linux-kernel - [PATCH v7 06/13] iommufd: Add alloc_domain_nested op to iommufd_viommu

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <2dcdb5e405dc0deb68230564530d989d285d959c.1730836219.git.nicolinc@nvidia.com>
Date: Tue, 5 Nov 2024 12:04:22 -0800
From: Nicolin Chen <nicolinc@...dia.com>
To: <jgg@...dia.com>, <kevin.tian@...el.com>, <corbet@....net>
CC: <joro@...tes.org>, <suravee.suthikulpanit@....com>, <will@...nel.org>,
	<robin.murphy@....com>, <dwmw2@...radead.org>, <shuah@...nel.org>,
	<iommu@...ts.linux.dev>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-kselftest@...r.kernel.org>,
	<baolu.lu@...ux.intel.com>, <eric.auger@...hat.com>,
	<jean-philippe@...aro.org>, <mdf@...nel.org>, <mshavit@...gle.com>,
	<shameerali.kolothum.thodi@...wei.com>, <smostafa@...gle.com>,
	<yi.l.liu@...el.com>, <aik@....com>, <zhangfei.gao@...aro.org>,
	<patches@...ts.linux.dev>
Subject: [PATCH v7 06/13] iommufd: Add alloc_domain_nested op to iommufd_viommu_ops

Allow IOMMU driver to use a vIOMMU object that holds a nesting parent
hwpt/domain to allocate a nested domain.

Suggested-by: Jason Gunthorpe <jgg@...dia.com>
Reviewed-by: Kevin Tian <kevin.tian@...el.com>
Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
---
 include/linux/iommufd.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h
index 4fc2ce332f10..de9b56265c9c 100644
--- a/include/linux/iommufd.h
+++ b/include/linux/iommufd.h
@@ -14,6 +14,7 @@
 struct device;
 struct file;
 struct iommu_group;
+struct iommu_user_data;
 struct iommufd_access;
 struct iommufd_ctx;
 struct iommufd_device;
@@ -95,9 +96,17 @@ struct iommufd_viommu {
  * struct iommufd_viommu_ops - vIOMMU specific operations
  * @destroy: Clean up all driver-specific parts of an iommufd_viommu. The memory
  *           of the vIOMMU will be free-ed by iommufd core after calling this op
+ * @alloc_domain_nested: Allocate a IOMMU_DOMAIN_NESTED on a vIOMMU that holds a
+ *                       nesting parent domain (IOMMU_DOMAIN_PAGING). @user_data
+ *                       must be defined in include/uapi/linux/iommufd.h.
+ *                       It must fully initialize the new iommu_domain before
+ *                       returning. Upon failure, ERR_PTR must be returned.
  */
 struct iommufd_viommu_ops {
 	void (*destroy)(struct iommufd_viommu *viommu);
+	struct iommu_domain *(*alloc_domain_nested)(
+		struct iommufd_viommu *viommu, u32 flags,
+		const struct iommu_user_data *user_data);
 };
 
 #if IS_ENABLED(CONFIG_IOMMUFD)
-- 
2.43.0