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Fri, 24 Jan 2025 20:17:20 +0000 (GMT) From: Matthew Rosato To: joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, gerald.schaefer@linux.ibm.com, schnelle@linux.ibm.com Cc: hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, svens@linux.ibm.com, borntraeger@linux.ibm.com, farman@linux.ibm.com, clegoate@redhat.com, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Subject: [PATCH v3 1/3] s390/pci: check for relaxed translation capability Date: Fri, 24 Jan 2025 15:17:15 -0500 Message-ID: <20250124201717.348736-2-mjrosato@linux.ibm.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250124201717.348736-1-mjrosato@linux.ibm.com> References: <20250124201717.348736-1-mjrosato@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: CRLRaY718Vt_w_MbWhil43XVt7KPIs5W X-Proofpoint-ORIG-GUID: CRLRaY718Vt_w_MbWhil43XVt7KPIs5W X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-01-24_08,2025-01-23_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 phishscore=0 mlxlogscore=789 priorityscore=1501 impostorscore=0 bulkscore=0 lowpriorityscore=0 malwarescore=0 mlxscore=0 suspectscore=0 spamscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2501240137 For each zdev, record whether or not CLP indicates relaxed translation capability for the associated device group. Signed-off-by: Matthew Rosato --- arch/s390/include/asm/pci.h | 2 +- arch/s390/include/asm/pci_clp.h | 4 +++- arch/s390/pci/pci_clp.c | 1 + 3 files changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h index 474e1f8d1d3c..8fe4c7a72c0b 100644 --- a/arch/s390/include/asm/pci.h +++ b/arch/s390/include/asm/pci.h @@ -144,7 +144,7 @@ struct zpci_dev { u8 util_str_avail : 1; u8 irqs_registered : 1; u8 tid_avail : 1; - u8 reserved : 1; + u8 rtr_avail : 1; /* Relaxed translation allowed */ unsigned int devfn; /* DEVFN part of the RID*/ u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ diff --git a/arch/s390/include/asm/pci_clp.h b/arch/s390/include/asm/pci_clp.h index 3fff2f7095c8..7ebff39c84b3 100644 --- a/arch/s390/include/asm/pci_clp.h +++ b/arch/s390/include/asm/pci_clp.h @@ -156,7 +156,9 @@ struct clp_rsp_query_pci_grp { u16 : 4; u16 noi : 12; /* number of interrupts */ u8 version; - u8 : 6; + u8 : 2; + u8 rtr : 1; /* Relaxed translation requirement */ + u8 : 3; u8 frame : 1; u8 refresh : 1; /* TLB refresh mode */ u16 : 3; diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c index 14bf7e8d06b7..27248686e588 100644 --- a/arch/s390/pci/pci_clp.c +++ b/arch/s390/pci/pci_clp.c @@ -112,6 +112,7 @@ static void clp_store_query_pci_fngrp(struct zpci_dev *zdev, zdev->version = response->version; zdev->maxstbl = response->maxstbl; zdev->dtsm = response->dtsm; + zdev->rtr_avail = response->rtr; switch (response->version) { case 1: -- 2.48.1