// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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 .
*/
#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" );
static 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,
};
const 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 &= 0 xff0fe;
/* PM_MRK_FAB_RSP_MATCH & PM_MRK_FAB_RSP_MATCH_CYC */
return (event == 0 x30056 || event == 0 x4f052);
}
static bool is_event_valid(u64 event)
{
u64 valid_mask = EVENT_VALID_MASK;
if (cpu_has_feature(CPU_FTR_ARCH_31))
valid_mask = p10_EVENT_VALID_MASK;
else 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 unsigned long sdar_mod_val(u64 event)
{
if (cpu_has_feature(CPU_FTR_ARCH_31))
return p10_SDAR_MODE(event);
return p9_SDAR_MODE(event);
}
static void mmcra_sdar_mode(u64 event, unsigned long *mmcra)
{
/*
* MMCRA [ SDAR_MODE ] specifies how the SDAR should be updated in
* continuous sampling mode .
*
* Incase of Power8 :
* MMCRA [ SDAR_MODE ] will be programmed as " 0 b01 " for continuous sampling
* mode and will be un - changed when setting MMCRA [ 63 ] ( Marked events ) .
*
* Incase of Power9 / power10 :
* Marked event : MMCRA [ SDAR_MODE ] will be set to 0 b00 ( ' 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 0 b01 . 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 (sdar_mod_val(event))
*mmcra |= sdar_mod_val(event) << MMCRA_SDAR_MODE_SHIFT;
else
*mmcra |= MMCRA_SDAR_MODE_DCACHE;
} else
*mmcra |= MMCRA_SDAR_MODE_TLB;
}
static int p10_thresh_cmp_val(u64 value)
{
int exp = 0 ;
u64 result = value;
if (!value)
return value;
/*
* Incase of P10 , thresh_cmp value is not part of raw event code
* and provided via attr . config1 parameter . To program threshold in MMCRA ,
* take a 18 bit number N and shift right 2 places and increment
* the exponent E by 1 until the upper 10 bits of N are zero .
* Write E to the threshold exponent and write the lower 8 bits of N
* to the threshold mantissa .
* The max threshold that can be written is 261120 .
*/
if (cpu_has_feature(CPU_FTR_ARCH_31)) {
if (value > 261120 )
value = 261120 ;
while ((64 - __builtin_clzl(value)) > 8 ) {
exp++;
value >>= 2 ;
}
/*
* Note that it is invalid to write a mantissa with the
* upper 2 bits of mantissa being zero , unless the
* exponent is also zero .
*/
if (!(value & 0 xC0) && exp)
result = -1 ;
else
result = (exp << 8 ) | value;
}
return result;
}
static u64 thresh_cmp_val(u64 value)
{
if (cpu_has_feature(CPU_FTR_ARCH_31))
value = p10_thresh_cmp_val(value);
/*
* Since location of threshold compare bits in MMCRA
* is different for p8 , using different shift value .
*/
if (cpu_has_feature(CPU_FTR_ARCH_300))
return value << p9_MMCRA_THR_CMP_SHIFT;
else
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;
if (cpu_has_feature(CPU_FTR_ARCH_31))
return p10_thresh_cmp_val(event) >= 0 ;
/*
* 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 & 0 x60) == 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) | LEVEL(L1) | P(SNOOP, HIT);
break ;
case 2 :
ret = PH(LVL, L2) | LEVEL(L2) | P(SNOOP, HIT);
break ;
case 3 :
ret = PH(LVL, L3) | LEVEL(L3) | P(SNOOP, HIT);
break ;
case 4 :
if (cpu_has_feature(CPU_FTR_ARCH_31)) {
ret = P(SNOOP, HIT);
if (sub_idx == 1 )
ret |= PH(LVL, LOC_RAM) | LEVEL(RAM);
else if (sub_idx == 2 || sub_idx == 3 )
