Re: [PATCH 0/3] Apple M1 DART IOMMU driver
From: Mark Kettenis <hidden>
Date: 2021-03-26 21:14:42
Also in:
linux-devicetree, linux-iommu, lkml
From: Arnd Bergmann <arnd@kernel.org> Date: Fri, 26 Mar 2021 21:03:32 +0100 On Fri, Mar 26, 2021 at 6:28 PM Mark Kettenis [off-list ref] wrote:quoted
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.
No kidding! I was surprised to see the bypass support on the Thunderbolt-related nodes. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel