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Tue, 7 Jan 2025 18:43:56 +0000 (GMT) Received: from smtpav01.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B80D058058; Tue, 7 Jan 2025 18:43:55 +0000 (GMT) Received: from localhost.localdomain (unknown [9.12.78.174]) by smtpav01.dal12v.mail.ibm.com (Postfix) with ESMTP; Tue, 7 Jan 2025 18:43:55 +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=GpzwVFe2I6Yk5SZ8t ySdyYobiM3eUVaKLJ1IhAVx7pI=; b=szKoVE3n59oa8Qghrli2S1rWU4Wf2b8Me VT+kKt4E4VhVqRMRAVgZzwPnxCvRUKqfE9ZBajgnF0cK6uImpAAeTk/5Y6XsKgaC PEjGtdS+xcKOWC/Q1MwNccUu+DonmUkASfYGcKiAqj1Ssg0JiUrKwTdAR2x5eAMn i7bi2h0C64iYN+Hmx/G+nB8g/cIMUXyw96pysVLnxROdRtdF4ZuBS8oqHMLTeK/q O0OyFVbKtfGhPdWJVWMrP+w6TjpxzhwVuSnk+FHQK3V++ExgZa/3bw5a7JCR/26o j0Yft+75h7EM42mtVnksRHSwkn7z46kwELPwDuBwvD+UhMUIFCr8Q== 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 Subject: [PATCH v1 1/5] linux-headers: NOTFORMERGE - placeholder uapi updates for AP config change Date: Tue, 7 Jan 2025 13:43:50 -0500 Message-Id: <20250107184354.91079-2-rreyes@linux.ibm.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20250107184354.91079-1-rreyes@linux.ibm.com> References: <20250107184354.91079-1-rreyes@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Q-edtH_3ED25rL16bZyh3XpnmNpwaqKg X-Proofpoint-ORIG-GUID: Q-edtH_3ED25rL16bZyh3XpnmNpwaqKg X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-15_01,2024-10-11_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 mlxscore=0 adultscore=0 mlxlogscore=999 impostorscore=0 priorityscore=1501 clxscore=1011 lowpriorityscore=0 spamscore=0 suspectscore=0 phishscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2501070153 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" This patch adds enumeration constant VFIO_AP_CFG_CHG_IRQ_INDEX to specify an IRQ index for signaling that a change has been made to the guest's AP configuration. This is a placeholder for QEMU patches that use this value since it is a linux-headers update which includes changes that aren't merged into the kernel. Linux-headers patches should be generated using scripts/update-linux-headers.sh. Signed-off-by: Rorie Reyes --- linux-headers/linux/vfio.h | 1 + 1 file changed, 1 insertion(+) diff --git a/linux-headers/linux/vfio.h b/linux-headers/linux/vfio.h index 1b5e254d6a..d0426b5ec0 100644 --- a/linux-headers/linux/vfio.h +++ b/linux-headers/linux/vfio.h @@ -671,6 +671,7 @@ enum { */ enum { VFIO_AP_REQ_IRQ_INDEX, + VFIO_AP_CFG_CHG_IRQ_INDEX, VFIO_AP_NUM_IRQS }; =20 --=20 2.39.5 (Apple Git-154) From nobody Sun Apr 6 22:20:49 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=1736283659; cv=none; d=zohomail.com; s=zohoarc; b=dIL28wqzJzLoCV2qb/EjVR/rZVDOyC2t0wxhQ47WY8l+pZtwPAi1yjtEv8QuOiI0HGf8zl4AQOFVkRE0KpIFosHw4XAK0rnAI69CxhfTmFcgrgmjE+mrcI7NbzcEoUqsy7sYNCsif7ECLuiFHhdnUEQ/0PP+KsOI9C4WaZ0Rvyo= ARC-Message-Signature: i=1; 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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=4Wc10A89t8PSIKvin BDCHkto/9c64GQDqPpzlOX9vII=; b=kPutYu0Qc8jrvyFDpNa2os/h1VgfcveV7 XdAPLcSt7CvIP9xwOfrZu5i7b0RJHfc5O5X4bKM3gY+iMSZYxoV2LqhpqChvqHYn vr/TMah6/hdra3NP3Y1b0/bALzwpiC/PmXcs29R4Ogewc71BgRGdbZl3qZHUoP/p swi6cwl1N6Z+fkVNZUmrcXe5oZTJ9rKPxjX49/NLbfeS0rXwwx3zGHN/7HVN8rik 9kCYD4n/mwf2vTSJDDGw8xsX4I2u0xht0x7CNPk8Krm7k0dzTx86rKxKnGimknL8 lKhMtBIR+QTqQi/KIQOH6PyNiw+Pz4OZjRIr/cg8oR2yb3S8O5yqA== 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 Subject: [PATCH v1 2/5] hw/vfio/ap: notification handler for AP config changed event Date: Tue, 7 Jan 2025 13:43:51 -0500 Message-Id: <20250107184354.91079-3-rreyes@linux.ibm.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20250107184354.91079-1-rreyes@linux.ibm.com> References: <20250107184354.91079-1-rreyes@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: fMuV67uo-QSU-yBtCOCiipn333EkLfjw X-Proofpoint-GUID: fMuV67uo-QSU-yBtCOCiipn333EkLfjw X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-15_01,2024-10-11_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 suspectscore=0 phishscore=0 clxscore=1015 adultscore=0 bulkscore=0 impostorscore=0 malwarescore=0 mlxscore=0 priorityscore=1501 lowpriorityscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2501070153 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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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 Tested-by: Anthony Krowiak --- hw/vfio/ap.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index 30b08ad375..533cadb2dd 100644 --- a/hw/vfio/ap.c +++ b/hw/vfio/ap.c @@ -18,6 +18,7 @@ #include "hw/vfio/vfio-common.