diff options
Diffstat (limited to 'virt/kvm/kvm_mm.h')
| -rw-r--r-- | virt/kvm/kvm_mm.h | 49 |
1 files changed, 41 insertions, 8 deletions
diff --git a/virt/kvm/kvm_mm.h b/virt/kvm/kvm_mm.h index 715f19669d01..9fcc5d5b7f8d 100644 --- a/virt/kvm/kvm_mm.h +++ b/virt/kvm/kvm_mm.h @@ -20,8 +20,40 @@ #define KVM_MMU_UNLOCK(kvm) spin_unlock(&(kvm)->mmu_lock) #endif /* KVM_HAVE_MMU_RWLOCK */ -kvm_pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool interruptible, - bool *async, bool write_fault, bool *writable); + +struct kvm_follow_pfn { + const struct kvm_memory_slot *slot; + const gfn_t gfn; + + unsigned long hva; + + /* FOLL_* flags modifying lookup behavior, e.g. FOLL_WRITE. */ + unsigned int flags; + + /* + * Pin the page (effectively FOLL_PIN, which is an mm/ internal flag). + * The page *must* be pinned if KVM will write to the page via a kernel + * mapping, e.g. via kmap(), mremap(), etc. + */ + bool pin; + + /* + * If non-NULL, try to get a writable mapping even for a read fault. + * Set to true if a writable mapping was obtained. + */ + bool *map_writable; + + /* + * Optional output. Set to a valid "struct page" if the returned pfn + * is for a refcounted or pinned struct page, NULL if the returned pfn + * has no struct page or if the struct page is not being refcounted + * (e.g. tail pages of non-compound higher order allocations from + * IO/PFNMAP mappings). + */ + struct page **refcounted_page; +}; + +kvm_pfn_t hva_to_pfn(struct kvm_follow_pfn *kfp); #ifdef CONFIG_HAVE_KVM_PFNCACHE void gfn_to_pfn_cache_invalidate_start(struct kvm *kvm, @@ -35,18 +67,19 @@ static inline void gfn_to_pfn_cache_invalidate_start(struct kvm *kvm, } #endif /* HAVE_KVM_PFNCACHE */ -#ifdef CONFIG_KVM_PRIVATE_MEM -void kvm_gmem_init(struct module *module); +#ifdef CONFIG_KVM_GUEST_MEMFD +int kvm_gmem_init(struct module *module); +void kvm_gmem_exit(void); int kvm_gmem_create(struct kvm *kvm, struct kvm_create_guest_memfd *args); int kvm_gmem_bind(struct kvm *kvm, struct kvm_memory_slot *slot, unsigned int fd, loff_t offset); void kvm_gmem_unbind(struct kvm_memory_slot *slot); #else -static inline void kvm_gmem_init(struct module *module) +static inline int kvm_gmem_init(struct module *module) { - + return 0; } - +static inline void kvm_gmem_exit(void) {}; static inline int kvm_gmem_bind(struct kvm *kvm, struct kvm_memory_slot *slot, unsigned int fd, loff_t offset) @@ -59,6 +92,6 @@ static inline void kvm_gmem_unbind(struct kvm_memory_slot *slot) { WARN_ON_ONCE(1); } -#endif /* CONFIG_KVM_PRIVATE_MEM */ +#endif /* CONFIG_KVM_GUEST_MEMFD */ #endif /* __KVM_MM_H__ */ |