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From: Yi Liu <yi.l.liu@intel.com>
To: joro@8bytes.org, alex.williamson@redhat.com, jgg@nvidia.com,
	kevin.tian@intel.com, robin.murphy@arm.com,
	baolu.lu@linux.intel.com
Cc: cohuck@redhat.com, eric.auger@redhat.com, nicolinc@nvidia.com,
	kvm@vger.kernel.org, mjrosato@linux.ibm.com,
	chao.p.peng@linux.intel.com, yi.l.liu@intel.com,
	yi.y.sun@linux.intel.com, peterx@redhat.com, jasowang@redhat.com,
	shameerali.kolothum.thodi@huawei.com, lulu@redhat.com,
	suravee.suthikulpanit@amd.com, iommu@lists.linux.dev,
	linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
	zhenzhong.duan@intel.com, joao.m.martins@oracle.com
Subject: [PATCH v2 4/6] iommufd/hw_pagetable: Support allocating nested parent domain
Date: Thu, 28 Sep 2023 00:15:26 -0700	[thread overview]
Message-ID: <20230928071528.26258-5-yi.l.liu@intel.com> (raw)
In-Reply-To: <20230928071528.26258-1-yi.l.liu@intel.com>

This extends IOMMU_HWPT_ALLOC to allocate domains used as parent (stage-2)
in nested translation.

Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
 drivers/iommu/iommufd/hw_pagetable.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c
index 5be7a31cbd9c..8b3d2875d642 100644
--- a/drivers/iommu/iommufd/hw_pagetable.c
+++ b/drivers/iommu/iommufd/hw_pagetable.c
@@ -83,6 +83,9 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
 
 	lockdep_assert_held(&ioas->mutex);
 
+	if (flags && !ops->domain_alloc_user)
+		return ERR_PTR(-EOPNOTSUPP);
+
 	hwpt = iommufd_object_alloc(ictx, hwpt, IOMMUFD_OBJ_HW_PAGETABLE);
 	if (IS_ERR(hwpt))
 		return hwpt;
@@ -154,7 +157,7 @@ int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd)
 	struct iommufd_ioas *ioas;
 	int rc;
 
-	if (cmd->flags || cmd->__reserved)
+	if ((cmd->flags & (~IOMMU_HWPT_ALLOC_NEST_PARENT)) || cmd->__reserved)
 		return -EOPNOTSUPP;
 
 	idev = iommufd_get_device(ucmd, cmd->dev_id);
-- 
2.34.1


  parent reply	other threads:[~2023-09-28  7:16 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-28  7:15 [PATCH v2 0/6] iommufd support allocating nested parent domain Yi Liu
2023-09-28  7:15 ` [PATCH v2 1/6] iommu: Add new iommu op to create domains owned by userspace Yi Liu
2023-10-09  1:09   ` Tian, Kevin
2023-10-15  7:14   ` Nicolin Chen
2023-10-16 12:04     ` Jason Gunthorpe
2023-10-16 17:46       ` Nicolin Chen
2023-10-17 16:05         ` Jason Gunthorpe
2023-09-28  7:15 ` [PATCH v2 2/6] iommufd/hw_pagetable: Use domain_alloc_user op for domain allocation Yi Liu
     [not found]   ` <00163e5f-1a5a-a5c6-baa1-12b2a97e12b7@intel.com>
2023-10-16 17:48     ` Nicolin Chen
2023-10-17  3:46       ` Liu, Jingqi
2023-09-28  7:15 ` [PATCH v2 3/6] iommufd/hw_pagetable: Accepts user flags " Yi Liu
2023-09-29  3:33   ` Baolu Lu
2023-09-28  7:15 ` Yi Liu [this message]
2023-09-29  3:34   ` [PATCH v2 4/6] iommufd/hw_pagetable: Support allocating nested parent domain Baolu Lu
2023-10-09  1:10   ` Tian, Kevin
2023-09-28  7:15 ` [PATCH v2 5/6] iommufd/selftest: Add domain_alloc_user() support in iommu mock Yi Liu
2023-10-09  1:12   ` Tian, Kevin
2023-09-28  7:15 ` [PATCH v2 6/6] iommu/vt-d: Add domain_alloc_user op Yi Liu
2023-09-29  3:38   ` Baolu Lu
2023-10-09  1:13   ` Tian, Kevin
2023-10-10 16:43   ` Jason Gunthorpe
2023-10-11  3:18     ` Baolu Lu
2023-10-10 16:47 ` [PATCH v2 0/6] iommufd support allocating nested parent domain Jason Gunthorpe
2023-10-12  7:33   ` Yi Liu

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