From: Arnd Bergmann <arnd@kernel.org>
To: Mark Kettenis <mark.kettenis@xs4all.nl>
Cc: sven@svenpeter.dev, Rob Herring <robh@kernel.org>,
"open list:IOMMU DRIVERS" <iommu@lists.linux-foundation.org>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Hector Martin <marcan@marcan.st>, Marc Zyngier <maz@kernel.org>,
Mohamed Mediouni <mohamed.mediouni@caramail.com>,
Stan Skowronek <stan@corellium.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
DTML <devicetree@vger.kernel.org>
Subject: Re: [PATCH 0/3] Apple M1 DART IOMMU driver
Date: Fri, 26 Mar 2021 21:03:32 +0100 [thread overview]
Message-ID: <CAK8P3a1CFHgjuzmefKcbC3MPeBD0USeTe7oZsTcQ=6tagG3Cvw@mail.gmail.com> (raw)
In-Reply-To: <c1bcd9821a8f8c05@bloch.sibelius.xs4all.nl>
On Fri, Mar 26, 2021 at 6:28 PM Mark Kettenis <mark.kettenis@xs4all.nl> wrote:
> I haven't figured out how the bypass stuff really works. Corellium
> added support for it in their codebase when they added support for
> Thunderbolt, and some of the DARTs that seem to be related to
> Thunderbolt do indeed have a "bypass" property. But it is unclear to
> me how the different puzzle pieces fit together for Thunderbolt.
As a general observation, bypass mode for Thunderbolt is what enabled
the http://thunderclap.io/ attack. This is extremely useful for debugging
a running kernel from another machine, but it's also something that
should never be done in a production kernel.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@kernel.org>
To: Mark Kettenis <mark.kettenis@xs4all.nl>
Cc: Rob Herring <robh@kernel.org>,
sven@svenpeter.dev, DTML <devicetree@vger.kernel.org>,
Will Deacon <will@kernel.org>, Hector Martin <marcan@marcan.st>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"open list:IOMMU DRIVERS" <iommu@lists.linux-foundation.org>,
Marc Zyngier <maz@kernel.org>,
Mohamed Mediouni <mohamed.mediouni@caramail.com>,
Robin Murphy <robin.murphy@arm.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Stan Skowronek <stan@corellium.com>
Subject: Re: [PATCH 0/3] Apple M1 DART IOMMU driver
Date: Fri, 26 Mar 2021 21:03:32 +0100 [thread overview]
Message-ID: <CAK8P3a1CFHgjuzmefKcbC3MPeBD0USeTe7oZsTcQ=6tagG3Cvw@mail.gmail.com> (raw)
In-Reply-To: <c1bcd9821a8f8c05@bloch.sibelius.xs4all.nl>
On Fri, Mar 26, 2021 at 6:28 PM Mark Kettenis <mark.kettenis@xs4all.nl> wrote:
> I haven't figured out how the bypass stuff really works. Corellium
> added support for it in their codebase when they added support for
> Thunderbolt, and some of the DARTs that seem to be related to
> Thunderbolt do indeed have a "bypass" property. But it is unclear to
> me how the different puzzle pieces fit together for Thunderbolt.
As a general observation, bypass mode for Thunderbolt is what enabled
the http://thunderclap.io/ attack. This is extremely useful for debugging
a running kernel from another machine, but it's also something that
should never be done in a production kernel.
Arnd
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@kernel.org>
To: Mark Kettenis <mark.kettenis@xs4all.nl>
Cc: sven@svenpeter.dev, Rob Herring <robh@kernel.org>,
"open list:IOMMU DRIVERS" <iommu@lists.linux-foundation.org>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Hector Martin <marcan@marcan.st>, Marc Zyngier <maz@kernel.org>,
Mohamed Mediouni <mohamed.mediouni@caramail.com>,
Stan Skowronek <stan@corellium.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
DTML <devicetree@vger.kernel.org>
Subject: Re: [PATCH 0/3] Apple M1 DART IOMMU driver
Date: Fri, 26 Mar 2021 21:03:32 +0100 [thread overview]
Message-ID: <CAK8P3a1CFHgjuzmefKcbC3MPeBD0USeTe7oZsTcQ=6tagG3Cvw@mail.gmail.com> (raw)
In-Reply-To: <c1bcd9821a8f8c05@bloch.sibelius.xs4all.nl>
On Fri, Mar 26, 2021 at 6:28 PM Mark Kettenis <mark.kettenis@xs4all.nl> wrote:
> I haven't figured out how the bypass stuff really works. Corellium
> added support for it in their codebase when they added support for
> Thunderbolt, and some of the DARTs that seem to be related to
> Thunderbolt do indeed have a "bypass" property. But it is unclear to
> me how the different puzzle pieces fit together for Thunderbolt.
As a general observation, bypass mode for Thunderbolt is what enabled
the http://thunderclap.io/ attack. This is extremely useful for debugging
a running kernel from another machine, but it's also something that
should never be done in a production kernel.
