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KVM: x86: make Hyper-V PV TLB flush use tlb_flush_guest()

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Hyper-V PV TLB flush mechanism does TLB flush on behalf of the guest
so doing tlb_flush_all() is an overkill, switch to using tlb_flush_guest()
(just like KVM PV TLB flush mechanism) instead. Introduce
KVM_REQ_HV_TLB_FLUSH to support the change.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov
2020-03-25 12:28:24 -04:00
committed by Paolo Bonzini
parent e64419d991
commit 0baedd7927
3 changed files with 12 additions and 3 deletions
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3
arch/x86/kvm/hyperv.c
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@@ -1425,8 +1425,7 @@ static u64 kvm_hv_flush_tlb(struct kvm_vcpu *current_vcpu, u64 ingpa,
* vcpu->arch.cr3 may not be up-to-date for running vCPUs so we can't
* analyze it here, flush TLB regardless of the specified address space.
*/
kvm_make_vcpus_request_mask(kvm,
KVM_REQ_TLB_FLUSH | KVM_REQUEST_NO_WAKEUP,
kvm_make_vcpus_request_mask(kvm, KVM_REQ_HV_TLB_FLUSH,
vcpu_mask, &hv_vcpu->tlb_flush);
ret_success: