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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2AA59C61CE7 for ; Fri, 6 Jun 2025 18:39:15 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uNbwl-0004H5-4o; Fri, 06 Jun 2025 14:37:43 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uNbwX-0004EV-A4; Fri, 06 Jun 2025 14:37:29 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uNbwU-0008JE-Sw; Fri, 06 Jun 2025 14:37:29 -0400 Received: from pps.filterd (m0353729.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 556EdHOQ032452; Fri, 6 Jun 2025 18:37:25 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=y5nRbvidBri2PBGZw zAxcIAkdAvEIXB+q6dsfGdIfp8=; b=tbM69II8iZWe2mdOk7EUx73ualXKo/hIp q6nRm15KMBD48YVB95VAFWZeg2hRDDZxZxvpQAAo3pIozBNiGdXif9KiuWiAnrAQ v78ZtLvLLXD5JOvXHXV3Ga2jY5X7aw30U7zB7uYYspPYVfx+LTJHvkgj0O7TbEzc 8bgXudm1lFbSfS4uQkmK1S6LiHrgVdS0PzzxRAldtqZBIBF2V/aY6v6DFzN54iCk eraRywCgk2+k4wGe/zkSTb51WovOjdl2otAgKUIY87MSTxKrvOcBKs6PzGMYS/ow CX8NrJqoFdrvbl0YGSX1IATiFmmp1h2C7IQadqWl8r8NnbCCbBbHQ== Received: from ppma12.dal12v.mail.ibm.com (dc.9e.1632.ip4.static.sl-reverse.com [50.22.158.220]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 473j1y57s1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 06 Jun 2025 18:37:24 +0000 (GMT) Received: from pps.filterd (ppma12.dal12v.mail.ibm.com [127.0.0.1]) by ppma12.dal12v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 556GJq2k022517; Fri, 6 Jun 2025 18:37:23 GMT Received: from smtprelay03.wdc07v.mail.ibm.com ([172.16.1.70]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 470c3ttxrm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 06 Jun 2025 18:37:23 +0000 Received: from smtpav05.wdc07v.mail.ibm.com (smtpav05.wdc07v.mail.ibm.com [10.39.53.232]) by smtprelay03.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 556IbHY330409314 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Jun 2025 18:37:17 GMT Received: from smtpav05.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D617158043; Fri, 6 Jun 2025 18:37:21 +0000 (GMT) Received: from smtpav05.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A829558059; Fri, 6 Jun 2025 18:37:20 +0000 (GMT) Received: from MacBookPro.ibm.com (unknown [9.61.255.166]) by smtpav05.wdc07v.mail.ibm.com (Postfix) with ESMTP; Fri, 6 Jun 2025 18:37:20 +0000 (GMT) From: Rorie Reyes To: qemu-devel@nongnu.org, qemu-s390x@nongnu.org Cc: pbonzini@redhat.com, cohuck@redhat.com, pasic@linux.ibm.com, jjherne@linux.ibm.com, borntraeger@linux.ibm.com, alex.williamson@redhat.com, clg@redhat.com, thuth@redhat.com, akrowiak@linux.ibm.com, rreyes@linux.ibm.com Subject: [RFC PATCH v12 3/4] hw/vfio/ap: Storing event information for an AP configuration change event Date: Fri, 6 Jun 2025 14:37:15 -0400 Message-ID: <20250606183716.26152-4-rreyes@linux.ibm.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250606183716.26152-1-rreyes@linux.ibm.com> References: <20250606183716.26152-1-rreyes@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=Nezm13D4 c=1 sm=1 tr=0 ts=68433564 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=6IFa9wvqVegA:10 a=sWKEhP36mHoA:10 a=VnNF1IyMAAAA:8 a=cKQ_eDIM6AGRu3ddSD4A:9 X-Proofpoint-GUID: MqDJQCFVa3xsxr_DeVwBAdZjTx3xoqqi X-Proofpoint-ORIG-GUID: MqDJQCFVa3xsxr_DeVwBAdZjTx3xoqqi X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjA2MDE1OSBTYWx0ZWRfX27SMC+1HO6E1 Smq9eaFb7mv/tFHZdt3gw7TfCNWiSkuGdl3xiYz2AJVUJc65c/m5BcdcK/SEqTfqLry7yChEi9X FmToSv8kll8t1TDbb0NTnoik3O8WhyzRbJ1SCWUOuzZV8WlrFU2EWtdCxLae4f9PRkTxAdQbPzv KIljLlFHdYEUAhsO8gcNEz2eborks7/78qgfT72XNCzD/a/fAo9ItvSkalD9Zr4xD1pOdj6OMZC zaLwFcbltG9psGybT6YHPIjW9TCOEosfFJoLUX5tDDkXefKfboGnF8ZX8ZQOL5fk54Xgd+MZFED /22oVjfyvopHFtuZK5xWL6Y7nUUbXfwbLmT0w1xbLONGe7iI5PMh+Pxx1UAZv7ivfeE63l/ZeHS Ubn90gzoMk6GkgmLAxrU1oQ8nnUOuiYvEk8cU6un7kVL42tYlYz971iLse8RWrfoli0sM1DB X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-06-06_07,2025-06-05_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 clxscore=1015 bulkscore=0 phishscore=0 spamscore=0 mlxscore=0 malwarescore=0 suspectscore=0 mlxlogscore=965 