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 7420BC76188 for ; Tue, 4 Apr 2023 00:08:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229945AbjDDAIZ (ORCPT ); Mon, 3 Apr 2023 20:08:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38368 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229446AbjDDAIY (ORCPT ); Mon, 3 Apr 2023 20:08:24 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42C6C3ABC for ; Mon, 3 Apr 2023 17:08:23 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id f66-20020a255145000000b00b714602d43fso30727950ybb.10 for ; Mon, 03 Apr 2023 17:08:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; t=1680566902; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=W5K/I8dh64Blb5yqarPknay3Q+5JbSm0DRYBSIy4qmQ=; b=BRo3YUkjsSLi3rfzm+/Te0GMQ4KxInH3c6ldmeTiSqtQsQuXqYpsFOpn91YhgsGgS6 xYdEgFIxZMrFW9OjogK5qiOZ3hsMHDLVbCv4LzYX/PKnG78Ouvai4zDDF2eWO0WBFF9o Qmk3s9ypQVlmOA0N4I189AbMQx2+pUwarwkBlp+znnsf5+lDo5siRC/nhSwUc8xE3d+E 7ubG9yNsYuXmSUJDirfxOVAkX+tj1U3DV8gIF+LSJxJzyHVopQUzPg+KiwOUP8iaO39q qXA5lS8xFXNLIdNu0hIWnjvE3mm0Sx0NEU9BWZVp7OYA5eLB7VWLN1LVn90iRaGIexaq u89Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680566902; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=W5K/I8dh64Blb5yqarPknay3Q+5JbSm0DRYBSIy4qmQ=; b=HIbQILma4aojsCl/lfHSowCKt3SZrK/FrBHTZLVZ4XbjfNKFfoHKkHNp8gj7H8cAB8 6LsdYxQH55tNUUxxthh/9+pny3JcSorjhd7cibX1PkWJn72DQy/jO703XamHmRrmj78r FvPvzVLbdvbLuQ5ZPNnb1iXNvsHKbktLVMGCHT+43Su1gkfAoYx4Ss8rGZpMmCF6xbMV UYMW/ZY7aM+MRgZ+vv+Op+mvWW7D9VtGPPf+rq0qWFFrhIyjn9F0emknoOYpYidPpliX e6u9IXl/KeKo8V0r0wtDn9SMzYD31X89JOaGP+FdBf++oFmQm4IHejKWxvbRIaIuK19A 1oXg== X-Gm-Message-State: AAQBX9clppvDcGUZXGZlHV0VZR96nD5QeQ5TYNmmTFUrf1MkEPRJ1qtX n1sTLLe9S0oQxo9oRe+rM1PN/4PlAmc= X-Google-Smtp-Source: AKy350b2CwvV7fFpDxDXW+FxLVsRQYRW5ja4kS6Qhb26U9DTSmx2rF2jIn8p3t4FENLx99Tfoobb2/QLAMI= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a05:690c:70e:b0:545:1d7f:acbf with SMTP id bs14-20020a05690c070e00b005451d7facbfmr379315ywb.10.1680566902497; Mon, 03 Apr 2023 17:08:22 -0700 (PDT) Date: Mon, 3 Apr 2023 17:08:21 -0700 In-Reply-To: <4f77d3a6-ed17-051e-5aa3-17fc3ab6dc7f@grsecurity.net> Mime-Version: 1.0 References: <20230403105618.41118-1-minipli@grsecurity.net> <20230403105618.41118-4-minipli@grsecurity.net> <4f77d3a6-ed17-051e-5aa3-17fc3ab6dc7f@grsecurity.net> Message-ID: Subject: Re: [kvm-unit-tests PATCH v3 3/4] x86/access: Forced emulation support From: Sean Christopherson To: Mathias Krause Cc: kvm@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Mon, Apr 03, 2023, Mathias Krause wrote: > On 03.04.23 21:06, Sean Christopherson wrote: > > Keeping KVM-Unit-Tests and KVM synchronized on the correct FEP value would be a > > pain, but disconnects between KVM and KUT are nothing new. > > Nah, that would be an ABI break, IMO a no-go. What I was suggesting was > pretty much the patch: change selective users in KUT to make them > objdump-friendly. The FEP as-is is ABI, IMO I would be amazed if anything other that KVM's own tests utilizes the feature. IMO, it really shouldn't be considered ABI. Paolo?