KVM: Drop gfn_to_pfn() APIs now that all users are gone

Drop gfn_to_pfn() and all its variants now that all users are gone.

No functional change intended.

Tested-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20241010182427.1434605-80-seanjc@google.com>

Author: sean-jc

include/linux/kvm_host.h

@@ -1274,14 +1274,6 @@ static inline kvm_pfn_t kvm_faultin_pfn(struct kvm_vcpu *vcpu, gfn_t gfn,
 				 write ? FOLL_WRITE : 0, writable, refcounted_page);
 }
 
-kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
-kvm_pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
-		      bool *writable);
-kvm_pfn_t gfn_to_pfn_memslot(const struct kvm_memory_slot *slot, gfn_t gfn);
-kvm_pfn_t __gfn_to_pfn_memslot(const struct kvm_memory_slot *slot, gfn_t gfn,
-			       bool interruptible, bool no_wait,
-			       bool write_fault, bool *writable);
-
 void kvm_release_pfn_clean(kvm_pfn_t pfn);
 void kvm_release_pfn_dirty(kvm_pfn_t pfn);
 void kvm_set_pfn_dirty(kvm_pfn_t pfn);

virt/kvm/kvm_main.c

@@ -3039,59 +3039,6 @@ static kvm_pfn_t kvm_follow_pfn(struct kvm_follow_pfn *kfp)
 	return hva_to_pfn(kfp);
 }
 
-kvm_pfn_t __gfn_to_pfn_memslot(const struct kvm_memory_slot *slot, gfn_t gfn,
-			       bool interruptible, bool no_wait,
-			       bool write_fault, bool *writable)
-{
-	struct kvm_follow_pfn kfp = {
-		.slot = slot,
-		.gfn = gfn,
-		.map_writable = writable,
-	};
-
-	if (write_fault)
-		kfp.flags |= FOLL_WRITE;
-	if (no_wait)
-		kfp.flags |= FOLL_NOWAIT;
-	if (interruptible)
-		kfp.flags |= FOLL_INTERRUPTIBLE;
-
-	return kvm_follow_pfn(&kfp);
-}
-EXPORT_SYMBOL_GPL(__gfn_to_pfn_memslot);
-
-kvm_pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
-		      bool *writable)
-{
-	struct kvm_follow_pfn kfp = {
-		.slot = gfn_to_memslot(kvm, gfn),
-		.gfn = gfn,
-		.flags = write_fault ? FOLL_WRITE : 0,
-		.map_writable = writable,
-	};
-
-	return kvm_follow_pfn(&kfp);
-}
-EXPORT_SYMBOL_GPL(gfn_to_pfn_prot);
-
-kvm_pfn_t gfn_to_pfn_memslot(const struct kvm_memory_slot *slot, gfn_t gfn)
-{
-	struct kvm_follow_pfn kfp = {
-		.slot = slot,
-		.gfn = gfn,
-		.flags = FOLL_WRITE,
-	};
-
-	return kvm_follow_pfn(&kfp);
-}
-EXPORT_SYMBOL_GPL(gfn_to_pfn_memslot);
-
-kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn)
-{
-	return gfn_to_pfn_memslot(gfn_to_memslot(kvm, gfn), gfn);
-}
-EXPORT_SYMBOL_GPL(gfn_to_pfn);
-
 kvm_pfn_t __kvm_faultin_pfn(const struct kvm_memory_slot *slot, gfn_t gfn,
 			    unsigned int foll, bool *writable,
 			    struct page **refcounted_page)