drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * HiSilicon SLLC uncore Hardware event counters support
   4  *
   5  * Copyright (C) 2020 HiSilicon Limited
   6  * Author: Shaokun Zhang <zhangshaokun@hisilicon.com>
   7  *
   8  * This code is based on the uncore PMUs like arm-cci and arm-ccn.
   9  */
  10 #include <linux/acpi.h>
  11 #include <linux/cpuhotplug.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/irq.h>
  14 #include <linux/list.h>
  15 #include <linux/smp.h>
  16
  17 #include "hisi_uncore_pmu.h"
  18
  19 /* SLLC register definition */
  20 #define SLLC_INT_MASK                   0x0814
  21 #define SLLC_INT_STATUS                 0x0818
  22 #define SLLC_INT_CLEAR                  0x081c
  23 #define SLLC_PERF_CTRL                  0x1c00
  24 #define SLLC_SRCID_CTRL                 0x1c04
  25 #define SLLC_TGTID_CTRL                 0x1c08
  26 #define SLLC_EVENT_CTRL                 0x1c14
  27 #define SLLC_EVENT_TYPE0                0x1c18
  28 #define SLLC_VERSION                    0x1cf0
  29 #define SLLC_EVENT_CNT0_L               0x1d00
  30
  31 #define SLLC_EVTYPE_MASK                0xff
  32 #define SLLC_PERF_CTRL_EN               BIT(0)
  33 #define SLLC_FILT_EN                    BIT(1)
  34 #define SLLC_TRACETAG_EN                BIT(2)
  35 #define SLLC_SRCID_EN                   BIT(4)
  36 #define SLLC_SRCID_NONE                 0x0
  37 #define SLLC_TGTID_EN                   BIT(5)
  38 #define SLLC_TGTID_NONE                 0x0
  39 #define SLLC_TGTID_MIN_SHIFT            1
  40 #define SLLC_TGTID_MAX_SHIFT            12
  41 #define SLLC_SRCID_CMD_SHIFT            1
  42 #define SLLC_SRCID_MSK_SHIFT            12
  43 #define SLLC_NR_EVENTS                  0x80
  44
  45 HISI_PMU_EVENT_ATTR_EXTRACTOR(tgtid_min, config1, 10, 0);
  46 HISI_PMU_EVENT_ATTR_EXTRACTOR(tgtid_max, config1, 21, 11);
  47 HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid_cmd, config1, 32, 22);
  48 HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid_msk, config1, 43, 33);
  49 HISI_PMU_EVENT_ATTR_EXTRACTOR(tracetag_en, config1, 44, 44);
  50
  51 static bool tgtid_is_valid(u32 max, u32 min)
  52 {
  53         return max > 0 && max >= min;
  54 }
  55
  56 static void hisi_sllc_pmu_enable_tracetag(struct perf_event *event)
  57 {
  58         struct hisi_pmu *sllc_pmu = to_hisi_pmu(event->pmu);
  59         u32 tt_en = hisi_get_tracetag_en(event);
  60
  61         if (tt_en) {
  62                 u32 val;
  63
  64                 val = readl(sllc_pmu->base + SLLC_PERF_CTRL);
  65                 val |= SLLC_TRACETAG_EN | SLLC_FILT_EN;
  66                 writel(val, sllc_pmu->base + SLLC_PERF_CTRL);
  67         }
  68 }
  69
  70 static void hisi_sllc_pmu_disable_tracetag(struct perf_event *event)
  71 {
  72         struct hisi_pmu *sllc_pmu = to_hisi_pmu(event->pmu);
  73         u32 tt_en = hisi_get_tracetag_en(event);
  74
  75         if (tt_en) {
  76                 u32 val;
  77
  78                 val = readl(sllc_pmu->base + SLLC_PERF_CTRL);
  79                 val &= ~(SLLC_TRACETAG_EN | SLLC_FILT_EN);
  80                 writel(val, sllc_pmu->base + SLLC_PERF_CTRL);
  81         }
  82 }
  83
  84 static void hisi_sllc_pmu_config_tgtid(struct perf_event *event)
  85 {
  86         struct hisi_pmu *sllc_pmu = to_hisi_pmu(event->pmu);
  87         u32 min = hisi_get_tgtid_min(event);
