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| author |   James Morse <james.morse@arm.com> | 2021-07-28 17:06:15 +0000 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2021-08-11 12:00:43 +0200 |
| commit | 792e0f6f789bda5e31b1dbcfcc84068da36a79b1 (patch) | |
| tree | 2f9bd1b5a0953e85321ed697f9e258f007979245 /include/linux/resctrl.h | |
| parent | x86/resctrl: Split struct rdt_resource (diff) | |
| download | linux-dev-792e0f6f789bda5e31b1dbcfcc84068da36a79b1.tar.xz linux-dev-792e0f6f789bda5e31b1dbcfcc84068da36a79b1.zip | |
x86/resctrl: Split struct rdt_domain
resctrl is the defacto Linux ABI for SoC resource partitioning features.
To support it on another architecture, it needs to be abstracted from
the features provided by Intel RDT and AMD PQoS, and moved to /fs/.
struct rdt_domain contains a mix of architecture private details and
properties of the filesystem interface user-space uses.
Continue by splitting struct rdt_domain, into an architecture private
'hw' struct, which contains the common resctrl structure that would be
used by any architecture. The hardware values in ctrl_val and mbps_val
need to be accessed via helpers to allow another architecture to convert
these into a different format if necessary. After this split, filesystem
code paths touching a 'hw' struct indicates where an abstraction is
needed.
Splitting this structure only moves types around, and should not lead
to any change in behaviour.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-3-james.morse@arm.com
Diffstat (limited to 'include/linux/resctrl.h')
| -rw-r--r-- | include/linux/resctrl.h | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index 5ccf36b7dbbf..a4c89dafd7fa 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -15,7 +15,37 @@ int proc_resctrl_show(struct seq_file *m, #endif -struct rdt_domain; +/** + * struct rdt_domain - group of CPUs sharing a resctrl resource + * @list: all instances of this resource + * @id: unique id for this instance + * @cpu_mask: which CPUs share this resource + * @new_ctrl: new ctrl value to be loaded + * @have_new_ctrl: did user provide new_ctrl for this domain + * @rmid_busy_llc: bitmap of which limbo RMIDs are above threshold + * @mbm_total: saved state for MBM total bandwidth + * @mbm_local: saved state for MBM local bandwidth + * @mbm_over: worker to periodically read MBM h/w counters + * @cqm_limbo: worker to periodically read CQM h/w counters + * @mbm_work_cpu: worker CPU for MBM h/w counters + * @cqm_work_cpu: worker CPU for CQM h/w counters + * @plr: pseudo-locked region (if any) associated with domain + */ +struct rdt_domain { + struct list_head list; + int id; + struct cpumask cpu_mask; + u32 new_ctrl; + bool have_new_ctrl; + unsigned long *rmid_busy_llc; + struct mbm_state *mbm_total; + struct mbm_state *mbm_local; + struct delayed_work mbm_over; + struct delayed_work cqm_limbo; + int mbm_work_cpu; + int cqm_work_cpu; + struct pseudo_lock_region *plr; +}; /** * struct resctrl_cache - Cache allocation related data |