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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) 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=dcP2o7DN36bf0Cm4C xEa62CdUnWfV5qXAzKPfZBWoO0=; b=mTxz9ACw7quyT3PMnPo4JHg3R9lNMaWxg Cnhx/Z2S0AMq3o6WABPF8ssxjfoFOnMpxRXlES66UaxU7ArUUQgoiqaCas7OIv35 hlVaoDjshwNHqTbDdVDiWeqDWb+gMeNQmM+CP1pOkBNXpqWJKlHFeHDzmoLNBoht hZuPJ5uFV5B6jKumPVN+aIFp0O+7yPrJ8UD2cocAN7jMeADiJ0S2CvKvcApeUzMV gY9D9fDJYxIL/6WxQyyEycJmi7czWle8l3ZjRw7sp96dlJc2Hz/Rk4o51pvsBG99 K/MpJOosJ3nid4ADSnn5talalALPqAUAT1IRbk0SrhgbWVfOiLj7A== 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: quoted-printable 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 (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_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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1747975734843116600 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 --- 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. */ =20 +#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 =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 +99,49 @@ static void vfio_ap_cfg_chg_notifier_handler(void *opaqu= e) =20 } =20 +bool ap_chsc_sei_nt0_get_event(void *res) +{ + ChscSeiNt0Res *nt0_res =3D (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 =3D 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 |=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 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 =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..ae31532f6e 100644 --- a/include/hw/s390x/ap-bridge.h +++ b/include/hw/s390x/ap-bridge.h @@ -16,4 +16,40 @@ =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 + +/** + * 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 --=20 2.48.1