linux-kernel - Re: [PATCH v11 00/20] x86: Trenchboot secure dynamic launch Linux kernel support

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Message-ID: <87wmhoulb9.ffs@tglx>
Date: Thu, 31 Oct 2024 20:25:14 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: Ross Philipson <ross.philipson@...cle.com>,
 linux-kernel@...r.kernel.org, x86@...nel.org,
 linux-integrity@...r.kernel.org, linux-doc@...r.kernel.org,
 linux-crypto@...r.kernel.org, kexec@...ts.infradead.org,
 linux-efi@...r.kernel.org, iommu@...ts.linux-foundation.org
Cc: ross.philipson@...cle.com, dpsmith@...rtussolutions.com,
 mingo@...hat.com, bp@...en8.de, hpa@...or.com,
 dave.hansen@...ux.intel.com, ardb@...nel.org, mjg59@...f.ucam.org,
 James.Bottomley@...senpartnership.com, peterhuewe@....de,
 jarkko@...nel.org, jgg@...pe.ca, luto@...capital.net,
 nivedita@...m.mit.edu, herbert@...dor.apana.org.au, davem@...emloft.net,
 corbet@....net, ebiederm@...ssion.com, dwmw2@...radead.org,
 baolu.lu@...ux.intel.com, kanth.ghatraju@...cle.com,
 andrew.cooper3@...rix.com, trenchboot-devel@...glegroups.com
Subject: Re: [PATCH v11 00/20] x86: Trenchboot secure dynamic launch Linux
 kernel support

On Fri, Sep 13 2024 at 13:04, Ross Philipson wrote:
> The larger focus of the TrenchBoot project (https://github.com/TrenchBoot) is to
> enhance the boot security and integrity in a unified manner. The first area of
> focus has been on the Trusted Computing Group's Dynamic Launch for establishing
> a hardware Root of Trust for Measurement, also know as DRTM (Dynamic Root of
> Trust for Measurement). The project has been and continues to work on providing
> a unified means to Dynamic Launch that is a cross-platform (Intel and AMD) and
> cross-architecture (x86 and Arm), with our recent involvment in the upcoming
> Arm DRTM specification. The order of introducing DRTM to the Linux kernel
> follows the maturity of DRTM in the architectures. Intel's Trusted eXecution
> Technology (TXT) is present today and only requires a preamble loader, e.g. a
> boot loader, and an OS kernel that is TXT-aware. AMD DRTM implementation has
> been present since the introduction of AMD-V but requires an additional
> component that is AMD specific and referred to in the specification as the
> Secure Loader, which the TrenchBoot project has an active prototype in
> development. Finally Arm's implementation is in specification development stage
> and the project is looking to support it when it becomes available.
>
> This patchset provides detailed documentation of DRTM, the approach used for
> adding the capbility, and relevant API/ABI documentation. In addition to the
> documentation the patch set introduces Intel TXT support as the first platform
> for Linux Secure Launch.

So this looks pretty reasonable to me by now and I'm inclined to take it
through the tip x86 tree, but that needs reviewed/acked-by's from the
crypto and TPM folks. EFI has been reviewed already.

Can we make progress on this please?

Thanks,

        tglx