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=-15.4 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FSL_HELO_FAKE, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,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 8A025C07E95 for ; Tue, 13 Jul 2021 20:51:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7145E61006 for ; Tue, 13 Jul 2021 20:51:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235450AbhGMUyk (ORCPT ); Tue, 13 Jul 2021 16:54:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234394AbhGMUyj (ORCPT ); Tue, 13 Jul 2021 16:54:39 -0400 Received: from mail-pg1-x529.google.com (mail-pg1-x529.google.com [IPv6:2607:f8b0:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BF44EC0613E9 for ; Tue, 13 Jul 2021 13:51:47 -0700 (PDT) Received: by mail-pg1-x529.google.com with SMTP id v7so22645093pgl.2 for ; Tue, 13 Jul 2021 13:51:47 -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=obIPDjCBKxSf9eNIBaYimuhTq9MwYLKG2Lkrml2WVkc=; b=l1OFOVbx799HYclC5UOFfxx756UAUM/yU24he0IN8K1LaHcvE2nZeQTDoO6FcrgbHa b8YRJLTifIDRJhe4o9C7g2tSW/ZKGTEuiTNXQWwGrXzaG9uicD2z0jNGchDb/HV4QzXa HcyHiUPxlHFUi/mDI0F6bj8SNACsRrfqCVXddPYA2d83fVmFsVHNaw7kL9n9m3GiJtci 1FnbPhKmdx9Vp6Tj+XCqm2Lm+v9e0ATizOmsJJK0fH0WGJ9S9ivNlaHJypYpNvkrsi3i e98y2DWTz0nZsPjOAelEYHVGpI/PILCLKDtQQ7f9vUcM/eewEhWFpQbRUcSvtdAOxKGU d+8Q== 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=obIPDjCBKxSf9eNIBaYimuhTq9MwYLKG2Lkrml2WVkc=; b=bNb/DvFy+q9c/UHtbzAgKrfqlRB2ghMJF3M/wJ6XlN71ty//+WTN4bzn413F4HCKTV tjLYlFUeWifpnYKbA+yRW1dBGKzn5io13AfuZZPbrFjvKOCGBERTdCLKeEdvsw+oVx5k MzjKAhO+5zd2nt+NUVJ08ydWuclbBwNPdvG809SPVttggcAFTq6/YTomEakOj5kdcY4I 7Lu6oCUT2oUmn2VCBa3GThsL2Jtz0M6GLyDroaw3+6B+HmEYsEobjVtpFesWgFd35+qG zSt1J3oFnX97KPL243/7zS+U8zP7hZqf/XRhdJ5uWVV12MiQwe3ntcDF57QiE9sh4Vmg 8QJw== X-Gm-Message-State: AOAM5328Cb588jOGPpUnDqDMErhUhqa0NZv1IdvQtJ0JI3SlAMoEO1eR 3xZ1k9jVEAwFvCwVBMmmevaZng== X-Google-Smtp-Source: ABdhPJxctmb2j3ozJzCx4wGg8EArySI8Ls9La6ABeaZiakTKEoU0dIpxA+s5VUkbK1/K2sd8nCLGOQ== X-Received: by 2002:a63:ae01:: with SMTP id q1mr5782132pgf.216.1626209507187; Tue, 13 Jul 2021 13:51:47 -0700 (PDT) Received: from google.com (157.214.185.35.bc.googleusercontent.com. [35.185.214.157]) by smtp.gmail.com with ESMTPSA id gd20sm50816pjb.33.2021.07.13.13.51.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Jul 2021 13:51:46 -0700 (PDT) Date: Tue, 13 Jul 2021 20:51:43 +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 38/69] KVM: x86: Add option to force LAPIC expiration wait Message-ID: References: <357378fcb6e3e2becb6d4f00a5c3d2b00b2c566b.1625186503.git.isaku.yamahata@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 > > > > Add an option to skip the IRR check in kvm_wait_lapic_expire(). This > > will be used by TDX to wait if there is an outstanding notification for > > a TD, i.e. a virtual interrupt is being triggered via posted interrupt > > processing. KVM TDX doesn't emulate PI processing, i.e. there will > > never be a bit set in IRR/ISR, so the default behavior for APICv of > > querying the IRR doesn't work as intended. > > > > Signed-off-by: Sean Christopherson > > Signed-off-by: Isaku Yamahata > > Is there a better (existing after the previous patches) flag to test, or > possibly can it use vm_type following the suggestion I gave for patch 28? Not sure if there's a "better" flag, but there's most definitely a flag somewhere that will suffice :-)