forked from Minki/linux
x86/xen: create stubs for HVM-only builds in page.h
__pfn_to_mfn() is only used from PV code (mmu_pv.c, p2m.c) and from page.h where all functions calling it check for xen_feature(XENFEAT_auto_translated_physmap) first so we can replace it with any stub to make build happy. set_foreign_p2m_mapping()/clear_foreign_p2m_mapping() are used from grant-table.c but only if !xen_feature(XENFEAT_auto_translated_physmap). Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
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@ -52,12 +52,30 @@ extern bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
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extern unsigned long __init set_phys_range_identity(unsigned long pfn_s,
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unsigned long pfn_e);
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#ifdef CONFIG_XEN_PV
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extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
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struct gnttab_map_grant_ref *kmap_ops,
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struct page **pages, unsigned int count);
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extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
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struct gnttab_unmap_grant_ref *kunmap_ops,
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struct page **pages, unsigned int count);
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#else
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static inline int
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set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
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struct gnttab_map_grant_ref *kmap_ops,
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struct page **pages, unsigned int count)
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{
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return 0;
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}
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static inline int
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clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
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struct gnttab_unmap_grant_ref *kunmap_ops,
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struct page **pages, unsigned int count)
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{
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return 0;
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}
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#endif
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/*
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* Helper functions to write or read unsigned long values to/from
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@ -73,6 +91,7 @@ static inline int xen_safe_read_ulong(unsigned long *addr, unsigned long *val)
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return __get_user(*val, (unsigned long __user *)addr);
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}
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#ifdef CONFIG_XEN_PV
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/*
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* When to use pfn_to_mfn(), __pfn_to_mfn() or get_phys_to_machine():
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* - pfn_to_mfn() returns either INVALID_P2M_ENTRY or the mfn. No indicator
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@ -99,6 +118,12 @@ static inline unsigned long __pfn_to_mfn(unsigned long pfn)
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return mfn;
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}
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#else
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static inline unsigned long __pfn_to_mfn(unsigned long pfn)
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{
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return pfn;
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}
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#endif
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static inline unsigned long pfn_to_mfn(unsigned long pfn)
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{
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