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=-14.6 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 232F3C433DF for ; Mon, 10 Aug 2020 23:17:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ECA41206C3 for ; Mon, 10 Aug 2020 23:17:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="G2WMPWEn" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727014AbgHJXRT (ORCPT ); Mon, 10 Aug 2020 19:17:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51910 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726634AbgHJXRT (ORCPT ); Mon, 10 Aug 2020 19:17:19 -0400 Received: from mail-oo1-xc43.google.com (mail-oo1-xc43.google.com [IPv6:2607:f8b0:4864:20::c43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DA418C06174A for ; Mon, 10 Aug 2020 16:17:18 -0700 (PDT) Received: by mail-oo1-xc43.google.com with SMTP id j19so2255052oor.2 for ; Mon, 10 Aug 2020 16:17:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=oDXx5xJz1b+wcw5C/YeihMWCNkvCnSl6ZWGflH/Camk=; b=G2WMPWEnEgkIw8rUO76xQAEFBkE1B8TahPRJXZpA0yt9brxalzEaXGQ0isAPxwO9iL Ema06xXbSyN/MsFCpcnyGBHNYrNTGO1SboHfjBYbaONgXoSEEwOY/SgM9HYLrh4HY2E1 8jsIMI1TPmSvy9HKsJ943JNmid7GT/yJzmPFS2P1+eHAumMNv/8wkuFlnpm29MFVDWwg 0BoGzPjEhxhaXjom8490dHZSWwUed5trgNt+x3AnoG2BhoTl1sLhBBNYTP8LqSQ3AnDT j9kkK8Maa1QKY4Yq7H6nYdZNSxzNHWzlff3jrlK4Td/TXQ9hWuCg9t/RJjw95nZD4EAY 8EQQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=oDXx5xJz1b+wcw5C/YeihMWCNkvCnSl6ZWGflH/Camk=; b=j9o0ZSYHnYrdIdrPt7Cs6jGGBJJVXqeNwuS629hHhi+VRANNIMAbysOSeTWZiVG+Bz FIwxEAemKMvkQHf4HBDB+9p8HBIO6GaNnnPASqVySnjAEQPUVw8QJV6753LphmTSkAyH rtaXaDDQyK0TizX83hFY6YWdjYlFod0xjdWw5n6ikYjQ+DvUR94XLCGKW61CvFRj0zyk Cw/wnzkytysLQKWhZoaD4HSMxj2LYv/nKYjKHafVK0jm8tkzclr9XCXnfj0EDBtHQhUO F68L+YrjpFZssoayikNpkcxvOGnAbeRfKqZw5lX9h/AHhMt+EmGATNsX23YrvTTBNkQZ hLlA== X-Gm-Message-State: AOAM532gJ8qTXxio3oL/njyN8dEPdoIsvFSHl1DGKBZBiVEAcHtbUthG rUA3cpq3xCUXqxBZbNKOuHUX3IgAkyLHcZH/nU9Xqg== X-Google-Smtp-Source: ABdhPJzvzcF7MszhID1v28AVOZi5aWdqtP6b/SmecyE0nDYFxNGBZOHaye1qL2jOOIvYdQSFoNObyXBOJTJ89w+wQyE= X-Received: by 2002:a4a:3015:: with SMTP id q21mr2815185oof.55.1597101437923; Mon, 10 Aug 2020 16:17:17 -0700 (PDT) MIME-Version: 1.0 References: <20200807084841.7112-1-chenyi.qiang@intel.com> <20200807084841.7112-2-chenyi.qiang@intel.com> In-Reply-To: <20200807084841.7112-2-chenyi.qiang@intel.com> From: Jim Mattson Date: Mon, 10 Aug 2020 16:17:06 -0700 Message-ID: Subject: Re: [RFC 1/7] KVM: VMX: Introduce PKS VMCS fields To: Chenyi Qiang Cc: Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Joerg Roedel , Xiaoyao Li , kvm list , LKML Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 7, 2020 at 1:46 AM Chenyi Qiang wrote: > > PKS(Protection Keys for Supervisor Pages) is a feature that extends the > Protection Key architecture to support thread-specific permission > restrictions on supervisor pages. > > A new PKS MSR(PKRS) is defined in kernel to support PKS, which holds a > set of permissions associated with each protection domian. > > Two VMCS fields {HOST,GUEST}_IA32_PKRS are introduced in > {host,guest}-state area to store the value of PKRS. > > Every VM exit saves PKRS into guest-state area. > If VM_EXIT_LOAD_IA32_PKRS = 1, VM exit loads PKRS from the host-state > area. > If VM_ENTRY_LOAD_IA32_PKRS = 1, VM entry loads PKRS from the guest-state > area. > > Signed-off-by: Chenyi Qiang Reviewed-by: Jim Mattson