linux-kernel - RE: [PATCH v4 7/7] iommufd/selftest: Add coverage for vdevice tombstone

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Message-ID: <BN9PR11MB52764B86489423F69AF617B88C48A@BN9PR11MB5276.namprd11.prod.outlook.com>
Date: Thu, 10 Jul 2025 08:10:34 +0000
From: "Tian, Kevin" <kevin.tian@...el.com>
To: Xu Yilun <yilun.xu@...ux.intel.com>, "jgg@...dia.com" <jgg@...dia.com>,
	"jgg@...pe.ca" <jgg@...pe.ca>, "will@...nel.org" <will@...nel.org>,
	"aneesh.kumar@...nel.org" <aneesh.kumar@...nel.org>
CC: "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"joro@...tes.org" <joro@...tes.org>, "robin.murphy@....com"
	<robin.murphy@....com>, "shuah@...nel.org" <shuah@...nel.org>,
	"nicolinc@...dia.com" <nicolinc@...dia.com>, "aik@....com" <aik@....com>,
	"Williams, Dan J" <dan.j.williams@...el.com>, "baolu.lu@...ux.intel.com"
	<baolu.lu@...ux.intel.com>, "Xu, Yilun" <yilun.xu@...el.com>
Subject: RE: [PATCH v4 7/7] iommufd/selftest: Add coverage for vdevice
 tombstone

> From: Xu Yilun <yilun.xu@...ux.intel.com>
> Sent: Wednesday, July 9, 2025 12:03 PM
> 
> This tests the flow to tombstone vdevice when idevice is to be unbound
> before vdevice destruction. The expected result is:
> 
>  - idevice unbinding tombstones vdevice ID, the ID can't be repurposed
>    anymore.
>  - Even ioctl(IOMMU_DESTROY) can't free the tombstoned ID.
>  - iommufd_fops_release() can still free everything.

but the test only checks 2) instead of all?