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=-10.4 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FSL_HELO_FAKE, 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 C10BEC07E95 for ; Tue, 13 Jul 2021 21:03:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ABAA761164 for ; Tue, 13 Jul 2021 21:03:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236285AbhGMVF6 (ORCPT ); Tue, 13 Jul 2021 17:05:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49964 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236230AbhGMVFy (ORCPT ); Tue, 13 Jul 2021 17:05:54 -0400 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B794DC0613F0 for ; Tue, 13 Jul 2021 14:03:03 -0700 (PDT) Received: by mail-pg1-x532.google.com with SMTP id k20so15676400pgg.7 for ; Tue, 13 Jul 2021 14:03:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=/+a0nOAUvmFDk9sQMqBodRLs3dk1rTDWSs7A8bhW4R4=; b=iA0rtUSvo2J+Q0KFs9VeHEfWPCZ8DBG+LqtWDHZyagCTcEzWpYCjPE4wfvRNUVRF7u 9Ki2NkyU53QgVvw8hFtNPqw61MFpsNaDTlck0X1PjcjPQqbYGgFSqk+gC9543wfuqxqP 0Lq7YzT4LxZrqcAOKEMdShDcVjej34X2egWDr8PXR/EdiJ9jJLWjBGn2t8J4HWtp6HEX 4cX1hGyRCCgbQcYp+Iolkk0VjDull+k8vpcQ+zrZIUtDhLmDBnom3Y7BG3xV+NYW/tsD 7ty0z8TzhI2oSJgLoNEoCJYA76zZyptM0gzanVZu3sUAA94xvw653dRzaS/ggc6v9EAC k9Rw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=/+a0nOAUvmFDk9sQMqBodRLs3dk1rTDWSs7A8bhW4R4=; b=hWX03U+yYiFCc/b9wyLdIuYJV80M1gabor3vJaz7wjKLjVPoyHuF6xli7cA/y07URq j0Aane3YSUALuGRCz3MouerGUuzleqDpB0AhYRJf3TcrK4eUYR79PmfDe8WusrW3/DlD HHkWQpsqKedZH90WHxuuKw+5n4Jz7VNZ1W479yq6oGWlCfliaPc8dwJq4l9l7gx3JWa7 70Z//Vyc9ICVJMHNtNm8Bt0K1yF6s5ORrdEEOPTE4N/pvdlFRJ2iDsvKIMq75ig7weeQ By/RPWgFxRCAeyztGlS624UTufsAqHYKL4UGW7sK/8JrDn1kjYjwr7saE/weDy8YTfIF L1kg== X-Gm-Message-State: AOAM53318tCcz2d3qMBNo9jEEZNWKwE9zBOapCAZufQcZtnpzN8HMetn P7s1E1KkzH/8V4MeLIgOCJZB6w== X-Google-Smtp-Source: ABdhPJww8g05J8+aQcowzYH6Gd3XLQf/mwD1z0IQ5Ql/naKK2SPiOd1YyZMnANZGrw2dUw7d8cZfFA== X-Received: by 2002:a65:4109:: with SMTP id w9mr5888848pgp.24.1626210183074; Tue, 13 Jul 2021 14:03:03 -0700 (PDT) Received: from google.com (157.214.185.35.bc.googleusercontent.com. [35.185.214.157]) by smtp.gmail.com with ESMTPSA id a20sm3604319pjh.46.2021.07.13.14.03.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Jul 2021 14:03:02 -0700 (PDT) Date: Tue, 13 Jul 2021 21:02:58 +0000 From: Sean Christopherson To: Paolo Bonzini Cc: isaku.yamahata@intel.com, Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , erdemaktas@google.com, Connor Kuehl , x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, isaku.yamahata@gmail.com, Sean Christopherson Subject: Re: [RFC PATCH v2 51/69] KVM: x86/mmu: Allow per-VM override of the TDP max page level Message-ID: References: <89d1ff17-dc48-0f39-257a-4cf11a98f435@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <89d1ff17-dc48-0f39-257a-4cf11a98f435@redhat.com> Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Tue, Jul 06, 2021, Paolo Bonzini wrote: > On 03/07/21 00:04, isaku.yamahata@intel.com wrote: > > From: Sean Christopherson > > > > TODO: This is tentative patch. Support large page and delete this patch. > > > > Allow TDX to effectively disable large pages, as SEPT will initially > > support only 4k pages. ... > Seems good enough for now. Looks like SNP needs a dynamic check, i.e. a kvm_x86_ops hook, to handle an edge case in the RMP. That's probably the better route given that this is a short-term hack (hopefully :-D).