Arnd
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-03-26 20:04 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-20 15:19 [PATCH 0/3] Apple M1 DART IOMMU driver Sven Peter
2021-03-20 15:19 ` Sven Peter
2021-03-20 15:19 ` Sven Peter via iommu
2021-03-20 15:19 ` [PATCH 1/3] iommu: io-pgtable: add DART pagetable format Sven Peter
2021-03-20 15:19 ` Sven Peter
2021-03-20 15:19 ` Sven Peter via iommu
2021-03-24 16:37 ` Robin Murphy
2021-03-24 16:37 ` Robin Murphy
2021-03-24 16:37 ` Robin Murphy
2021-03-25 20:47 ` Sven Peter
2021-03-25 20:47 ` Sven Peter
2021-03-25 20:47 ` Sven Peter via iommu
2021-03-20 15:20 ` [PATCH 2/3] dt-bindings: iommu: add DART iommu bindings Sven Peter
2021-03-20 15:20 ` Sven Peter
2021-03-20 15:20 ` Sven Peter via iommu
2021-03-22 0:15 ` Rob Herring
2021-03-22 0:15 ` Rob Herring
2021-03-22 0:15 ` Rob Herring
2021-03-22 18:16 ` Sven Peter
2021-03-22 18:16 ` Sven Peter
2021-03-22 18:16 ` Sven Peter via iommu
2021-03-21 16:00 ` [PATCH 0/3] Apple M1 DART IOMMU driver Mark Kettenis
2021-03-21 16:00 ` Mark Kettenis
2021-03-21 16:00 ` Mark Kettenis
2021-03-21 17:22 ` Sven Peter via iommu
2021-03-21 18:35 ` Mark Kettenis
2021-03-21 18:35 ` Mark Kettenis
2021-03-21 18:35 ` Mark Kettenis
2021-03-22 22:17 ` Sven Peter
2021-03-22 22:17 ` Sven Peter
2021-03-22 22:17 ` Sven Peter via iommu
2021-03-23 20:00 ` Mark Kettenis
2021-03-23 20:00 ` Mark Kettenis
2021-03-23 20:00 ` Mark Kettenis
2021-03-23 21:03 ` Sven Peter
2021-03-23 21:03 ` Sven Peter
2021-03-23 21:03 ` Sven Peter via iommu
2021-03-21 17:28 ` Sven Peter
2021-03-21 17:28 ` Sven Peter
2021-03-21 17:28 ` Sven Peter via iommu
2021-03-23 20:53 ` Rob Herring
2021-03-23 20:53 ` Rob Herring
2021-03-23 20:53 ` Rob Herring
2021-03-23 22:33 ` Mark Kettenis
2021-03-23 22:33 ` Mark Kettenis
2021-03-23 22:33 ` Mark Kettenis
2021-03-25 7:53 ` Sven Peter
2021-03-25 7:53 ` Sven Peter
2021-03-25 7:53 ` Sven Peter via iommu
2021-03-25 11:50 ` Robin Murphy
2021-03-25 11:50 ` Robin Murphy
2021-03-25 11:50 ` Robin Murphy
2021-03-25 20:49 ` Sven Peter
2021-03-25 20:49 ` Sven Peter
2021-03-25 20:49 ` Sven Peter via iommu
2021-03-27 15:33 ` Sven Peter
2021-03-27 15:33 ` Sven Peter
2021-03-27 15:33 ` Sven Peter via iommu
2021-03-25 21:41 ` Arnd Bergmann
2021-03-25 21:41 ` Arnd Bergmann
2021-03-25 21:41 ` Arnd Bergmann
2021-03-26 15:59 ` Mark Kettenis
2021-03-26 15:59 ` Mark Kettenis
2021-03-26 15:59 ` Mark Kettenis
2021-03-26 16:09 ` Arnd Bergmann
2021-03-26 16:09 ` Arnd Bergmann
2021-03-26 16:09 ` Arnd Bergmann
2021-03-26 16:10 ` Sven Peter
2021-03-26 16:10 ` Sven Peter
2021-03-26 16:10 ` Sven Peter via iommu
2021-03-26 16:38 ` Arnd Bergmann
2021-03-26 16:38 ` Arnd Bergmann
2021-03-26 16:38 ` Arnd Bergmann
2021-03-26 17:06 ` Sven Peter
2021-03-26 17:06 ` Sven Peter
2021-03-26 17:06 ` Sven Peter via iommu
2021-03-26 17:26 ` Mark Kettenis
2021-03-26 17:26 ` Mark Kettenis
2021-03-26 17:26 ` Mark Kettenis
2021-03-26 17:34 ` Robin Murphy
2021-03-26 17:34 ` Robin Murphy
2021-03-26 17:34 ` Robin Murphy
2021-03-26 17:51 ` Sven Peter
2021-03-26 17:51 ` Sven Peter
2021-03-26 17:51 ` Sven Peter via iommu
2021-03-26 19:59 ` Arnd Bergmann
2021-03-26 19:59 ` Arnd Bergmann
2021-03-26 19:59 ` Arnd Bergmann
2021-03-26 21:16 ` Mark Kettenis
2021-03-26 21:16 ` Mark Kettenis
2021-03-26 21:16 ` Mark Kettenis
2021-03-27 15:30 ` Sven Peter
2021-03-27 15:30 ` Sven Peter
2021-03-27 15:30 ` Sven Peter via iommu
2021-03-26 20:03 ` Arnd Bergmann [this message]
2021-03-26 20:03 ` Arnd Bergmann
2021-03-26 20:03 ` Arnd Bergmann
2021-03-26 21:13 ` Mark Kettenis
2021-03-26 21:13 ` Mark Kettenis
2021-03-26 21:13 ` Mark Kettenis
2021-03-24 15:29 ` Robin Murphy
2021-03-24 15:29 ` Robin Murphy
2021-03-24 15:29 ` Robin Murphy
2021-03-25 7:58 ` Sven Peter
2021-03-25 7:58 ` Sven Peter
2021-03-25 7:58 ` Sven Peter via iommu
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