hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IC35SV -------------------------------- In the following patches, we would introduce many QoS configuration in order to enhance MPAM's capability for isolating interference and schedule shared resources. As a prerequisite patch, it introduces the resctrl_schema_fmt, an enumeration type that indicates the format in which resource configurations are issued by users. Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- arch/x86/kernel/cpu/resctrl/core.c | 4 ++ drivers/platform/mpam/mpam_resctrl.c | 70 ++++++++++++++++------------ fs/resctrl/ctrlmondata.c | 13 ++++-- fs/resctrl/rdtgroup.c | 13 ++++-- include/linux/resctrl.h | 13 +++++- 5 files changed, 74 insertions(+), 39 deletions(-) diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c index 6a5a5b43af27..3390c72c77ba 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -71,6 +71,7 @@ struct rdt_hw_resource rdt_resources_all[] = { .domains = domain_init(RDT_RESOURCE_L3), .format_str = "%d=%0*x", .fflags = RFTYPE_RES_CACHE, + .schema_fmt = RESCTRL_SCHEMA_BITMAP, }, .msr_base = MSR_IA32_L3_CBM_BASE, .msr_update = cat_wrmsr, @@ -84,6 +85,7 @@ struct rdt_hw_resource rdt_resources_all[] = { .domains = domain_init(RDT_RESOURCE_L2), .format_str = "%d=%0*x", .fflags = RFTYPE_RES_CACHE, + .schema_fmt = RESCTRL_SCHEMA_BITMAP, }, .msr_base = MSR_IA32_L2_CBM_BASE, .msr_update = cat_wrmsr, @@ -97,6 +99,7 @@ struct rdt_hw_resource rdt_resources_all[] = { .domains = domain_init(RDT_RESOURCE_MBA), .format_str = "%d=%*u", .fflags = RFTYPE_RES_MB, + .schema_fmt = RESCTRL_SCHEMA_RANGE, }, }, [RDT_RESOURCE_SMBA] = @@ -108,6 +111,7 @@ struct rdt_hw_resource rdt_resources_all[] = { .domains = domain_init(RDT_RESOURCE_SMBA), .format_str = "%d=%*u", .fflags = RFTYPE_RES_MB, + .schema_fmt = RESCTRL_SCHEMA_RANGE, }, }, }; diff --git a/drivers/platform/mpam/mpam_resctrl.c b/drivers/platform/mpam/mpam_resctrl.c index 7586c8ffbb88..5080271fdcaa 100644 --- a/drivers/platform/mpam/mpam_resctrl.c +++ b/drivers/platform/mpam/mpam_resctrl.c @@ -581,6 +581,9 @@ static u32 mbw_max_to_percent(u16 mbw_max, u8 wd) u8 bit; u32 divisor = 2, value = 0, precision = get_wd_precision(wd); + if (mbw_max == GENMASK(15, 15 - wd + 1)) + return MAX_MBA_BW; + for (bit = 15; bit; bit--) { if (mbw_max & BIT(bit)) value += MAX_MBA_BW * precision / divisor; @@ -610,6 +613,9 @@ static u16 percent_to_mbw_max(u32 pc, u8 wd) if (WARN_ON_ONCE(wd > 15)) return MAX_MBA_BW; + if (pc == MAX_MBA_BW) + return GENMASK(15, 15 - wd + 1); + pc *= precision; for (bit = 15; bit; bit--) { @@ -677,22 +683,25 @@ static void mpam_resctrl_pick_caches(void) if (mpam_has_feature(mpam_feat_msmon_csu, cprops)) update_rmid_limits(cache_size); - if (class->level == 2) { - res = &mpam_resctrl_exports[RDT_RESOURCE_L2]; - res->resctrl_res.name = "L2"; - } else { - res = &mpam_resctrl_exports[RDT_RESOURCE_L3]; - res->resctrl_res.name = "L3"; + if (has_cpor) { + if (class->level == 2) { + res = &mpam_resctrl_exports[RDT_RESOURCE_L2]; + res->resctrl_res.name = "L2"; + } else { + res = &mpam_resctrl_exports[RDT_RESOURCE_L3]; + res->resctrl_res.name = "L3"; + } + res->class = class; } - res->class = class; } srcu_read_unlock(&mpam_srcu, idx); } static void mpam_resctrl_pick_mba(void) { - struct mpam_class *class, *candidate_class = NULL; struct mpam_resctrl_res *res; + struct mpam_class *class; + bool has_mba; int idx; lockdep_assert_cpus_held(); @@ -701,6 +710,8 @@ static void mpam_resctrl_pick_mba(void) list_for_each_entry_rcu(class, &mpam_classes, classes_list) { struct mpam_props *cprops = &class->props; + has_mba = class_has_usable_mba(cprops); + if (class->level < 3) continue; @@ -710,21 +721,13 @@ static void mpam_resctrl_pick_mba(void) if (!cpumask_equal(&class->affinity, cpu_possible_mask)) continue; - /* - * mba_sc reads the mbm_local counter, and waggles the MBA controls. - * mbm_local is implicitly part of the L3, pick a resouce to be MBA - * that as close as possible to the L3. - */ - if (!candidate_class || class->level < candidate_class->level) - candidate_class = class; + if (has_mba) { + res = &mpam_resctrl_exports[RDT_RESOURCE_MBA]; + res->class = class; + res->resctrl_res.name = "MB"; + } } srcu_read_unlock(&mpam_srcu, idx); - - if (candidate_class) { - res = &mpam_resctrl_exports[RDT_RESOURCE_MBA]; - res->class = candidate_class; - res->resctrl_res.name = "MB"; - } } bool resctrl_arch_is_evt_configurable(enum resctrl_event_id evt) @@ -778,14 +781,15 @@ void resctrl_arch_reset_rmid_all(struct rdt_resource *r, struct rdt_domain *d) static int mpam_resctrl_resource_init(struct mpam_resctrl_res *res) { struct mpam_class *class = res->class; + struct mpam_props *cprops = &class->props; struct rdt_resource *r = &res->resctrl_res; bool has_mbwu = class_has_usable_mbwu(class); + bool has_csu = cache_has_usable_csu(class); /* Is this one of the two well-known caches? */ - if (res->resctrl_res.rid == RDT_RESOURCE_L2 || - res->resctrl_res.rid == RDT_RESOURCE_L3) { - bool has_csu = cache_has_usable_csu(class); - + switch (res->resctrl_res.rid) { + case RDT_RESOURCE_L2: + case RDT_RESOURCE_L3: /* TODO: Scaling is not yet supported */ r->cache.cbm_len = class->props.cpbm_wd; r->cache.arch_has_sparse_bitmasks = true; @@ -795,6 +799,7 @@ static int mpam_resctrl_resource_init(struct mpam_resctrl_res *res) /* TODO: kill these properties off as they are derivatives */ r->format_str = "%d=%0*x"; + r->schema_fmt = RESCTRL_SCHEMA_BITMAP; r->fflags = RFTYPE_RES_CACHE; r->default_ctrl = BIT_MASK(class->props.cpbm_wd) - 1; r->data_width = (class->props.cpbm_wd + 3) / 4; @@ -808,7 +813,7 @@ static int mpam_resctrl_resource_init(struct mpam_resctrl_res *res) */ r->cache.shareable_bits = r->default_ctrl; - if (mpam_has_feature(mpam_feat_cpor_part, &class->props)) { + if (mpam_has_feature(mpam_feat_cpor_part, cprops)) { r->alloc_capable = true; exposed_alloc_capable = true; } @@ -832,11 +837,12 @@ static int mpam_resctrl_resource_init(struct mpam_resctrl_res *res) class->level == 3) { r->mon_capable = true; } - } else if (res->resctrl_res.rid == RDT_RESOURCE_MBA) { - struct mpam_props *cprops = &class->props; + break; + case RDT_RESOURCE_MBA: /* TODO: kill these properties off as they are derivatives */ r->format_str = "%d=%0*u"; + r->schema_fmt = RESCTRL_SCHEMA_PERCENT; r->fflags = RFTYPE_RES_MB; r->default_ctrl = MAX_MBA_BW; r->data_width = 3; @@ -858,6 +864,10 @@ static int mpam_resctrl_resource_init(struct mpam_resctrl_res *res) mbm_total_class = class; r->mon_capable = true; } + break; + + default: + break; } if (r->mon_capable) { @@ -871,7 +881,7 @@ static int