KVM: Portability: Move unalias_gfn to arch dependent file

[powerpc.git] / drivers / kvm / x86.c

diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c
index 7237cb2..2be5936 100644 (file)
--- a/drivers/kvm/x86.c
+++ b/drivers/kvm/x86.c
@@ -1119,6 +1119,20 @@ static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
        return kvm->n_alloc_mmu_pages;
 }
 
+gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
+{
+       int i;
+       struct kvm_mem_alias *alias;
+
+       for (i = 0; i < kvm->naliases; ++i) {
+               alias = &kvm->aliases[i];
+               if (gfn >= alias->base_gfn
+                   && gfn < alias->base_gfn + alias->npages)
+                       return alias->target_gfn + gfn - alias->base_gfn;
+       }
+       return gfn;
+}
+
 /*
  * Set a new alias region.  Aliases map a portion of physical memory into
  * another portion.  This is useful for memory windows, for example the PC