ret |= P(LVL, HIT) | LEVEL(PMEM);
else if (sub_idx == 4 )
ret |= PH(LVL, REM_RAM1) | REM | LEVEL(RAM) | P(HOPS, 2 );
else if (sub_idx == 5 || sub_idx == 7 )
ret |= P(LVL, HIT) | LEVEL(PMEM) | REM;
else if (sub_idx == 6 )
ret |= PH(LVL, REM_RAM2) | REM | LEVEL(RAM) | P(HOPS, 3 );
} else {
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 :
if (cpu_has_feature(CPU_FTR_ARCH_31)) {
ret = REM | P(HOPS, 0 );
if (sub_idx == 0 || sub_idx == 4 )
ret |= PH(LVL, L2) | LEVEL(L2) | P(SNOOP, HIT);
else if (sub_idx == 1 || sub_idx == 5 )
ret |= PH(LVL, L2) | LEVEL(L2) | P(SNOOP, HITM);
else if (sub_idx == 2 || sub_idx == 6 )
ret |= PH(LVL, L3) | LEVEL(L3) | P(SNOOP, HIT);
else if (sub_idx == 3 || sub_idx == 7 )
ret |= PH(LVL, L3) | LEVEL(L3) | P(SNOOP, HITM);
} else {
if (sub_idx == 0 )
ret = PH(LVL, L2) | LEVEL(L2) | REM | P(SNOOP, HIT) | P(HOPS, 0 );
else if (sub_idx == 1 )
ret = PH(LVL, L2) | LEVEL(L2) | REM | P(SNOOP, HITM) | P(HOPS, 0 );
else if (sub_idx == 2 || sub_idx == 4 )
ret = PH(LVL, L3) | LEVEL(L3) | REM | P(SNOOP, HIT) | P(HOPS, 0 );
else if (sub_idx == 3 || sub_idx == 5 )
ret = PH(LVL, L3) | LEVEL(L3) | REM | P(SNOOP, HITM) | P(HOPS, 0 );
}
break ;
case 6 :
if (cpu_has_feature(CPU_FTR_ARCH_31)) {
if (sub_idx == 0 )
ret = PH(LVL, REM_CCE1) | LEVEL(ANY_CACHE) | REM |
P(SNOOP, HIT) | P(HOPS, 2 );
else if (sub_idx == 1 )
ret = PH(LVL, REM_CCE1) | LEVEL(ANY_CACHE) | REM |
P(SNOOP, HITM) | P(HOPS, 2 );
else if (sub_idx == 2 )
ret = PH(LVL, REM_CCE2) | LEVEL(ANY_CACHE) | REM |
P(SNOOP, HIT) | P(HOPS, 3 );
else if (sub_idx == 3 )
ret = PH(LVL, REM_CCE2) | LEVEL(ANY_CACHE) | REM |
P(SNOOP, HITM) | P(HOPS, 3 );
} else {
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 ;
}
/*
* Use regs - dar for SPRN_SIER which is saved
* during perf_read_regs at the beginning
* of the PMU interrupt handler to avoid multiple
* reads of SPRN_SIER
*/
sier = regs->dar;
val = (sier & ISA207_SIER_TYPE_MASK) >> ISA207_SIER_TYPE_SHIFT;
if (val != 1 && val != 2 && !(val == 7 && cpu_has_feature(CPU_FTR_ARCH_31))) {
dsrc->val = 0 ;
return ;
}
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);
if (val == 7 ) {
u64 mmcra;
u32 op_type;
/*
* Type 0 b111 denotes either larx or stcx instruction . Use the
* MMCRA sampling bits [ 57 : 59 ] along with the type value
* to determine the exact instruction type . If the sampling
* criteria is neither load or store , set the type as default
* to NA .
*
* Use regs - > dsisr for MMCRA which is saved during perf_read_regs
* at the beginning of the PMU interrupt handler to avoid
* multiple reads of SPRN_MMCRA
*/
mmcra = regs->dsisr;
op_type = (mmcra >> MMCRA_SAMP_ELIG_SHIFT) & MMCRA_SAMP_ELIG_MASK;
switch (op_type) {
case 5 :
dsrc->val |= P(OP, LOAD);
break ;
case 7 :
dsrc->val |= P(OP, STORE);
break ;
default :
dsrc->val |= P(OP, NA);
break ;
}
} else {
dsrc->val |= (val == 1 ) ? P(OP, LOAD) : P(OP, STORE);
}
}
void isa207_get_mem_weight(u64 *weight, u64 type)
{
union perf_sample_weight *weight_fields;
u64 weight_lat;
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 (cpu_has_feature(CPU_FTR_ARCH_31))
mantissa = P10_MMCRA_THR_CTR_MANT(mmcra);
if (val == 0 || (val == 7 && !cpu_has_feature(CPU_FTR_ARCH_31)))
weight_lat = 0 ;
else
weight_lat = mantissa << (2 * exp);
/*
* Use 64 bit weight field ( full ) if sample type is
* WEIGHT .
