From patchwork Thu Apr 14 13:19:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 12813558 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 97EBFC433EF for ; Thu, 14 Apr 2022 13:34:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244861AbiDNNgV (ORCPT ); Thu, 14 Apr 2022 09:36:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48280 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244872AbiDNN2N (ORCPT ); Thu, 14 Apr 2022 09:28:13 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 88530A76CF for ; Thu, 14 Apr 2022 06:21:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649942468; 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=nLH13vK6YhUccliR3apzUYTKpkvsAYqQrKUY2KtRR1w=; b=WDFMeBU4oj2K9xgUVE/VLyRiHgDvrAXK2GFbnQwVMPiR+wvsp0X+rM5z8RmcPYiApjri/8 ZJ0uKvrCchj/rlJ7lgBrjC9FBOGqb/rhA1MkcMbrxKt6N5kxI8/iXpnMHELtSHqqGiLxkp W3dhdhZwTATPwBh0OLpeRV5p1HK4OWE= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-361-PmzDrDJxMRSsRhyIRBh42A-1; Thu, 14 Apr 2022 09:21:05 -0400 X-MC-Unique: PmzDrDJxMRSsRhyIRBh42A-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 4E3C9894EF4; Thu, 14 Apr 2022 13:20:47 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.40.195.11]) by smtp.corp.redhat.com (Postfix) with ESMTP id 751D27C28; Thu, 14 Apr 2022 13:20:45 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Michael Kelley , Siddharth Chandrasekaran , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 15/34] KVM: x86: hyper-v: Introduce kvm_hv_is_tlb_flush_hcall() Date: Thu, 14 Apr 2022 15:19:54 +0200 Message-Id: <20220414132013.1588929-16-vkuznets@redhat.com> In-Reply-To: <20220414132013.1588929-1-vkuznets@redhat.com> References: <20220414132013.1588929-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org 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. Signed-off-by: Vitaly Kuznetsov Reviewed-by: Maxim Levitsky --- 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 d59f96700104..ca67c18cef2c 100644 --- a/arch/x86/kvm/hyperv.h +++ b/arch/x86/kvm/hyperv.h @@ -170,6 +170,24 @@ static inline void kvm_hv_vcpu_empty_flush_tlb(struct kvm_vcpu *vcpu) tlb_flush_ring = kvm_hv_get_tlb_flush_ring(vcpu); tlb_flush_ring->read_idx = tlb_flush_ring->write_idx; } + +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); +} + void kvm_hv_vcpu_flush_tlb(struct kvm_vcpu *vcpu);