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Smith" , Rich Persaud , Ross Philipson , 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.dev, tglx@linutronix.de, 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, Sergii Dmytruk , openxt@googlegroups.com, "Mowka, Mateusz" , Ning Sun , tboot-devel@lists.sourceforge.net Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, Apr 28, 2025 at 7:57=E2=80=AFPM Dave Hansen = wrote: > > On 4/28/25 17:04, Daniel P. Smith wrote: > >> OK, but why do this in Linux as opposed to tboot? Right now, much of t= he > >> TXT magic is done outside of the kernel. Why do it *IN* the kernel? > > > > There was a patch set submitted to tboot to add AMD support. It was > > rejected as tboot is solely focused on Intel TXT implementation. > > > > This meant I either had to go the route of yet another standalone loade= r > > kernel or do it in the kernel. Doing it as an external loader would hav= e > > required a new set of touchpoints, like the one you are highlighting. A= t > > which point, I am sure I would have gotten the question of why I didn't > > do it in the kernel. Will this cause any patent infringement issues in Linux [1]? 1. https://patents.google.com/patent/US9075995B2