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Fri, 6 Jun 2025 18:37:19 +0000 (GMT) Received: from smtpav05.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 02F7458059; Fri, 6 Jun 2025 18:37:18 +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 18:37:17 +0000 (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=/N3U4t3LiiReJXxka GTq63I6YAr4N0FuMqvFbBhGAy0=; b=OuC/fcSIA8MLTEngNKTGLuMI0XPcBb9Db HDup4lT1Ir5kvVHkBiQQJnqL5WlxugFccE1Ia+gIQ9dfON3wKJEiSLEYtyeZg8Gh 3inAHN/FyVXj6X+2BMHh41pjsIQnq4gGHhiEbSOuhle+oTNqsuhjaRMMSLdsqRpD yeiaymLDaObzO7cD/g+Ou2kkwAig0EruxEvcn+1ZE/iFPLeKmPaDE74xmuQa91wC yJf/u2xNilWpFxYEVXT2Or3CXikqEg+1n4zzpE0mjzq/uU+KwIBBGzAFA9wXKykg xw5+VfdbtBo2GmbEkM7FlY/y+Q5SX9GeF6TKThrJEyNDOO0ZRLCdA== 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 1/4] hw/vfio/ap: notification handler for AP config changed event Date: Fri, 6 Jun 2025 14:37:13 -0400 Message-ID: <20250606183716.26152-2-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: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: hUvawCydIqPCwkoWCFElpAcREXCQO9mD X-Authority-Analysis: v=2.4 cv=DYMXqutW c=1 sm=1 tr=0 ts=68433561 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=6IFa9wvqVegA:10 a=sWKEhP36mHoA:10 a=VnNF1IyMAAAA:8 a=cI7fhctStQOMI3-b00QA:9 X-Proofpoint-GUID: hUvawCydIqPCwkoWCFElpAcREXCQO9mD X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjA2MDE1OSBTYWx0ZWRfX0jQChyrLDbO1 uoCoJoNh9tRlqND0fLKCTEPhBF2FHvXUV5fAeUwNOW/0sdv4xcx4ozZQlmOk2g+c7j9idreaBlG INfEt1BtBo4szej1Cr395I7EAkuJHDfeQXlTcngRExpu/aYKRD/tzxIWuLv6/FumudrBFX6tyz9 P4fz5nZvSdEEAb10A+x4QirXaDw74ESUQi++64BFn23D1FLSh99JDO0WCNoPyKOiSMWUe6fHR/Y i8xtCqW2pH21rRHNpdsWmvlQ0OsWuPi2kSut0r9/LPAGVaglwuayPj0TltSN1h98Upck+N1dcm3 EbAOjqZVWjU3i6dKukq1y0Pq6/8z3OiGhlYbhD/avGV4mwnxG0iQeDi5J1Xa0GV2gPW9VxO2RPk I6zPH/WKLq/NuZSf15cc1fbYQME+pM0RdKieT6JCNTX4Bq9LMnxqx72Hq4ueyBbZOrILlvUX 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 lowpriorityscore=0 suspectscore=0 spamscore=0 mlxscore=0 priorityscore=1501 clxscore=1015 phishscore=0 mlxlogscore=999 adultscore=0 malwarescore=0 bulkscore=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 (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1749235096513116600 Content-Type: text/plain; charset="utf-8" Register an event notifier handler to process AP configuration change events by queuing the event and generating a CRW to let the guest know its AP configuration has changed Signed-off-by: Rorie Reyes Reviewed-by: Anthony Krowiak --- hw/vfio/ap.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index 785c0a0197..93c74ebedb 100644 --- a/hw/vfio/ap.c +++ b/hw/vfio/ap.c @@ -18,6 +18,7 @@ #include "hw/vfio/vfio-device.h" #include "system/iommufd.h" #include "hw/s390x/ap-device.h" +#include "hw/s390x/css.h" #include "qemu/error-report.h" #include "qemu/event_notifier.h" #include "qemu/main-loop.h" @@ -37,6 +38,7 @@ struct VFIOAPDevice { APDevice apdev; VFIODevice vdev; EventNotifier req_notifier; + EventNotifier cfg_notifier; }; =20 OBJECT_DECLARE_SIMPLE_TYPE(VFIOAPDevice, VFIO_AP_DEVICE) @@ -70,6 +72,18 @@ static void vfio_ap_req_notifier_handler(void *opaque) } } =20 +static void vfio_ap_cfg_chg_notifier_handler(void *opaque) +{ + VFIOAPDevice *vapdev =3D opaque; + + if (!event_notifier_test_and_clear(&vapdev->cfg_notifier)) { + return; + } + + css_generate_css_crws(0); + +} + static