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=-18.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_IN_DEF_DKIM_WL autolearn=ham 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 C7F69C433DB for ; Wed, 20 Jan 2021 20:08:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 87541233FC for ; Wed, 20 Jan 2021 20:08:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392836AbhATUIT (ORCPT ); Wed, 20 Jan 2021 15:08:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41080 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2392798AbhATUHQ (ORCPT ); Wed, 20 Jan 2021 15:07:16 -0500 Received: from mail-pg1-x534.google.com (mail-pg1-x534.google.com [IPv6:2607:f8b0:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 84C1BC061757 for ; Wed, 20 Jan 2021 12:06:35 -0800 (PST) Received: by mail-pg1-x534.google.com with SMTP id c132so15970384pga.3 for ; Wed, 20 Jan 2021 12:06:35 -0800 (PST) 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=lQbchGQKY82wl+o4TbL309jkEN0qre7XquQdqrcnNpI=; b=t2WzXAXK+d5diH6v6Tf6zXB6OePNdD9FnHGfiUxFtMgNyA6M4Xrmx+jkO3oroMeOhN yYQLs3MNmjIW2lWg6oaiZPSa1t6wWiZpok8Vf7PmlIb1CEd4iBRUO2b2PM3fPpwGDc/g xa6HXupPoG6OK6eMkLW4z3JC+Cr3OCvFYx7BXghViIrlipr/aEaHswAx3fsnXwYsKgB4 l2WKPFR849OaILDuv2bkKdyFiibD9XR60vbS2ta/v4waXomAZLk97QXiOAJZw+T7KoQc Pcx0KLGcrReVSeu/N632kpcbhnM6ND/aHIOsnx0SlgbVQ1iFh1tm9LMa2Pc/zBF19nEa SP4A== 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=lQbchGQKY82wl+o4TbL309jkEN0qre7XquQdqrcnNpI=; b=HeI5oxKSFV16uSSC0MxsFvqkc9NBySFbKMxhVdq8jijBoU0AOcslDtjtQBSeqqSz2s CFe4bBb7mswm3rx3rNaNrxPAiWAmvSaz8/Vfvx79CLXOjucylaon5jHnT26SlBb4Ln7Y +01SKfGxtnp4ibHd37+leVvg9B4OfrBa+xT171Q98HGmLehvcdN7JT69b7Qhhlw/y5A/ 8opahyuPRMY3TRjAqG70Ljwu0P5GJXDQum94oQSDggqQmrNBGcynqjRhto+/W/uc3T1l oNeDUqUdQPw0jOriPpoHaNLNkC5REDH7/gN/gtF2pcqWTV/Iz7K82ec/Uk4ciSE2i/pr AkPA== X-Gm-Message-State: AOAM530OinAh1fsu7SWyodRQt9jrgNgIQhsxOr/Aicpx3EJcdwxb/8Ke GXsyIHddfn9+d8q0rdwX68k2uw== X-Google-Smtp-Source: ABdhPJzLZhyZH91lMH6g/S9TFPhw2SKyEeH5hRTVqmU/4tOHhIuZEFfwCGZWC/wQ0RURsY4LFROCOw== X-Received: by 2002:a63:520e:: with SMTP id g14mr10767120pgb.378.1611173194845; Wed, 20 Jan 2021 12:06:34 -0800 (PST) Received: from google.com ([2620:15c:f:10:1ea0:b8ff:fe73:50f5]) by smtp.gmail.com with ESMTPSA id b1sm3150314pjh.54.2021.01.20.12.06.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Jan 2021 12:06:34 -0800 (PST) Date: Wed, 20 Jan 2021 12:06:27 -0800 From: Sean Christopherson To: Ben Gardon Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Paolo Bonzini , Peter Xu , Peter Shier , Peter Feiner , Junaid Shahid , Jim Mattson , Yulei Zhang , Wanpeng Li , Vitaly Kuznetsov , Xiao Guangrong Subject: Re: [PATCH 09/24] kvm: x86/mmu: Don't redundantly clear TDP MMU pt memory Message-ID: References: <20210112181041.356734-1-bgardon@google.com> <20210112181041.356734-10-bgardon@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210112181041.356734-10-bgardon@google.com> Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Tue, Jan 12, 2021, Ben Gardon wrote: > The KVM MMU caches already guarantee that shadow page table memory will > be zeroed, so there is no reason to re-zero the page in the TDP MMU page > fault handler. > > No functional change intended. > > Reviewed-by: Peter Feiner > > Signed-off-by: Ben Gardon Reviewed-by: Sean Christopherson