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 9A63FC433EF for ; Fri, 24 Jun 2022 12:57:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232011AbiFXM5M (ORCPT ); Fri, 24 Jun 2022 08:57:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230100AbiFXM5L (ORCPT ); Fri, 24 Jun 2022 08:57:11 -0400 Received: from mail-yb1-xb2b.google.com (mail-yb1-xb2b.google.com [IPv6:2607:f8b0:4864:20::b2b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B03F04FC6A for ; Fri, 24 Jun 2022 05:57:10 -0700 (PDT) Received: by mail-yb1-xb2b.google.com with SMTP id p7so2952095ybm.7 for ; Fri, 24 Jun 2022 05:57:10 -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=YiA0YGlHhMKy/ne0Mh3r8zXDFLkjCNSQ537FSF96/24=; b=LndkKm2MAWPB3fwQ4CrnfzqRxS5hZUiKSw6JB316osM2WjtfhNcO0ZXODAXlPjFbbC O3EswrgZMTZBSLV7VYeLgj6r3yzeSPg9Akk6r5WaK21VhfXgfkmGSxmL4Y1Qo8kD59et JYvckztr7r5Fa70QOXq003etN8q3ZjQ3nZ8zwymcfg8SBroqtUiPVPA9DYC24sQeMPVA bvMoLrP2hj8clExquFlniSO5VqvOkkQylsjqZ83FHiZB/K8TLV2GdvYApnF9XKv4Bob+ zzQnLOt90NlCeBqNQVGsXS6GyZQyf/Pc6EnMdIYzXPWXa3CIFB8YBuxoez9sGMIDDWM5 9mUw== 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=YiA0YGlHhMKy/ne0Mh3r8zXDFLkjCNSQ537FSF96/24=; b=0JMKpXxRXMnc1A7BQzKMnhJk6/2I2OKpbZ0XZ+6QucU4W2r/I1sZWUvQKzKaLcyPJL S7RY1EYzrofZ7CpEkTBusT/y6QP4qyqYXBD8ARlG2qSkh/tDNhavB18WUdYsHdMcCBC9 1vgkDNGDhXVvvPIAs6bzoeY2RpHoRMKPZ5sn/6Tg9VgaVjD/SfprRk8Mq666scVp2MR5 T1xDSTdys5069X+m8xBywSbJLRH29Lvv/jj/UhVtJE9vClBQgDYePZFCvhHRdTmTz/Jv fVEvf/dtORdN2ZkjbMqxLwaezG27fpinehiAwnNV/0voO5CwpgTssqN2Ls6e6MLC8SAE ckYQ== X-Gm-Message-State: AJIora/trXiO+rAe1yNLbsNVVL+AHbDS6AQqKOMqpuA3rCdZISfAuwpl 7T1sdYTnXq3+yha3XyiMTLycmLpJXkcv2y4lJX13BA== X-Google-Smtp-Source: AGRyM1vnqCcyIkxaLhGzDujI38DtPZPyGcfvq+svZqcT4XL627aiXs+NBcZn7a4uOp9e+xW0HhccZsu3w16e46Zi9Gg= X-Received: by 2002:a25:7ec2:0:b0:669:b7ad:8806 with SMTP id z185-20020a257ec2000000b00669b7ad8806mr4913319ybc.85.1656075429910; Fri, 24 Jun 2022 05:57:09 -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> In-Reply-To: <20220624133909.00005f6e@Huawei.com> From: Peter Maydell Date: Fri, 24 Jun 2022 13:56:32 +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 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 13:39, Jonathan Cameron wrote: > > On Fri, 24 Jun 2022 11:48:47 +0100 > Peter Maydell wrote: > > > > This seems to be missing code to advertise the new devices in the > > device tree. > > Intentionally. I am not aware of any current interest > in defining DT support CXL or supporting it in operating systems. > Easy enough to add if anyone does the leg work to figure out the > bindings, but that needs to come from someone who cares and > would need to be driven by OS support and a usecase. The ACPI > stuff here is defined as part of the main CXL spec because the > target class of machines simply doesn't generally use DT. I don't really want new devices in the virt board that aren't usable in the common use case of "just pass a kernel with -kernel"... -- PMM