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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 329E9C433EF for ; Fri, 24 Jun 2022 15:02:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231968AbiFXPCX (ORCPT ); Fri, 24 Jun 2022 11:02:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45276 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231530AbiFXPCW (ORCPT ); Fri, 24 Jun 2022 11:02:22 -0400 Received: from mail-yb1-xb30.google.com (mail-yb1-xb30.google.com [IPv6:2607:f8b0:4864:20::b30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D4C6A6547 for ; Fri, 24 Jun 2022 08:02:21 -0700 (PDT) Received: by mail-yb1-xb30.google.com with SMTP id o79so4969124ybc.4 for ; Fri, 24 Jun 2022 08:02:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=EnYWT6+eru3uHPWApb4vpG/T5apsG8TSW4cZmehz1lw=; b=zq7QZtDLmFXHZztoUKje/w4bFHHUIrWSc+EfGMYwAsFnl94+nuNoEQtNLEwY9Utw2w XXlgeWTqV4VMtIEmbW2CQR22pTCLVggk1Cv4M2swje8tO3XyslNXhF9lkSfls1aH91vE lUldpVSJyfvzAPqlakH7K6aa3dkNP4Y3Z5OfRaloT4Rf2Z/fAT4EuXhgzD8drzW8jIui dS+whmMIYPOloBJV86hpTHDS0Vj/ImCxuJGnN+5JSw7HIJ6QxhIwj6ZM2FozegAZVkoj 1Ej1zI2qRvyaz/uh/2rMK9RGC3pgcofibN/k/HtkE8jg+mQR5hwjTDPgGLiSK1yVRAY2 Narg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=EnYWT6+eru3uHPWApb4vpG/T5apsG8TSW4cZmehz1lw=; b=Km/fJ+VX2QldWtQUr9/n70DV4yeaJ7LVHe4LCM41FOHzcGFlDhCS5ztwOf1dv0ZCct RaFl/M/gIkxkYruUJFMTAilpVg4cgZcF+EQS0V2wfWPXXXm0vRui52/tUZecWMCpuzoK byad/1g+98Ie0J27/6OFLTdFrq5+Y0I3rw2Af/xGYF7YTWYCaDvTRlOLUN9Y4hEXc0H7 xCm+xWDcLxyjrdq6DdHAgsEFZDdugfQQ8j1FY0FyAKMlYU6QOcRXZVXyC5QLnunxUc/e Pbkzrb7A2Vm3XWsLP0qrbew/ar0rZkI2yAa02Ef7J7UryeS3itdnyTT9/Ky8f3gTS6cY D6gA== X-Gm-Message-State: AJIora/Lx2chpSmrFoWv0xevpDOPOuz5GxNra+/wQQfcg5K/SGxC3cgk 3oYO92RdevRa5KnxrBF8LxHxpnRXvD7W13LDPvgbVw== X-Google-Smtp-Source: AGRyM1uMXPWDr04izJp2BwkDssX+25tzbf0qMTakadA3kQlppmVhNAe/FMBviiZzY01JVp7a7VLvfBEFR7iSRsB3KFE= X-Received: by 2002:a25:d655:0:b0:66c:84b7:df40 with SMTP id n82-20020a25d655000000b0066c84b7df40mr19510ybg.193.1656082940786; Fri, 24 Jun 2022 08:02:20 -0700 (PDT) MIME-Version: 1.0 References: <20220616141950.23374-1-Jonathan.Cameron@huawei.com> <20220616141950.23374-2-Jonathan.Cameron@huawei.com> <20220624133909.00005f6e@Huawei.com> <20220624150844.000005ec@Huawei.com> <20220624155436.000047cb@Huawei.com> In-Reply-To: <20220624155436.000047cb@Huawei.com> From: Peter Maydell Date: Fri, 24 Jun 2022 16:01:42 +0100 Message-ID: Subject: Re: [PATCH v11 1/2] hw/arm/virt: Basic CXL enablement on pci_expander_bridge instances pxb-cxl To: Jonathan Cameron Cc: qemu-devel@nongnu.org, alex.bennee@linaro.org, qemu-arm@nongnu.org, "Michael S . Tsirkin" , Ben Widawsky , Paolo Bonzini , linux-cxl@vger.kernel.org, linuxarm@huawei.com, Marcel Apfelbaum , Igor Mammedov , Markus Armbruster , Mark Cave-Ayland , Adam Manzanares , Tong Zhang , Shameerali Kolothum Thodi , Dan Williams Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org On Fri, 24 Jun 2022 at 15:54, Jonathan Cameron wrote: > Just occurred to me there is another barrier to an approach that adds > DT bindings. > I fairly sure hw/pci-bridge/pci_expander_bridge.c (PXB) > only works on ACPI platforms and is the only host bridge supported > for CXL emulation in QEMU. Isn't it probeable like any other PCI device/bridge ? -- PMM