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Message-ID: <20240605161427.312994-4-tony.luck@intel.com>
Date: Wed, 5 Jun 2024 09:14:27 -0700
From: Tony Luck <tony.luck@...el.com>
To: Borislav Petkov <bp@...en8.de>
Cc: x86@...nel.org,
Fenghua Yu <fenghua.yu@...el.com>,
Reinette Chatre <reinette.chatre@...el.com>,
Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>,
Peter Newman <peternewman@...gle.com>,
James Morse <james.morse@....com>,
Babu Moger <babu.moger@....com>,
Drew Fustini <dfustini@...libre.com>,
Dave Martin <Dave.Martin@....com>,
linux-kernel@...r.kernel.org,
patches@...ts.linux.dev,
Tony Luck <tony.luck@...el.com>
Subject: [PATCH v2 3/3] x86/resctrl: Replace open code cacheinfo search in rdtgroup_cbm_to_size()
Use get_cpu_cacheinfo_level() instead of open coded search.
Signed-off-by: Tony Luck <tony.luck@...el.com>
Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>
---
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 14 +++++---------
1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index 02f213f1c51c..cb68a121dabb 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -1450,18 +1450,14 @@ static ssize_t rdtgroup_mode_write(struct kernfs_open_file *of,
unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r,
struct rdt_domain *d, unsigned long cbm)
{
- struct cpu_cacheinfo *ci;
unsigned int size = 0;
- int num_b, i;
+ struct cacheinfo *ci;
+ int num_b;
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++) {
- if (ci->info_list[i].level == r->cache_level) {
- size = ci->info_list[i].size / r->cache.cbm_len * num_b;
- break;
- }
- }
+ ci = get_cpu_cacheinfo_level(cpumask_any(&d->cpu_mask), r->cache_level);
+ if (ci)
+ size = ci->size / r->cache.cbm_len * num_b;
return size;
}
--
2.45.0
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