  88         u32 max = hisi_get_tgtid_max(event);
  89
  90         if (tgtid_is_valid(max, min)) {
  91                 u32 val = (max << SLLC_TGTID_MAX_SHIFT) | (min << SLLC_TGTID_MIN_SHIFT);
  92
  93                 writel(val, sllc_pmu->base + SLLC_TGTID_CTRL);
  94                 /* Enable the tgtid */
  95                 val = readl(sllc_pmu->base + SLLC_PERF_CTRL);
  96                 val |= SLLC_TGTID_EN | SLLC_FILT_EN;
  97                 writel(val, sllc_pmu->base + SLLC_PERF_CTRL);
  98         }
  99 }
 100
 101 static void hisi_sllc_pmu_clear_tgtid(struct perf_event *event)
 102 {
 103         struct hisi_pmu *sllc_pmu = to_hisi_pmu(event->pmu);
 104         u32 min = hisi_get_tgtid_min(event);
 105         u32 max = hisi_get_tgtid_max(event);
 106
 107         if (tgtid_is_valid(max, min)) {
 108                 u32 val;
 109
 110                 writel(SLLC_TGTID_NONE, sllc_pmu->base + SLLC_TGTID_CTRL);
 111                 /* Disable the tgtid */
 112                 val = readl(sllc_pmu->base + SLLC_PERF_CTRL);
 113                 val &= ~(SLLC_TGTID_EN | SLLC_FILT_EN);
 114                 writel(val, sllc_pmu->base + SLLC_PERF_CTRL);
 115         }
 116 }
 117
 118 static void hisi_sllc_pmu_config_srcid(struct perf_event *event)
 119 {
 120         struct hisi_pmu *sllc_pmu = to_hisi_pmu(event->pmu);
 121         u32 cmd = hisi_get_srcid_cmd(event);
 122
 123         if (cmd) {
 124                 u32 val, msk;
 125
 126                 msk = hisi_get_srcid_msk(event);
 127                 val = (cmd << SLLC_SRCID_CMD_SHIFT) | (msk << SLLC_SRCID_MSK_SHIFT);
 128                 writel(val, sllc_pmu->base + SLLC_SRCID_CTRL);
 129                 /* Enable the srcid */
 130                 val = readl(sllc_pmu->base + SLLC_PERF_CTRL);
 131                 val |= SLLC_SRCID_EN | SLLC_FILT_EN;
 132                 writel(val, sllc_pmu->base + SLLC_PERF_CTRL);
 133         }
 134 }
 135
 136 static void hisi_sllc_pmu_clear_srcid(struct perf_event *event)
 137 {
 138         struct hisi_pmu *sllc_pmu = to_hisi_pmu(event->pmu);
 139         u32 cmd = hisi_get_srcid_cmd(event);
 140
 141         if (cmd) {
 142                 u32 val;
 143
 144                 writel(SLLC_SRCID_NONE, sllc_pmu->base + SLLC_SRCID_CTRL);
 145                 /* Disable the srcid */
 146                 val = readl(sllc_pmu->base + SLLC_PERF_CTRL);
 147                 val &= ~(SLLC_SRCID_EN | SLLC_FILT_EN);
 148                 writel(val, sllc_pmu->base + SLLC_PERF_CTRL);
 149         }
 150 }
 151
 152 static void hisi_sllc_pmu_enable_filter(struct perf_event *event)
 153 {
 154         if (event->attr.config1 != 0x0) {
 155                 hisi_sllc_pmu_enable_tracetag(event);
 156                 hisi_sllc_pmu_config_srcid(event);
 157                 hisi_sllc_pmu_config_tgtid(event);
 158         }
 159 }
 160
 161 static void hisi_sllc_pmu_clear_filter(struct perf_event *event)
 162 {
 163         if (event->attr.config1 != 0x0) {
 164                 hisi_sllc_pmu_disable_tracetag(event);
 165                 hisi_sllc_pmu_clear_srcid(event);
 166                 hisi_sllc_pmu_clear_tgtid(event);
 167         }
 168 }
 169
 170 static u32 hisi_sllc_pmu_get_counter_offset(int idx)
 171 {
 172         return (SLLC_EVENT_CNT0_L + idx * 8);
 173 }
 174
 175 static u64 hisi_sllc_pmu_read_counter(struct hisi_pmu *sllc_pmu,