mpam_resctrl_resource_init(struct mpam_resctrl_res *res) * For mpam, each control group has its own pmg/rmid * space. */ - r->num_rmid = 1; + r->num_rmid = mpam_partid_max * mpam_pmg_max; } return 0; @@ -1027,6 +1037,8 @@ int resctrl_arch_update_one(struct rdt_resource *r, struct rdt_domain *d, if (!r->alloc_capable || partid >= resctrl_arch_get_num_closid(r)) return -EINVAL; + cfg = dom->comp->cfg[partid]; + switch (r->rid) { case RDT_RESOURCE_L2: case RDT_RESOURCE_L3: diff --git a/fs/resctrl/ctrlmondata.c b/fs/resctrl/ctrlmondata.c index 15df4334ff14..60b422eed2c8 100644 --- a/fs/resctrl/ctrlmondata.c +++ b/fs/resctrl/ctrlmondata.c @@ -45,20 +45,23 @@ static bool bw_validate(char *buf, unsigned long *data, struct rdt_resource *r) * Only linear delay values is supported for current Intel SKUs. */ if (!r->membw.delay_linear && r->membw.arch_needs_linear) { - rdt_last_cmd_puts("No support for non-linear MB domains\n"); + rdt_last_cmd_printf("No support for non-linear %s domains\n", + r->name); return false; } ret = kstrtoul(buf, 10, &bw); if (ret) { - rdt_last_cmd_printf("Non-decimal digit in MB value %s\n", buf); + rdt_last_cmd_printf("Non-decimal digit in %s value %s\n", + r->name, buf); return false; } if ((bw < r->membw.min_bw || bw > r->default_ctrl) && !is_mba_sc(r)) { - rdt_last_cmd_printf("MB value %ld out of range [%d,%d]\n", bw, - r->membw.min_bw, r->default_ctrl); + rdt_last_cmd_printf("%s value %ld out of range [%d,%d]\n", + r->name, bw, r->membw.min_bw, + r->default_ctrl); return false; } @@ -227,7 +230,7 @@ static int parse_cbm(struct rdt_parse_data *data, struct resctrl_schema *s, static ctrlval_parser_t *get_parser(struct rdt_resource *res) { - if (res->fflags & RFTYPE_RES_CACHE) + if (res->schema_fmt == RESCTRL_SCHEMA_BITMAP) return &parse_cbm; else return &parse_bw; diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c index 4b38a68cc0f3..ffb6b8930435 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -1679,11 +1679,11 @@ static int rdtgroup_size_show(struct kernfs_open_file *of, ctrl = resctrl_arch_get_config(r, d, closid, type); - if (r->rid == RDT_RESOURCE_MBA || - r->rid == RDT_RESOURCE_SMBA) - size = ctrl; - else + if (r->rid == RDT_RESOURCE_L3 || + r->rid == RDT_RESOURCE_L2) size = rdtgroup_cbm_to_size(r, d, ctrl); + else + size = ctrl; } seq_printf(s, "%d=%u", d->id, size); sep = true; @@ -2293,6 +2293,11 @@ static int rdtgroup_create_info_dir(struct kernfs_node *parent_kn) /* loop over enabled controls, these are all alloc_capable */ list_for_each_entry(s, &resctrl_schema_all, list) { r = s->res; + + /* Not supported yet */ + if (r->rid > RDT_RESOURCE_SMBA) + continue; + fflags = r->fflags | RFTYPE_CTRL_INFO; ret = rdtgroup_mkdir_info_resdir(s, s->name, fflags); if (ret) diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index 61ff7dd5d74c..9aa4e4ee0a67 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -177,6 +177,16 @@ struct resctrl_membw { u32 *mb_map; }; +/** + * enum resctrl_schema_fmt - The format user-space provides for a schema. + * @RESCTRL_SCHEMA_BITMAP: The schema is a bitmap in hex. + * @RESCTRL_SCHEMA_RANGE: The schema is a decimal number. + */ +enum resctrl_schema_fmt { + RESCTRL_SCHEMA_BITMAP, + RESCTRL_SCHEMA_RANGE, +}; + /** * struct rdt_resource - attributes of a resctrl resource * @rid: The index of the resource @@ -211,6 +221,7 @@ struct rdt_resource { struct list_head evt_list; unsigned long fflags; bool cdp_capable; + enum resctrl_schema_fmt schema_fmt; }; /* @@ -234,7 +245,7 @@ struct rdt_resource *resctrl_arch_get_resource(enum resctrl_res_level l); */ struct resctrl_schema { struct list_head list; - char name[8]; + char name[16]; enum resctrl_conf_type conf_type; struct rdt_resource *res; u32 num_closid; -- 2.25.1

hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IC35SV -------------------------------- Implement mbw_min/cmin feature for mata/cache msc, and provide MBMIN/LxMIN interface in schemata file for user. On some specific platforms, L3 implements the cmin feature, but L2 may not provide it, or vice versa. Therefore, it is necessary to separately determine whether the cache msc has implemented the corresponding feature. Before transmitting the cache MIN portion value to msc, need to check whether the CMIN setting from user space is validate or not. The same goes for MBMIN. It should be noted that the new configuration value is in decimal form instead of hexadecimal, so here reuse the parse_bw() to analysis input value for cache msc. Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- drivers/platform/mpam/mpam_devices.c | 26 +++++-- drivers/platform/mpam/mpam_internal.h | 4 + drivers/platform/mpam/mpam_resctrl.c | 102 ++++++++++++++++++++++++-- include/linux/resctrl_types.h | 3 + 4 files changed, 123 insertions(+), 12 deletions(-) diff --git a/drivers/platform/mpam/mpam_devices.c b/drivers/platform/mpam/mpam_devices.c index 9e9584bb6a17..81645f19180b 100644 --- a/drivers/platform/mpam/mpam_devices.c +++ b/drivers/platform/mpam/mpam_devices.c @@ -581,9 +581,14 @@ static void mpam_ris_hw_probe(struct mpam_msc_ris *ris) u32 ccap_features = mpam_read_partsel_reg(msc, CCAP_IDR); props->cmax_wd = FIELD_GET(MPAMF_CCAP_IDR_CMAX_WD, ccap_features); - if (props->cmax_wd && - !FIELD_GET(MPAMF_CCAP_IDR_NO_CMAX, ccap_features)) - mpam_set_feature(mpam_feat_ccap_part, props); + + if (props->cmax_wd) { + if (!FIELD_GET(MPAMF_CCAP_IDR_NO_CMAX, ccap_features)) + mpam_set_feature(mpam_feat_ccap_part, props); + + if (FIELD_GET(MPAMF_CCAP_IDR_HAS_CMIN, ccap_features)) + mpam_set_feature(mpam_feat_cmin, props); + } } /* Cache Portion partitioning */ @@ -1222,6 +1227,13 @@ static void mpam_reprogram_ris_partid(struct mpam_msc_ris *ris, u16 partid, mpam_write_partsel_reg(msc, CMAX, cmax); } + if (mpam_has_feature(mpam_feat_cmin, rprops)) { + if (mpam_has_feature(mpam_feat_cmin, cfg)) + mpam_write_partsel_reg(msc, CMIN, cfg->cmin); + else + mpam_write_partsel_reg(msc, CMIN, 0); + } + if (mpam_has_feature(mpam_feat_mbw_part, rprops)) { if (mpam_has_feature(mpam_feat_mbw_part, cfg)) mpam_write_partsel_reg(msc, MBW_PBM, cfg->mbw_pbm); @@ -1230,8 +1242,12 @@ static void mpam_reprogram_ris_partid(struct mpam_msc_ris *ris, u16 partid, rprops->mbw_pbm_bits); } - if (mpam_has_feature(mpam_feat_mbw_min, rprops)) - mpam_write_partsel_reg(msc, MBW_MIN, 0); + if (mpam_has_feature(mpam_feat_mbw_min, rprops)) { + if (mpam_has_feature(mpam_feat_mbw_min, cfg)) + mpam_write_partsel_reg(msc, MBW_MIN, cfg->mbw_min); + else + mpam_write_partsel_reg(msc, MBW_MIN, 0); + } if (mpam_has_feature(mpam_feat_mbw_max, rprops)) { if (mpam_has_feature(mpam_feat_mbw_max, cfg)) diff --git a/drivers/platform/mpam/mpam_internal.h b/drivers/platform/mpam/mpam_internal.h index c650eb878cd2..6555c2def51a 100644 --- a/drivers/platform/mpam/mpam_internal.h +++ b/drivers/platform/mpam/mpam_internal.h @@ -86,6 +86,7 @@ typedef u32 mpam_features_t; enum mpam_device_features { mpam_feat_ccap_part = 0, mpam_feat_cpor_part, + mpam_feat_cmin, mpam_feat_mbw_part, mpam_feat_mbw_min, mpam_feat_mbw_max, @@ -162,7 +163,9 @@ struct mpam_config { u32 cpbm; u32 mbw_pbm; u16 mbw_max; + u16 mbw_min; u16 cmax; + u16 cmin; }; struct mpam_component @@ -342,6 +345,7 @@ void mpam_resctrl_exit(void); #define MPAMCFG_PART_SEL 0x0100 /* partid to configure: */ #define MPAMCFG_CPBM 0x1000 /* cache-portion config */ #define MPAMCFG_CMAX 0x0108 /* cache-capacity config */ +#define MPAMCFG_CMIN 0x0110 /* cache-capacity min config */ #define MPAMCFG_MBW_MIN 0x0200 /* min mem-bw config */ #define MPAMCFG_MBW_MAX 0x0208 /* max mem-bw config */ #define MPAMCFG_MBW_WINWD 0x0220 /* mem-bw accounting window config */ diff --git a/drivers/platform/mpam/mpam_resctrl.c b/drivers/platform/mpam/mpam_resctrl.c index 6ea90d0009ea..4ecff61ddcd9 100644 --- a/drivers/platform/mpam/mpam_resctrl.c +++ b/drivers/platform/mpam/mpam_resctrl.c @@ -490,6 +490,13 @@ static bool cache_has_usable_cmax(struct mpam_class *class) return mpam_has_feature(mpam_feat_ccap_part, cprops); } +static bool cache_has_usable_cmin(struct mpam_class *class) +{ + struct mpam_props *cprops = &class->props; + + return mpam_has_feature(mpam_feat_cmin, cprops); +} + static bool cache_has_usable_csu(struct mpam_class *class) { struct mpam_props *cprops; @@ -543,6 +550,14 @@ static bool class_has_usable_mba(struct mpam_props *cprops) return false; } +static bool class_has_usable_mbw_min(struct mpam_props *cprops) +{ + if (mpam_has_feature(mpam_feat_mbw_min, cprops)) + return true; + + return false; +} + /* * Calculate the percentage change from each implemented bit in the control * This can return 0 when BWA_WD is greater than 6. (100 / (1<<7) == 0) @@ -646,9 +661,9 @@ static void mpam_resctrl_pick_caches(void) { int idx; unsigned int cache_size; - bool has_cpor, has_cmax; struct mpam_class *class; struct mpam_resctrl_res *res; + bool has_cpor, has_cmax, has_cmin; lockdep_assert_cpus_held(); @@ -658,6 +673,7 @@ static void mpam_resctrl_pick_caches(void) has_cpor = cache_has_usable_cpor(class); has_cmax = cache_has_usable_cmax(class); + has_cmin = cache_has_usable_cmin(class); if (class->type != MPAM_CLASS_CACHE) { pr_debug("pick_caches: Class is not a cache\n"); @@ -714,6 +730,17 @@ static void mpam_resctrl_pick_caches(void) } res->class = class; } + + if (has_cmin) { + if (class->level == 2) { + res = &mpam_resctrl_exports[RDT_RESOURCE_L2_MIN]; + res->resctrl_res.name = "L2MIN"; + } else { + res = &mpam_resctrl_exports[RDT_RESOURCE_L3_MIN]; + res->resctrl_res.name = "L3MIN"; + } + res->class = class; + } } srcu_read_unlock(&mpam_srcu, idx); } @@ -721,8 +748,8 @@ static void mpam_resctrl_pick_caches(void) static void mpam_resctrl_pick_mba(void) { struct mpam_resctrl_res *res; + bool has_mba, has_mbw_min; struct mpam_class *class; - bool has_mba; int idx; lockdep_assert_cpus_held(); @@ -732,13 +759,11 @@ static void mpam_resctrl_pick_mba(void) struct mpam_props *cprops = &class->props; has_mba = class_has_usable_mba(cprops); + has_mbw_min = class_has_usable_mbw_min(cprops); if (class->level < 3) continue; - if (!class_has_usable_mba(cprops)) - continue; - if (!cpumask_equal(&class->affinity, cpu_possible_mask)) continue; @@ -747,6 +772,12 @@ static void mpam_resctrl_pick_mba(void) res->class = class; res->resctrl_res.name = "MB"; } + + if (has_mbw_min) { + res = &mpam_resctrl_exports[RDT_RESOURCE_MB_MIN]; + res->class = class; + res->resctrl_res.name = "MBMIN"; + } } srcu_read_unlock(&mpam_srcu, idx); } @@ -903,6 +934,41 @@ static int mpam_resctrl_resource_init(struct mpam_resctrl_res *res) r->membw.bw_gran = max(100 / (1 << cprops->cmax_wd), 1); break; + case RDT_RESOURCE_L3_MIN: + case RDT_RESOURCE_L2_MIN: + r->format_str = "%d=%0*u"; + r->schema_fmt = RESCTRL_SCHEMA_PERCENT; + r->fflags = RFTYPE_RES_CACHE; + r->default_ctrl = MAX_MBA_BW; + r->data_width = 3; + r->cache_level = class->level; + + if (cache_has_usable_cmin(class)) + r->alloc_capable = true; + + r->membw.min_bw = 0; + r->membw.bw_gran = max(100 / (1 << cprops->cmax_wd), 1); + break; + + case RDT_RESOURCE_MB_MIN: + r->format_str = "%d=%0*u"; + r->schema_fmt = RESCTRL_SCHEMA_PERCENT; + r->fflags = RFTYPE_RES_MB; + r->default_ctrl = MAX_MBA_BW; + r->data_width = 3; + + r->membw.delay_linear = true; + r->membw.throttle_mode = THREAD_THROTTLE_UNDEFINED; + r->membw.bw_gran = get_mba_granularity(cprops); + + /* Round up to at least 1% */ + if (!r->membw.bw_gran) + r->membw.bw_gran = 1; + + if (class_has_usable_mbw_min(cprops)) + r->alloc_capable = true; + break; + default: break; } @@ -1025,6 +1091,10 @@ u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d, case RDT_RESOURCE_L3_MAX: configured_by = mpam_feat_ccap_part; break; + case RDT_RESOURCE_L2_MIN: + case RDT_RESOURCE_L3_MIN: + configured_by = mpam_feat_cmin; + break; case RDT_RESOURCE_MBA: if (mba_class_use_mbw_part(cprops)) { @@ -1034,7 +1104,12 @@ u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d, configured_by = mpam_feat_mbw_max; break; } - fallthrough; + return -EINVAL; + + case RDT_RESOURCE_MB_MIN: + configured_by = mpam_feat_mbw_min; + break; + default: return -EINVAL; } @@ -1049,11 +1124,15 @@ u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d, return cfg->cpbm; case mpam_feat_ccap_part: return mbw_max_to_percent(cfg->cmax, cprops->cmax_wd); + case mpam_feat_cmin: + return mbw_max_to_percent(cfg->cmin, cprops->cmax_wd); case mpam_feat_mbw_part: /* TODO: Scaling is not yet supported */ return mbw_pbm_to_percent(cfg->mbw_pbm, cprops); case mpam_feat_mbw_max: return mbw_max_to_percent(cfg->mbw_max, cprops->bwa_wd); + case mpam_feat_mbw_min: + return mbw_max_to_percent(cfg->mbw_min, cprops->bwa_wd); default: return -EINVAL; } @@ -1095,6 +1174,11 @@ int resctrl_arch_update_one(struct rdt_resource *r, struct rdt_domain *d, cfg.cmax = percent_to_mbw_max(cfg_val, cprops->cmax_wd); mpam_set_feature(mpam_feat_ccap_part, &cfg); break; + case RDT_RESOURCE_L2_MIN: + case RDT_RESOURCE_L3_MIN: + cfg.cmin = percent_to_mbw_max(cfg_val, cprops->cmax_wd); + mpam_set_feature(mpam_feat_cmin, &cfg); + break; case RDT_RESOURCE_MBA: if (mba_class_use_mbw_part(cprops)) { cfg.mbw_pbm = percent_to_mbw_pbm(cfg_val, cprops); @@ -1105,7 +1189,11 @@ int resctrl_arch_update_one(struct rdt_resource *r, struct rdt_domain *d, mpam_set_feature(mpam_feat_mbw_max, &cfg); break; } - fallthrough; + return -EINVAL; + case RDT_RESOURCE_MB_MIN: + cfg.mbw_min = percent_to_mbw_max(cfg_val, cprops->bwa_wd); + mpam_set_feature(mpam_feat_mbw_min, &cfg); + break; default: return -EINVAL; } diff --git a/include/linux/resctrl_types.h b/include/linux/resctrl_types.h index b155d536ed3d..ceaf8d31333e 100644 --- a/include/linux/resctrl_types.h +++ b/include/linux/resctrl_types.h @@ -81,6 +81,9 @@ enum resctrl_res_level { #ifdef CONFIG_ARM64_MPAM RDT_RESOURCE_L3_MAX, RDT_RESOURCE_L2_MAX, + RDT_RESOURCE_L3_MIN, + RDT_RESOURCE_L2_MIN, + RDT_RESOURCE_MB_MIN, #endif /* Must be the last */ -- 2.25.1

hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IC35SV -------------------------------- Allow users can configure the mata hard-limit feature and cache soft-limit feature by the schemata MBHDL:${domain_id}=${value} interface under the resctrl fs. When MAX bandwidth is exceeded, the hard-limit feature not allows the partition use any more bandwidth until the memory bandwidth measurement for the partition falls below MAX. Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- drivers/platform/mpam/mpam_devices.c | 16 +++++++++-- drivers/platform/mpam/mpam_internal.h | 2 ++ drivers/platform/mpam/mpam_resctrl.c | 40 ++++++++++++++++++++++++++- include/linux/resctrl_types.h | 1 + 4 files changed, 56 insertions(+), 3 deletions(-) diff --git a/drivers/platform/mpam/mpam_devices.c b/drivers/platform/mpam/mpam_devices.c index 0614ae4d382a..814959ac1ed2 100644 --- a/drivers/platform/mpam/mpam_devices.c +++ b/drivers/platform/mpam/mpam_devices.c @@ -611,8 +611,10 @@ static void mpam_ris_hw_probe(struct mpam_msc_ris *ris) mpam_set_feature(mpam_feat_mbw_part, props); props->bwa_wd = FIELD_GET(MPAMF_MBW_IDR_BWA_WD, mbw_features); - if (props->bwa_wd && FIELD_GET(MPAMF_MBW_IDR_HAS_MAX, mbw_features)) + if (props->bwa_wd && FIELD_GET(MPAMF_MBW_IDR_HAS_MAX, mbw_features)) { mpam_set_feature(mpam_feat_mbw_max, props); + mpam_set_feature(mpam_feat_max_limit, props); + } if (props->bwa_wd && FIELD_GET(MPAMF_MBW_IDR_HAS_MIN, mbw_features)) mpam_set_feature(mpam_feat_mbw_min, props); @@ -1197,6 +1199,7 @@ static void mpam_reset_msc_bitmap(struct mpam_msc *msc, u16 reg, u16 wd) static void mpam_reprogram_ris_partid(struct mpam_msc_ris *ris, u16 partid, struct mpam_config *cfg) { + bool limit; u32 pri_val = 0; u16 intpri, dspri; u16 cmax = MPAMCFG_CMAX_CMAX; @@ -1250,7 +1253,16 @@ static void mpam_reprogram_ris_partid(struct mpam_msc_ris *ris, u16 partid, if (mpam_has_feature(mpam_feat_mbw_max, rprops)) { if (mpam_has_feature(mpam_feat_mbw_max, cfg)) - mpam_write_partsel_reg(msc, MBW_MAX, cfg->mbw_max | MPAMCFG_MBW_MAX_HARDLIM); + bwa_fract = cfg->mbw_max; + + if (mpam_has_feature(mpam_feat_max_limit, cfg)) + limit = cfg->max_limit; + else + limit = false; + + if (limit) + mpam_write_partsel_reg(msc, MBW_MAX, bwa_fract | + MPAMCFG_MBW_MAX_HARDLIM); else mpam_write_partsel_reg(msc, MBW_MAX, bwa_fract); } diff --git a/drivers/platform/mpam/mpam_internal.h b/drivers/platform/mpam/mpam_internal.h index 47582ddc554f..e9c52078edea 100644 --- a/drivers/platform/mpam/mpam_internal.h +++ b/drivers/platform/mpam/mpam_internal.h @@ -90,6 +90,7 @@ enum mpam_device_features { mpam_feat_mbw_part, mpam_feat_mbw_min, mpam_feat_mbw_max, + mpam_feat_max_limit, mpam_feat_mbw_prop, mpam_feat_intpri_part, mpam_feat_intpri_part_0_low, @@ -164,6 +165,7 @@ struct mpam_config { u32 mbw_pbm; u16 mbw_max; u16 mbw_min; + bool max_limit; u16 cmax; u16 cmin; diff --git a/drivers/platform/mpam/mpam_resctrl.c b/drivers/platform/mpam/mpam_resctrl.c index b4e004281745..67cdcfc9e693 100644 --- a/drivers/platform/mpam/mpam_resctrl.c +++ b/drivers/platform/mpam/mpam_resctrl.c @@ -566,6 +566,14 @@ static bool class_has_usable_intpri(struct mpam_props *cprops) return false; } +static bool class_has_usable_max_limit(struct mpam_props *cprops) +{ + if (mpam_has_feature(mpam_feat_max_limit, cprops)) + return true; + + return false; +} + /* * Calculate the percentage change from each implemented bit in the control * This can return 0 when BWA_WD is greater than 6. (100 / (1<<7) == 0) @@ -767,8 +775,8 @@ static void mpam_resctrl_pick_caches(void) static void mpam_resctrl_pick_mba(void) { + bool has_mba, has_mbw_min, has_intpri, has_limit; struct mpam_resctrl_res *res; - bool has_mba, has_mbw_min, has_intpri; struct mpam_class *class; int idx; @@ -781,6 +789,7 @@ static void mpam_resctrl_pick_mba(void) has_mba = class_has_usable_mba(cprops); has_mbw_min = class_has_usable_mbw_min(cprops); has_intpri = class_has_usable_intpri(cprops); + has_limit = class_has_usable_max_limit(cprops); if (class->level < 3) continue; @@ -805,6 +814,12 @@ static void mpam_resctrl_pick_mba(void) res->class = class; res->resctrl_res.name = "MBPRI"; } + + if (has_limit) { + res = &mpam_resctrl_exports[RDT_RESOURCE_MB_HDL]; + res->class = class; + res->resctrl_res.name = "MBHDL"; + } } srcu_read_unlock(&mpam_srcu, idx); } @@ -1025,6 +1040,19 @@ static int mpam_resctrl_resource_init(struct mpam_resctrl_res *res) r->alloc_capable = true; break; + case RDT_RESOURCE_MB_HDL: + r->format_str = "%d=%0*u"; + r->schema_fmt = RESCTRL_SCHEMA_PERCENT; + r->fflags = RFTYPE_RES_MB; + r->default_ctrl = 1; + r->data_width = 1; + + r->membw.bw_gran = 1; + + if (class_has_usable_max_limit(cprops)) + r->alloc_capable = true; + break; + default: break; } @@ -1171,6 +1199,10 @@ u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d, configured_by = mpam_feat_mbw_min; break; + case RDT_RESOURCE_MB_HDL: + configured_by = mpam_feat_max_limit; + break; + default: return -EINVAL; } @@ -1196,6 +1228,8 @@ u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d, return mbw_max_to_percent(cfg->mbw_max, cprops->bwa_wd); case mpam_feat_mbw_min: return mbw_max_to_percent(cfg->mbw_min, cprops->bwa_wd); + case mpam_feat_max_limit: + return cfg->max_limit; default: return -EINVAL; } @@ -1263,6 +1297,10 @@ int resctrl_arch_update_one(struct rdt_resource *r, struct rdt_domain *d, cfg.mbw_min = percent_to_mbw_max(cfg_val, cprops->bwa_wd); mpam_set_feature(mpam_feat_mbw_min, &cfg); break; + case RDT_RESOURCE_MB_HDL: + cfg.max_limit = cfg_val; + mpam_set_feature(mpam_feat_max_limit, &cfg); + break; default: return -EINVAL; } diff --git a/include/linux/resctrl_types.h b/include/linux/resctrl_types.h index ad8d1ac7ca29..fd1704766c29 100644 --- a/include/linux/resctrl_types.h +++ b/include/linux/resctrl_types.h @@ -87,6 +87,7 @@ enum resctrl_res_level { RDT_RESOURCE_L3_PRI, RDT_RESOURCE_L2_PRI, RDT_RESOURCE_MB_PRI, + RDT_RESOURCE_MB_HDL, #endif /* Must be the last */ -- 2.25.1