hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IAK8CS -------------------------------- When CDP is enabled, but the resource like MATA doesn't support it, we need to apply the same configuration to both of the CDP_CODE and CDP_DATA partids. In mpam_apply_config(), it will synchronize the configuration to the wrong comp->cfg[partid]. We will first update the staged_config with correct conf_type and then update the configuration to the comp->cfg corresponding to the partid by resctrl_arch_update_one(). In the same way, when get configuration from schemata interface by resctrl_arch_get_config(), we need to get the configuration of the CDP_CODE partid. Fixes: 58db5c68e84a ("untested: arm_mpam: resctrl: Add support for MB resource") Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- arch/x86/include/asm/resctrl.h | 4 ++++ drivers/platform/mpam/mpam_resctrl.c | 31 +++++++++++----------------- fs/resctrl/ctrlmondata.c | 28 ++++++++++++++++++++++--- include/linux/arm_mpam.h | 1 + 4 files changed, 42 insertions(+), 22 deletions(-) diff --git a/arch/x86/include/asm/resctrl.h b/arch/x86/include/asm/resctrl.h index 2aa30e36b29a..b0cb9d283a2b 100644 --- a/arch/x86/include/asm/resctrl.h +++ b/arch/x86/include/asm/resctrl.h @@ -222,6 +222,10 @@ void resctrl_cpu_detect(struct cpuinfo_x86 *c); bool resctrl_arch_get_cdp_enabled(enum resctrl_res_level l); int resctrl_arch_set_cdp_enabled(enum resctrl_res_level l, bool enable); +static inline bool resctrl_arch_hide_cdp(enum resctrl_res_level rid) +{ + return false; +}; static inline bool resctrl_arch_feat_capable(enum resctrl_res_level level, enum resctrl_feat_type feat) diff --git a/drivers/platform/mpam/mpam_resctrl.c b/drivers/platform/mpam/mpam_resctrl.c index bb826277d027..b20ab2c756f1 100644 --- a/drivers/platform/mpam/mpam_resctrl.c +++ b/drivers/platform/mpam/mpam_resctrl.c @@ -180,7 +180,7 @@ int resctrl_arch_set_cdp_enabled(enum resctrl_res_level ignored, bool enable) return 0; } -static bool mpam_resctrl_hide_cdp(enum resctrl_res_level rid) +bool resctrl_arch_hide_cdp(enum resctrl_res_level rid) { return cdp_enabled && !resctrl_arch_get_cdp_enabled(rid); } @@ -1000,7 +1000,16 @@ u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d, dom = container_of(d, struct mpam_resctrl_dom, resctrl_dom); cprops = &res->class->props; - partid = resctrl_get_config_index(closid, type); + /* + * When CDP is enabled, but the resource doesn't support it, we + * need to get the configuration from the CDP_CODE resctrl_conf_type + * which is same as the CDP_DATA one. + */ + if (resctrl_arch_hide_cdp(r->rid)) + partid = resctrl_get_config_index(closid, CDP_CODE); + else + partid = resctrl_get_config_index(closid, type); + cfg = &dom->comp->cfg[partid]; switch (r->rid) { @@ -1119,7 +1128,6 @@ int resctrl_arch_update_one(struct rdt_resource *r, struct rdt_domain *d, u32 cl enum resctrl_conf_type t, enum resctrl_feat_type f, u32 cfg_val) { - int err; u32 partid; struct mpam_config cfg; struct mpam_props *cprops; @@ -1205,22 +1213,7 @@ int resctrl_arch_update_one(struct rdt_resource *r, struct rdt_domain *d, u32 cl return -EINVAL; } - /* - * When CDP is enabled, but the resource doesn't support it, we need to - * apply the same configuration to the other partid. - */ - if (mpam_resctrl_hide_cdp(r->rid)) { - partid = resctrl_get_config_index(closid, CDP_CODE); - err = mpam_apply_config(dom->comp, partid, &cfg); - if (err) - return err; - - partid = resctrl_get_config_index(closid, CDP_DATA); - return mpam_apply_config(dom->comp, partid, &cfg); - - } else { - return mpam_apply_config(dom->comp, partid, &cfg); - } + return mpam_apply_config(dom->comp, partid, &cfg); } /* TODO: this is IPI heavy */ diff --git a/fs/resctrl/ctrlmondata.c b/fs/resctrl/ctrlmondata.c index 7c728b4eaaa2..ec27c7cc12e3 100644 --- a/fs/resctrl/ctrlmondata.c +++ b/fs/resctrl/ctrlmondata.c @@ -132,15 +132,15 @@ static bool lim_validate(char *buf, unsigned long *data, struct rdt_resource *r) return true; } -static int parse_bw(struct rdt_parse_data *data, struct resctrl_schema *s, - struct rdt_domain *d) +static int parse_bw_conf_type(struct rdt_parse_data *data, struct resctrl_schema *s, + struct rdt_domain *d, enum resctrl_conf_type conf_type) { struct resctrl_staged_config *cfg; u32 closid = data->rdtgrp->closid; struct rdt_resource *r = s->res; unsigned long bw_val; - cfg = &d->staged_config[s->conf_type][s->feat_type]; + cfg = &d->staged_config[conf_type][s->feat_type]; if (cfg->have_new_ctrl) { rdt_last_cmd_printf("Duplicate domain %d\n", d->id); return -EINVAL; @@ -176,6 +176,28 @@ static int parse_bw(struct rdt_parse_data *data, struct resctrl_schema *s, return 0; } +static int parse_bw(struct rdt_parse_data *data, struct resctrl_schema *s, + struct rdt_domain *d) +{ + struct rdt_resource *r = s->res; + int err; + + /* + * When CDP is enabled, but the resource doesn't support it, we + * need to apply the same configuration to both of the CDP_CODE + * and CDP_DATA resctrl_conf_type. + */ + if (resctrl_arch_hide_cdp(r->rid)) { + err = parse_bw_conf_type(data, s, d, CDP_CODE); + if (err) + return err; + + return parse_bw_conf_type(data, s, d, CDP_DATA); + } + + return parse_bw_conf_type(data, s, d, s->conf_type); +} + /* * Check whether a cache bit mask is valid. * On Intel CPUs, non-contiguous 1s value support is indicated by CPUID: diff --git a/include/linux/arm_mpam.h b/include/linux/arm_mpam.h index 8f68f0397e03..afc7445f09e1 100644 --- a/include/linux/arm_mpam.h +++ b/include/linux/arm_mpam.h @@ -78,6 +78,7 @@ void resctrl_arch_reset_resources(void); bool resctrl_arch_get_cdp_enabled(enum resctrl_res_level ignored); int resctrl_arch_set_cdp_enabled(enum resctrl_res_level ignored, bool enable); +bool resctrl_arch_hide_cdp(enum resctrl_res_level rid); bool resctrl_arch_match_closid(struct task_struct *tsk, u32 closid); bool resctrl_arch_match_rmid(struct task_struct *tsk, u32 closid, u32 rmid); void resctrl_arch_set_cpu_default_closid(int cpu, u32 closid); -- 2.25.1