diff options
Diffstat (limited to 'arch/x86/kernel/cpu/resctrl')
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/monitor.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c index fe1a2aa53c16..4b2b539ddff9 100644 --- a/arch/x86/kernel/cpu/resctrl/monitor.c +++ b/arch/x86/kernel/cpu/resctrl/monitor.c @@ -243,14 +243,20 @@ int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_mon_domain *d, u64 *val, void *ignored) { struct rdt_hw_mon_domain *hw_dom = resctrl_to_arch_mon_dom(d); - int cpu = cpumask_any(&d->hdr.cpu_mask); struct arch_mbm_state *am; u64 msr_val; u32 prmid; + int cpu; int ret; resctrl_arch_rmid_read_context_check(); + if (cpumask_empty(&d->hdr.cpu_mask)) { + pr_warn_once("Domain %d has no CPUs\n", d->hdr.id); + return -EINVAL; + } + + cpu = cpumask_any(&d->hdr.cpu_mask); prmid = logical_rmid_to_physical_rmid(cpu, rmid); ret = __rmid_read_phys(prmid, eventid, &msr_val); |