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

From: Thomas Gleixner <tglx@linutronix.de>
To: Ross Philipson <ross.philipson@oracle.com>,
	linux-kernel@vger.kernel.org, x86@kernel.org,
	linux-integrity@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-crypto@vger.kernel.org, kexec@lists.infradead.org,
	linux-efi@vger.kernel.org, iommu@lists.linux-foundation.org
Cc: ross.philipson@oracle.com, dpsmith@apertussolutions.com,
	mingo@redhat.com, bp@alien8.de, hpa@zytor.com,
	dave.hansen@linux.intel.com, ardb@kernel.org,
	mjg59@srcf.ucam.org, James.Bottomley@hansenpartnership.com,
	peterhuewe@gmx.de, jarkko@kernel.org, jgg@ziepe.ca,
	luto@amacapital.net, nivedita@alum.mit.edu,
	herbert@gondor.apana.org.au, davem@davemloft.net, corbet@lwn.net,
	ebiederm@xmission.com, dwmw2@infradead.org,
	baolu.lu@linux.intel.com, kanth.ghatraju@oracle.com,
	andrew.cooper3@citrix.com, trenchboot-devel@googlegroups.com
Subject: Re: [PATCH v11 00/20] x86: Trenchboot secure dynamic launch Linux kernel support
Date: Thu, 31 Oct 2024 20:25:14 +0100	[thread overview]
Message-ID: <87wmhoulb9.ffs@tglx> (raw)
In-Reply-To: <20240913200517.3085794-1-ross.philipson@oracle.com>

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

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