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[209.85.220.41]) by mx.google.com with SMTPS id w13-20020a25b88d000000b00669a2f43a20sor1055649ybj.102.2022.06.24.05.57.10 for (Google Transport Security); Fri, 24 Jun 2022 05:57:10 -0700 (PDT) Received-SPF: pass (google.com: domain of peter.maydell@linaro.org designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=LndkKm2M; spf=pass (google.com: domain of peter.maydell@linaro.org designates 209.85.220.41 as permitted sender) smtp.mailfrom=peter.maydell@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org 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=d38jY4simFrnlJfUaIg6Ld19y6Z/gEb6ier+sow9gQjw99actP9At2liLOaPcOt8H8 y8c9+tjELhLWG5vSwzV9H42GQBGJ0bLuqmr6yb1gq2tSUwCM2CucnW6EqI44aBkJFMtC YsFo49GXxcIHL71cZ9fDiozUT0ryoWTzJmYsRY5PcEjMbZKM7PrxxgKkURqE5HAx/jZI vbDt0+3ovd9R4Nz1sTAaZqmLcUHQW9r+1sUiQ7i3bem9SMvGyAIb/ulFFCq7/PZ1/MGP WKLC+iQUWvhkxSA3doNaVXwAjE9VCrwFiwDb26HfyswLcgC495Nv6whjjwJ/GPlStckM My4g== X-Gm-Message-State: AJIora9I5W455V7MG28rtlwyp9c9n5hevdTzet7sLb4yneubzDbl2q+d KeJ+u+6kuTYbOiKzCGbRVqzJkiy7PjTyeR96WkF3uFck 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" X-TUID: PUcsaFT50eBa 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