pmc <= 4; ++pmc) {
- if (!(pmc_inuse & (1 << pmc)))
- break;
- }
-
- pmc_inuse |= 1 << pmc;
- }
-
- if (pmc <= 4) {
- mmcr1 |= unit << MMCR1_UNIT_SHIFT(pmc);
- mmcr1 |= combine << MMCR1_COMBINE_SHIFT(pmc);
- mmcr1 |= psel << MMCR1_PMCSEL_SHIFT(pmc);
- }
-
- if (event[i] & EVENT_IS_L1) {
- cache = event[i] >> EVENT_CACHE_SEL_SHIFT;
- mmcr1 |= (cache & 1) << MMCR1_IC_QUAL_SHIFT;
- cache >>= 1;
- mmcr1 |= (cache & 1) << MMCR1_DC_QUAL_SHIFT;
- }
-
- if (event[i] & EVENT_IS_MARKED) {
- mmcra |= MMCRA_SAMPLE_ENABLE;
-
- val = (event[i] >> EVENT_SAMPLE_SHIFT) & EVENT_SAMPLE_MASK;
- if (val) {
- mmcra |= (val & 3) << MMCRA_SAMP_MODE_SHIFT;
- mmcra |= (val >> 2) << MMCRA_SAMP_ELIG_SHIFT;
- }
- }
-
- /*
- * PM_MRK_FAB_RSP_MATCH and PM_MRK_FAB_RSP_MATCH_CYC,
- * the threshold bits are used for the match value.
- */
- if (event_is_fab_match(event[i])) {
- mmcr1 |= ((event[i] >> EVENT_THR_CTL_SHIFT) &
- EVENT_THR_CTL_MASK) << MMCR1_FAB_SHIFT;
- } else {
- val = (event[i] >> EVENT_THR_CTL_SHIFT) & EVENT_THR_CTL_MASK;
- mmcra |= val << MMCRA_THR_CTL_SHIFT;
- val = (event[i] >> EVENT_THR_SEL_SHIFT) & EVENT_THR_SEL_MASK;
- mmcra |= val << MMCRA_THR_SEL_SHIFT;
- val = (event[i] >> EVENT_THR_CMP_SHIFT) & EVENT_THR_CMP_MASK;
- mmcra |= val << MMCRA_THR_CMP_SHIFT;
- }
-
- if (event[i] & EVENT_WANTS_BHRB) {
- val = (event[i] >> EVENT_IFM_SHIFT) & EVENT_IFM_MASK;
- mmcra |= val << MMCRA_IFM_SHIFT;
- }
-
- if (pevents[i]->attr.exclude_user)
- mmcr2 |= MMCR2_FCP(pmc);
-
- if (pevents[i]->attr.exclude_hv)
- mmcr2 |= MMCR2_FCH(pmc);
-
- if (pevents[i]->attr.exclude_kernel) {
- if (cpu_has_feature(CPU_FTR_HVMODE))
- mmcr2 |= MMCR2_FCH(pmc);
- else
- mmcr2 |= MMCR2_FCS(pmc);
- }
-
- hwc[i] = pmc - 1;
- }
-
- /* Return MMCRx values */
- mmcr[0] = 0;
-
- /* pmc_inuse is 1-based */
- if (pmc_inuse & 2)
- mmcr[0] = MMCR0_PMC1CE;
-
- if (pmc_inuse & 0x7c)
- mmcr[0] |= MMCR0_PMCjCE;
-
- /* If we're not using PMC 5 or 6, freeze them */
- if (!(pmc_inuse & 0x60))
- mmcr[0] |= MMCR0_FC56;
-
- mmcr[1] = mmcr1;
- mmcr[2] = mmcra;
- mmcr[3] = mmcr2;
-
- return 0;
-}
-
/* Table of alternatives, sorted by column 0 */
static const unsigned int event_alternatives[][MAX_ALT] = {
{ PM_MRK_ST_CMPL, PM_MRK_ST_CMPL_ALT },
return num_alt;
}
-static void power8_disable_pmc(unsigned int pmc, unsigned long mmcr[])
-{
- if (pmc <= 3)
- mmcr[1] &= ~(0xffUL << MMCR1_PMCSEL_SHIFT(pmc + 1));
-}
-
GENERIC_EVENT_ATTR(cpu-cycles, PM_CYC);
GENERIC_EVENT_ATTR(stalled-cycles-frontend, PM_GCT_NOSLOT_CYC);
GENERIC_EVENT_ATTR(stalled-cycles-backend, PM_CMPLU_STALL);
.max_alternatives = MAX_ALT + 1,
.add_fields = ISA207_ADD_FIELDS,
.test_adder = ISA207_TEST_ADDER,
- .compute_mmcr = power8_compute_mmcr,
+ .compute_mmcr = isa207_compute_mmcr,
.config_bhrb = power8_config_bhrb,
.bhrb_filter_map = power8_bhrb_filter_map,
- .get_constraint = power8_get_constraint,
+ .get_constraint = isa207_get_constraint,
.get_alternatives = power8_get_alternatives,
- .disable_pmc = power8_disable_pmc,
+ .disable_pmc = isa207_disable_pmc,
.flags = PPMU_HAS_SIER | PPMU_ARCH_207S,
.n_generic = ARRAY_SIZE(power8_generic_events),
.generic_events = power8_generic_events,
projects / cascardo / linux.git / commitdiff