mirror of https://gitee.com/openkylin/linux.git
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
/*
|
|
* KVM guest address space mapping code
|
|
*
|
|
* Copyright IBM Corp. 2007, 2016
|
|
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
|
|
*/
|
|
|
|
#ifndef _ASM_S390_GMAP_H
|
|
#define _ASM_S390_GMAP_H
|
|
|
|
/**
|
|
* struct gmap_struct - guest address space
|
|
* @crst_list: list of all crst tables used in the guest address space
|
|
* @mm: pointer to the parent mm_struct
|
|
* @guest_to_host: radix tree with guest to host address translation
|
|
* @host_to_guest: radix tree with pointer to segment table entries
|
|
* @guest_table_lock: spinlock to protect all entries in the guest page table
|
|
* @table: pointer to the page directory
|
|
* @asce: address space control element for gmap page table
|
|
* @pfault_enabled: defines if pfaults are applicable for the guest
|
|
*/
|
|
struct gmap {
|
|
struct list_head list;
|
|
struct list_head crst_list;
|
|
struct mm_struct *mm;
|
|
struct radix_tree_root guest_to_host;
|
|
struct radix_tree_root host_to_guest;
|
|
spinlock_t guest_table_lock;
|
|
unsigned long *table;
|
|
unsigned long asce;
|
|
unsigned long asce_end;
|
|
void *private;
|
|
bool pfault_enabled;
|
|
};
|
|
|
|
/**
|
|
* struct gmap_notifier - notify function block for page invalidation
|
|
* @notifier_call: address of callback function
|
|
*/
|
|
struct gmap_notifier {
|
|
struct list_head list;
|
|
void (*notifier_call)(struct gmap *gmap, unsigned long gaddr);
|
|
};
|
|
|
|
struct gmap *gmap_alloc(struct mm_struct *mm, unsigned long limit);
|
|
void gmap_free(struct gmap *gmap);
|
|
void gmap_enable(struct gmap *gmap);
|
|
void gmap_disable(struct gmap *gmap);
|
|
int gmap_map_segment(struct gmap *gmap, unsigned long from,
|
|
unsigned long to, unsigned long len);
|
|
int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len);
|
|
unsigned long __gmap_translate(struct gmap *, unsigned long gaddr);
|
|
unsigned long gmap_translate(struct gmap *, unsigned long gaddr);
|
|
int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr);
|
|
int gmap_fault(struct gmap *, unsigned long gaddr, unsigned int fault_flags);
|
|
void gmap_discard(struct gmap *, unsigned long from, unsigned long to);
|
|
void __gmap_zap(struct gmap *, unsigned long gaddr);
|
|
void gmap_unlink(struct mm_struct *, unsigned long *table, unsigned long vmaddr);
|
|
|
|
void gmap_register_ipte_notifier(struct gmap_notifier *);
|
|
void gmap_unregister_ipte_notifier(struct gmap_notifier *);
|
|
int gmap_ipte_notify(struct gmap *, unsigned long start, unsigned long len);
|
|
|
|
#endif /* _ASM_S390_GMAP_H */
|