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2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
#ifndef __LINUX_CPU_RMAP_H
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#define __LINUX_CPU_RMAP_H
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/*
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* cpu_rmap.c: CPU affinity reverse-map support
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* Copyright 2011 Solarflare Communications Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation, incorporated herein by reference.
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*/
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#include <linux/cpumask.h>
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#include <linux/gfp.h>
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#include <linux/slab.h>
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#include <linux/kref.h>
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/**
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* struct cpu_rmap - CPU affinity reverse-map
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* @refcount: kref for object
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* @size: Number of objects to be reverse-mapped
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* @used: Number of objects added
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* @obj: Pointer to array of object pointers
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* @near: For each CPU, the index and distance to the nearest object,
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* based on affinity masks
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*/
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struct cpu_rmap {
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struct kref refcount;
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u16 size, used;
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void **obj;
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struct {
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u16 index;
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u16 dist;
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} near[0];
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};
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#define CPU_RMAP_DIST_INF 0xffff
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extern struct cpu_rmap *alloc_cpu_rmap(unsigned int size, gfp_t flags);
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extern int cpu_rmap_put(struct cpu_rmap *rmap);
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extern int cpu_rmap_add(struct cpu_rmap *rmap, void *obj);
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extern int cpu_rmap_update(struct cpu_rmap *rmap, u16 index,
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const struct cpumask *affinity);
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static inline u16 cpu_rmap_lookup_index(struct cpu_rmap *rmap, unsigned int cpu)
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{
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return rmap->near[cpu].index;
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}
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static inline void *cpu_rmap_lookup_obj(struct cpu_rmap *rmap, unsigned int cpu)
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{
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return rmap->obj[rmap->near[cpu].index];
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}
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/**
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* alloc_irq_cpu_rmap - allocate CPU affinity reverse-map for IRQs
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* @size: Number of objects to be mapped
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*
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* Must be called in process context.
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*/
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static inline struct cpu_rmap *alloc_irq_cpu_rmap(unsigned int size)
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{
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return alloc_cpu_rmap(size, GFP_KERNEL);
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}
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extern void free_irq_cpu_rmap(struct cpu_rmap *rmap);
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extern int irq_cpu_rmap_add(struct cpu_rmap *rmap, int irq);
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#endif /* __LINUX_CPU_RMAP_H */
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