summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/perf/isa207-common.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/perf/isa207-common.c')
-rw-r--r--arch/powerpc/perf/isa207-common.c559
1 files changed, 559 insertions, 0 deletions
diff --git a/arch/powerpc/perf/isa207-common.c b/arch/powerpc/perf/isa207-common.c
new file mode 100644
index 000000000..08f222776
--- /dev/null
+++ b/arch/powerpc/perf/isa207-common.c
@@ -0,0 +1,559 @@
+/*
+ * 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"
+
+PMU_FORMAT_ATTR(event, "config:0-49");
+PMU_FORMAT_ATTR(pmcxsel, "config:0-7");
+PMU_FORMAT_ATTR(mark, "config:8");
+PMU_FORMAT_ATTR(combine, "config:11");
+PMU_FORMAT_ATTR(unit, "config:12-15");
+PMU_FORMAT_ATTR(pmc, "config:16-19");
+PMU_FORMAT_ATTR(cache_sel, "config:20-23");
+PMU_FORMAT_ATTR(sample_mode, "config:24-28");
+PMU_FORMAT_ATTR(thresh_sel, "config:29-31");
+PMU_FORMAT_ATTR(thresh_stop, "config:32-35");
+PMU_FORMAT_ATTR(thresh_start, "config:36-39");
+PMU_FORMAT_ATTR(thresh_cmp, "config:40-49");
+
+struct attribute *isa207_pmu_format_attr[] = {
+ &format_attr_event.attr,
+ &format_attr_pmcxsel.attr,
+ &format_attr_mark.attr,
+ &format_attr_combine.attr,
+ &format_attr_unit.attr,
+ &format_attr_pmc.attr,
+ &format_attr_cache_sel.attr,
+ &format_attr_sample_mode.attr,
+ &format_attr_thresh_sel.attr,
+ &format_attr_thresh_stop.attr,
+ &format_attr_thresh_start.attr,
+ &format_attr_thresh_cmp.attr,
+ NULL,
+};
+
+struct attribute_group isa207_pmu_format_group = {
+ .name = "format",
+ .attrs = isa207_pmu_format_attr,
+};
+
+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 bool is_event_valid(u64 event)
+{
+ u64 valid_mask = EVENT_VALID_MASK;
+
+ if (cpu_has_feature(CPU_FTR_ARCH_300))
+ valid_mask = p9_EVENT_VALID_MASK;
+
+ return !(event & ~valid_mask);
+}
+
+static inline bool is_event_marked(u64 event)
+{
+ if (event & EVENT_IS_MARKED)
+ return true;
+
+ return false;
+}
+
+static void mmcra_sdar_mode(u64 event, unsigned long *mmcra)
+{
+ /*
+ * MMCRA[SDAR_MODE] specifices how the SDAR should be updated in
+ * continous sampling mode.
+ *
+ * Incase of Power8:
+ * MMCRA[SDAR_MODE] will be programmed as "0b01" for continous sampling
+ * mode and will be un-changed when setting MMCRA[63] (Marked events).
+ *
+ * Incase of Power9:
+ * Marked event: MMCRA[SDAR_MODE] will be set to 0b00 ('No Updates'),
+ * or if group already have any marked events.
+ * For rest
+ * MMCRA[SDAR_MODE] will be set from event code.
+ * If sdar_mode from event is zero, default to 0b01. Hardware
+ * requires that we set a non-zero value.
+ */
+ if (cpu_has_feature(CPU_FTR_ARCH_300)) {
+ if (is_event_marked(event) || (*mmcra & MMCRA_SAMPLE_ENABLE))
+ *mmcra &= MMCRA_SDAR_MODE_NO_UPDATES;
+ else if (p9_SDAR_MODE(event))
+ *mmcra |= p9_SDAR_MODE(event) << MMCRA_SDAR_MODE_SHIFT;
+ else
+ *mmcra |= MMCRA_SDAR_MODE_DCACHE;
+ } else
+ *mmcra |= MMCRA_SDAR_MODE_TLB;
+}
+
+static u64 thresh_cmp_val(u64 value)
+{
+ if (cpu_has_feature(CPU_FTR_ARCH_300))
+ return value << p9_MMCRA_THR_CMP_SHIFT;
+
+ return value << MMCRA_THR_CMP_SHIFT;
+}
+
+static unsigned long combine_from_event(u64 event)
+{
+ if (cpu_has_feature(CPU_FTR_ARCH_300))
+ return p9_EVENT_COMBINE(event);
+
+ return EVENT_COMBINE(event);
+}
+
+static unsigned long combine_shift(unsigned long pmc)
+{
+ if (cpu_has_feature(CPU_FTR_ARCH_300))
+ return p9_MMCR1_COMBINE_SHIFT(pmc);
+
+ return MMCR1_COMBINE_SHIFT(pmc);
+}
+
+static inline bool event_is_threshold(u64 event)
+{
+ return (event >> EVENT_THR_SEL_SHIFT) & EVENT_THR_SEL_MASK;
+}
+
+static bool is_thresh_cmp_valid(u64 event)
+{
+ unsigned int cmp, exp;
+
+ /*
+ * Check the mantissa upper two bits are not zero, unless the
+ * exponent is also zero. See the THRESH_CMP_MANTISSA doc.
