From: Nicolin Chen <nicolinc@nvidia.com>
To: Xu Yilun <yilun.xu@linux.intel.com>
Cc: <jgg@nvidia.com>, <jgg@ziepe.ca>, <kevin.tian@intel.com>,
<will@kernel.org>, <aneesh.kumar@kernel.org>,
<iommu@lists.linux.dev>, <linux-kernel@vger.kernel.org>,
<joro@8bytes.org>, <robin.murphy@arm.com>, <shuah@kernel.org>,
<aik@amd.com>, <dan.j.williams@intel.com>,
<baolu.lu@linux.intel.com>, <yilun.xu@intel.com>
Subject: Re: [PATCH v3 1/5] iommufd: Add iommufd_object_tombstone_user() helper
Date: Mon, 30 Jun 2025 12:50:57 -0700 [thread overview]
Message-ID: <aGLqoSTOfppG1MbB@Asurada-Nvidia> (raw)
In-Reply-To: <20250627033809.1730752-2-yilun.xu@linux.intel.com>
On Fri, Jun 27, 2025 at 11:38:05AM +0800, Xu Yilun wrote:
> Add the iommufd_object_tombstone_user() helper, which allows the caller
> to destroy an iommufd object created by userspace.
Should we describe it "partially destroy"?
> This is useful on some destroy paths when the kernel caller finds the
> object should have been removed by userspace but is still alive. With
> this helper, the caller destroys the object but leave the object ID
> reserved (so called tombstone). The tombstone prevents repurposing the
> object ID without awareness of the original user.
>
> Since this happens for abnomal userspace behavior, for simplicity, the
s/abnomal/abnormal
Nicolin
next prev parent reply other threads:[~2025-06-30 19:51 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-27 3:38 [PATCH v3 0/5] iommufd: Destroy vdevice on device unbind Xu Yilun
2025-06-27 3:38 ` [PATCH v3 1/5] iommufd: Add iommufd_object_tombstone_user() helper Xu Yilun
2025-06-30 3:08 ` Baolu Lu
2025-06-30 7:24 ` Xu Yilun
2025-06-30 5:52 ` Tian, Kevin
2025-06-30 6:41 ` Xu Yilun
2025-06-30 19:50 ` Nicolin Chen [this message]
2025-07-08 8:45 ` Xu Yilun
2025-06-27 3:38 ` [PATCH v3 2/5] iommufd: Destroy vdevice on idevice destroy Xu Yilun
2025-06-30 5:08 ` Baolu Lu
2025-07-08 8:34 ` Xu Yilun
2025-06-30 6:27 ` Tian, Kevin
2025-06-30 10:18 ` Xu Yilun
2025-06-30 14:50 ` Jason Gunthorpe
2025-07-01 9:19 ` Xu Yilun
2025-07-01 12:13 ` Jason Gunthorpe
2025-07-02 2:23 ` Xu Yilun
2025-07-02 9:13 ` Tian, Kevin
2025-07-02 12:40 ` Jason Gunthorpe
2025-07-03 4:32 ` Tian, Kevin
2025-07-03 11:21 ` Jason Gunthorpe
2025-07-07 10:58 ` Xu Yilun
2025-07-07 12:25 ` Jason Gunthorpe
2025-07-07 19:41 ` Xu Yilun
2025-06-30 19:34 ` Nicolin Chen
2025-07-08 8:12 ` Xu Yilun
2025-06-27 3:38 ` [PATCH v3 3/5] iommufd/vdevice: Remove struct device reference from struct vdevice Xu Yilun
2025-06-30 5:11 ` Baolu Lu
2025-07-04 15:06 ` Jason Gunthorpe
2025-06-27 3:38 ` [PATCH v3 4/5] iommufd/selftest: Explicitly skip tests for inapplicable variant Xu Yilun
2025-07-04 15:07 ` Jason Gunthorpe
2025-06-27 3:38 ` [PATCH v3 5/5] iommufd/selftest: Add coverage for vdevice tombstone Xu Yilun
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