cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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coresight-cfg-afdo.c (3750B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright(C) 2020 Linaro Limited. All rights reserved.
      4 * Author: Mike Leach <mike.leach@linaro.org>
      5 */
      6
      7#include "coresight-config.h"
      8
      9/* ETMv4 includes and features */
     10#if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X)
     11#include "coresight-etm4x-cfg.h"
     12
     13/* preload configurations and features */
     14
     15/* preload in features for ETMv4 */
     16
     17/* strobe feature */
     18static struct cscfg_parameter_desc strobe_params[] = {
     19	{
     20		.name = "window",
     21		.value = 5000,
     22	},
     23	{
     24		.name = "period",
     25		.value = 10000,
     26	},
     27};
     28
     29static struct cscfg_regval_desc strobe_regs[] = {
     30	/* resource selectors */
     31	{
     32		.type = CS_CFG_REG_TYPE_RESOURCE,
     33		.offset = TRCRSCTLRn(2),
     34		.hw_info = ETM4_CFG_RES_SEL,
     35		.val32 = 0x20001,
     36	},
     37	{
     38		.type = CS_CFG_REG_TYPE_RESOURCE,
     39		.offset = TRCRSCTLRn(3),
     40		.hw_info = ETM4_CFG_RES_SEQ,
     41		.val32 = 0x20002,
     42	},
     43	/* strobe window counter 0 - reload from param 0 */
     44	{
     45		.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_SAVE,
     46		.offset = TRCCNTVRn(0),
     47		.hw_info = ETM4_CFG_RES_CTR,
     48	},
     49	{
     50		.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_PARAM,
     51		.offset = TRCCNTRLDVRn(0),
     52		.hw_info = ETM4_CFG_RES_CTR,
     53		.val32 = 0,
     54	},
     55	{
     56		.type = CS_CFG_REG_TYPE_RESOURCE,
     57		.offset = TRCCNTCTLRn(0),
     58		.hw_info = ETM4_CFG_RES_CTR,
     59		.val32 = 0x10001,
     60	},
     61	/* strobe period counter 1 - reload from param 1 */
     62	{
     63		.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_SAVE,
     64		.offset = TRCCNTVRn(1),
     65		.hw_info = ETM4_CFG_RES_CTR,
     66	},
     67	{
     68		.type = CS_CFG_REG_TYPE_RESOURCE | CS_CFG_REG_TYPE_VAL_PARAM,
     69		.offset = TRCCNTRLDVRn(1),
     70		.hw_info = ETM4_CFG_RES_CTR,
     71		.val32 = 1,
     72	},
     73	{
     74		.type = CS_CFG_REG_TYPE_RESOURCE,
     75		.offset = TRCCNTCTLRn(1),
     76		.hw_info = ETM4_CFG_RES_CTR,
     77		.val32 = 0x8102,
     78	},
     79	/* sequencer */
     80	{
     81		.type = CS_CFG_REG_TYPE_RESOURCE,
     82		.offset = TRCSEQEVRn(0),
     83		.hw_info = ETM4_CFG_RES_SEQ,
     84		.val32 = 0x0081,
     85	},
     86	{
     87		.type = CS_CFG_REG_TYPE_RESOURCE,
     88		.offset = TRCSEQEVRn(1),
     89		.hw_info = ETM4_CFG_RES_SEQ,
     90		.val32 = 0x0000,
     91	},
     92	/* view-inst */
     93	{
     94		.type = CS_CFG_REG_TYPE_STD | CS_CFG_REG_TYPE_VAL_MASK,
     95		.offset = TRCVICTLR,
     96		.val32 = 0x0003,
     97		.mask32 = 0x0003,
     98	},
     99	/* end of regs */
    100};
    101
    102struct cscfg_feature_desc strobe_etm4x = {
    103	.name = "strobing",
    104	.description = "Generate periodic trace capture windows.\n"
    105		       "parameter \'window\': a number of CPU cycles (W)\n"
    106		       "parameter \'period\': trace enabled for W cycles every period x W cycles\n",
    107	.match_flags = CS_CFG_MATCH_CLASS_SRC_ETM4,
    108	.nr_params = ARRAY_SIZE(strobe_params),
    109	.params_desc = strobe_params,
    110	.nr_regs = ARRAY_SIZE(strobe_regs),
    111	.regs_desc = strobe_regs,
    112};
    113
    114/* create an autofdo configuration */
    115
    116/* we will provide 9 sets of preset parameter values */
    117#define AFDO_NR_PRESETS	9
    118/* the total number of parameters in used features */
    119#define AFDO_NR_PARAMS	ARRAY_SIZE(strobe_params)
    120
    121static const char *afdo_ref_names[] = {
    122	"strobing",
    123};
    124
    125/*
    126 * set of presets leaves strobing window constant while varying period to allow
    127 * experimentation with mark / space ratios for various workloads
    128 */
    129static u64 afdo_presets[AFDO_NR_PRESETS][AFDO_NR_PARAMS] = {
    130	{ 5000, 2 },
    131	{ 5000, 4 },
    132	{ 5000, 8 },
    133	{ 5000, 16 },
    134	{ 5000, 64 },
    135	{ 5000, 128 },
    136	{ 5000, 512 },
    137	{ 5000, 1024 },
    138	{ 5000, 4096 },
    139};
    140
    141struct cscfg_config_desc afdo_etm4x = {
    142	.name = "autofdo",
    143	.description = "Setup ETMs with strobing for autofdo\n"
    144	"Supplied presets allow experimentation with mark-space ratio for various loads\n",
    145	.nr_feat_refs = ARRAY_SIZE(afdo_ref_names),
    146	.feat_ref_names = afdo_ref_names,
    147	.nr_presets = AFDO_NR_PRESETS,
    148	.nr_total_params = AFDO_NR_PARAMS,
    149	.presets = &afdo_presets[0][0],
    150};
    151
    152/* end of ETM4x configurations */
    153#endif	/* IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X) */