Re: [patch 3/5] KVM: MMU: add kvm_mmu_shadow_walk helper

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Marcelo Tosatti wrote:
Required by EPT misconfiguration handler.

Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>

Index: kvm/arch/x86/kvm/mmu.c
===================================================================
--- kvm.orig/arch/x86/kvm/mmu.c
+++ kvm/arch/x86/kvm/mmu.c
@@ -3013,6 +3013,26 @@ out:
 	return r;
 }
+void kvm_mmu_shadow_walk(struct kvm_vcpu *vcpu, u64 addr,
+			 struct mmu_shadow_walk *walk)
+{
+	struct kvm_shadow_walk_iterator iterator;
+
+	spin_lock(&vcpu->kvm->mmu_lock);
+	for_each_shadow_entry(vcpu, addr, iterator) {
+		int err;
+
+		err = walk->fn(vcpu, iterator.sptep, iterator.level, walk);
+		if (err)
+			break;
+
+		if (!is_shadow_present_pte(*iterator.sptep))
+			break;
+	}
+	spin_unlock(&vcpu->kvm->mmu_lock);
+}
+EXPORT_SYMBOL(kvm_mmu_shadow_walk);
+

Isn't it simpler to invoke for_each_shadow_entry(), instead of defining a callback and calling it?

We had those callbacks once, then switched to for_each.


--
error compiling committee.c: too many arguments to function

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