linux-kernel - Re: [RFC 0/2] arm-smmu-v3 tlbi-on-map option

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: <fd71a432-0799-3c07-4071-c79bce20a561@arm.com>
Date:   Thu, 13 Jul 2017 10:29:42 +0100
From:   Jean-Philippe Brucker <jean-philippe.brucker@....com>
To:     "Michael S. Tsirkin" <mst@...hat.com>,
        Will Deacon <will.deacon@....com>
Cc:     Eric Auger <eric.auger@...hat.com>, eric.auger.pro@...il.com,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        robin.murphy@....com, christoffer.dall@...aro.org,
        Marc.Zyngier@....com, alex.williamson@...hat.com, peterx@...hat.com
Subject: Re: [RFC 0/2] arm-smmu-v3 tlbi-on-map option

On 12/07/17 23:07, Michael S. Tsirkin wrote:
[...]
> I think using hardware support for nesting is the right final
> solution. It will take some time though. Given this, what should
> we do meanwhile?
> 
> Assuming that's the final destination, a simple quirk like this
> seems to be preferable to virtio-iommu which we'll never be
> able to offload to hardware.

That's not entirely true. virtio-iommu will have an extension for hardware
nesting support. It was presented in my initial proposal, and I've made
significant progress since then.

Thanks,
Jean