linux-kernel - RE: [PATCH v6 08/10] iommufd: Associate fault object with iommufd_hw

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: <BN9PR11MB527606D22055A293CB4401698CFB2@BN9PR11MB5276.namprd11.prod.outlook.com>
Date: Fri, 7 Jun 2024 09:30:28 +0000
From: "Tian, Kevin" <kevin.tian@...el.com>
To: Lu Baolu <baolu.lu@...ux.intel.com>, Jason Gunthorpe <jgg@...pe.ca>,
	"Joerg Roedel" <joro@...tes.org>, Will Deacon <will@...nel.org>, Robin Murphy
	<robin.murphy@....com>, Jean-Philippe Brucker <jean-philippe@...aro.org>,
	Nicolin Chen <nicolinc@...dia.com>, "Liu, Yi L" <yi.l.liu@...el.com>, "Jacob
 Pan" <jacob.jun.pan@...ux.intel.com>, Joel Granados <j.granados@...sung.com>
CC: "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
	"virtualization@...ts.linux-foundation.org"
	<virtualization@...ts.linux-foundation.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v6 08/10] iommufd: Associate fault object with
 iommufd_hw_pgtable

> From: Lu Baolu <baolu.lu@...ux.intel.com>
> Sent: Monday, May 27, 2024 12:05 PM
> 
> When allocating a user iommufd_hw_pagetable, the user space is allowed to
> associate a fault object with the hw_pagetable by specifying the fault
> object ID in the page table allocation data and setting the
> IOMMU_HWPT_FAULT_ID_VALID flag bit.
> 
> On a successful return of hwpt allocation, the user can retrieve and
> respond to page faults by reading and writing the file interface of the
> fault object.
> 
> Once a fault object has been associated with a hwpt, the hwpt is
> iopf-capable, indicated by hwpt->fault is non NULL. Attaching,
> detaching, or replacing an iopf-capable hwpt to an RID or PASID will
> differ from those that are not iopf-capable.
> 
> Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>

Reviewed-by: Kevin Tian <kevin.tian@...el.com>