KVM: Push rmap into kvm_arch_memory_slot
Two reasons:
- x86 can integrate rmap and rmap_pde and remove heuristics in
__gfn_to_rmap().
- Some architectures do not need rmap.
Since rmap is one of the most memory consuming stuff in KVM, ppc'd
better restrict the allocation to Book3S HV.
Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index bcf973e..14ec567 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -550,16 +550,12 @@
static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
{
- if (!dont || free->rmap != dont->rmap)
- vfree(free->rmap);
-
if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
kvm_destroy_dirty_bitmap(free);
kvm_arch_free_memslot(free, dont);
free->npages = 0;
- free->rmap = NULL;
}
void kvm_free_physmem(struct kvm *kvm)
@@ -768,11 +764,7 @@
if (npages && !old.npages) {
new.user_alloc = user_alloc;
new.userspace_addr = mem->userspace_addr;
-#ifndef CONFIG_S390
- new.rmap = vzalloc(npages * sizeof(*new.rmap));
- if (!new.rmap)
- goto out_free;
-#endif /* not defined CONFIG_S390 */
+
if (kvm_arch_create_memslot(&new, npages))
goto out_free;
}
@@ -831,7 +823,6 @@
/* actual memory is freed via old in kvm_free_physmem_slot below */
if (!npages) {
- new.rmap = NULL;
new.dirty_bitmap = NULL;
memset(&new.arch, 0, sizeof(new.arch));
}