+ */
+ cmp = (event >> EVENT_THR_CMP_SHIFT) & EVENT_THR_CMP_MASK;
+ exp = cmp >> 7;
+
+ if (exp && (cmp & 0x60) == 0)
+ return false;
+
+ return true;
+}
+
+static unsigned int dc_ic_rld_quad_l1_sel(u64 event)
+{
+ unsigned int cache;
+
+ cache = (event >> EVENT_CACHE_SEL_SHIFT) & MMCR1_DC_IC_QUAL_MASK;
+ return cache;
+}
+
+static inline u64 isa207_find_source(u64 idx, u32 sub_idx)
+{
+ u64 ret = PERF_MEM_NA;
+
+ switch(idx) {
+ case 0:
+ /* Nothing to do */
+ break;
+ case 1:
+ ret = PH(LVL, L1);
+ break;
+ case 2:
+ ret = PH(LVL, L2);
+ break;
+ case 3:
+ ret = PH(LVL, L3);
+ break;
+ case 4:
+ if (sub_idx <= 1)
+ ret = PH(LVL, LOC_RAM);
+ else if (sub_idx > 1 && sub_idx <= 2)
+ ret = PH(LVL, REM_RAM1);
+ else
+ ret = PH(LVL, REM_RAM2);
+ ret |= P(SNOOP, HIT);
+ break;
+ case 5:
+ ret = PH(LVL, REM_CCE1);
+ if ((sub_idx == 0) || (sub_idx == 2) || (sub_idx == 4))
+ ret |= P(SNOOP, HIT);
+ else if ((sub_idx == 1) || (sub_idx == 3) || (sub_idx == 5))
+ ret |= P(SNOOP, HITM);
+ break;
+ case 6:
+ ret = PH(LVL, REM_CCE2);
+ if ((sub_idx == 0) || (sub_idx == 2))
+ ret |= P(SNOOP, HIT);
+ else if ((sub_idx == 1) || (sub_idx == 3))
+ ret |= P(SNOOP, HITM);
+ break;
+ case 7:
+ ret = PM(LVL, L1);
+ break;
+ }
+
+ return ret;
+}
+
+void isa207_get_mem_data_src(union perf_mem_data_src *dsrc, u32 flags,
+ struct pt_regs *regs)
+{
+ u64 idx;
+ u32 sub_idx;
+ u64 sier;
+ u64 val;
+
+ /* Skip if no SIER support */
+ if (!(flags & PPMU_HAS_SIER)) {
+ dsrc->val = 0;
+ return;
+ }
+
+ sier = mfspr(SPRN_SIER);
+ val = (sier & ISA207_SIER_TYPE_MASK) >> ISA207_SIER_TYPE_SHIFT;
+ if (val == 1 || val == 2) {
+ idx = (sier & ISA207_SIER_LDST_MASK) >> ISA207_SIER_LDST_SHIFT;
+ sub_idx = (sier & ISA207_SIER_DATA_SRC_MASK) >> ISA207_SIER_DATA_SRC_SHIFT;
+
+ dsrc->val = isa207_find_source(idx, sub_idx);
+ dsrc->val |= (val == 1) ? P(OP, LOAD) : P(OP, STORE);
+ }
+}
+
+void isa207_get_mem_weight(u64 *weight)
+{
+ u64 mmcra = mfspr(SPRN_MMCRA);
+ u64 exp = MMCRA_THR_CTR_EXP(mmcra);
+ u64 mantissa = MMCRA_THR_CTR_MANT(mmcra);
+ u64 sier = mfspr(SPRN_SIER);
+ u64 val = (sier & ISA207_SIER_TYPE_MASK) >> ISA207_SIER_TYPE_SHIFT;
+
+ if (val == 0 || val == 7)
+ *weight = 0;
+ else
+ *weight = mantissa << (2 * exp);
+}
+
+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 (!is_event_valid(event))
+ 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);
+
+ /*
+ * PMC5 and PMC6 are used to count cycles and instructions and
+ * they do not support most of the constraint bits. Add a check
+ * to exclude PMC5/6 from most of the constraints except for
+ * EBB/BHRB.