bool vfio_ap_register_irq_notifier(VFIOAPDevice *vapdev, unsigned int irq, Error **errp) { @@ -85,6 +99,10 @@ static bool vfio_ap_register_irq_notifier(VFIOAPDevice *= vapdev, notifier =3D &vapdev->req_notifier; fd_read =3D vfio_ap_req_notifier_handler; break; + case VFIO_AP_CFG_CHG_IRQ_INDEX: + notifier =3D &vapdev->cfg_notifier; + fd_read =3D vfio_ap_cfg_chg_notifier_handler; + break; default: error_setg(errp, "vfio: Unsupported device irq(%d)", irq); return false; @@ -137,6 +155,9 @@ static void vfio_ap_unregister_irq_notifier(VFIOAPDevic= e *vapdev, case VFIO_AP_REQ_IRQ_INDEX: notifier =3D &vapdev->req_notifier; break; + case VFIO_AP_CFG_CHG_IRQ_INDEX: + notifier =3D &vapdev->cfg_notifier; + break; default: error_report("vfio: Unsupported device irq(%d)", irq); return; @@ -176,6 +197,15 @@ static void vfio_ap_realize(DeviceState *dev, Error **= errp) warn_report_err(err); } =20 + if (!vfio_ap_register_irq_notifier(vapdev, VFIO_AP_CFG_CHG_IRQ_INDEX, = &err)) + { + /* + * Report this error, but do not make it a failing condition. + * Lack of this IRQ in the host does not prevent normal operation. + */ + warn_report_err(err); + } + return; =20 error: @@ -188,6 +218,7 @@ static void vfio_ap_unrealize(DeviceState *dev) VFIOAPDevice *vapdev =3D VFIO_AP_DEVICE(dev); =20 vfio_ap_unregister_irq_notifier(vapdev, VFIO_AP_REQ_IRQ_INDEX); + vfio_ap_unregister_irq_notifier(vapdev, VFIO_AP_CFG_CHG_IRQ_INDEX); vfio_device_detach(&vapdev->vdev); g_free(vapdev->vdev.name); } --=20 2.48.1 From nobody Sat Nov 15 17:17:26 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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Fri, 6 Jun 2025 18:37:19 +0000 (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=FoieamDphR6BVN3AY Knz1tn0I6TeyjhiF6BeTGsmbaM=; b=b/hI5I4Hn26btWSeM+d+odWmZHHWaLs/H NliEO7vtpJuVSByYmE0wP68OeiO6uBslIciO5jmTDrD7vE72bEvLyi/2W+ZH7kTD YRffOgnGpnZQNUBGLFFuYK86gYwXlLVy/s63FpOqF+2BkFChO0wiUfa/1YbGRlHK 3JyydKWHj8BH41Jj11NAGd5JJoTP3p09AOwUcCppQmmI3auH0symTbcQMxOtS1C1 EUo9rXXs/rrCsFQ0mxmDXLzF6aOxwLiEv4MBIjmhXuXwriHhGSuIMH9XU2OnjpD7 g1NDI+RjEokveRqGPHJPvOces3FohNo53vQT3IEA/0EHVyTjBaqyQ== 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 2/4] hw/vfio/ap: store object indicating AP config changed in a queue Date: Fri, 6 Jun 2025 14:37:14 -0400 Message-ID: <20250606183716.26152-3-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: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: m7aC5jCkwrFIHPFgw11kiYaOORmbIsX- X-Proofpoint-ORIG-GUID: m7aC5jCkwrFIHPFgw11kiYaOORmbIsX- X-Authority-Analysis: v=2.4 cv=X4dSKHTe c=1 sm=1 tr=0 ts=68433563 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=6IFa9wvqVegA:10 a=VnNF1IyMAAAA:8 a=n_lu--N5RhutrOJcQFMA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjA2MDE1OSBTYWx0ZWRfX4GCPR7ef39gU bM9TpmtzQ42y1LqOyECrwZdSdEIP36clT9r3hZgSe/h/IgKQhdHZKbbKAtOJ4UOYFZFXneu0xaH TwxlmxxQV9Jbwa6uyjmC/2pgMQYU9k9pEFbqiKX7R/qIFcNBBXZ0jzJknUcS948RD+ceUJ/Mt+c S/KIU62uAs+CH+zsnjYXu+Dkb91cfjUjnp8kMaIBB+URfiHoeo/I/l1DpfHYiwnhaEtGegV3bwQ aCNjhvnNpVlQq2im+HQGOSitLOQ2ueaP2/sYvwWckZFvuHQaGXlu2biQtEsAPqVWogvOYsRgGuB Moq0/RiJ/WTCjgDIUmNRszuqpMOOrQAnksx8f4oX+sJuGDLYg3Y6fMNTi2aYdFH9gGgtE+fBbRG lzrvgXll3cfROBqOj94eFuE0YB730+UPzHc2Vz0ozgleg4vAjHRPew7UNLSizr11pmjZ8pXA 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 