linux-kernel - Re: [PATCH v5 3/4] tpm: add SNP SVSM vTPM driver

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Message-ID: <02190762dd82104070ff1a2942a7be703f4ff53d.camel@HansenPartnership.com>
Date: Mon, 31 Mar 2025 17:26:35 -0400
From: James Bottomley <James.Bottomley@...senPartnership.com>
To: Dionna Amalie Glaze <dionnaglaze@...gle.com>, Jarkko Sakkinen
	 <jarkko@...nel.org>
Cc: Stefano Garzarella <sgarzare@...hat.com>, linux-kernel@...r.kernel.org, 
 Jason Gunthorpe <jgg@...pe.ca>, Dave Hansen <dave.hansen@...ux.intel.com>,
 Borislav Petkov <bp@...en8.de>, linux-integrity@...r.kernel.org, Peter
 Huewe <peterhuewe@....de>,  Ingo Molnar <mingo@...hat.com>,
 linux-coco@...ts.linux.dev, Dov Murik <dovmurik@...ux.ibm.com>, Thomas
 Gleixner <tglx@...utronix.de>, Joerg Roedel <jroedel@...e.de>,
 x86@...nel.org, Tom Lendacky <thomas.lendacky@....com>, Claudio Carvalho
 <cclaudio@...ux.ibm.com>, "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH v5 3/4] tpm: add SNP SVSM vTPM driver

On Mon, 2025-03-31 at 13:56 -0700, Dionna Amalie Glaze wrote:
[...]
> I might be unclear on how I should be testing this, but I do see
> /dev/tpm0 and /dev/tpmrm0 when I build with CONFIG_TCG_SVSM=y, but I
> don't see the event log in securityfs. What am I missing?

The vtpm driver for EDK2/OVMF I suspect ... without that the UEFI won't
lay down and event log for the kernel to pick up.

Regards,

James