From nobody Thu Apr 2 19:33:23 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 976A5C6FA82 for ; Wed, 21 Sep 2022 15:27:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231231AbiIUP1G (ORCPT ); Wed, 21 Sep 2022 11:27:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33486 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229624AbiIUP0R (ORCPT ); Wed, 21 Sep 2022 11:26:17 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD7A5901B4 for ; Wed, 21 Sep 2022 08:25:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1663773927; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=p5kD7cCzBwmvmc2H0DQlJ8VpkWFbcoQTaU8KeQ/I8QE=; b=hA51XnyVQF3fXbG7os13zd3J15cndZ2k+xY+2SILmKbWIsiEYroEqEgjp6ypGZ3O5FDf+C SyXmDar4Z5vRQ3Rxe6r/f9BiCxH4ovbfHsV9c+1eRdiqxiNyAk93jljx9g/T1d22bCWDNd 7PuktWyXLgyXTXulskCFwV3uZfwmRkI= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-626-ytXzuVruM8uwKKjuVNcWDg-1; Wed, 21 Sep 2022 11:25:24 -0400 X-MC-Unique: ytXzuVruM8uwKKjuVNcWDg-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 02B3D1C07548; Wed, 21 Sep 2022 15:25:24 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.40.194.159]) by smtp.corp.redhat.com (Postfix) with ESMTP id E80AD2166B36; Wed, 21 Sep 2022 15:25:21 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Michael Kelley , Siddharth Chandrasekaran , Yuan Yao , Maxim Levitsky , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v10 16/39] KVM: x86: hyper-v: Introduce kvm_hv_is_tlb_flush_hcall() Date: Wed, 21 Sep 2022 17:24:13 +0200 Message-Id: <20220921152436.3673454-17-vkuznets@redhat.com> In-Reply-To: <20220921152436.3673454-1-vkuznets@redhat.com> References: <20220921152436.3673454-1-vkuznets@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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: Maxim Levitsky Signed-off-by: Vitaly Kuznetsov --- arch/x86/kvm/hyperv.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h index ca7f1d2c134e..d16f62e4f43a 100644 --- a/arch/x86/kvm/hyperv.h +++ b/arch/x86/kvm/hyperv.h @@ -176,6 +176,24 @@ static inline void kvm_hv_vcpu_empty_flush_tlb(struct = kvm_vcpu *vcpu) =20 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 =3D to_hv_vcpu(vcpu); + u16 code; + + if (!hv_vcpu) + return false; + + code =3D is_64_bit_hypercall(vcpu) ? kvm_rcx_read(vcpu) : + kvm_rax_read(vcpu); + + return (code =3D=3D HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE || + code =3D=3D HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST || + code =3D=3D HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX || + code =3D=3D HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX); +} + void kvm_hv_vcpu_flush_tlb(struct kvm_vcpu *vcpu); =20 =20 --=20 2.37.3