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 X-Spam-Level: X-Spam-Status: No, score=-8.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8FCE6C433E0 for ; Tue, 2 Jun 2020 00:11:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 570C5207BB for ; Tue, 2 Jun 2020 00:11:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="u4JfX/EW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726012AbgFBALN (ORCPT ); Mon, 1 Jun 2020 20:11:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39092 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725446AbgFBALN (ORCPT ); Mon, 1 Jun 2020 20:11:13 -0400 Received: from mail-io1-xd36.google.com (mail-io1-xd36.google.com [IPv6:2607:f8b0:4864:20::d36]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0BDBDC061A0E for ; Mon, 1 Jun 2020 17:11:13 -0700 (PDT) Received: by mail-io1-xd36.google.com with SMTP id s18so8976578ioe.2 for ; Mon, 01 Jun 2020 17:11:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:from:date:message-id:subject:to:cc; bh=v9uzAaC7HJVWcGRrRi0P7AwP4KcGcm5IFgUEhCiaK14=; b=u4JfX/EW12ozz3qwlI6g/3Ql7d0Iu7RYNXDsO3EfOC/+b1sdxJq10jNkKF/EXhfz7x lNxvt8olkFwkP03Oh7Q59lCbEEENFgz2Jy5HrKhpiuUfn+9YzR/84x5ZTX4LTTSdXjM3 UEqdRWKRYVFbGVd3yUJeHCbOjc63t8T9wkqlXjn5PT7RDf8VCrI1sRQEJaPzsMjbkGMm P0AmvcgUoeIGyaClc3eBYOF0bXdLBBaYdcAG6Xgc1Tm0FcZl4i3NvLRAzI0wdsvUtn9b rCoI3GjCQiwpBl0t0pK8SdOwGDMJS+84/rIIXwYuzIhD9PqUz0fYFhBJamPCEY3dEp8z kLpw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=v9uzAaC7HJVWcGRrRi0P7AwP4KcGcm5IFgUEhCiaK14=; b=ep9L1XUUKYUdh13ncxrfQJfsrsFIr9tdbqRdo/OOFTT5Vd/p7DCzcnqLtUGjsa8zxK 3pUAoJIygaU036zyrSi7+W6rtLsczc4+9L6CSBGJrEo4ZtUg3p8yz3o/okVx2SjJkSjv /IeKgkKkB7zdcOFj0LjahJGE0+vkGLgzenIgSoVTr/qqcY0z6AGIvY0sxEJeK77HE4Ji cFIkfOgnU6VPYjjvnIH3E1alX3oAkFH4dGPuQvDgkRxgbz2hO/UmG874QNpeNk6jFzhu XojBFwQiO2OwBu5BAFJSGCBsYqzF1+ZZN263MuCCIZSVpHz9XWMEIYZ6PNnTolPAJ6Y9 OZ1Q== X-Gm-Message-State: AOAM533TbRFyPJZcZyJaihhiFG6CZIkZniyNpud+pW7x+zQPmr0+xapk pI4pV0/UC1/X1v3LgptATM3Rnakty8narG9O5vu5efi6EIc= X-Google-Smtp-Source: ABdhPJwKTUc2kDCCH+JQQadb9P65RUZtXQ75iMcc6Lj2BYxwIi3DxCi57Tn/DkJeZnP0FiWp7L8QPZ2T5VZDn8NmPvY= X-Received: by 2002:a5e:a705:: with SMTP id b5mr21174653iod.12.1591056671376; Mon, 01 Jun 2020 17:11:11 -0700 (PDT) MIME-Version: 1.0 From: Jim Mattson Date: Mon, 1 Jun 2020 17:11:00 -0700 Message-ID: Subject: PAE mode save/restore broken To: kvm list , Paolo Bonzini Cc: Sean Christopherson Content-Type: text/plain; charset="UTF-8" Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org I can only assume that no one cares that KVM_GET_SREGS/KVM_SET_SREGS is broken for PAE mode guests (i.e. KVM_GET_SREGS doesn't capture the PDPTRs and KVM_SET_SREGS re-reads them from memory). Presumably, since AMD's nested paging is broken for PAE mode guests, the kvm community has made the decision not to get things right for Intel either. Can anyone confirm? This was all before my time.