Commit 29180afc authored by James Morse's avatar James Morse Committed by Zeng Heng
Browse files

arm_mpam: resctrl: Add resctrl_arch_get_config() 

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/snapshot/v6.7-rc2



---------------------------

Implement resctrl_arch_get_config() by testing the configuration for a
CPOR bitmap. For any other configuration type return the default.

Signed-off-by: default avatarJames Morse <james.morse@arm.com>
Signed-off-by: default avatarZeng Heng <zengheng4@huawei.com>
parent 70f9e820

drivers/platform/mpam/mpam_devices.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

drivers/platform/mpam/mpam_resctrl.c

+44 −0
Original line number Diff line number Diff line
@@ -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;