linux-kernel - RE: [PATCH 1/5] iommu: Add mm_get

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 for Android: free password hash cracker in your pocket

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

Date:   Wed, 9 Aug 2023 09:47:15 +0000
From:   "Tian, Kevin" <kevin.tian@...el.com>
To:     Jason Gunthorpe <jgg@...pe.ca>,
        "Zhang, Tina" <tina.zhang@...el.com>
CC:     Lu Baolu <baolu.lu@...ux.intel.com>,
        Michael Shavit <mshavit@...gle.com>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/5] iommu: Add mm_get_pasid() helper function

> From: Jason Gunthorpe <jgg@...pe.ca>
> Sent: Tuesday, August 8, 2023 11:02 PM
> 
> On Tue, Aug 08, 2023 at 03:49:40PM +0800, Tina Zhang wrote:
> > mm_get_pasid() is for getting mm pasid value.
> >
> > The motivation is to replace mm->pasid with an iommu private data
> > structure that is introduced in a later patch.
> 
> Maybe we should start out by calling it what it actually is:
> 
> 'mm_get_enqcmd_pasid()'
> 
> We can't actually have multiple SVA domains with different PASIDs
> until the places wrongly calling this are removed :\
> 

it's kind of egg-chicken problem. mm_get_pasid() is used by all SVA
scenarios beyond enqcmd then calling it mm_get_enqcmd_pasid()
also sounds weird for non-enqcmd case.

unless you were suggesting to just create a new wrapper for this
specific enqcmd path (try_fixup_enqcmd_gp()) then I'm fine. 😊