From: James Morse <james.morse@arm.com> maillist inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8T2RT Reference: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git/log/?h=mpam/... --------------------------- Implement resctrl_arch_get_config() by testing the configuration for a CPOR bitmap. For any other configuration type return the default. Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- drivers/platform/mpam/mpam_devices.c | 3 ++ drivers/platform/mpam/mpam_resctrl.c | 44 ++++++++++++++++++++++++++++ 2 files changed, 47 insertions(+) diff --git a/drivers/platform/mpam/mpam_devices.c b/drivers/platform/mpam/mpam_devices.c index 13f48878c3d5..5ebb944ad9fc 100644 --- a/drivers/platform/mpam/mpam_devices.c +++ b/drivers/platform/mpam/mpam_devices.c @@ -2302,6 +2302,9 @@ int mpam_apply_config(struct mpam_component *comp, u16 partid, lockdep_assert_cpus_held(); + if (!memcmp(&comp->cfg[partid], cfg, sizeof(*cfg))) + return 0; + comp->cfg[partid] = *cfg; arg.comp = comp; arg.partid = partid; diff --git a/drivers/platform/mpam/mpam_resctrl.c b/drivers/platform/mpam/mpam_resctrl.c index 7a54dc7c8056..940d2bf7ccd4 100644 --- a/drivers/platform/mpam/mpam_resctrl.c +++ b/drivers/platform/mpam/mpam_resctrl.c @@ -248,6 +248,50 @@ int mpam_resctrl_setup(void) return err; } +u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d, + u32 closid, enum resctrl_conf_type type) +{ + u32 partid; + struct mpam_config *cfg; + struct mpam_props *cprops; + struct mpam_resctrl_res *res; + struct mpam_resctrl_dom *dom; + enum mpam_device_features configured_by; + + lockdep_assert_cpus_held(); + + if (!mpam_is_enabled()) + return r->default_ctrl; + + res = container_of(r, struct mpam_resctrl_res, resctrl_res); + dom = container_of(d, struct mpam_resctrl_dom, resctrl_dom); + cprops = &res->class->props; + + partid = resctrl_get_config_index(closid, type); + cfg = &dom->comp->cfg[partid]; + + switch (r->rid) { + case RDT_RESOURCE_L2: + case RDT_RESOURCE_L3: + configured_by = mpam_feat_cpor_part; + break; + default: + return -EINVAL; + } + + if (!r->alloc_capable || partid >= resctrl_arch_get_num_closid(r) || + !mpam_has_feature(configured_by, cfg)) + return r->default_ctrl; + + switch (configured_by) { + case mpam_feat_cpor_part: + /* TODO: Scaling is not yet supported */ + return cfg->cpbm; + default: + return -EINVAL; + } +} + void resctrl_arch_reset_resources(void) { int i, idx; -- 2.25.1