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| author | James Morse <james.morse@arm.com> | 2026-03-13 17:46:06 +0300 |
|---|---|---|
| committer | James Morse <james.morse@arm.com> | 2026-03-27 18:31:38 +0300 |
| commit | 2a3c79c61539779a09928893518c8286d7774b54 (patch) | |
| tree | db4818d97031cff82255969be314e6ed8c831a64 /include | |
| parent | 1458c4f053355f88cc5d190ca02243d2c60fa010 (diff) | |
| download | linux-2a3c79c61539779a09928893518c8286d7774b54.tar.xz | |
arm_mpam: resctrl: Allow resctrl to allocate monitors
When resctrl wants to read a domain's 'QOS_L3_OCCUP', it needs to allocate
a monitor on the corresponding resource. Monitors are allocated by class
instead of component.
Add helpers to allocate a CSU monitor. These helper return an out of range
value for MBM counters.
Allocating a montitor context is expected to block until hardware resources
become available. This only makes sense for QOS_L3_OCCUP as unallocated MBM
counters are losing data.
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: Zeng Heng <zengheng4@huawei.com>
Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.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 'include')
| -rw-r--r-- | include/linux/arm_mpam.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/arm_mpam.h b/include/linux/arm_mpam.h index 7d23c90f077d..e1461e32af75 100644 --- a/include/linux/arm_mpam.h +++ b/include/linux/arm_mpam.h @@ -5,6 +5,7 @@ #define __LINUX_ARM_MPAM_H #include <linux/acpi.h> +#include <linux/resctrl_types.h> #include <linux/types.h> struct mpam_msc; @@ -62,6 +63,10 @@ u32 resctrl_arch_rmid_idx_encode(u32 closid, u32 rmid); void resctrl_arch_rmid_idx_decode(u32 idx, u32 *closid, u32 *rmid); u32 resctrl_arch_system_num_rmid_idx(void); +struct rdt_resource; +void *resctrl_arch_mon_ctx_alloc(struct rdt_resource *r, enum resctrl_event_id evtid); +void resctrl_arch_mon_ctx_free(struct rdt_resource *r, enum resctrl_event_id evtid, void *ctx); + /** * mpam_register_requestor() - Register a requestor with the MPAM driver * @partid_max: The maximum PARTID value the requestor can generate. |