+ */
+ if (pmc >= 5)
+ goto ebb_bhrb;
+ }
+
+ 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 (!cpu_has_feature(CPU_FTR_ARCH_300) && (cache & 0x7))
+ return -1;
+
+ } else if (cpu_has_feature(CPU_FTR_ARCH_300) || (event & EVENT_IS_L1)) {
+ mask |= CNST_L1_QUAL_MASK;
+ value |= CNST_L1_QUAL_VAL(cache);
+ }
+
+ if (is_event_marked(event)) {
+ mask |= CNST_SAMPLE_MASK;
+ value |= CNST_SAMPLE_VAL(event >> EVENT_SAMPLE_SHIFT);
+ }
+
+ if (cpu_has_feature(CPU_FTR_ARCH_300)) {
+ if (event_is_threshold(event) && is_thresh_cmp_valid(event)) {
+ mask |= CNST_THRESH_MASK;
+ value |= CNST_THRESH_VAL(event >> EVENT_THRESH_SHIFT);
+ } else if (event_is_threshold(event))
+ return -1;
+ } else {
+ /*
+ * 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 {
+ if (!is_thresh_cmp_valid(event))
+ return -1;
+
+ mask |= CNST_THRESH_MASK;
+ value |= CNST_THRESH_VAL(event >> EVENT_THRESH_SHIFT);
+ }
+ }
+
+ebb_bhrb:
+ 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_MASK;
+ value |= CNST_EBB_VAL(ebb);
+
+ *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;
+ }
+
+ mmcra = 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 = combine_from_event(event[i]);
+ 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 << combine_shift(pmc);
+ mmcr1 |= psel << MMCR1_PMCSEL_SHIFT(pmc);
+ }
+
+ /* In continuous sampling mode, update SDAR on TLB miss */
+ mmcra_sdar_mode(event[i], &mmcra);
+
+ if (cpu_has_feature(CPU_FTR_ARCH_300)) {
+ cache = dc_ic_rld_quad_l1_sel(event[i]);
+ mmcr1 |= (cache) << MMCR1_DC_IC_QUAL_SHIFT;
+ } else {
+ if (event[i] & EVENT_IS_L1) {
+ cache = dc_ic_rld_quad_l1_sel(event[i]);
+ mmcr1 |= (cache) << MMCR1_DC_IC_QUAL_SHIFT;
+ }
+ }
+
+ if (is_event_marked(event[i])) {
+ 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 (!cpu_has_feature(CPU_FTR_ARCH_300) && 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 |= thresh_cmp_val(val);
+ }
+
+ 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));
+}
+
+static int find_alternative(u64 event, const unsigned int ev_alt[][MAX_ALT], int size)
+{
+ int i, j;
+
+ for (i = 0; i < size; ++i) {
+ if (event < ev_alt[i][0])
+ break;
+
+ for (j = 0; j < MAX_ALT && ev_alt[i][j]; ++j)
+ if (event == ev_alt[i][j])
+ return i;
+ }
+
+ return -1;
+}
+
+int isa207_get_alternatives(u64 event, u64 alt[], int size, unsigned int flags,
+ const unsigned int ev_alt[][MAX_ALT])
+{
+ int i, j, num_alt = 0;
+ u64 alt_event;
+
+ alt[num_alt++] = event;
+ i = find_alternative(event, ev_alt, size);
+ if (i >= 0) {
+ /* Filter out the original event, it's already in alt[0] */
+ for (j = 0; j < MAX_ALT; ++j) {
+ alt_event = ev_alt[i][j];
+ if (alt_event && alt_event != event)
+ alt[num_alt++] = alt_event;
+ }
+ }
+
+ if (flags & PPMU_ONLY_COUNT_RUN) {
+ /*
+ * We're only counting in RUN state, so PM_CYC is equivalent to
+ * PM_RUN_CYC and PM_INST_CMPL === PM_RUN_INST_CMPL.
+ */
+ j = num_alt;
+ for (i = 0; i < num_alt; ++i) {
+ switch (alt[i]) {
+ case 0x1e: /* PMC_CYC */
+ alt[j++] = 0x600f4; /* PM_RUN_CYC */
+ break;
+ case 0x600f4:
+ alt[j++] = 0x1e;
+ break;
+ case 0x2: /* PM_INST_CMPL */
+ alt[j++] = 0x500fa; /* PM_RUN_INST_CMPL */
+ break;
+ case 0x500fa:
+ alt[j++] = 0x2;
+ break;
+ }
+ }
+ num_alt = j;
+ }
+
+ return num_alt;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 15:31:14 +0000