Merge tag 'kvm-x86-mmu-6.14' of https://github.com/kvm-x86/linux into HEAD

KVM x86 MMU changes for 6.14:

 - Add a comment to kvm_mmu_do_page_fault() to explain why KVM performs a
   direct call to kvm_tdp_page_fault() when RETPOLINE is enabled.

Author: bonzini

arch/x86/kvm/mmu/mmu_internal.h

@@ -321,6 +321,10 @@ static inline int kvm_mmu_do_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
 		fault.slot = kvm_vcpu_gfn_to_memslot(vcpu, fault.gfn);
 	}
 
+	/*
+	 * With retpoline being active an indirect call is rather expensive,
+	 * so do a direct call in the most common case.
+	 */
 	if (IS_ENABLED(CONFIG_MITIGATION_RETPOLINE) && fault.is_tdp)
 		r = kvm_tdp_page_fault(vcpu, &fault);
 	else