add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/s390/include/asm/gmap.h
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@@ -9,6 +9,9 @@
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 #ifndef _ASM_S390_GMAP_H
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 #define _ASM_S390_GMAP_H
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+#include <linux/radix-tree.h>
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+#include <linux/refcount.h>
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+
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 /* Generic bits for GMAP notification on DAT table entry changes. */
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 #define GMAP_NOTIFY_SHADOW	0x2
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 #define GMAP_NOTIFY_MPROT	0x1
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@@ -29,6 +32,7 @@
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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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+ * @guest_handle: protected virtual machine handle for the ultravisor
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  * @host_to_rmap: radix tree with gmap_rmap lists
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  * @children: list of shadow gmap structures
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  * @pt_list: list of all page tables used in the shadow guest address space
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@@ -46,12 +50,14 @@
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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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-	atomic_t ref_count;
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+	refcount_t ref_count;
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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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+	/* only set for protected virtual machines */
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+	unsigned long guest_handle;
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 	/* Additional data for shadow guest address spaces */
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 	struct radix_tree_root host_to_rmap;
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 	struct list_head children;
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@@ -134,12 +140,14 @@
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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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-		     unsigned long bits);
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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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 void gmap_sync_dirty_log_pmd(struct gmap *gmap, unsigned long dirty_bitmap[4],
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 			     unsigned long gaddr, unsigned long vmaddr);
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+int gmap_mark_unmergeable(void);
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+void s390_reset_acc(struct mm_struct *mm);
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+void s390_unlist_old_asce(struct gmap *gmap);
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+int s390_replace_asce(struct gmap *gmap);
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 #endif /* _ASM_S390_GMAP_H */