*
* if sample type is WEIGHT_STRUCT :
* - store memory latency in the lower 32 bits .
* - For ISA v3 . 1 , use remaining two 16 bit fields of
* perf_sample_weight to store cycle counter values
* from sier2 .
*/
weight_fields = (union perf_sample_weight *)weight;
if (type & PERF_SAMPLE_WEIGHT)
weight_fields->full = weight_lat;
else {
weight_fields->var1_dw = (u32)weight_lat;
if (cpu_has_feature(CPU_FTR_ARCH_31)) {
weight_fields->var2_w = P10_SIER2_FINISH_CYC(mfspr(SPRN_SIER2));
weight_fields->var3_w = P10_SIER2_DISPATCH_CYC(mfspr(SPRN_SIER2));
}
}
}
int isa207_get_constraint(u64 event, unsigned long *maskp, unsigned long *valp, u64 event_config1)
{
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;
if (cpu_has_feature(CPU_FTR_ARCH_31))
cache = (event >> EVENT_CACHE_SEL_SHIFT) &
p10_EVENT_CACHE_SEL_MASK;
else
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 != 0 x500fa &&
base_event != 0 x600f4)
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 ) {
if (cpu_has_feature(CPU_FTR_ARCH_31)) {
if (unit == 6 ) {
mask |= CNST_L2L3_GROUP_MASK;
value |= CNST_L2L3_GROUP_VAL(event >> p10_L2L3_EVENT_SHIFT);
}
} else if (cpu_has_feature(CPU_FTR_ARCH_300)) {
mask |= CNST_CACHE_GROUP_MASK;
value |= CNST_CACHE_GROUP_VAL(event & 0 xff);
mask |= CNST_CACHE_PMC4_MASK;
if (pmc == 4 )
value |= CNST_CACHE_PMC4_VAL;
} else if (cache & 0 x7) {
/*
* 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 .
*/
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 (cpu_has_feature(CPU_FTR_ARCH_31)) {
mask |= CNST_RADIX_SCOPE_GROUP_MASK;
value |= CNST_RADIX_SCOPE_GROUP_VAL(event >> p10_EVENT_RADIX_SCOPE_QUAL_SHIFT);
}
if (is_event_marked(event)) {
mask |= CNST_SAMPLE_MASK;
value |= CNST_SAMPLE_VAL(event >> EVENT_SAMPLE_SHIFT);
}
if (cpu_has_feature(CPU_FTR_ARCH_31)) {
if (event_is_threshold(event) && is_thresh_cmp_valid(event_config1)) {
mask |= CNST_THRESH_CTL_SEL_MASK;
value |= CNST_THRESH_CTL_SEL_VAL(event >> EVENT_THRESH_SHIFT);
mask |= p10_CNST_THRESH_CMP_MASK;
value |= p10_CNST_THRESH_CMP_VAL(p10_thresh_cmp_val(event_config1));
} else if (event_is_threshold(event))
return -1 ;
} else 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[], struct mmcr_regs *mmcr,
struct perf_event *pevents[], u32 flags)
{
unsigned long mmcra, mmcr1, mmcr2, unit, combine, psel, cache, val;
unsigned long mmcr3;
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 = mmcr3 = 0 ;
/*
* Disable bhrb unless explicitly requested
* by setting MMCRA ( BHRBRD ) bit .
