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x86/intel_rdt: Global closid helper to support future fixes
The number of CLOSIDs supported by a system is the minimum number of CLOSIDs supported by any of its resources. Care should be taken when iterating over the CLOSIDs of a resource since it may be that the number of CLOSIDs supported on the system is less than the number of CLOSIDs supported by the resource. Introduce a helper function that can be used to query the number of CLOSIDs that is supported by all resources, irrespective of how many CLOSIDs are supported by a particular resource. Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: "H Peter Anvin" <hpa@zytor.com> Cc: "Tony Luck" <tony.luck@intel.com> Cc: "Xiaochen Shen" <xiaochen.shen@intel.com> Cc: "Chen Yu" <yu.c.chen@intel.com> Link: https://lkml.kernel.org/r/1537048707-76280-4-git-send-email-fenghua.yu@intel.com
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@ -544,6 +544,7 @@ int rdtgroup_pseudo_lock_create(struct rdtgroup *rdtgrp);
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void rdtgroup_pseudo_lock_remove(struct rdtgroup *rdtgrp);
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struct rdt_domain *get_domain_from_cpu(int cpu, struct rdt_resource *r);
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int update_domains(struct rdt_resource *r, int closid);
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int closids_supported(void);
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void closid_free(int closid);
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int alloc_rmid(void);
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void free_rmid(u32 rmid);
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@ -97,6 +97,12 @@ void rdt_last_cmd_printf(const char *fmt, ...)
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* limited as the number of resources grows.
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*/
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static int closid_free_map;
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static int closid_free_map_len;
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int closids_supported(void)
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{
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return closid_free_map_len;
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}
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static void closid_init(void)
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{
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@ -111,6 +117,7 @@ static void closid_init(void)
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/* CLOSID 0 is always reserved for the default group */
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closid_free_map &= ~1;
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closid_free_map_len = rdt_min_closid;
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}
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static int closid_alloc(void)
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