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)) { + warn_report("Event notifier not initialized"); + 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; @@ -175,6 +193,15 @@ 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: --=20 2.39.5 (Apple Git-154) From nobody Sun Apr 6 22:20:49 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=1736283629; cv=none; d=zohomail.com; s=zohoarc; b=RMZRKBAthTAnbF/8wiwFTPr90c1xv26X+LPK09o2DEM7SHxXE4Kqd4NhMAMLMDdlftIjOKFxon+HxIA26ctiONSZnwF6JXffNneXSPmTk696jaH2XgdU+X80cOl67zhStX5kseGgbGNAnhKNihnOtSvqIWBnEbXpInJI5hUooOI= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1736283629; 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=hsK87puey5ZsU88h7Bk+wH/XIJLvmKDRVo6nYsUfE40=; 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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 Tested-by: Anthony Krowiak --- hw/vfio/ap.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index 533cadb2dd..508c6eed7a 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; + +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) @@ -76,6 +83,9 @@ static void vfio_ap_cfg_chg_notifier_handler(void *opaque) { VFIOAPDevice *vapdev =3D opaque; =20 + APConfigChgEvent *new_event =3D g_new0(APConfigChgEvent, 1); + + QTAILQ_INSERT_TAIL(&cfg_chg_events, new_event, next); if (!event_notifier_test_and_clear(&vapdev->cfg_notifier)) { warn_report("Event notifier not initialized"); return; --=20 2.39.5 (Apple Git-154) From nobody Sun Apr 6 22:20:49 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=1736283694; cv=none; d=zohomail.com; s=zohoarc; b=lDu38ZM0Gysqqe/G8qEL8HuOIzdEq+Ngls2o70fnINxDJpM2QmwEQIb+WNr+lXeMeqspMNF8HepqkTLgiWquwQCJQvCTMTCiOvixY455+p1RD9tuSyIkpfUhLXHTH2KnaY85aYQIhRikqGU9C0x5lP2WTEd+YtiYB5AV+wYUyow= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1736283694; 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=SzCnmuDHwZImq6txCeTPY9bwgri6jpswk1Wf+tRGCu0=; b=dq5/Q7g5LwC2z2uEnV3bL9f/wcuVt4jaNlgF0ZAl22G5w/8FAR53VPh707cEyc6C/TstulQ64JcS7I15lLkXMO1UDwZtR3jQLpgz7DfxSUQ4H90cJ922jsvmmkNFMVuD0U0mNQVVhqOMIEjyvYajOs06WzrBq7+SxSlipP8nuf0= ARC-Authentication-Results: i=1; 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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 | 37 ++++++++++++++++++++++++++++++++++++ include/hw/s390x/ap-bridge.h | 17 +++++++++++++++++ 2 files changed, 54 insertions(+) diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index 508c6eed7a..9d1e18f100 100644 --- a/hw/vfio/ap.c +++ b/hw/vfio/ap.c @@ -94,6 +94,43 @@ static void vfio_ap_cfg_chg_notifier_handler(void *opaqu= e) css_generate_css_crws(0); } =20 +int ap_chsc_sei_nt0_get_event(void *res) +{ + APConfigChgEvent *cfg_chg_event =3D QTAILQ_FIRST(&cfg_chg_events); + ChscSeiNt0Res *nt0_res =3D (ChscSeiNt0Res *)res; + memset(nt0_res, 0, sizeof(*nt0_res)); + int rc =3D 1; + + if (cfg_chg_event) { + QTAILQ_REMOVE(&cfg_chg_events, cfg_chg_event, next); + 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 (!QTAILQ_EMPTY(&cfg_chg_events)) { + nt0_res->flags |=3D PENDING_EVENT_INFO_BITMASK; + } + + nt0_res->length =3D sizeof(ChscSeiNt0Res); + nt0_res->code =3D 1; + nt0_res->nt =3D 0; + nt0_res->rs =3D 5; + nt0_res->cc =3D 3; + + rc =3D 0; + } + + return rc; +} + +int 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) { diff --git a/include/hw/s390x/ap-bridge.h b/include/hw/s390x/ap-bridge.h index 470e439a98..c9beec3db4 100644 --- a/include/hw/s390x/ap-bridge.h +++ b/include/hw/s390x/ap-bridge.h @@ -16,4 +16,21 @@ =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; + +int ap_chsc_sei_nt0_get_event(void *res); + +int ap_chsc_sei_nt0_have_event(void); + #endif --=20 2.39.5 (Apple Git-154) From nobody Sun Apr 6 22:20:49 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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charset="utf-8" Handle interception of the CHSC SEI instruction for requests indicating the guest's AP configuration has changed. Signed-off-by: Rorie Reyes Reviewed-by: Anthony Krowiak Tested-by: Anthony Krowiak --- target/s390x/ioinst.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/target/s390x/ioinst.c b/target/s390x/ioinst.c index a944f16c25..f061c6db14 100644 --- a/target/s390x/ioinst.c +++ b/target/s390x/ioinst.c @@ -17,6 +17,7 @@ #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, @@ -573,13 +574,19 @@ 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 2.39.5 (Apple Git-154)