Add RESCTRL_NODE to the enum, and to the helper function that looks
up a domain id from a scope.
There are a couple of places where the scope must be a cache scope.
Add some defensive WARN_ON checks to those.
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
---
include/linux/resctrl.h | 1 +
arch/x86/kernel/cpu/resctrl/core.c | 3 +++
arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 4 ++++
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 3 +++
4 files changed, 11 insertions(+)
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index 2155dc15e636..e3cddf3f07f8 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -147,6 +147,7 @@ struct resctrl_schema;
enum resctrl_scope {
RESCTRL_L2_CACHE = 2,
RESCTRL_L3_CACHE = 3,
+ RESCTRL_NODE,
};
/**
diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index 59e6aa7abef5..b741cbf61843 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -505,6 +505,9 @@ static int get_domain_id_from_scope(int cpu, enum resctrl_scope scope)
case RESCTRL_L2_CACHE:
case RESCTRL_L3_CACHE:
return get_cpu_cacheinfo_id(cpu, scope);
+ case RESCTRL_NODE:
+ return cpu_to_node(cpu);
+
default:
break;
}
diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
index 6a72fb627aa5..2bafc73b51e2 100644
--- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
+++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
@@ -292,10 +292,14 @@ static void pseudo_lock_region_clear(struct pseudo_lock_region *plr)
*/
static int pseudo_lock_region_init(struct pseudo_lock_region *plr)
{
+ enum resctrl_scope scope = plr->s->res->scope;
struct cpu_cacheinfo *ci;
int ret;
int i;
+ if (WARN_ON_ONCE(scope != RESCTRL_L2_CACHE && scope != RESCTRL_L3_CACHE))
+ return -ENODEV;
+
/* Pick the first cpu we find that is associated with the cache. */
plr->cpu = cpumask_first(&plr->d->cpu_mask);
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index eff9d87547c9..770f2bf98462 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -1413,6 +1413,9 @@ unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r,
unsigned int size = 0;
int num_b, i;
+ if (WARN_ON_ONCE(r->scope != RESCTRL_L2_CACHE && r->scope != RESCTRL_L3_CACHE))
+ return size;
+
num_b = bitmap_weight(&cbm, r->cache.cbm_len);
ci = get_cpu_cacheinfo(cpumask_any(&d->cpu_mask));
for (i = 0; i < ci->num_leaves; i++) {
--
2.43.0
