mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-16 07:24:39 +08:00
7fdc9bb2ce
Preload set of configurations. This patch creates a small set of preloaded configurations and features that are available immediately after coresight has been initialised. The current set provides a strobing feature for ETMv4, that creates a periodic sampling of trace by switching trace generation on and off using counters in the ETM. A configuration called "autofdo" is also provided that uses the 'strobing' feature and provides a couple of preset values, selectable on the perf command line. Link: https://lore.kernel.org/r/20210723165444.1048-9-mike.leach@linaro.org Signed-off-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Link: https://lore.kernel.org/r/20210818194022.379573-9-mathieu.poirier@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
154 lines
3.7 KiB
C
154 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright(C) 2020 Linaro Limited. All rights reserved.
|
|
* Author: Mike Leach <mike.leach@linaro.org>
|
|
*/
|
|
|
|
#include "coresight-config.h"
|
|
|
|
/* ETMv4 includes and features */
|
|
#if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X)
|
|
#include "coresight-etm4x-cfg.h"
|
|
|
|
/* preload configurations and features */
|
|
|
|
/* preload in features for ETMv4 */
|
|
|
|
/* strobe feature */
|
|
static struct cscfg_parameter_desc strobe_params[] = {
|
|
{
|
|
.name = "window",
|
|
.value = 5000,
|
|
},
|
|
{
|
|
.name = "period",
|
|
.value = 10000,
|
|
},
|
|
};
|
|
|
|
static struct cscfg_regval_desc strobe_regs[] = {
|
|
/* resource selectors */
|
|
{
|
|
.type = CS_CFG_REG_TYPE_RESOURCE,
|
|
.offset = TRCRSCTLRn(2),
|
|
.hw_info = ETM4_CFG_RES_SEL,
|
|
.val32 = 0x20001,
|
|
},
|
|
{
|
|
.type = CS_CFG_REG_TYPE_RESOURCE,
|
|
.offset = TRCRSCTLRn(3),
|
|
.hw_info = ETM4_CFG_RES_SEQ,
|
|
.val32 = 0x20002,
|
|
},
|
|
/* strobe window counter 0 - reload from param 0 */
|
|
{
|
|
.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_SAVE,
|
|
.offset = TRCCNTVRn(0),
|
|
.hw_info = ETM4_CFG_RES_CTR,
|
|
},
|
|
{
|
|
.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_PARAM,
|
|
.offset = TRCCNTRLDVRn(0),
|
|
.hw_info = ETM4_CFG_RES_CTR,
|
|
.val32 = 0,
|
|
},
|
|
{
|
|
.type = CS_CFG_REG_TYPE_RESOURCE,
|
|
.offset = TRCCNTCTLRn(0),
|
|
.hw_info = ETM4_CFG_RES_CTR,
|
|
.val32 = 0x10001,
|
|
},
|
|
/* strobe period counter 1 - reload from param 1 */
|
|
{
|
|
.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_SAVE,
|
|
.offset = TRCCNTVRn(1),
|
|
.hw_info = ETM4_CFG_RES_CTR,
|
|
},
|
|
{
|
|
.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_PARAM,
|
|
.offset = TRCCNTRLDVRn(1),
|
|
.hw_info = ETM4_CFG_RES_CTR,
|
|
.val32 = 1,
|
|
},
|
|
{
|
|
.type = CS_CFG_REG_TYPE_RESOURCE,
|
|
.offset = TRCCNTCTLRn(1),
|
|
.hw_info = ETM4_CFG_RES_CTR,
|
|
.val32 = 0x8102,
|
|
},
|
|
/* sequencer */
|
|
{
|
|
.type = CS_CFG_REG_TYPE_RESOURCE,
|
|
.offset = TRCSEQEVRn(0),
|
|
.hw_info = ETM4_CFG_RES_SEQ,
|
|
.val32 = 0x0081,
|
|
},
|
|
{
|
|
.type = CS_CFG_REG_TYPE_RESOURCE,
|
|
.offset = TRCSEQEVRn(1),
|
|
.hw_info = ETM4_CFG_RES_SEQ,
|
|
.val32 = 0x0000,
|
|
},
|
|
/* view-inst */
|
|
{
|
|
.type = CS_CFG_REG_TYPE_STD | CS_CFG_REG_TYPE_VAL_MASK,
|
|
.offset = TRCVICTLR,
|
|
.val32 = 0x0003,
|
|
.mask32 = 0x0003,
|
|
},
|
|
/* end of regs */
|
|
};
|
|
|
|
struct cscfg_feature_desc strobe_etm4x = {
|
|
.name = "strobing",
|
|
.description = "Generate periodic trace capture windows.\n"
|
|
"parameter \'window\': a number of CPU cycles (W)\n"
|
|
"parameter \'period\': trace enabled for W cycles every period x W cycles\n",
|
|
.match_flags = CS_CFG_MATCH_CLASS_SRC_ETM4,
|
|
.nr_params = ARRAY_SIZE(strobe_params),
|
|
.params_desc = strobe_params,
|
|
.nr_regs = ARRAY_SIZE(strobe_regs),
|
|
.regs_desc = strobe_regs,
|
|
};
|
|
|
|
/* create an autofdo configuration */
|
|
|
|
/* we will provide 9 sets of preset parameter values */
|
|
#define AFDO_NR_PRESETS 9
|
|
/* the total number of parameters in used features */
|
|
#define AFDO_NR_PARAMS ARRAY_SIZE(strobe_params)
|
|
|
|
static const char *afdo_ref_names[] = {
|
|
"strobing",
|
|
};
|
|
|
|
/*
|
|
* set of presets leaves strobing window constant while varying period to allow
|
|
* experimentation with mark / space ratios for various workloads
|
|
*/
|
|
static u64 afdo_presets[AFDO_NR_PRESETS][AFDO_NR_PARAMS] = {
|
|
{ 5000, 2 },
|
|
{ 5000, 4 },
|
|
{ 5000, 8 },
|
|
{ 5000, 16 },
|
|
{ 5000, 64 },
|
|
{ 5000, 128 },
|
|
{ 5000, 512 },
|
|
{ 5000, 1024 },
|
|
{ 5000, 4096 },
|
|
};
|
|
|
|
struct cscfg_config_desc afdo_etm4x = {
|
|
.name = "autofdo",
|
|
.description = "Setup ETMs with strobing for autofdo\n"
|
|
"Supplied presets allow experimentation with mark-space ratio for various loads\n",
|
|
.nr_feat_refs = ARRAY_SIZE(afdo_ref_names),
|
|
.feat_ref_names = afdo_ref_names,
|
|
.nr_presets = AFDO_NR_PRESETS,
|
|
.nr_total_params = AFDO_NR_PARAMS,
|
|
.presets = &afdo_presets[0][0],
|
|
};
|
|
|
|
/* end of ETM4x configurations */
|
|
#endif /* IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X) */
|