lowpriorityscore=0 priorityscore=1501 adultscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2506060159 Received-SPF: pass client-ip=148.163.156.1; envelope-from=rreyes@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org These functions can be invoked by the function that handles interception of the CHSC SEI instruction for requests indicating the accessibility of one or more adjunct processors has changed. Signed-off-by: Rorie Reyes --- hw/vfio/ap.c | 43 ++++++++++++++++++++++++++++++++++++ include/hw/s390x/ap-bridge.h | 39 ++++++++++++++++++++++++++++++++ 2 files changed, 82 insertions(+) diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index fc435f5c5b..7e3c6278b3 100644 --- a/hw/vfio/ap.c +++ b/hw/vfio/ap.c @@ -10,6 +10,7 @@ * directory. */ +#include #include "qemu/osdep.h" #include CONFIG_DEVICES /* CONFIG_IOMMUFD */ #include @@ -21,6 +22,7 @@ #include "hw/s390x/css.h" #include "qemu/error-report.h" #include "qemu/event_notifier.h" +#include "qemu/lockable.h" #include "qemu/main-loop.h" #include "qemu/module.h" #include "qemu/option.h" @@ -48,6 +50,8 @@ typedef struct APConfigChgEvent { static QTAILQ_HEAD(, APConfigChgEvent) cfg_chg_events = QTAILQ_HEAD_INITIALIZER(cfg_chg_events); +static QemuMutex cfg_chg_events_lock; + OBJECT_DECLARE_SIMPLE_TYPE(VFIOAPDevice, VFIO_AP_DEVICE) static void vfio_ap_compute_needs_reset(VFIODevice *vdev) @@ -96,6 +100,38 @@ static void vfio_ap_cfg_chg_notifier_handler(void *opaque) } +int ap_chsc_sei_nt0_get_event(void *res) +{ + ChscSeiNt0Res *nt0_res = (ChscSeiNt0Res *)res; + APConfigChgEvent *cfg_chg_event; + + WITH_QEMU_LOCK_GUARD(&cfg_chg_events_lock) { + if (QTAILQ_EMPTY(&cfg_chg_events)) { + return EVENT_INFORMATION_NOT_STORED; + } + + cfg_chg_event = QTAILQ_FIRST(&cfg_chg_events); + QTAILQ_REMOVE(&cfg_chg_events, cfg_chg_event, next); + } + + memset(nt0_res, 0, sizeof(*nt0_res)); + g_free(cfg_chg_event); + nt0_res->flags |= PENDING_EVENT_INFO_BITMASK; + nt0_res->length = sizeof(ChscSeiNt0Res); + nt0_res->code = NT0_RES_RESPONSE_CODE; + nt0_res->nt = NT0_RES_NT_DEFAULT; + nt0_res->rs = NT0_RES_RS_AP_CHANGE; + nt0_res->cc = NT0_RES_CC_AP_CHANGE; + + return EVENT_INFORMATION_STORED; +} + +bool ap_chsc_sei_nt0_have_event(void) +{ + QEMU_LOCK_GUARD(&cfg_chg_events_lock); + return !QTAILQ_EMPTY(&cfg_chg_events); +} + static bool vfio_ap_register_irq_notifier(VFIOAPDevice *vapdev, unsigned int irq, Error **errp) { @@ -192,6 +228,13 @@ static void vfio_ap_realize(DeviceState *dev, Error **errp) VFIOAPDevice *vapdev = VFIO_AP_DEVICE(dev); VFIODevice *vbasedev = &vapdev->vdev; + static bool lock_initialized; + + if (!lock_initialized) { + qemu_mutex_init(&cfg_chg_events_lock); + lock_initialized = true; + } + if (!vfio_device_get_name(vbasedev, errp)) { return; } diff --git a/include/hw/s390x/ap-bridge.h b/include/hw/s390x/ap-bridge.h index 470e439a98..7efc52928d 100644 --- a/include/hw/s390x/ap-bridge.h +++ b/include/hw/s390x/ap-bridge.h @@ -16,4 +16,43 @@ void s390_init_ap(void); +typedef struct ChscSeiNt0Res { + uint16_t length; + uint16_t code; + uint8_t reserved1; + uint16_t reserved2; + uint8_t nt; +#define PENDING_EVENT_INFO_BITMASK 0x80; + uint8_t flags; + uint8_t reserved3; + uint8_t rs; + uint8_t cc; +} QEMU_PACKED ChscSeiNt0Res; + +#define NT0_RES_RESPONSE_CODE 1 +#define NT0_RES_NT_DEFAULT 0 +#define NT0_RES_RS_AP_CHANGE 5 +#define NT0_RES_CC_AP_CHANGE 3 + +#define EVENT_INFORMATION_NOT_STORED 1 +#define EVENT_INFORMATION_STORED 0 + +/** + * ap_chsc_sei_nt0_get_event - Retrieve the next pending AP config + * change event + * @res: Pointer to a ChscSeiNt0Res struct to be filled with event + * data + * + * This function checks for any pending AP config change events and, + * if present, populates the provided response structure with the + * appropriate SEI NT0 fields. + * + * Return: + * EVENT_INFORMATION_STORED - An event was available and written to @res + * EVENT_INFORMATION_NOT_STORED - No event was available + */ +int ap_chsc_sei_nt0_get_event(void *res); + +bool ap_chsc_sei_nt0_have_event(void); + #endif -- 2.48.1