From patchwork Sun Apr 23 16:51:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 13221422 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 0B778C77B60 for ; Sun, 23 Apr 2023 16:51:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229478AbjDWQvm (ORCPT ); Sun, 23 Apr 2023 12:51:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229848AbjDWQvl (ORCPT ); Sun, 23 Apr 2023 12:51:41 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9330710F0 for ; Sun, 23 Apr 2023 09:51:39 -0700 (PDT) Received: from lhrpeml500005.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Q4Djd5g36z6J6J5; Mon, 24 Apr 2023 00:48:37 +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 15.1.2507.23; Sun, 23 Apr 2023 17:51:36 +0100 From: Jonathan Cameron To: , Michael Tsirkin , Fan Ni CC: , , Ira Weiny , Alison Schofield , Michael Roth , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Dave Jiang , Markus Armbruster , =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Eric Blake , Mike Maslenkin , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Thomas Huth Subject: [PATCH v5 0/7] QEMU CXL Provide mock CXL events and irq support Date: Sun, 23 Apr 2023 17:51:33 +0100 Message-ID: <20230423165140.16833-1-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.37.2 MIME-Version: 1.0 X-Originating-IP: [10.122.247.231] X-ClientProxiedBy: lhrpeml100004.china.huawei.com (7.191.162.219) 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 v5: Rebase including version number updates to 8.1 Depends on [PATCH 0/2] hw/cxl: CDAT file handling fixes. [PATCH v2 0/3] hw/cxl: Fix decoder commit and uncommit handling [PATCH 0/3] docs/cxl: Gathering of fixes for 8.0 CXL docs. [PATCH v5 0/3] hw/mem: CXL Type-3 Volatile Memory Support [PATCH v5 0/6] hw/cxl: Poison get, inject, clear Based on: Message-ID: 20230421132020.7408-1-Jonathan.Cameron@huawei.com Based on: Message-ID: 20230421135906.3515-1-Jonathan.Cameron@huawei.com Based on: Message-ID: 20230421134507.26842-1-Jonathan.Cameron@huawei.com Based on: Message-ID: 20230421160827.2227-1-Jonathan.Cameron@huawei.com Based on: Message-ID: 20230423162013.4535-1-Jonathan.Cameron@huawei.com Cover letter from earlier version One challenge here is striking the right balance between lots of constraints in the injection code to enforce particular reserved bits etc by breaking out all the flags as individual parameters vs having a reasonably concise API. I think this set strikes the right balance but others may well disagree :) Note that Ira raised the question of whether we should be automatically establishing the volatile flag based on the Device Physical Address of the injected error. My proposal is to not do so for now, but to possibly revisit tightening the checking of injected errors in future. Whilst the volatile flag is straight forwards, some of the other flags that could be automatically set (or perhaps checked for validiaty) are much more complex. Adding verification at this stage would greatly increase the complexity of the patch + we are missing other elements that would interact with this. I'm not concerned about potential breaking of backwards compatibility if it only related to the injection of errors that make no sense for a real device. CXL Event records inform the OS of various CXL device events. Thus far CXL memory devices are emulated and therefore don't naturally generate events. Add an event infrastructure and mock event injection. Previous versions included a bulk insertion of lots of events. However, this series focuses on providing the ability to inject individual events through QMP. Only the General Media Event is included in this series as an example. Other events can be added pretty easily once the infrastructure is acceptable. In addition, this version updates the code to be in line with the specification based on discussions around the kernel patches. Injection examples; { "execute": "cxl-inject-gen-media-event", "arguments": { "path": "/machine/peripheral/cxl-mem0", "log": "informational", "flags": 1, "physaddr": 1000, "descriptor": 3, "type": 3, "transaction-type": 192, "channel": 3, "device": 5, "component-id": "iras mem" }} { "execute": "cxl-inject-dram-event", "arguments": { "path": "/machine/peripheral/cxl-mem0", "log": "informational", "flags": 1, "physaddr": 1000, "descriptor": 3, "type": 3, "transaction-type": 192, "channel": 3, "rank": 17, "nibble-mask": 37421234, "bank-group": 7, "bank": 11, "row": 2, "column": 77, "correction-mask": [33, 44, 55, 66] }} { "execute": "cxl-inject-memory-module-event", "arguments": { "path": "/machine/peripheral/cxl-mem0", "log": "informational", "flags": 1, "type": 3, "health-status": 3, "media-status": 7, "additional-status": 33, "life-used": 30, "temperature": -15, "dirty-shutdown-count": 4, "corrected-volatile-error-count": 3233, "corrected-persistent-error-count": 1300 }} Ira Weiny (4): hw/cxl/events: Add event status register hw/cxl/events: Wire up get/clear event mailbox commands hw/cxl/events: Add event interrupt support hw/cxl/events: Add injection of General Media Events Jonathan Cameron (3): hw/cxl: Move CXLRetCode definition to cxl_device.h hw/cxl/events: Add injection of DRAM events hw/cxl/events: Add injection of Memory Module Events hw/cxl/cxl-device-utils.c | 43 +++++- hw/cxl/cxl-events.c | 248 ++++++++++++++++++++++++++++++ hw/cxl/cxl-mailbox-utils.c | 166 ++++++++++++++------ hw/cxl/meson.build | 1 + hw/mem/cxl_type3.c | 292 +++++++++++++++++++++++++++++++++++- hw/mem/cxl_type3_stubs.c | 35 +++++ include/hw/cxl/cxl_device.h | 80 +++++++++- include/hw/cxl/cxl_events.h | 168 +++++++++++++++++++++ qapi/cxl.json | 120 +++++++++++++++ 9 files changed, 1097 insertions(+), 56 deletions(-) create mode 100644 hw/cxl/cxl-events.c create mode 100644 include/hw/cxl/cxl_events.h