 176                                       struct hw_perf_event *hwc)
 177 {
 178         return readq(sllc_pmu->base +
 179                      hisi_sllc_pmu_get_counter_offset(hwc->idx));
 180 }
 181
 182 static void hisi_sllc_pmu_write_counter(struct hisi_pmu *sllc_pmu,
 183                                         struct hw_perf_event *hwc, u64 val)
 184 {
 185         writeq(val, sllc_pmu->base +
 186                hisi_sllc_pmu_get_counter_offset(hwc->idx));
 187 }
 188
 189 static void hisi_sllc_pmu_write_evtype(struct hisi_pmu *sllc_pmu, int idx,
 190                                        u32 type)
 191 {
 192         u32 reg, reg_idx, shift, val;
 193
 194         /*
 195          * Select the appropriate event select register(SLLC_EVENT_TYPE0/1).
 196          * There are 2 event select registers for the 8 hardware counters.
 197          * Event code is 8-bits and for the former 4 hardware counters,
 198          * SLLC_EVENT_TYPE0 is chosen. For the latter 4 hardware counters,
 199          * SLLC_EVENT_TYPE1 is chosen.
 200          */
 201         reg = SLLC_EVENT_TYPE0 + (idx / 4) * 4;
 202         reg_idx = idx % 4;
 203         shift = 8 * reg_idx;
 204
 205         /* Write event code to SLLC_EVENT_TYPEx Register */
 206         val = readl(sllc_pmu->base + reg);
 207         val &= ~(SLLC_EVTYPE_MASK << shift);
 208         val |= (type << shift);
 209         writel(val, sllc_pmu->base + reg);
 210 }
 211
 212 static void hisi_sllc_pmu_start_counters(struct hisi_pmu *sllc_pmu)
 213 {
 214         u32 val;
 215
 216         val = readl(sllc_pmu->base + SLLC_PERF_CTRL);
 217         val |= SLLC_PERF_CTRL_EN;
 218         writel(val, sllc_pmu->base + SLLC_PERF_CTRL);
 219 }
 220
 221 static void hisi_sllc_pmu_stop_counters(struct hisi_pmu *sllc_pmu)
 222 {
 223         u32 val;
 224
 225         val = readl(sllc_pmu->base + SLLC_PERF_CTRL);
 226         val &= ~(SLLC_PERF_CTRL_EN);
 227         writel(val, sllc_pmu->base + SLLC_PERF_CTRL);
 228 }
 229
 230 static void hisi_sllc_pmu_enable_counter(struct hisi_pmu *sllc_pmu,
 231                                          struct hw_perf_event *hwc)
 232 {
 233         u32 val;
 234
 235         val = readl(sllc_pmu->base + SLLC_EVENT_CTRL);
 236         val |= 1 << hwc->idx;
 237         writel(val, sllc_pmu->base + SLLC_EVENT_CTRL);
 238 }
 239
 240 static void hisi_sllc_pmu_disable_counter(struct hisi_pmu *sllc_pmu,
 241                                           struct hw_perf_event *hwc)
 242 {
 243         u32 val;
 244
 245         val = readl(sllc_pmu->base + SLLC_EVENT_CTRL);
 246         val &= ~(1 << hwc->idx);
 247         writel(val, sllc_pmu->base + SLLC_EVENT_CTRL);
 248 }
 249
 250 static void hisi_sllc_pmu_enable_counter_int(struct hisi_pmu *sllc_pmu,
 251                                              struct hw_perf_event *hwc)
 252 {
 253         u32 val;
 254
 255         val = readl(sllc_pmu->base + SLLC_INT_MASK);
 256         /* Write 0 to enable interrupt */
 257         val &= ~(1 << hwc->idx);
 258         writel(val, sllc_pmu->base + SLLC_INT_MASK);
 259 }
 260
 261 static void hisi_sllc_pmu_disable_counter_int(struct hisi_pmu *sllc_pmu,
 262                                               struct hw_perf_event *hwc)
 263 {
 264         u32 val;
 265
 266         val = readl(sllc_pmu->base + SLLC_INT_MASK);
 267         /* Write 1 to mask interrupt */
 268         val |= 1 << hwc->idx;
