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KVM: x86: Free arrays for old memslot when moving memslot's base gfn 

Explicitly free the metadata arrays (stored in slot->arch) in the old
memslot structure when moving the memslot's base gfn is committed.  This
eliminates x86's dependency on kvm_free_memslot() being called when a
memslot move is committed, and paves the way for removing the funky code
in kvm_free_memslot() that conditionally frees structures based on its
@dont param.

Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2020-02-18 13:07:25 -08:00 committed by Paolo Bonzini
parent 9d4c197c0e
commit 21198846de
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kvm/x86.c
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@ -10066,6 +10066,10 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
*/
if (change != KVM_MR_DELETE)
kvm_mmu_slot_apply_flags(kvm, (struct kvm_memory_slot *) new);
/* Free the arrays associated with the old memslot. */
if (change == KVM_MR_MOVE)
kvm_arch_free_memslot(kvm, old, NULL);
}
void kvm_arch_flush_shadow_all(struct kvm *kvm)