Received: by 2002:a25:6193:0:0:0:0:0 with SMTP id v141csp4250137ybb; Mon, 23 Mar 2020 16:58:15 -0700 (PDT) X-Google-Smtp-Source: ADFU+vslSaCEdmJDS5GcIzLPaYIU4EWB40qANTE9ZKPno53pCtJUrkfifXFTCnicj1ozb7TJo/+1 X-Received: by 2002:aca:c488:: with SMTP id u130mr1504156oif.154.1585007895392; Mon, 23 Mar 2020 16:58:15 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1585007895; cv=none; d=google.com; s=arc-20160816; b=SCh634FXaiGq82sLbZdSnPyG1DAxGCd2t0O/7awUCjC5f7UfmdIwr6tj3Z8EZN0sIb AWtYPNVW9fI+3AtMS6vhAqhAXb4TwQnvbEBFPlQbf+jsYhiB8OXf6WJMDHX+Q6/913ja MPabrHHI4MMVPMy3v9Zf5YQYsS/FraeBHzyS93w5vHvjQYaQz42YGR/vBroDWOU6Tkub qtBdvs/8u0hA0qHTSbd/7zvrmSUAiBSacO9pELe/tzj2PHPpga4i646JsryKyJfqR8nk Mu/HYDiqtGNFR7qnb/3QTg0rAVw1snbr9TAO5UXqRVGQ6+fL3whD3Sdqi5HcWpLLpRbq XWrA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:from:references:cc:to:subject:dkim-signature; bh=qLT9PP21JpSVg8g9Ca0QcaUFbJS8dx+sxPNM6+3EIvA=; b=opgTbOjFkdH9z1+Pk+FkksMcEibZHudzTNJf93stZgbfENGIYAKACEd1rvOlbUnagM 1g2A8HJFTedGaRVWvHmUPG5kgj8ulIPKjvjQCtecxfX6cNDjXdCesNdym+A7rJs4ZtZQ WAiPaeoqKFvjxk0j1KO9HQKnTH93wZnGHUIy5Kx5rPvYn/Vb6Cy3Nqvw7Cp9gh05zEDI cVGT897FcOl7OeLrFRBBvj5NYiouCOZscHHZsbcTIctXnhJW3VXodmWUx+qHetGsOH7h KCsvxJiFSbVlz2kumvDbcPUEx0qQ+l/amzYpSgegpPGJJozV9IzMwFV3CBJ5GPPZfjgq bbxw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=gGzNq++v; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id c13si8034607oig.220.2020.03.23.16.58.02; Mon, 23 Mar 2020 16:58:15 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=gGzNq++v; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727298AbgCWX4m (ORCPT + 99 others); Mon, 23 Mar 2020 19:56:42 -0400 Received: from us-smtp-delivery-74.mimecast.com ([216.205.24.74]:24383 "EHLO us-smtp-delivery-74.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727054AbgCWX4l (ORCPT ); Mon, 23 Mar 2020 19:56:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1585007800; 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=qLT9PP21JpSVg8g9Ca0QcaUFbJS8dx+sxPNM6+3EIvA=; b=gGzNq++vTNY3KAGTyR6qFdmtDRlpZJumYkLhxGhhIy4yKrYWxCTIr3aqt7DRQNbvXkPhXR UZEfKKGBh3NK1QZJat+ya7waOZDnW54tkT7HRB19+3Cn1n0ZsVPKCmG3e/wdxzbT4vOZT3 VrdTxSJohOLmBuad8/uXybsKePa7or8= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-87-NFSOpbt_PoS-QNZVSZLocQ-1; Mon, 23 Mar 2020 19:56:36 -0400 X-MC-Unique: NFSOpbt_PoS-QNZVSZLocQ-1 Received: by mail-wm1-f69.google.com with SMTP id w12so643991wmc.3 for ; Mon, 23 Mar 2020 16:56:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=qLT9PP21JpSVg8g9Ca0QcaUFbJS8dx+sxPNM6+3EIvA=; b=N4o1TtZ1QMzCotjfWARzd6Sfr7NHyYFPqAPGnhQyyewRhgkxfTNtMxRrru32vJAMCl zojxfliSlTsto1BoBJT+xmP5NHI74HEh6NO5Sc8dzDudjpGMdvRmUszO/RpCje4pYqTZ VMeFnSoK0nx/XJ8LYRZqa7RpSP57uhS45bQ2hTuN2Osev3J8OEsIq/xFGjfh+55WaMos IqsTHevK0AI75uOSHttHIXByKvEM5Uif5YFJwiHv5vYpZc3b3hpf9+re0F4NPrcnLqc0 sRxFK4MYpj19ut+owcBjAeEXgVZJgZcpF8mbzpvQp1XC+xIoAnoZXuSShkiOUmghwejE 0FzA== X-Gm-Message-State: ANhLgQ39AlN+8VQz4TaxBEe7OpM36jCY68xe3M6oOaxoLUpLF3TqxWXg DjMjm4IQfAWzjve5IqrWwInCPLFG+cczTcG9ONWxL4vBrf7bsfFZM65ldHlSWBwf447l1jrDLw/ hJoasSffF2VkPi5hlLB2wJS5O X-Received: by 2002:adf:a54a:: with SMTP id j10mr33957036wrb.188.1585007795333; Mon, 23 Mar 2020 16:56:35 -0700 (PDT) X-Received: by 2002:adf:a54a:: with SMTP id j10mr33957012wrb.188.1585007795099; Mon, 23 Mar 2020 16:56:35 -0700 (PDT) Received: from ?IPv6:2001:b07:6468:f312:7848:99b4:482a:e888? ([2001:b07:6468:f312:7848:99b4:482a:e888]) by smtp.gmail.com with ESMTPSA id t16sm23019727wra.17.2020.03.23.16.56.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 23 Mar 2020 16:56:34 -0700 (PDT) Subject: Re: [PATCH v3 05/37] KVM: x86: Export kvm_propagate_fault() (as kvm_inject_emulated_page_fault) To: Sean Christopherson , Vitaly Kuznetsov Cc: Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Ben Gardon , Junaid Shahid , Liran Alon , Boris Ostrovsky , John Haxby , Miaohe Lin , Tom Lendacky References: <20200320212833.3507-1-sean.j.christopherson@intel.com> <20200320212833.3507-6-sean.j.christopherson@intel.com> <87sghz844a.fsf@vitty.brq.redhat.com> <20200323162433.GM28711@linux.intel.com> From: Paolo Bonzini Message-ID: <7012fd88-5590-e50d-cee2-d14fb54ce742@redhat.com> Date: Tue, 24 Mar 2020 00:56:32 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200323162433.GM28711@linux.intel.com> Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 23/03/20 17:24, Sean Christopherson wrote: >> We don't seem to use the return value a lot, actually, >> inject_emulated_exception() seems to be the only one, the rest just call >> it without checking the return value. Judging by the new name, I'd guess >> that the function returns whether it was able to inject the exception or >> not but this doesn't seem to be the case. My suggestion would then be to >> make it return 'void' and return 'fault->nested_page_fault' separately >> in inject_emulated_exception(). > Oooh, I like that idea. The return from the common helper also confuses me > every time I look at it. > Separate patch, please. I'm not sure it makes a great difference though. Paolo