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Date: Fri, 17 Apr 2026 06:34:26 +0200
From: Lukas Wunner <lukas@wunner.de>
To: Dan Williams <djbw@kernel.org>
Cc: Alistair Francis <alistair23@gmail.com>, bhelgaas@google.com,
	rust-for-linux@vger.kernel.org, akpm@linux-foundation.org,
	linux-pci@vger.kernel.org, Jonathan.Cameron@huawei.com,
	linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org,
	alex.gaynor@gmail.com, benno.lossin@proton.me, boqun.feng@gmail.com,
	a.hindborg@kernel.org, gary@garyguo.net, bjorn3_gh@protonmail.com,
	tmgross@umich.edu, ojeda@kernel.org, wilfred.mallawa@wdc.com,
	aliceryhl@google.com, Alistair Francis <alistair.francis@wdc.com>
Subject: Re: [RFC v3 00/27] lib: Rust implementation of SPDM
Message-ID: <aeG4UnyYd1FKdt1D@wunner.de>
References: <20260211032935.2705841-1-alistair.francis@wdc.com>
 <698d6b7faa190_2e57100d3@dwillia2-mobl4.notmuch>
 <CAKmqyKPyR165rACXRMJXgyUOp6OUdQqSsym-gfYVFnKLZ4ednQ@mail.gmail.com>
 <69e19c80b892b_fe0831000@djbw-dev.notmuch>
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In-Reply-To: <69e19c80b892b_fe0831000@djbw-dev.notmuch>

On Thu, Apr 16, 2026 at 07:35:44PM -0700, Dan Williams wrote:
> Later in the thread I proposed an alternative that instead of supporting
> 2 flavors of uapi through "authenticated", instead implement CMA as
> another TSM driver [1].
> 
> [1]: http://lore.kernel.org/69976d7d39c60_2f4a1009@dwillia2-mobl4.notmuch

Please keep in mind though that CMA is just the PCIe adaption of SPDM,
SPDM is not only needed for PCIe but also SCSI, ATA and possibly others
and so implementing CMA as a TSM driver must not preclude use of SPDM
in other subsystems.

Thanks,

Lukas