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x86/resctrl: Move L3 initialization into new helper function

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Carve out the resource monitoring domain init code into a separate helper in
order to be able to initialize new types of monitoring domains besides the
usual L3 ones.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/20251217172121.12030-1-tony.luck@intel.com
This commit is contained in:
Tony Luck 2025-12-17 09:20:49 -08:00 committed by Borislav Petkov (AMD)
parent 03eb578b37
commit 0d6447623d
1 changed files with 34 additions and 30 deletions
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64
arch/x86/kernel/cpu/resctrl/core.c
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@ -501,37 +501,13 @@ static void domain_add_cpu_ctrl(int cpu, struct rdt_resource *r)
}
}
static void domain_add_cpu_mon(int cpu, struct rdt_resource *r)
static void l3_mon_domain_setup(int cpu, int id, struct rdt_resource *r, struct list_head *add_pos)
{
int id = get_domain_id_from_scope(cpu, r->mon_scope);
struct list_head *add_pos = NULL;
struct rdt_hw_mon_domain *hw_dom;
struct rdt_domain_hdr *hdr;
struct rdt_mon_domain *d;
struct cacheinfo *ci;
int err;
lockdep_assert_held(&domain_list_lock);
if (id < 0) {
pr_warn_once("Can't find monitor domain id for CPU:%d scope:%d for resource %s\n",
cpu, r->mon_scope, r->name);
return;
}
hdr = resctrl_find_domain(&r->mon_domains, id, &add_pos);
if (hdr) {
if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, r->rid))
return;
d = container_of(hdr, struct rdt_mon_domain, hdr);
cpumask_set_cpu(cpu, &d->hdr.cpu_mask);
/* Update the mbm_assign_mode state for the CPU if supported */
if (r->mon.mbm_cntr_assignable)
resctrl_arch_mbm_cntr_assign_set_one(r);
return;
}
hw_dom = kzalloc_node(sizeof(*hw_dom), GFP_KERNEL, cpu_to_node(cpu));
if (!hw_dom)
return;
@ -539,7 +515,7 @@ static void domain_add_cpu_mon(int cpu, struct rdt_resource *r)
d = &hw_dom->d_resctrl;
d->hdr.id = id;
d->hdr.type = RESCTRL_MON_DOMAIN;
d->hdr.rid = r->rid;
d->hdr.rid = RDT_RESOURCE_L3;
ci = get_cpu_cacheinfo_level(cpu, RESCTRL_L3_CACHE);
if (!ci) {
pr_warn_once("Can't find L3 cache for CPU:%d resource %s\n", cpu, r->name);
@ -549,10 +525,6 @@ static void domain_add_cpu_mon(int cpu, struct rdt_resource *r)
d->ci_id = ci->id;
cpumask_set_cpu(cpu, &d->hdr.cpu_mask);
/* Update the mbm_assign_mode state for the CPU if supported */
if (r->mon.mbm_cntr_assignable)
resctrl_arch_mbm_cntr_assign_set_one(r);
arch_mon_domain_online(r, d);
if (arch_domain_mbm_alloc(r->mon.num_rmid, hw_dom)) {
@ -570,6 +542,38 @@ static void domain_add_cpu_mon(int cpu, struct rdt_resource *r)
}
}
static void domain_add_cpu_mon(int cpu, struct rdt_resource *r)
{
int id = get_domain_id_from_scope(cpu, r->mon_scope);
struct list_head *add_pos = NULL;
struct rdt_domain_hdr *hdr;
lockdep_assert_held(&domain_list_lock);
if (id < 0) {
pr_warn_once("Can't find monitor domain id for CPU:%d scope:%d for resource %s\n",
cpu, r->mon_scope, r->name);
return;
}
hdr = resctrl_find_domain(&r->mon_domains, id, &add_pos);
if (hdr)
cpumask_set_cpu(cpu, &hdr->cpu_mask);
switch (r->rid) {
case RDT_RESOURCE_L3:
/* Update the mbm_assign_mode state for the CPU if supported */
if (r->mon.mbm_cntr_assignable)
resctrl_arch_mbm_cntr_assign_set_one(r);
if (!hdr)
l3_mon_domain_setup(cpu, id, r, add_pos);
break;
default:
pr_warn_once("Unknown resource rid=%d\n", r->rid);
break;
}
}
static void domain_add_cpu(int cpu, struct rdt_resource *r)
{
if (r->alloc_capable)