[PATCH v7 30/49] x86/resctrl: Move get_{mon,ctrl}_domain_from_cpu() to live with their callers

James Morse
2025-02-28T20:01:47Z

Each of get_{mon,ctrl}_domain_from_cpu() only has one caller.

Once the filesystem code is moved to /fs/, there is no equivalent to
core.c.

Move these functions to each live next to their caller. This allows
them to be made static and teh header file entries to be removed.

Signed-off-by: James Morse <james.morse@arm.com>
---
Changes since v6:
* This patch replaces one that moved these to a header, any arch code
will need its own way of finding the domain to online/offline from
a cpu number.
---
arch/x86/kernel/cpu/resctrl/core.c | 30 --------------------------
arch/x86/kernel/cpu/resctrl/internal.h | 2 --
arch/x86/kernel/cpu/resctrl/monitor.c | 16 ++++++++++++++
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 16 ++++++++++++++
4 files changed, 32 insertions(+), 32 deletions(-)

diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index 70421d52eceb..b7ce578bffa5 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -349,36 +349,6 @@ static void cat_wrmsr(struct msr_param *m)
wrmsrl(hw_res->msr_base + i, hw_dom->ctrl_val[i]);
}

-struct rdt_ctrl_domain *get_ctrl_domain_from_cpu(int cpu, struct rdt_resource *r)
-{
- struct rdt_ctrl_domain *d;
-
- lockdep_assert_cpus_held();
-
- list_for_each_entry(d, &r->ctrl_domains, hdr.list) {
- /* Find the domain that contains this CPU */
- if (cpumask_test_cpu(cpu, &d->hdr.cpu_mask))
- return d;
- }
-
- return NULL;
-}
-
-struct rdt_mon_domain *get_mon_domain_from_cpu(int cpu, struct rdt_resource *r)
-{
- struct rdt_mon_domain *d;
-
- lockdep_assert_cpus_held();
-
- list_for_each_entry(d, &r->mon_domains, hdr.list) {
- /* Find the domain that contains this CPU */
- if (cpumask_test_cpu(cpu, &d->hdr.cpu_mask))
- return d;
- }
-
- return NULL;
-}
-
u32 resctrl_arch_get_num_closid(struct rdt_resource *r)
{
return resctrl_to_arch_res(r)->num_closid;
diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h
index 0d13006e920b..c44c5b496355 100644
--- a/arch/x86/kernel/cpu/resctrl/internal.h
+++ b/arch/x86/kernel/cpu/resctrl/internal.h
@@ -475,8 +475,6 @@ unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r, struct rdt_ctrl_domain
unsigned long cbm);
enum rdtgrp_mode rdtgroup_mode_by_closid(int closid);
int rdtgroup_tasks_assigned(struct rdtgroup *r);
-struct rdt_ctrl_domain *get_ctrl_domain_from_cpu(int cpu, struct rdt_resource *r);
-struct rdt_mon_domain *get_mon_domain_from_cpu(int cpu, struct rdt_resource *r);
int closids_supported(void);
void closid_free(int closid);
int alloc_rmid(u32 closid);
diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c
index 83f90128d768..a93ed7d2a160 100644
--- a/arch/x86/kernel/cpu/resctrl/monitor.c
+++ b/arch/x86/kernel/cpu/resctrl/monitor.c
@@ -718,6 +718,22 @@ void mon_event_count(void *info)
rr->err = 0;
}

+static struct rdt_ctrl_domain *get_ctrl_domain_from_cpu(int cpu,
+ struct rdt_resource *r)
+{
+ struct rdt_ctrl_domain *d;
+
+ lockdep_assert_cpus_held();
+
+ list_for_each_entry(d, &r->ctrl_domains, hdr.list) {
+ /* Find the domain that contains this CPU */
+ if (cpumask_test_cpu(cpu, &d->hdr.cpu_mask))
+ return d;
+ }
+
+ return NULL;
+}
+
/*
* Feedback loop for MBA software controller (mba_sc)
*
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index 5fc60c9ce28f..c6274d40b217 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -4257,6 +4257,22 @@ static void clear_childcpus(struct rdtgroup *r, unsigned int cpu)
}
}

+static struct rdt_mon_domain *get_mon_domain_from_cpu(int cpu,
+ struct rdt_resource *r)
+{
+ struct rdt_mon_domain *d;
+
+ lockdep_assert_cpus_held();
+
+ list_for_each_entry(d, &r->mon_domains, hdr.list) {
+ /* Find the domain that contains this CPU */
+ if (cpumask_test_cpu(cpu, &d->hdr.cpu_mask))
+ return d;
+ }
+
+ return NULL;
+}
+
void resctrl_offline_cpu(unsigned int cpu)
{
struct rdt_resource *l3 = resctrl_arch_get_resource(RDT_RESOURCE_L3);
--
2.39.5