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Tue, 4 Aug 2026 02:44:54 +0000 (GMT) Received: from smtpav04.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 59FC858054; Tue, 4 Aug 2026 02:44:54 +0000 (GMT) Received: from WIN-DU0DFC9G5VV.ibm.com (unknown [9.61.249.58]) by smtpav04.wdc07v.mail.ibm.com (Postfix) with ESMTP; Tue, 4 Aug 2026 02:44:54 +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=lEAn81Vx11ujd3Atn Xqw6EQnE/DGmSSO8tdJO7sk+9A=; b=XekFzLYfzmpRc1Ut/blp+fQxBB6nsT+eA nt3rjR0ZBj0gNJ0FsocHlYE2gdBWvlr4qKnxmoX4l9TN0xhTopZrmjo36SiBih9B nNiMtRz4oWRH+vMJR9AOpl0PWh0Tc/qIYKJfsUn42NIVSn3PxA0K9hKk21p0134o OkRhUuBDwW5THNZWGH91YG9AQtn+Byq64Vi0iYI2BQMEGPyVgWpcb5g4msUVTYl1 sTS6KcnroMAgVHlwK3OFkoJdsOjJqCFPjCADX0T7//jJa5XKQmQtFnAUbu0zKPug Zih0fscND0wWCaRxn7KRg7UKHYXEi0DVF6j0JO8Pr//Y6Irgc0vPg== From: Konstantin Shkolnyy To: mjrosato@linux.ibm.com Cc: alifm@linux.ibm.com, farman@linux.ibm.com, richard.henderson@linaro.org, iii@linux.ibm.com, david@kernel.org, cohuck@redhat.com, pasic@linux.ibm.com, borntraeger@linux.ibm.com, qemu-s390x@nongnu.org, qemu-devel@nongnu.org, Konstantin Shkolnyy Subject: [PATCH v5 08/15] s390x/pci: Move dma_limit from S390PCIIOMMU to S390PCIBusDevice Date: Mon, 3 Aug 2026 21:44:36 -0500 Message-Id: <20260804024443.56445-9-kshk@linux.ibm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260804024443.56445-1-kshk@linux.ibm.com> References: <20260804024443.56445-1-kshk@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 8k9E99m-5mWY5vtgTp2zlp9QOTN75bLM X-Proofpoint-Spam-Info: AW1haW4tMjYwODA0MDAxNiBTYWx0ZWRfX3XtvxG03GaEO 1KP//oiIiDK7q7yeb5v2XkBFmP4cWrEMlBB0/pjDN1grN8MA1i5gu1nzavXkBuK6PM0RKU6e5/W 0UQ3IsMwG7wrPNMD9WFglHfGEnyeHOE= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODA0MDAxNiBTYWx0ZWRfX84gCFEmOCNcR 72GD3A5fA+qaDqI8rUhrAVXv5FHv+pmyvXh2FoEd2eK1vBITJ8sOaQrdKfO83zHmzcE0cqt9i4m wkyE9rf59+LpbwbN6zJ475AG6W6vfqqltQK0lgeEIZPqOmPtREjJNoD4/AWQo0n3XcBDEu6ZI4U nAH9pMIuKigBVcVBjBoZEGQhNeIjvZAxccA0oYj1+jxwuhcHz4dcPPoOfiClSWvrHCh+Eucrkd0 lrLL1HP7Jx0n6TMz5MRGwQma+9wox7r9jf39ePc50rSiY0N9bnrGQyBpM9+ItZCmtGUBbvCfHsg AHvffbouoW4bMvw//nJSTq5Lulhl6XMdpk0nfstKEIomvtzwQQldFNE/y36G62lFp+8M3pWF/+j GsCH2Sv3yG6ZF3NI/LcKAQ1Cwd7zdcZxvXT9A1SzVZhEloSxYNI0aCpVD5QggvKuXsSfIBKRg93 pH/2xXdNVV05jCt988g== X-Proofpoint-GUID: 8k9E99m-5mWY5vtgTp2zlp9QOTN75bLM X-Authority-Analysis: v=2.4 cv=KfzidwYD c=1 sm=1 tr=0 ts=6a715229 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=NXusJeJlOfVlo0NZOjUA:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-04_01,2026-08-03_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 impostorscore=0 suspectscore=0 malwarescore=0 adultscore=0 clxscore=1015 priorityscore=1501 phishscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608040016 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=lists1p.gnu.org; Received-SPF: pass client-ip=148.163.158.5; envelope-from=kshk@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_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, 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: qemu development 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: 1785811586724158500 Content-Type: text/plain; charset="utf-8" This field is only used when S390PCIBusDevice exists, so it can be moved there to simplify S390PCIIOMMU which purpose is just to store the "root" AddressSpace. Signed-off-by: Konstantin Shkolnyy --- hw/s390x/s390-pci-bus.c | 10 +++++----- hw/s390x/s390-pci-inst.c | 23 +++++++++++------------ include/hw/s390x/s390-pci-bus.h | 2 +- 3 files changed, 17 insertions(+), 18 deletions(-) diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c index 586dafe1e5..04bb0271e6 100644 --- a/hw/s390x/s390-pci-bus.c +++ b/hw/s390x/s390-pci-bus.c @@ -610,8 +610,8 @@ static void s390_pci_ioat_replay(S390PCIBusDevice *pbde= v) return; } =20 - if (iommu->dma_limit) { - dma_avail =3D iommu->dma_limit->avail; + if (pbdev->dma_limit) { + dma_avail =3D pbdev->dma_limit->avail; } else { dma_avail =3D 1; } @@ -1223,7 +1223,7 @@ static void s390_pcihost_plug(HotplugHandler *hotplug= _dev, DeviceState *dev, pbdev->forwarding_assist =3D false; } } - pbdev->iommu->dma_limit =3D s390_pci_start_dma_count(s, pbdev); + pbdev->dma_limit =3D s390_pci_start_dma_count(s, pbdev); /* Fill in CLP information passed via the vfio region */ s390_pci_get_clp_info(pbdev); if (!pbdev->interp) { @@ -1301,8 +1301,8 @@ static void s390_pcihost_unplug(HotplugHandler *hotpl= ug_dev, DeviceState *dev, pbdev->fid =3D 0; QTAILQ_REMOVE(&s->zpci_devs, pbdev, link); g_hash_table_remove(s->zpci_table, &pbdev->idx); - if (pbdev->iommu && pbdev->iommu->dma_limit) { - s390_pci_end_dma_count(s, pbdev->iommu->dma_limit); + if (pbdev->dma_limit) { + s390_pci_end_dma_count(s, pbdev->dma_limit); } g_hash_table_destroy(pbdev->iotlb); qdev_unrealize(dev); diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c index 7081be4619..dc52da41b5 100644 --- a/hw/s390x/s390-pci-inst.c +++ b/hw/s390x/s390-pci-inst.c @@ -28,17 +28,17 @@ =20 #include "trace.h" =20 -static inline void inc_dma_avail(S390PCIIOMMU *iommu) +static inline void inc_dma_avail(S390PCIBusDevice *pbdev) { - if (iommu->dma_limit) { - iommu->dma_limit->avail++; + if (pbdev->dma_limit) { + pbdev->dma_limit->avail++; } } =20 -static inline void dec_dma_avail(S390PCIIOMMU *iommu) +static inline void dec_dma_avail(S390PCIBusDevice *pbdev) { - if (iommu->dma_limit) { - iommu->dma_limit->avail--; + if (pbdev->dma_limit) { + pbdev->dma_limit->avail--; } } =20 @@ -633,7 +633,6 @@ int pcistg_service_call(S390CPU *cpu, uint8_t r1, uint8= _t r2, uintptr_t ra) uint32_t s390_pci_update_iotlb(S390PCIBusDevice *pbdev, S390IOTLBEntry *entry) { - S390PCIIOMMU *iommu =3D pbdev->iommu; S390IOTLBEntry *cache =3D g_hash_table_lookup(pbdev->iotlb, &entry->io= va); IOMMUTLBEvent event =3D { .type =3D entry->perm ? IOMMU_NOTIFIER_MAP : IOMMU_NOTIFIER_UNMAP, @@ -651,7 +650,7 @@ uint32_t s390_pci_update_iotlb(S390PCIBusDevice *pbdev, goto out; } g_hash_table_remove(pbdev->iotlb, &entry->iova); - inc_dma_avail(iommu); + inc_dma_avail(pbdev); /* Don't notify the iommu yet, maybe we can bundle contiguous unma= ps */ goto out; } else { @@ -674,7 +673,7 @@ uint32_t s390_pci_update_iotlb(S390PCIBusDevice *pbdev, cache->len =3D TARGET_PAGE_SIZE; cache->perm =3D entry->perm; g_hash_table_replace(pbdev->iotlb, &cache->iova, cache); - dec_dma_avail(iommu); + dec_dma_avail(pbdev); } =20 /* @@ -684,7 +683,7 @@ uint32_t s390_pci_update_iotlb(S390PCIBusDevice *pbdev, memory_region_notify_iommu(&pbdev->iommu_mr, 0, event); =20 out: - return iommu->dma_limit ? iommu->dma_limit->avail : 1; + return pbdev->dma_limit ? pbdev->dma_limit->avail : 1; } =20 static void s390_pci_batch_unmap(S390PCIBusDevice *pbdev, uint64_t iova, @@ -761,8 +760,8 @@ int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_= t r2, uintptr_t ra) } =20 iommu =3D pbdev->iommu; - if (iommu->dma_limit) { - dma_avail =3D iommu->dma_limit->avail; + if (pbdev->dma_limit) { + dma_avail =3D pbdev->dma_limit->avail; } else { dma_avail =3D 1; } diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bu= s.h index 24f6e60786..126a50c98b 100644 --- a/include/hw/s390x/s390-pci-bus.h +++ b/include/hw/s390x/s390-pci-bus.h @@ -279,7 +279,6 @@ struct S390PCIIOMMU { uint64_t pba; uint64_t pal; uint64_t max_dma_limit; - S390PCIDMACount *dma_limit; }; =20 typedef struct S390PCIIOMMUTable { @@ -353,6 +352,7 @@ struct S390PCIBusDevice { IOMMUMemoryRegion iommu_mr; MemoryRegion *dm_mr; GHashTable *iotlb; + S390PCIDMACount *dma_limit; MemoryRegion msix_notify_mr; IndAddr *summary_ind; IndAddr *indicator; --=20 2.34.1