linux-kernel - Re: [RFC PATCH v2 0/6] Enlightened vTPM support for SVSM on SEV-SNP

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Message-ID: <20250301003009.GP5011@ziepe.ca>
Date: Fri, 28 Feb 2025 20:30:09 -0400
From: Jason Gunthorpe <jgg@...pe.ca>
To: Stefano Garzarella <sgarzare@...hat.com>
Cc: Jarkko Sakkinen <jarkko@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Claudio Carvalho <cclaudio@...ux.ibm.com>,
	Peter Huewe <peterhuewe@....de>, x86@...nel.org,
	Dov Murik <dovmurik@...ux.ibm.com>, linux-coco@...ts.linux.dev,
	Dionna Glaze <dionnaglaze@...gle.com>,
	James Bottomley <James.Bottomley@...senpartnership.com>,
	Ingo Molnar <mingo@...hat.com>, Joerg Roedel <jroedel@...e.de>,
	linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Tom Lendacky <thomas.lendacky@....com>,
	Borislav Petkov <bp@...en8.de>, "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [RFC PATCH v2 0/6] Enlightened vTPM support for SVSM on SEV-SNP

On Fri, Feb 28, 2025 at 06:07:14PM +0100, Stefano Garzarella wrote:
> I put RFC back in because we haven't yet decided if this is the best
> approach to support SVSM vTPM, but I really like to receive feedbacks
> especially from the maintainer/reviewers of the TPM subsystem, to see if
> this approach is acceptable.

I didn't look in high detail, but the overall shape is what I was
thinking about in our previous conversations. Very little TPM code is
under arch/, we have a nice simplifying helper in the core code, and
you have a tidy platform device to tie it all together.

Jason