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KVM: split kvm_arch_set_memory_region into prepare and commit

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Required for SRCU convertion later.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Marcelo Tosatti
2009-12-23 14:35:18 -02:00
parent fef9cce0eb
commit f7784b8ec9
6 changed files with 82 additions and 47 deletions
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virt/kvm/kvm_main.c
+5 -7
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@@ -663,6 +663,10 @@ skip_lpage:
if (!npages)
kvm_arch_flush_shadow(kvm);
r = kvm_arch_prepare_memory_region(kvm, &new, old, mem, user_alloc);
if (r)
goto out_free;
spin_lock(&kvm->mmu_lock);
if (mem->slot >= kvm->memslots->nmemslots)
kvm->memslots->nmemslots = mem->slot + 1;
@@ -670,13 +674,7 @@ skip_lpage:
*memslot = new;
spin_unlock(&kvm->mmu_lock);
r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc);
if (r) {
spin_lock(&kvm->mmu_lock);
*memslot = old;
spin_unlock(&kvm->mmu_lock);
goto out_free;
}
kvm_arch_commit_memory_region(kvm, mem, old, user_alloc);
kvm_free_physmem_slot(&old, npages ? &new : NULL);
/* Slot deletion case: we have to update the current slot */