// SPDX-License-Identifier: GPL-2.0-only /* * KVM L1 hypervisor optimizations on Hyper-V for SVM. */ #include <linux/kvm_host.h> #include <asm/mshyperv.h> #include "svm.h" #include "svm_ops.h" #include "hyperv.h" #include "kvm_onhyperv.h" #include "svm_onhyperv.h" int svm_hv_enable_direct_tlbflush(struct kvm_vcpu *vcpu) { struct hv_enlightenments *hve; struct hv_partition_assist_pg **p_hv_pa_pg = &to_kvm_hv(vcpu->kvm)->hv_pa_pg; if (!*p_hv_pa_pg) *p_hv_pa_pg = kzalloc(PAGE_SIZE, GFP_KERNEL); if (!*p_hv_pa_pg) return -ENOMEM; hve = (struct hv_enlightenments *)to_svm(vcpu)->vmcb->control.reserved_sw; hve->partition_assist_page = __pa(*p_hv_pa_pg); hve->hv_vm_id = (unsigned long)vcpu->kvm; if (!hve->hv_enlightenments_control.nested_flush_hypercall) { hve->hv_enlightenments_control.nested_flush_hypercall = 1; vmcb_mark_dirty(to_svm(vcpu)->vmcb, VMCB_HV_NESTED_ENLIGHTENMENTS); } return 0; }