/*
* pfmlib_mips_perf_event.c : perf_event MIPS functions
*
* Copyright (c) 2011 Samara Technology Group, Inc
* Contributed by Philip Mucci <phil.mucci@@samaratechnologygroup.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <sys/types.h>
#include <string.h>
#include <stdlib.h>
#include "pfmlib_priv.h"
#include "pfmlib_mips_priv.h"
#include "pfmlib_perf_event_priv.h"
int
pfm_mips_get_perf_encoding(void *this, pfmlib_event_desc_t *e)
{
struct perf_event_attr *attr = e->os_data;
int ret;
ret = pfm_mips_get_encoding(this, e);
if (ret != PFM_SUCCESS)
return ret;
if (e->count != 2) {
DPRINT("unexpected encoding count=%d\n", e->count);
return PFM_ERR_INVAL;
}
attr->type = PERF_TYPE_RAW;
/*
* priv levels are ignored because they are managed
* directly through perf excl_*.
*/
attr->config = e->codes[0] >> 5;
/*
* codes[1] contains counter mask supported by the event.
* Events support either odd or even indexed counters
* except for cycles (code = 0) and instructions (code =1)
* which work on all counters.
*
* The kernel expects bit 7 of config to indicate whether
* the event works only on odd-indexed counters
*/
if ((e->codes[1] & 0x2) && attr->config > 1)
attr->config |= 1ULL << 7;
return PFM_SUCCESS;
}
void
pfm_mips_perf_validate_pattrs(void *this, pfmlib_event_desc_t *e)
{
int i, compact;
for (i = 0; i < e->npattrs; i++) {
compact = 0;
/* umasks never conflict */
if (e->pattrs[i].type == PFM_ATTR_UMASK)
continue;
/*
* remove PMU-provided attributes which are either
* not accessible under perf_events or fully controlled
* by perf_events, e.g., priv levels filters
*/
if (e->pattrs[i].ctrl == PFM_ATTR_CTRL_PMU) {
/*
* with perf_event, priv levels under full
* control of perf_event.
*/
if ( e->pattrs[i].idx == MIPS_ATTR_K
||e->pattrs[i].idx == MIPS_ATTR_U
||e->pattrs[i].idx == MIPS_ATTR_S
||e->pattrs[i].idx == MIPS_ATTR_E)
compact = 1;
}
/*
* remove perf_event generic attributes not supported
* by MIPS
*/
if (e->pattrs[i].ctrl == PFM_ATTR_CTRL_PERF_EVENT) {
/* no precise sampling on MIPS */
if (e->pattrs[i].idx == PERF_ATTR_PR)
compact = 1;
}
if (compact) {
pfmlib_compact_pattrs(e, i);
i--;
}
}
}