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Fri, 23 May 2025 04:47:47 GMT Received: from smtprelay02.wdc07v.mail.ibm.com ([172.16.1.69]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 46rwnnmwu7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 23 May 2025 04:47:46 +0000 Received: from smtpav01.dal12v.mail.ibm.com (smtpav01.dal12v.mail.ibm.com [10.241.53.100]) by smtprelay02.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 54N4ljU162980416 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 23 May 2025 04:47:45 GMT Received: from smtpav01.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EA3845805D; Fri, 23 May 2025 04:47:44 +0000 (GMT) Received: from smtpav01.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2C5AF58058; Fri, 23 May 2025 04:47:44 +0000 (GMT) Received: from localhost.localdomain (unknown [9.61.243.208]) by smtpav01.dal12v.mail.ibm.com (Postfix) with ESMTP; Fri, 23 May 2025 04:47:44 +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 v10 3/4] hw/vfio/ap: Storing event information for an AP configuration change event Date: Fri, 23 May 2025 00:47:40 -0400 Message-ID: <20250523044741.59936-4-rreyes@linux.ibm.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250523044741.59936-1-rreyes@linux.ibm.com> References: <20250523044741.59936-1-rreyes@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=SMZCVPvH c=1 sm=1 tr=0 ts=682ffdf3 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=dt9VzEwgFbYA:10 a=sWKEhP36mHoA:10 a=VnNF1IyMAAAA:8 a=cKQ_eDIM6AGRu3ddSD4A:9 X-Proofpoint-GUID: 81hGvnI2KuRTmg8lMstwWdJYgX-6NnCT X-Proofpoint-ORIG-GUID: 81hGvnI2KuRTmg8lMstwWdJYgX-6NnCT X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTIzMDAzOCBTYWx0ZWRfX5R8sLccUm5Jm mLQMyzOfewVMkJAXAs52JhpG3JupwCdmlft1+HtqoI1GOtvgfavZZQOGecCGp4l6jSAQdibqELY +6p8dAD46/zbtnV/z7MFvyddcgM0QDiav10Mm1efVaZ/iaMa8dOqPeNJ6YYSXxhZSdKF83AOIqq 4JxTlcff2fjD4+UKDfG8vNZvuMCDL2q635eP4WyA56z0+di0lPssU8ehVonCY0bxAnhltihP82X mHaDUxRKr7VfwZmULT3BiHCjhe4Oa87SoGit29HrFj9zPKBQ06bDgm6S9me7RuVfyYxocKcALsU 7tOh3hwfa/81RmUf6JlvVaQVs1i7LTDKyySfc2vjgG043HpD89inbP/aZ0T9RcyN943A/uO6oKS mki/6ce58xayQXfrc0YV7D8Qfxhc22WyjJsotrizneH8X4qXFQCWEFUO5T0meJ9061x0y2AR 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=2025-05-23_02,2025-05-22_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxlogscore=999 suspectscore=0 bulkscore=0 clxscore=1015 adultscore=0 phishscore=0 mlxscore=0 impostorscore=0 spamscore=0 lowpriorityscore=0 malwarescore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505160000 definitions=main-2505230038 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_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_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 | 53 ++++++++++++++++++++++++++++++++++++ include/hw/s390x/ap-bridge.h | 36 ++++++++++++++++++++++++ 2 files changed, 89 insertions(+) diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index fc435f5c5b..a6b4514606 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 @@ -48,6 +49,8 @@ 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 +99,49 @@ static void vfio_ap_cfg_chg_notifier_handler(void *opaque) } +bool ap_chsc_sei_nt0_get_event(void *res) +{ + ChscSeiNt0Res *nt0_res = (ChscSeiNt0Res *)res; + APConfigChgEvent *cfg_chg_event; + + qemu_mutex_lock(&cfg_chg_events_lock); + + if (!ap_chsc_sei_nt0_have_event()) { + qemu_mutex_unlock(&cfg_chg_events_lock); + return true; + } + + cfg_chg_event = QTAILQ_FIRST(&cfg_chg_events); + QTAILQ_REMOVE(&cfg_chg_events, cfg_chg_event, next); + + qemu_mutex_unlock(&cfg_chg_events_lock); + + memset(nt0_res, 0, sizeof(*nt0_res)); + g_free(cfg_chg_event); + + /* + * If there are any AP configuration change events in the queue, + * indicate to the caller that there is pending event info in + * the response block + */ + if (ap_chsc_sei_nt0_have_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 false; +} + +bool ap_chsc_sei_nt0_have_event(void) +{ + return !QTAILQ_EMPTY(&cfg_chg_events); +} + static bool vfio_ap_register_irq_notifier(VFIOAPDevice *vapdev, unsigned int irq, Error **errp) { @@ -192,6 +238,13 @@ 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..ae31532f6e 100644 --- a/include/hw/s390x/ap-bridge.h +++ b/include/hw/s390x/ap-bridge.h @@ -16,4 +16,40 @@ 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 + +/** + * 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: + * false - An event was available and written to @res + * true - No event was available + */ +bool ap_chsc_sei_nt0_get_event(void *res); + +bool ap_chsc_sei_nt0_have_event(void); + #endif -- 2.48.1