42 lines
958 B
C
42 lines
958 B
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* KVM L1 hypervisor optimizations on Hyper-V for SVM.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kvm_host.h>
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#include <asm/mshyperv.h>
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#include "svm.h"
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#include "svm_ops.h"
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#include "hyperv.h"
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#include "kvm_onhyperv.h"
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#include "svm_onhyperv.h"
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int svm_hv_enable_l2_tlb_flush(struct kvm_vcpu *vcpu)
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{
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struct hv_vmcb_enlightenments *hve;
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struct hv_partition_assist_pg **p_hv_pa_pg =
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&to_kvm_hv(vcpu->kvm)->hv_pa_pg;
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if (!*p_hv_pa_pg)
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*p_hv_pa_pg = kzalloc(PAGE_SIZE, GFP_KERNEL);
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if (!*p_hv_pa_pg)
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return -ENOMEM;
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hve = &to_svm(vcpu)->vmcb->control.hv_enlightenments;
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hve->partition_assist_page = __pa(*p_hv_pa_pg);
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hve->hv_vm_id = (unsigned long)vcpu->kvm;
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if (!hve->hv_enlightenments_control.nested_flush_hypercall) {
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hve->hv_enlightenments_control.nested_flush_hypercall = 1;
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vmcb_mark_dirty(to_svm(vcpu)->vmcb, HV_VMCB_NESTED_ENLIGHTENMENTS);
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}
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return 0;
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}
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