#include <linux/sched.h>
#include <linux/mm_types.h>
#include <linux/page-flags.h>
+#include <linux/radix-tree.h>
#include <asm/bug.h>
#include <asm/page.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
- * @crst_list: list of all crst tables used in the guest address space
* @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;
- struct list_head crst_list;
bool pfault_enabled;
};
/**
- * struct gmap_rmap - reverse mapping for segment table entries
- * @gmap: pointer to the gmap_struct
- * @entry: pointer to a segment table entry
- * @vmaddr: virtual address in the guest address space
- */
-struct gmap_rmap {
- struct list_head list;
- struct gmap *gmap;
- unsigned long *entry;
- unsigned long vmaddr;
-};
-
-/**
- * struct gmap_pgtable - gmap information attached to a page table
- * @vmaddr: address of the 1MB segment in the process virtual memory
- * @mapper: list of segment table entries mapping a page table
- */
-struct gmap_pgtable {
- unsigned long vmaddr;
- struct list_head mapper;
-};
-
-/**
* 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 address);
+ void (*notifier_call)(struct gmap *gmap, unsigned long gaddr);
};
-struct gmap *gmap_alloc(struct mm_struct *mm);
+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(unsigned long address, struct gmap *);
-unsigned long gmap_translate(unsigned long address, struct gmap *);
-unsigned long __gmap_fault(unsigned long address, struct gmap *);
-unsigned long gmap_fault(unsigned long address, struct gmap *);
-void gmap_discard(unsigned long from, unsigned long to, struct gmap *);
-void __gmap_zap(unsigned long address, struct gmap *);
+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);
bool gmap_test_and_clear_dirty(unsigned long address, struct gmap *);
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);
-void gmap_do_ipte_notify(struct mm_struct *, pte_t *);
+void gmap_do_ipte_notify(struct mm_struct *, unsigned long addr, pte_t *);
static inline pgste_t pgste_ipte_notify(struct mm_struct *mm,
+ unsigned long addr,
pte_t *ptep, pgste_t pgste)
{
#ifdef CONFIG_PGSTE
if (pgste_val(pgste) & PGSTE_IN_BIT) {
pgste_val(pgste) &= ~PGSTE_IN_BIT;
- gmap_do_ipte_notify(mm, ptep);
+ gmap_do_ipte_notify(mm, addr, ptep);
}
#endif
return pgste;
pgste_val(pgste) &= ~PGSTE_UC_BIT;
pte = *ptep;
if (dirty && (pte_val(pte) & _PAGE_PRESENT)) {
- pgste = pgste_ipte_notify(mm, ptep, pgste);
+ pgste = pgste_ipte_notify(mm, addr, ptep, pgste);
__ptep_ipte(addr, ptep);
if (MACHINE_HAS_ESOP || !(pte_val(pte) & _PAGE_WRITE))
pte_val(pte) |= _PAGE_PROTECT;
if (mm_has_pgste(vma->vm_mm)) {
pgste = pgste_get_lock(ptep);
- pgste = pgste_ipte_notify(vma->vm_mm, ptep, pgste);
+ pgste = pgste_ipte_notify(vma->vm_mm, addr, ptep, pgste);
}
oldpte = pte = *ptep;
if (mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
- pgste = pgste_ipte_notify(mm, ptep, pgste);
+ pgste = pgste_ipte_notify(mm, address, ptep, pgste);
}
pte = *ptep;
if (mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
- pgste_ipte_notify(mm, ptep, pgste);
+ pgste_ipte_notify(mm, address, ptep, pgste);
}
pte = *ptep;
if (mm_has_pgste(vma->vm_mm)) {
pgste = pgste_get_lock(ptep);
- pgste = pgste_ipte_notify(vma->vm_mm, ptep, pgste);
+ pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste);
}
pte = *ptep;
if (!full && mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
- pgste = pgste_ipte_notify(mm, ptep, pgste);
+ pgste = pgste_ipte_notify(mm, address, ptep, pgste);
}
pte = *ptep;
if (pte_write(pte)) {
if (mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
- pgste = pgste_ipte_notify(mm, ptep, pgste);
+ pgste = pgste_ipte_notify(mm, address, ptep, pgste);
}
ptep_flush_lazy(mm, address, ptep);
return 0;
if (mm_has_pgste(vma->vm_mm)) {
pgste = pgste_get_lock(ptep);
- pgste = pgste_ipte_notify(vma->vm_mm, ptep, pgste);
+ pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste);
}
ptep_flush_direct(vma->vm_mm, address, ptep);
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