suspectscore=0 priorityscore=1501 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 clxscore=1015 phishscore=0 bulkscore=0 malwarescore=0 spamscore=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 (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=148.163.158.5; envelope-from=rreyes@linux.ibm.com; helo=mx0b-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_PASS=-0.001, T_SPF_HELO_TEMPERROR=0.01 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1749235150759116600 Content-Type: text/plain; charset="utf-8" Creates an object indicating that an AP configuration change event has been received and stores it in a queue. These objects will later be used to store event information for an AP configuration change when the CHSC instruction is intercepted. Signed-off-by: Rorie Reyes Reviewed-by: Anthony Krowiak --- hw/vfio/ap.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index 93c74ebedb..fc435f5c5b 100644 --- a/hw/vfio/ap.c +++ b/hw/vfio/ap.c @@ -41,6 +41,13 @@ struct VFIOAPDevice { EventNotifier cfg_notifier; }; =20 +typedef struct APConfigChgEvent { + QTAILQ_ENTRY(APConfigChgEvent) next; +} APConfigChgEvent; + +static QTAILQ_HEAD(, APConfigChgEvent) cfg_chg_events =3D + QTAILQ_HEAD_INITIALIZER(cfg_chg_events); + OBJECT_DECLARE_SIMPLE_TYPE(VFIOAPDevice, VFIO_AP_DEVICE) =20 static void vfio_ap_compute_needs_reset(VFIODevice *vdev) @@ -74,12 +81,17 @@ static void vfio_ap_req_notifier_handler(void *opaque) =20 static void vfio_ap_cfg_chg_notifier_handler(void *opaque) { + APConfigChgEvent *cfg_chg_event; VFIOAPDevice *vapdev =3D opaque; =20 if (!event_notifier_test_and_clear(&vapdev->cfg_notifier)) { return; } =20 + cfg_chg_event =3D g_new0(APConfigChgEvent, 1); + + QTAILQ_INSERT_TAIL(&cfg_chg_events, cfg_chg_event, next); + css_generate_css_crws(0); =20 } --=20 2.48.1 From nobody Sat Nov 15 17:17:26 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=reject dis=none) header.from=linux.ibm.com ARC-Seal: i=1; a=rsa-sha256; t=1749235155; cv=none; d=zohomail.com; s=zohoarc; b=Nmp9/IGDmfCyJPdkZa0Mrj1kolyJXXn9xZDMIjgBCjWzZXHO8593E4p7kFVs+KINkrvapFnEhbIERTCwYr7e+C7cTVIjFnw835GvWgoczoVKcemYCcfJAoR9mP6tL1PPfhODlHB27e5euzHacGov9cBF3NgkY9+b4MRDOnlsX7s= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1749235155; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=y5nRbvidBri2PBGZwzAxcIAkdAvEIXB+q6dsfGdIfp8=; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1749235156880116600 Content-Type: text/plain; charset="utf-8" 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 Reviewed-by: Anthony Krowiak --- 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. */ =20 +#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 =3D QTAILQ_HEAD_INITIALIZER(cfg_chg_events); =20 +static QemuMutex cfg_chg_events_lock; + OBJECT_DECLARE_SIMPLE_TYPE(VFIOAPDevice, VFIO_AP_DEVICE) =20 static void vfio_ap_compute_needs_reset(VFIODevice *vdev) @@ -96,6 +100,38 @@ static void vfio_ap_cfg_chg_notifier_handler(void *opaq= ue) =20 } =20 +int ap_chsc_sei_nt0_get_event(void *res) +{ + ChscSeiNt0Res *nt0_res =3D (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 =3D 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 |=3D PENDING_EVENT_INFO_BITMASK; + nt0_res->length =3D sizeof(ChscSeiNt0Res); + nt0_res->code =3D NT0_RES_RESPONSE_CODE; + nt0_res->nt =3D NT0_RES_NT_DEFAULT; + nt0_res->rs =3D NT0_RES_RS_AP_CHANGE; + nt0_res->cc =3D 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 =3D VFIO_AP_DEVICE(dev); VFIODevice *vbasedev =3D &vapdev->vdev; =20 + static bool lock_initialized; + + if (!lock_initialized) { + qemu_mutex_init(&cfg_chg_events_lock); + lock_initialized =3D 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 @@ =20 void s390_init_ap(void); =20 +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); 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1749235098157116600 Handle interception of the CHSC SEI instruction for requests indicating the guest's AP configuration has changed. If configuring --without-default-devices, hw/s390x/ap-stub.c was created to handle such circumstance. Also added the following to hw/s390x/meson.build if CONFIG_VFIO_AP is false, it will use the stub file. Signed-off-by: Rorie Reyes Reviewed-by: Anthony Krowiak Reviewed-by: C=C3=A9dric Le Goater --- MAINTAINERS | 1 + hw/s390x/ap-stub.c | 21 +++++++++++++++++++++ hw/s390x/meson.build | 1 + target/s390x/ioinst.c | 11 +++++++++-- 4 files changed, 32 insertions(+), 2 deletions(-) create mode 100644 hw/s390x/ap-stub.c diff --git a/MAINTAINERS b/MAINTAINERS index aa6763077e..1e84bfeaee 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -112,6 +112,7 @@ F: hw/intc/s390_flic.c F: hw/intc/s390_flic_kvm.c F: hw/s390x/ F: hw/vfio/ap.c +F: hw/s390x/ap-stub.c F: hw/vfio/ccw.c F: hw/watchdog/wdt_diag288.c F: include/hw/s390x/ diff --git a/hw/s390x/ap-stub.c b/hw/s390x/ap-stub.c new file mode 100644 index 0000000000..001fe5f8b0 --- /dev/null +++ b/hw/s390x/ap-stub.c @@ -0,0 +1,21 @@ +/* + * VFIO based AP matrix device assignment + * + * Copyright 2025 IBM Corp. + * Author(s): Rorie Reyes + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "hw/s390x/ap-bridge.h" + +int ap_chsc_sei_nt0_get_event(void *res) +{ + return EVENT_INFORMATION_NOT_STORED; +} + +bool ap_chsc_sei_nt0_have_event(void) +{ + return false; +} diff --git a/hw/s390x/meson.build b/hw/s390x/meson.build index 3bbebfd817..99cbcbd7d6 100644 --- a/hw/s390x/meson.build +++ b/hw/s390x/meson.build @@ -33,6 +33,7 @@ s390x_ss.add(when: 'CONFIG_S390_CCW_VIRTIO', if_true: fil= es( )) s390x_ss.add(when: 'CONFIG_TERMINAL3270', if_true: files('3270-ccw.c')) s390x_ss.add(when: 'CONFIG_VFIO', if_true: files('s390-pci-vfio.c')) +s390x_ss.add(when: 'CONFIG_VFIO_AP', if_false: files('ap-stub.c')) =20 virtio_ss =3D ss.source_set() virtio_ss.add(files('virtio-ccw.c')) diff --git a/target/s390x/ioinst.c b/target/s390x/ioinst.c index fe62ba5b06..2320dd4c12 100644 --- a/target/s390x/ioinst.c +++ b/target/s390x/ioinst.c @@ -18,6 +18,7 @@ #include "trace.h" #include "hw/s390x/s390-pci-bus.h" #include "target/s390x/kvm/pv.h" +#include "hw/s390x/ap-bridge.h" =20 /* All I/O instructions but chsc use the s format */ static uint64_t get_address_from_regs(CPUS390XState *env, uint32_t ipb, @@ -574,13 +575,19 @@ out: =20 static int chsc_sei_nt0_get_event(void *res) { - /* no events yet */ + if (s390_has_feat(S390_FEAT_AP)) { + return ap_chsc_sei_nt0_get_event(res); + } + return 1; } =20 static int chsc_sei_nt0_have_event(void) { - /* no events yet */ + if (s390_has_feat(S390_FEAT_AP)) { + return ap_chsc_sei_nt0_have_event(); + } + return 0; } =20 --=20 2.48.1