 269         writel(val, sllc_pmu->base + SLLC_INT_MASK);
 270 }
 271
 272 static u32 hisi_sllc_pmu_get_int_status(struct hisi_pmu *sllc_pmu)
 273 {
 274         return readl(sllc_pmu->base + SLLC_INT_STATUS);
 275 }
 276
 277 static void hisi_sllc_pmu_clear_int_status(struct hisi_pmu *sllc_pmu, int idx)
 278 {
 279         writel(1 << idx, sllc_pmu->base + SLLC_INT_CLEAR);
 280 }
 281
 282 static const struct acpi_device_id hisi_sllc_pmu_acpi_match[] = {
 283         { "HISI0263", },
 284         {}
 285 };
 286 MODULE_DEVICE_TABLE(acpi, hisi_sllc_pmu_acpi_match);
 287
 288 static int hisi_sllc_pmu_init_data(struct platform_device *pdev,
 289                                    struct hisi_pmu *sllc_pmu)
 290 {
 291         /*
 292          * Use the SCCL_ID and the index ID to identify the SLLC PMU,
 293          * while SCCL_ID is from MPIDR_EL1 by CPU.
 294          */
 295         if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
 296                                      &sllc_pmu->sccl_id)) {
 297                 dev_err(&pdev->dev, "Cannot read sccl-id!\n");
 298                 return -EINVAL;
 299         }
 300
 301         if (device_property_read_u32(&pdev->dev, "hisilicon,idx-id",
 302                                      &sllc_pmu->index_id)) {
 303                 dev_err(&pdev->dev, "Cannot read idx-id!\n");
 304                 return -EINVAL;
 305         }
 306
 307         /* SLLC PMUs only share the same SCCL */
 308         sllc_pmu->ccl_id = -1;
 309
 310         sllc_pmu->base = devm_platform_ioremap_resource(pdev, 0);
 311         if (IS_ERR(sllc_pmu->base)) {
 312                 dev_err(&pdev->dev, "ioremap failed for sllc_pmu resource.\n");
 313                 return PTR_ERR(sllc_pmu->base);
 314         }
 315
 316         sllc_pmu->identifier = readl(sllc_pmu->base + SLLC_VERSION);
 317
 318         return 0;
 319 }
 320
 321 static struct attribute *hisi_sllc_pmu_v2_format_attr[] = {
 322         HISI_PMU_FORMAT_ATTR(event, "config:0-7"),
 323         HISI_PMU_FORMAT_ATTR(tgtid_min, "config1:0-10"),
 324         HISI_PMU_FORMAT_ATTR(tgtid_max, "config1:11-21"),
 325         HISI_PMU_FORMAT_ATTR(srcid_cmd, "config1:22-32"),
 326         HISI_PMU_FORMAT_ATTR(srcid_msk, "config1:33-43"),
 327         HISI_PMU_FORMAT_ATTR(tracetag_en, "config1:44"),
 328         NULL
 329 };
 330
 331 static const struct attribute_group hisi_sllc_pmu_v2_format_group = {
 332         .name = "format",
 333         .attrs = hisi_sllc_pmu_v2_format_attr,
 334 };
 335
 336 static struct attribute *hisi_sllc_pmu_v2_events_attr[] = {
 337         HISI_PMU_EVENT_ATTR(rx_req,             0x30),
 338         HISI_PMU_EVENT_ATTR(rx_data,            0x31),
 339         HISI_PMU_EVENT_ATTR(tx_req,             0x34),
 340         HISI_PMU_EVENT_ATTR(tx_data,            0x35),
 341         HISI_PMU_EVENT_ATTR(cycles,             0x09),
 342         NULL
 343 };
 344
 345 static const struct attribute_group hisi_sllc_pmu_v2_events_group = {
 346         .name = "events",
 347         .attrs = hisi_sllc_pmu_v2_events_attr,
 348 };
 349
 350 static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
 351
 352 static struct attribute *hisi_sllc_pmu_cpumask_attrs[] = {
 353         &dev_attr_cpumask.attr,
 354         NULL
 355 };
 356
 357 static const struct attribute_group hisi_sllc_pmu_cpumask_attr_group = {
 358         .attrs = hisi_sllc_pmu_cpumask_attrs,
