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| author | James Morse <james.morse@arm.com> | 2026-03-13 14:45:53 +0000 |
|---|---|---|
| committer | James Morse <james.morse@arm.com> | 2026-03-27 15:29:42 +0000 |
| commit | 370d166d878d0c0aa06568d67387a1151a200501 (patch) | |
| tree | ad6ebcec0f8515abe76bf7e58b3ba3403b69b9c2 /drivers/resctrl | |
| parent | 52a4edb16121d07734e4e392767d26d286f08c35 (diff) | |
| download | lwn-370d166d878d0c0aa06568d67387a1151a200501.tar.gz lwn-370d166d878d0c0aa06568d67387a1151a200501.zip | |
arm_mpam: resctrl: Implement resctrl_arch_reset_all_ctrls()
We already have a helper for resetting an mpam class and component. Hook
it up to resctrl_arch_reset_all_ctrls() and the domain offline path.
Tested-by: Gavin Shan <gshan@redhat.com>
Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: Peter Newman <peternewman@google.com>
Tested-by: Zeng Heng <zengheng4@huawei.com>
Tested-by: Punit Agrawal <punit.agrawal@oss.qualcomm.com>
Tested-by: Jesse Chick <jessechick@os.amperecomputing.com>
Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: Zeng Heng <zengheng4@huawei.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Co-developed-by: Ben Horgan <ben.horgan@arm.com>
Signed-off-by: Ben Horgan <ben.horgan@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Diffstat (limited to 'drivers/resctrl')
| -rw-r--r-- | drivers/resctrl/mpam_devices.c | 2 | ||||
| -rw-r--r-- | drivers/resctrl/mpam_internal.h | 3 | ||||
| -rw-r--r-- | drivers/resctrl/mpam_resctrl.c | 13 |
3 files changed, 17 insertions, 1 deletions
diff --git a/drivers/resctrl/mpam_devices.c b/drivers/resctrl/mpam_devices.c index 0e525539b7e2..0e5e24ef60fe 100644 --- a/drivers/resctrl/mpam_devices.c +++ b/drivers/resctrl/mpam_devices.c @@ -2551,7 +2551,7 @@ static void mpam_reset_component_locked(struct mpam_component *comp) } } -static void mpam_reset_class_locked(struct mpam_class *class) +void mpam_reset_class_locked(struct mpam_class *class) { struct mpam_component *comp; diff --git a/drivers/resctrl/mpam_internal.h b/drivers/resctrl/mpam_internal.h index 43c8e0f5f7ac..f063a741aaba 100644 --- a/drivers/resctrl/mpam_internal.h +++ b/drivers/resctrl/mpam_internal.h @@ -388,6 +388,9 @@ extern u8 mpam_pmg_max; void mpam_enable(struct work_struct *work); void mpam_disable(struct work_struct *work); +/* Reset all the RIS in a class under cpus_read_lock() */ +void mpam_reset_class_locked(struct mpam_class *class); + int mpam_apply_config(struct mpam_component *comp, u16 partid, struct mpam_config *cfg); diff --git a/drivers/resctrl/mpam_resctrl.c b/drivers/resctrl/mpam_resctrl.c index 65bb670dc3fb..b2217d11561d 100644 --- a/drivers/resctrl/mpam_resctrl.c +++ b/drivers/resctrl/mpam_resctrl.c @@ -170,6 +170,19 @@ static int mpam_resctrl_pick_domain_id(int cpu, struct mpam_component *comp) return comp->comp_id; } +void resctrl_arch_reset_all_ctrls(struct rdt_resource *r) +{ + struct mpam_resctrl_res *res; + + lockdep_assert_cpus_held(); + + if (!mpam_is_enabled()) + return; + + res = container_of(r, struct mpam_resctrl_res, resctrl_res); + mpam_reset_class_locked(res->class); +} + static void mpam_resctrl_domain_hdr_init(int cpu, struct mpam_component *comp, enum resctrl_res_level rid, struct rdt_domain_hdr *hdr) |