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Date: Fri, 02 Feb 2024 00:03:49 +0200
Message-Id: <CYU2Z635C7SX.U9BMOKPM1G73@suppilovahvero>
Cc: "Kuppuswamy Sathyanarayanan"
 <sathyanarayanan.kuppuswamy@linux.intel.com>, "Qinkun Bao"
 <qinkun@google.com>, "Yao, Jiewen" <jiewen.yao@intel.com>, "Xing, Cedric"
 <cedric.xing@intel.com>, "Dionna Amalie Glaze" <dionnaglaze@google.com>,
 <biao.lu@intel.com>, <linux-coco@lists.linux.dev>,
 <linux-integrity@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH v2 1/4] tsm: Runtime measurement register support
From: "Jarkko Sakkinen" <jarkko@kernel.org>
To: "Samuel Ortiz" <sameo@rivosinc.com>, "Dan Williams"
 <dan.j.williams@intel.com>
References: <20240128212532.2754325-1-sameo@rivosinc.com>
 <20240128212532.2754325-2-sameo@rivosinc.com>
In-Reply-To: <20240128212532.2754325-2-sameo@rivosinc.com>

On Sun Jan 28, 2024 at 11:25 PM EET, Samuel Ortiz wrote:
> Some confidential computing architecture (Intel TDX, ARM-CCA, RISC-V
> CoVE) provide the TVM (confidential computing guest) with a set of
> runtime measurement registers (RTMR). TVMs can extend those registers
> with their measurements at runtime, i.e. after the TVM initial
> measurements are finalized and the TVM actually runs.
>
> RTMRs are separated from the initial measurement registers set, and TSMs

"measurement registers" and you do not need to cross-check what the
heck RTMR was anyway.

BR, Jarkko