*/
if (cpu_has_feature(CPU_FTR_ARCH_31))
mmcra |= MMCRA_BHRB_DISABLE;
/* 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;
}
}
/* Set RADIX_SCOPE_QUAL bit */
if (cpu_has_feature(CPU_FTR_ARCH_31)) {
val = (event[i] >> p10_EVENT_RADIX_SCOPE_QUAL_SHIFT) &
p10_EVENT_RADIX_SCOPE_QUAL_MASK;
mmcr1 |= val << p10_MMCR1_RADIX_SCOPE_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;
if (!cpu_has_feature(CPU_FTR_ARCH_31)) {
val = (event[i] >> EVENT_THR_CMP_SHIFT) &
EVENT_THR_CMP_MASK;
mmcra |= thresh_cmp_val(val);
} else if (flags & PPMU_HAS_ATTR_CONFIG1) {
val = (pevents[i]->attr.config1 >> p10_EVENT_THR_CMP_SHIFT) &
p10_EVENT_THR_CMP_MASK;
mmcra |= thresh_cmp_val(val);
}
}
if (cpu_has_feature(CPU_FTR_ARCH_31) && (unit == 6 )) {
val = (event[i] >> p10_L2L3_EVENT_SHIFT) &
p10_EVENT_L2L3_SEL_MASK;
mmcr2 |= val << p10_L2L3_SEL_SHIFT;
}
if (event[i] & EVENT_WANTS_BHRB) {
val = (event[i] >> EVENT_IFM_SHIFT) & EVENT_IFM_MASK;
mmcra |= val << MMCRA_IFM_SHIFT;
}
/* set MMCRA (BHRBRD) to 0 if there is user request for BHRB */
if (cpu_has_feature(CPU_FTR_ARCH_31) &&
(has_branch_stack(pevents[i]) || (event[i] & EVENT_WANTS_BHRB)))
mmcra &= ~MMCRA_BHRB_DISABLE;
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);
}
if (pevents[i]->attr.exclude_idle)
mmcr2 |= MMCR2_FCWAIT(pmc);
if (cpu_has_feature(CPU_FTR_ARCH_31)) {
if (pmc <= 4 ) {
val = (event[i] >> p10_EVENT_MMCR3_SHIFT) &
p10_EVENT_MMCR3_MASK;
mmcr3 |= val << MMCR3_SHIFT(pmc);
}
}
hwc[i] = pmc - 1 ;
}
/* Return MMCRx values */
mmcr->mmcr0 = 0 ;
/* pmc_inuse is 1-based */
if (pmc_inuse & 2 )
mmcr->mmcr0 = MMCR0_PMC1CE;
if (pmc_inuse & 0 x7c)
mmcr->mmcr0 |= MMCR0_PMCjCE;
/* If we're not using PMC 5 or 6, freeze them */
if (!(pmc_inuse & 0 x60))
mmcr->mmcr0 |= MMCR0_FC56;
/*
* Set mmcr0 ( PMCCEXT ) for p10 which
* will restrict access to group B registers
* when MMCR0 PMCC = 0 b00 .
*/
if (cpu_has_feature(CPU_FTR_ARCH_31))
mmcr->mmcr0 |= MMCR0_PMCCEXT;
mmcr->mmcr1 = mmcr1;
mmcr->mmcra = mmcra;
mmcr->mmcr2 = mmcr2;
mmcr->mmcr3 = mmcr3;
return 0 ;
}
void isa207_disable_pmc(unsigned int pmc, struct mmcr_regs *mmcr)
{
if (pmc <= 3 )
mmcr->mmcr1 &= ~(0 xffUL << 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 0 x1e: /* PMC_CYC */
alt[j++] = 0 x600f4; /* PM_RUN_CYC */
break ;
case 0 x600f4:
alt[j++] = 0 x1e;
break ;
case 0 x2: /* PM_INST_CMPL */
alt[j++] = 0 x500fa; /* PM_RUN_INST_CMPL */
break ;
case 0 x500fa:
alt[j++] = 0 x2;
break ;
}
}
num_alt = j;
}
return num_alt;
}
int isa3XX_check_attr_config(struct perf_event *ev)
{
u64 val, sample_mode;
u64 event = ev->attr.config;
val = (event >> EVENT_SAMPLE_SHIFT) & EVENT_SAMPLE_MASK;
sample_mode = val & 0 x3;
/*
* MMCRA [ 61 : 62 ] is Random Sampling Mode ( SM ) .
* value of 0 b11 is reserved .
*/
if (sample_mode == 0 x3)
return -EINVAL;
/*
* Check for all reserved value
* Source : Performance Monitoring Unit User Guide
*/
switch (val) {
case 0 x5:
case 0 x9:
case 0 xD:
case 0 x19:
case 0 x1D:
case 0 x1A:
case 0 x1E:
return -EINVAL;
}
/*
* MMCRA [ 48 : 51 ] / [ 52 : 55 ] ) Threshold Start / Stop
* Events Selection .
* 0 b11110000 / 0 b00001111 is reserved .
*/
val = (event >> EVENT_THR_CTL_SHIFT) & EVENT_THR_CTL_MASK;
if (((val & 0 xF0) == 0 xF0) || ((val & 0 xF) == 0 xF))
return -EINVAL;
return 0 ;
}
Messung V0.5 in Prozent C=97 H=96 G=96
¤ Dauer der Verarbeitung: 0.14 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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