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| author | James Morse <james.morse@arm.com> | 2022-09-02 15:48:19 +0000 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-09-22 17:43:44 +0200 |
| commit | ff6357bb50023af2a1dc8f113930082c5252c753 (patch) | |
| tree | 68e6743c6d7b5bfb697b335d530d4574be6e58d6 /include/linux/resctrl.h | |
| parent | b58d4eb1f199f5a26d8c756d8e74a31c48b90428 (diff) | |
| download | linux-ff6357bb50023af2a1dc8f113930082c5252c753.tar.bz2 | |
x86/resctrl: Allow update_mba_bw() to update controls directly
update_mba_bw() calculates a new control value for the MBA resource
based on the user provided mbps_val and the current measured
bandwidth. Some control values need remapping by delay_bw_map().
It does this by calling wrmsrl() directly. This needs splitting
up to be done by an architecture specific helper, so that the
remainder can eventually be moved to /fs/.
Add resctrl_arch_update_one() to apply one configuration value
to the provided resource and domain. This avoids the staging
and cross-calling that is only needed with changes made by
user-space. delay_bw_map() moves to be part of the arch code,
to maintain the 'percentage control' view of MBA resources
in resctrl.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <quic_jiles@quicinc.com>
Reviewed-by: Shaopeng Tan <tan.shaopeng@fujitsu.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Xin Hao <xhao@linux.alibaba.com>
Tested-by: Shaopeng Tan <tan.shaopeng@fujitsu.com>
Tested-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20220902154829.30399-12-james.morse@arm.com
Diffstat (limited to 'include/linux/resctrl.h')
| -rw-r--r-- | include/linux/resctrl.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index 93dfe553b364..f4c9101df461 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -197,6 +197,14 @@ struct resctrl_schema { /* The number of closid supported by this resource regardless of CDP */ u32 resctrl_arch_get_num_closid(struct rdt_resource *r); int resctrl_arch_update_domains(struct rdt_resource *r, u32 closid); + +/* + * Update the ctrl_val and apply this config right now. + * Must be called on one of the domain's CPUs. + */ +int resctrl_arch_update_one(struct rdt_resource *r, struct rdt_domain *d, + u32 closid, enum resctrl_conf_type t, u32 cfg_val); + u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d, u32 closid, enum resctrl_conf_type type); int resctrl_online_domain(struct rdt_resource *r, struct rdt_domain *d); |