2016-03-08 17:49:57 +07:00
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/*
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* KVM guest address space mapping code
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*
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* Copyright IBM Corp. 2007, 2016
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
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*/
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#ifndef _ASM_S390_GMAP_H
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#define _ASM_S390_GMAP_H
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/**
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* struct gmap_struct - guest address space
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* @crst_list: list of all crst tables used in the guest address space
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* @mm: pointer to the parent mm_struct
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* @guest_to_host: radix tree with guest to host address translation
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* @host_to_guest: radix tree with pointer to segment table entries
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* @guest_table_lock: spinlock to protect all entries in the guest page table
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* @table: pointer to the page directory
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* @asce: address space control element for gmap page table
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* @pfault_enabled: defines if pfaults are applicable for the guest
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*/
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struct gmap {
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struct list_head list;
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struct list_head crst_list;
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struct mm_struct *mm;
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struct radix_tree_root guest_to_host;
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struct radix_tree_root host_to_guest;
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spinlock_t guest_table_lock;
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unsigned long *table;
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unsigned long asce;
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unsigned long asce_end;
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void *private;
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bool pfault_enabled;
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};
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/**
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* struct gmap_notifier - notify function block for page invalidation
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* @notifier_call: address of callback function
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*/
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struct gmap_notifier {
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struct list_head list;
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2016-03-08 17:54:14 +07:00
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struct rcu_head rcu;
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2016-03-08 17:52:54 +07:00
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void (*notifier_call)(struct gmap *gmap, unsigned long start,
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unsigned long end);
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2016-03-08 17:49:57 +07:00
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};
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struct gmap *gmap_alloc(struct mm_struct *mm, unsigned long limit);
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void gmap_free(struct gmap *gmap);
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void gmap_enable(struct gmap *gmap);
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void gmap_disable(struct gmap *gmap);
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int gmap_map_segment(struct gmap *gmap, unsigned long from,
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unsigned long to, unsigned long len);
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int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len);
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unsigned long __gmap_translate(struct gmap *, unsigned long gaddr);
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unsigned long gmap_translate(struct gmap *, unsigned long gaddr);
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int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr);
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int gmap_fault(struct gmap *, unsigned long gaddr, unsigned int fault_flags);
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void gmap_discard(struct gmap *, unsigned long from, unsigned long to);
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void __gmap_zap(struct gmap *, unsigned long gaddr);
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void gmap_unlink(struct mm_struct *, unsigned long *table, unsigned long vmaddr);
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2016-03-08 17:54:42 +07:00
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void gmap_register_pte_notifier(struct gmap_notifier *);
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void gmap_unregister_pte_notifier(struct gmap_notifier *);
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void gmap_pte_notify(struct mm_struct *, unsigned long addr, pte_t *);
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int gmap_mprotect_notify(struct gmap *, unsigned long start,
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unsigned long len, int prot);
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2016-03-08 17:49:57 +07:00
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#endif /* _ASM_S390_GMAP_H */
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