From patchwork Mon Sep 4 16:18:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 13374173 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 C2E39C83F2C for ; Mon, 4 Sep 2023 16:18:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231378AbjIDQSz (ORCPT ); Mon, 4 Sep 2023 12:18:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53470 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234874AbjIDQSz (ORCPT ); Mon, 4 Sep 2023 12:18:55 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD780E8 for ; Mon, 4 Sep 2023 09:18:50 -0700 (PDT) Received: from lhrpeml500005.china.huawei.com (unknown [172.18.147.226]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4RfYgt6jXfz67Nsw; Tue, 5 Sep 2023 00:17:30 +0800 (CST) Received: from SecurePC-101-06.china.huawei.com (10.122.247.231) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.31; Mon, 4 Sep 2023 17:18:47 +0100 From: Jonathan Cameron To: , Michael Tsirkin , Fan Ni , CC: Dave Jiang , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Subject: [PATCH v2 0/3] hw/cxl: Add dummy ACPI QTG DSM Date: Mon, 4 Sep 2023 17:18:44 +0100 Message-ID: <20230904161847.18468-1-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 X-Originating-IP: [10.122.247.231] X-ClientProxiedBy: lhrpeml500002.china.huawei.com (7.191.160.78) To lhrpeml500005.china.huawei.com (7.191.163.240) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org v2 updates: - Edit of patch description to not confuse matters by mentioning switches. - Associated ACPI test updates. CXL platforms may support the concept of QoS Thottling groups (QTG). Typically you want to associate devices with similar performance with the same QTG. As there is no standard way of understanding the relationship between expected performance and appropriate QTG the platform firmware provides a query mechanism via ACPI Device Specific Method (DSM) with parameters of the performance numbers that returns the appropriate QTG ID. This support is basically stubbing out that function so that it always returns 0. For now that is sufficient for current CXL emulation usecases. Based on: [PATCH 0/4] hw/cxl: Minor CXL emulation fixes and cleanup Based on: Message ID: 20230904132806.6094-1-Jonathan.Cameron@huawei.com Dave Jiang (1): hw/cxl: Add QTG _DSM support for ACPI0017 device Jonathan Cameron (2): tests/acpi: Allow update of DSDT.cxl tests/acpi: Update DSDT.cxl with QTG DSM include/hw/acpi/cxl.h | 1 + hw/acpi/cxl.c | 57 +++++++++++++++++++++++++++++++++++ hw/i386/acpi-build.c | 1 + tests/data/acpi/q35/DSDT.cxl | Bin 9655 -> 9723 bytes 4 files changed, 59 insertions(+)