 359 };
 360
 361 static struct device_attribute hisi_sllc_pmu_identifier_attr =
 362         __ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL);
 363
 364 static struct attribute *hisi_sllc_pmu_identifier_attrs[] = {
 365         &hisi_sllc_pmu_identifier_attr.attr,
 366         NULL
 367 };
 368
 369 static const struct attribute_group hisi_sllc_pmu_identifier_group = {
 370         .attrs = hisi_sllc_pmu_identifier_attrs,
 371 };
 372
 373 static const struct attribute_group *hisi_sllc_pmu_v2_attr_groups[] = {
 374         &hisi_sllc_pmu_v2_format_group,
 375         &hisi_sllc_pmu_v2_events_group,
 376         &hisi_sllc_pmu_cpumask_attr_group,
 377         &hisi_sllc_pmu_identifier_group,
 378         NULL
 379 };
 380
 381 static const struct hisi_uncore_ops hisi_uncore_sllc_ops = {
 382         .write_evtype           = hisi_sllc_pmu_write_evtype,
 383         .get_event_idx          = hisi_uncore_pmu_get_event_idx,
 384         .start_counters         = hisi_sllc_pmu_start_counters,
 385         .stop_counters          = hisi_sllc_pmu_stop_counters,
 386         .enable_counter         = hisi_sllc_pmu_enable_counter,
 387         .disable_counter        = hisi_sllc_pmu_disable_counter,
 388         .enable_counter_int     = hisi_sllc_pmu_enable_counter_int,
 389         .disable_counter_int    = hisi_sllc_pmu_disable_counter_int,
 390         .write_counter          = hisi_sllc_pmu_write_counter,
 391         .read_counter           = hisi_sllc_pmu_read_counter,
 392         .get_int_status         = hisi_sllc_pmu_get_int_status,
 393         .clear_int_status       = hisi_sllc_pmu_clear_int_status,
 394         .enable_filter          = hisi_sllc_pmu_enable_filter,
 395         .disable_filter         = hisi_sllc_pmu_clear_filter,
 396 };
 397
 398 static int hisi_sllc_pmu_dev_probe(struct platform_device *pdev,
 399                                    struct hisi_pmu *sllc_pmu)
 400 {
 401         int ret;
 402
 403         ret = hisi_sllc_pmu_init_data(pdev, sllc_pmu);
 404         if (ret)
 405                 return ret;
 406
 407         ret = hisi_uncore_pmu_init_irq(sllc_pmu, pdev);
 408         if (ret)
 409                 return ret;
 410
 411         sllc_pmu->pmu_events.attr_groups = hisi_sllc_pmu_v2_attr_groups;
 412         sllc_pmu->ops = &hisi_uncore_sllc_ops;
 413         sllc_pmu->check_event = SLLC_NR_EVENTS;
 414         sllc_pmu->counter_bits = 64;
 415         sllc_pmu->num_counters = 8;
 416         sllc_pmu->dev = &pdev->dev;
 417         sllc_pmu->on_cpu = -1;
 418
 419         return 0;
 420 }
 421
 422 static int hisi_sllc_pmu_probe(struct platform_device *pdev)
 423 {
 424         struct hisi_pmu *sllc_pmu;
 425         char *name;
 426         int ret;
 427
 428         sllc_pmu = devm_kzalloc(&pdev->dev, sizeof(*sllc_pmu), GFP_KERNEL);
 429         if (!sllc_pmu)
 430                 return -ENOMEM;
 431
 432         ret = hisi_sllc_pmu_dev_probe(pdev, sllc_pmu);
 433         if (ret)
 434                 return ret;
 435
 436         name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_sllc%u",
 437                               sllc_pmu->sccl_id, sllc_pmu->index_id);
 438         if (!name)
 439                 return -ENOMEM;
 440
 441         ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE,
 442                                        &sllc_pmu->node);
 443         if (ret) {
