From mboxrd@z Thu Jan 1 00:00:00 1970 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 AB4B4C433F5 for ; Fri, 27 May 2022 16:00:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354092AbiE0QAU (ORCPT ); Fri, 27 May 2022 12:00:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353874AbiE0P4q (ORCPT ); Fri, 27 May 2022 11:56:46 -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 2731752B27 for ; Fri, 27 May 2022 08:56:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1653666997; 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=pDMtuQHCKDck2X6AJwzMNfVZUyOuSlNQEZTxeqxbFoc=; b=YrpkxP9JX2lhWNrJXqkNqJeiJ7D3JwDGewa+GGLv9wYvYxJhxSUx/F7IXFep8lm2qBaOLY LjQW0F5RV/Dpzmn72I1cqyB7UzuLzF4UkvUH6KKJlACpQC64JMmTkQSiaPyWEuWBRC0oSg H7z+RY6GjBpw2M9JoEYc5RMwREnuWtA= 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-563-P_j2Fu7DOS2Z-kgHsQ47NQ-1; Fri, 27 May 2022 11:56:34 -0400 X-MC-Unique: P_j2Fu7DOS2Z-kgHsQ47NQ-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 663BB8339D6; Fri, 27 May 2022 15:56:33 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.40.192.126]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2EC812166B26; Fri, 27 May 2022 15:56:31 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini Cc: Sean Christopherson , Maxim Levitsky , Wanpeng Li , Jim Mattson , Michael Kelley , Siddharth Chandrasekaran , Yuan Yao , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 16/37] KVM: x86: hyper-v: Introduce kvm_hv_is_tlb_flush_hcall() Date: Fri, 27 May 2022 17:55:25 +0200 Message-Id: <20220527155546.1528910-17-vkuznets@redhat.com> In-Reply-To: <20220527155546.1528910-1-vkuznets@redhat.com> References: <20220527155546.1528910-1-vkuznets@redhat.com> MIME-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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. 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 207d24efdc5a..dc46c5ed5d18 100644 --- a/arch/x86/kvm/hyperv.h +++ b/arch/x86/kvm/hyperv.h @@ -171,6 +171,24 @@ static inline void kvm_hv_vcpu_empty_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); +} + void kvm_hv_vcpu_flush_tlb(struct kvm_vcpu *vcpu); -- 2.35.3