Commit 70f9e820 authored by James Morse's avatar James Morse Committed by Zeng Heng
Browse files

arm_mpam: resctrl: Implement resctrl_arch_reset_resources() 

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



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

We already have a helper for reseting an mpam class. Hook it up to
resctrl_arch_reset_resources().

Signed-off-by: default avatarJames Morse <james.morse@arm.com>
Signed-off-by: default avatarZeng Heng <zengheng4@huawei.com>
parent cc622cf0

drivers/platform/mpam/mpam_devices.c

+1 −1
Original line number Diff line number Diff line
@@ -2177,7 +2177,7 @@ static void mpam_enable_once(void) 
		READ_ONCE(mpam_partid_max) + 1, mpam_pmg_max + 1);

}



static void mpam_reset_class(struct mpam_class *class)

void mpam_reset_class(struct mpam_class *class)

{

	int idx;

	struct mpam_msc_ris *ris;

drivers/platform/mpam/mpam_internal.h

+2 −0
Original line number Diff line number Diff line
@@ -293,6 +293,8 @@ extern u8 mpam_pmg_max; 
void mpam_enable(struct work_struct *work);

void mpam_disable(struct work_struct *work);



void mpam_reset_class(struct mpam_class *class);



int mpam_apply_config(struct mpam_component *comp, u16 partid,

		      struct mpam_config *cfg);

drivers/platform/mpam/mpam_resctrl.c

+27 −0
Original line number Diff line number Diff line
@@ -248,6 +248,33 @@ int mpam_resctrl_setup(void) 
	return err;

}



void resctrl_arch_reset_resources(void)

{

	int i, idx;

	struct mpam_class *class;

	struct mpam_resctrl_res *res;



	lockdep_assert_cpus_held();



	if (!mpam_is_enabled())

		return;



	for (i = 0; i < RDT_NUM_RESOURCES; i++) {

		res = &mpam_resctrl_exports[i];



		if (!res->class)

			continue;	// dummy resource



		if (!res->resctrl_res.alloc_capable)

			continue;



		idx = srcu_read_lock(&mpam_srcu);

		list_for_each_entry_rcu(class, &mpam_classes, classes_list)

			mpam_reset_class(class);

		srcu_read_unlock(&mpam_srcu, idx);

	}

}



static struct mpam_resctrl_dom *

mpam_resctrl_alloc_domain(unsigned int cpu, struct mpam_resctrl_res *res)

{

include/linux/arm_mpam.h

+3 −0
Original line number Diff line number Diff line
@@ -50,4 +50,7 @@ static inline bool resctrl_arch_is_mbm_total_enabled(void) 
	return false;

}



/* reset cached configurations, then all devices */

void resctrl_arch_reset_resources(void);



#endif /* __LINUX_ARM_MPAM_H */