[PATCH v1 07/31] x86/resctrl: Wrap resctrl_arch_find_domain() around rdt_find_domain()

James Morse
2024-03-21T16:51:52Z

rdt_find_domain() finds a domain given a resource and a cache-id.
It's not quite right for the resctrl arch API as it also returns the
position to insert a new domain, which is needed when bringing a
domain online in the arch code.

Wrap rdt_find_domain() in a another function resctrl_arch_find_domain()
so we avoid the unnecessary argument outside the arch code.

Signed-off-by: James Morse <james.morse@arm.com>
---
arch/x86/kernel/cpu/resctrl/core.c | 9 +++++++--
arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 2 +-
arch/x86/kernel/cpu/resctrl/internal.h | 2 --
include/linux/resctrl.h | 2 ++
4 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index b4e7d655e242..06dc12b08afc 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -405,8 +405,8 @@ void rdt_ctrl_update(void *arg)
* caller, return the first domain whose id is bigger than the input id.
* The domain list is sorted by id in ascending order.
*/
-struct rdt_domain *rdt_find_domain(struct rdt_resource *r, int id,
- struct list_head **pos)
+static struct rdt_domain *rdt_find_domain(struct rdt_resource *r, int id,
+ struct list_head **pos)
{
struct rdt_domain *d;
struct list_head *l;
@@ -430,6 +430,11 @@ struct rdt_domain *rdt_find_domain(struct rdt_resource *r, int id,
return NULL;
}

+struct rdt_domain *resctrl_arch_find_domain(struct rdt_resource *r, int id)
+{
+ return rdt_find_domain(r, id, NULL);
+}
+
static void setup_default_ctrlval(struct rdt_resource *r, u32 *dc)
{
struct rdt_hw_resource *hw_res = resctrl_to_arch_res(r);
diff --git a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c
index 72a651671c68..3603ade95f1d 100644
--- a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c
+++ b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c
@@ -618,7 +618,7 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg)
evtid = md.u.evtid;

r = resctrl_arch_get_resource(resid);
- d = rdt_find_domain(r, domid, NULL);
+ d = resctrl_arch_find_domain(r, domid);
if (IS_ERR_OR_NULL(d)) {
ret = -ENOENT;
goto out;
diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h
index 7c073298aabf..32ade929ea1b 100644
--- a/arch/x86/kernel/cpu/resctrl/internal.h
+++ b/arch/x86/kernel/cpu/resctrl/internal.h
@@ -533,8 +533,6 @@ void rdtgroup_kn_unlock(struct kernfs_node *kn);
int rdtgroup_kn_mode_restrict(struct rdtgroup *r, const char *name);
int rdtgroup_kn_mode_restore(struct rdtgroup *r, const char *name,
umode_t mask);
-struct rdt_domain *rdt_find_domain(struct rdt_resource *r, int id,
- struct list_head **pos);
ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of,
char *buf, size_t nbytes, loff_t off);
int rdtgroup_schemata_show(struct kernfs_open_file *of,
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index f6a4b75f8122..c5fcbb524136 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -233,6 +233,8 @@ void resctrl_arch_sync_cpu_defaults(void *info);

/* The number of closid supported by this resource regardless of CDP */
u32 resctrl_arch_get_num_closid(struct rdt_resource *r);
+
+struct rdt_domain *resctrl_arch_find_domain(struct rdt_resource *r, int id);
int resctrl_arch_update_domains(struct rdt_resource *r, u32 closid);

/*
--
2.39.2