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Mon, 31 Mar 2025 20:22:01 +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, clg@redhat.com, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Subject: [PATCH v4 1/5] iommu/s390: set appropriate IOTA region type Date: Mon, 31 Mar 2025 16:21:55 -0400 Message-ID: <20250331202159.85956-2-mjrosato@linux.ibm.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250331202159.85956-1-mjrosato@linux.ibm.com> References: <20250331202159.85956-1-mjrosato@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: btU5VDVasQ0i-YqsG1aHgxIczWgjCsfD X-Proofpoint-ORIG-GUID: btU5VDVasQ0i-YqsG1aHgxIczWgjCsfD X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-31_09,2025-03-27_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 phishscore=0 impostorscore=0 priorityscore=1501 mlxscore=0 bulkscore=0 clxscore=1015 lowpriorityscore=0 suspectscore=0 spamscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2503310138 Content-Type: text/plain; charset="utf-8" When registering the I/O Translation Anchor, use the current table type stored in the s390_domain to set the appropriate region type indication. For the moment, the table type will always be stored as region third. Reviewed-by: Niklas Schnelle Signed-off-by: Matthew Rosato --- drivers/iommu/s390-iommu.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c index e1c76e0f9c2b..cad032d4c9a6 100644 --- a/drivers/iommu/s390-iommu.c +++ b/drivers/iommu/s390-iommu.c @@ -31,6 +31,7 @@ struct s390_domain { unsigned long *dma_table; spinlock_t list_lock; struct rcu_head rcu; + u8 origin_type; }; =20 static struct iommu_domain blocking_domain; @@ -345,6 +346,7 @@ static struct iommu_domain *s390_domain_alloc_paging(st= ruct device *dev) s390_domain->domain.geometry.force_aperture =3D true; s390_domain->domain.geometry.aperture_start =3D 0; s390_domain->domain.geometry.aperture_end =3D ZPCI_TABLE_SIZE_RT - 1; + s390_domain->origin_type =3D ZPCI_TABLE_TYPE_RTX; =20 spin_lock_init(&s390_domain->list_lock); INIT_LIST_HEAD_RCU(&s390_domain->devices); @@ -381,6 +383,21 @@ static void zdev_s390_domain_update(struct zpci_dev *z= dev, spin_unlock_irqrestore(&zdev->dom_lock, flags); } =20 +static u64 get_iota_region_flag(struct s390_domain *domain) +{ + switch (domain->origin_type) { + case ZPCI_TABLE_TYPE_RTX: + return ZPCI_IOTA_RTTO_FLAG; + case ZPCI_TABLE_TYPE_RSX: + return ZPCI_IOTA_RSTO_FLAG; + case ZPCI_TABLE_TYPE_RFX: + return ZPCI_IOTA_RFTO_FLAG; + default: + WARN_ONCE(1, "Invalid IOMMU table (%x)\n", domain->origin_type); + return 0; + } +} + static int s390_iommu_domain_reg_ioat(struct zpci_dev *zdev, struct iommu_domain *domain, u8 *status) { @@ -399,7 +416,7 @@ static int s390_iommu_domain_reg_ioat(struct zpci_dev *= zdev, default: s390_domain =3D to_s390_domain(domain); iota =3D virt_to_phys(s390_domain->dma_table) | - ZPCI_IOTA_RTTO_FLAG; + get_iota_region_flag(s390_domain); rc =3D zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma, iota, status); } --=20 2.49.0