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089fe572a2
Move Hyper-V's VMCB enlightenment definitions to the TLFS header; the definitions come directly from the TLFS[*], not from KVM. No functional change intended. [*] https://learn.microsoft.com/en-us/virtualization/hyper-v-on-windows/tlfs/datatypes/hv_svm_enlightened_vmcb_fields [vitaly: rename VMCB_HV_ -> HV_VMCB_ to match the rest of hyperv-tlfs.h, keep svm/hyperv.h] Signed-off-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20221101145426.251680-2-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
41 lines
933 B
C
41 lines
933 B
C
// 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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#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_direct_tlbflush(struct kvm_vcpu *vcpu)
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{
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struct hv_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 = (struct hv_enlightenments *)to_svm(vcpu)->vmcb->control.reserved_sw;
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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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