linux-kernel - Re: [PATCH v3] iommufd/device: Enforce reserved IOVA also when attached to hwpt

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: <20240815173728.GL2032816@nvidia.com>
Date: Thu, 15 Aug 2024 14:37:28 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Nicolin Chen <nicolinc@...dia.com>
Cc: "Tian, Kevin" <kevin.tian@...el.com>, "Liu, Yi L" <yi.l.liu@...el.com>,
	"iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] iommufd/device: Enforce reserved IOVA also when
 attached to hwpt_nested

On Wed, Aug 14, 2024 at 04:31:17PM -0700, Nicolin Chen wrote:
> > Regardless this seems like a bug fix to me that we may as well
> > take. Unless we intend to retire the entire RESV_SW mechanism it
> > should work correctly.
> 
> I am hoping for that, yet can't guarantee of accomplishing it at
> the end of the day.

I think we can't retire it completely. It is necessary to allow DPDK
to work as-is, for instance.

We can only hope to provide an alternative for nesting..

Jason