svm_onhyperv.c

Go to the documentation of this file.

// SPDX-License-Identifier: GPL-2.0-only
/*
 * KVM L1 hypervisor optimizations on Hyper-V for SVM.
 */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
#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_l2_tlb_flush(struct kvm_vcpu *vcpu)
{
    struct hv_vmcb_enlightenments *hve;
    hpa_t partition_assist_page = hv_get_partition_assist_page(vcpu);
 
    if (partition_assist_page == INVALID_PAGE)
        return -ENOMEM;
 
    hve = &to_svm(vcpu)->vmcb->control.hv_enlightenments;
 
    hve->partition_assist_page = partition_assist_page;
    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, HV_VMCB_NESTED_ENLIGHTENMENTS);
    }
 
    return 0;
}