 444                 dev_err(&pdev->dev, "Error %d registering hotplug\n", ret);
 445                 return ret;
 446         }
 447
 448         sllc_pmu->pmu = (struct pmu) {
 449                 .module         = THIS_MODULE,
 450                 .task_ctx_nr    = perf_invalid_context,
 451                 .event_init     = hisi_uncore_pmu_event_init,
 452                 .pmu_enable     = hisi_uncore_pmu_enable,
 453                 .pmu_disable    = hisi_uncore_pmu_disable,
 454                 .add            = hisi_uncore_pmu_add,
 455                 .del            = hisi_uncore_pmu_del,
 456                 .start          = hisi_uncore_pmu_start,
 457                 .stop           = hisi_uncore_pmu_stop,
 458                 .read           = hisi_uncore_pmu_read,
 459                 .attr_groups    = sllc_pmu->pmu_events.attr_groups,
 460                 .capabilities   = PERF_PMU_CAP_NO_EXCLUDE,
 461         };
 462
 463         ret = perf_pmu_register(&sllc_pmu->pmu, name, -1);
 464         if (ret) {
 465                 dev_err(sllc_pmu->dev, "PMU register failed, ret = %d\n", ret);
 466                 cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE,
 467                                             &sllc_pmu->node);
 468                 return ret;
 469         }
 470
 471         platform_set_drvdata(pdev, sllc_pmu);
 472
 473         return ret;
 474 }
 475
 476 static int hisi_sllc_pmu_remove(struct platform_device *pdev)
 477 {
 478         struct hisi_pmu *sllc_pmu = platform_get_drvdata(pdev);
 479
 480         perf_pmu_unregister(&sllc_pmu->pmu);
 481         cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE,
 482                                             &sllc_pmu->node);
 483         return 0;
 484 }
 485
 486 static struct platform_driver hisi_sllc_pmu_driver = {
 487         .driver = {
 488                 .name = "hisi_sllc_pmu",
 489                 .acpi_match_table = hisi_sllc_pmu_acpi_match,
 490                 .suppress_bind_attrs = true,
 491         },
 492         .probe = hisi_sllc_pmu_probe,
 493         .remove = hisi_sllc_pmu_remove,
 494 };
 495
 496 static int __init hisi_sllc_pmu_module_init(void)
 497 {
 498         int ret;
 499
 500         ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE,
 501                                       "AP_PERF_ARM_HISI_SLLC_ONLINE",
 502                                       hisi_uncore_pmu_online_cpu,
 503                                       hisi_uncore_pmu_offline_cpu);
 504         if (ret) {
 505                 pr_err("SLLC PMU: cpuhp state setup failed, ret = %d\n", ret);
 506                 return ret;
 507         }
 508
 509         ret = platform_driver_register(&hisi_sllc_pmu_driver);
 510         if (ret)
 511                 cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE);
 512
 513         return ret;
 514 }
 515 module_init(hisi_sllc_pmu_module_init);
 516
 517 static void __exit hisi_sllc_pmu_module_exit(void)
 518 {
 519         platform_driver_unregister(&hisi_sllc_pmu_driver);
 520         cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE);
 521 }
 522 module_exit(hisi_sllc_pmu_module_exit);
 523
 524 MODULE_DESCRIPTION("HiSilicon SLLC uncore PMU driver");
 525 MODULE_LICENSE("GPL v2");
 526 MODULE_AUTHOR("Shaokun Zhang <zhangshaokun@hisilicon.com>");
 527 MODULE_AUTHOR("Qi Liu <liuqi115@huawei.com>");