Commit 3c9eb065 authored by Vitaly Kuznetsov's avatar Vitaly Kuznetsov Committed by Paolo Bonzini
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KVM: x86: hyper-v: Introduce kvm_hv_is_tlb_flush_hcall() 



The newly introduced helper checks whether vCPU is performing a
Hyper-V TLB flush hypercall. This is required to filter out L2 TLB
flush hypercalls for processing.

Reviewed-by: default avatarMaxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: default avatarSean Christopherson <seanjc@google.com>
Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <20221101145426.251680-23-vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent b0c9c25e

arch/x86/kvm/hyperv.h

+17 −0
Original line number Diff line number Diff line
@@ -177,6 +177,23 @@ static inline void kvm_hv_vcpu_purge_flush_tlb(struct kvm_vcpu *vcpu) 
	kfifo_reset_out(&tlb_flush_fifo->entries);

}



static inline bool kvm_hv_is_tlb_flush_hcall(struct kvm_vcpu *vcpu)

{

	struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);

	u16 code;



	if (!hv_vcpu)

		return false;



	code = is_64_bit_hypercall(vcpu) ? kvm_rcx_read(vcpu) :

					   kvm_rax_read(vcpu);



	return (code == HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE ||

		code == HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST ||

		code == HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX ||

		code == HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX);

}



int kvm_hv_vcpu_flush_tlb(struct kvm_vcpu *vcpu);



#endif