From: Alistair Francis <alistair23@gmail.com>
To: alistair@alistair23.me, linux-kernel@vger.kernel.org,
lukas@wunner.de, bhelgaas@google.com,
rust-for-linux@vger.kernel.org, akpm@linux-foundation.org,
linux-cxl@vger.kernel.org, djbw@kernel.org,
linux-pci@vger.kernel.org, jic23@kernel.org
Cc: alex.gaynor@gmail.com, wilfred.mallawa@wdc.com, gary@garyguo.net,
bjorn3_gh@protonmail.com, benno.lossin@proton.me,
aliceryhl@google.com, boqun.feng@gmail.com,
a.hindborg@kernel.org, tmgross@umich.edu, ojeda@kernel.org,
Alistair Francis <alistair.francis@wdc.com>
Subject: Re: [PATCH 08/18] PCI/TSM: Support connecting to PCIe CMA devices
Date: Thu, 18 Jun 2026 12:04:40 +1000 [thread overview]
Message-ID: <CAKmqyKPc4hMYg5ARw3RH8KJwWfk-1CMT5zqnVrbhtdT1X3Z0aA@mail.gmail.com> (raw)
In-Reply-To: <CAKmqyKO1L+sCHWMDJ-tH1WVc+=oMVidnVSMttr6ft0-ewSjMVA@mail.gmail.com>
On Wed, May 20, 2026 at 3:56 PM Alistair Francis <alistair23@gmail.com> wrote:
>
> On Fri, May 8, 2026 at 1:18 PM <alistair23@gmail.com> wrote:
> >
> > From: Alistair Francis <alistair.francis@wdc.com>
> >
> > In the next patch we are going to add a PCIe CMA TSM driver, as such we
> > need to ensure that is_pci_tsm_pf0() will allow us to connect to CMA
> > capable devices. These devices don't necessarily has DEVCAP_TEE or IDE
> > support.
> >
> > As such for Root Complex Integrated Endpoint (PCI_EXP_TYPE_RC_END) we
> > also check for the CMA DOE feature.
>
> @Dan Williams this is the patch I really need your thoughts on.
>
> The current upstream pci_tsm code only works if IDE or TDISP is
> supported, which isn't true for CMA support.
>
> This patch works around that, but the more I think about it the
> hackier it is. I have a local change that reverts this and
> updates`tsm.c` to work with a DSM (`->dsm_dev` is NULL), but that
> doesn't feel right either. Do you have a better idea or how to enable
> a CMA TSM driver?
Gentle ping on this. Any thoughts here?
Alistair
>
> Alistair
next prev parent reply other threads:[~2026-06-18 2:05 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-08 3:16 [PATCH 00/18] lib: Rust implementation of SPDM alistair23
2026-05-08 3:16 ` [PATCH 01/18] rust: add untrusted data abstraction alistair23
2026-05-08 3:52 ` sashiko-bot
2026-05-08 5:17 ` Dirk Behme
2026-05-15 5:49 ` Alistair Francis
2026-05-08 3:16 ` [PATCH 02/18] X.509: Make certificate parser public alistair23
2026-05-08 3:45 ` sashiko-bot
2026-05-14 7:22 ` Lukas Wunner
2026-05-08 3:16 ` [PATCH 03/18] X.509: Parse Subject Alternative Name in certificates alistair23
2026-05-08 3:16 ` [PATCH 04/18] X.509: Move certificate length retrieval into new helper alistair23
2026-05-08 3:39 ` sashiko-bot
2026-05-14 6:59 ` Lukas Wunner
2026-05-08 3:16 ` [PATCH 05/18] rust: add bindings for hash.h alistair23
2026-05-08 3:43 ` sashiko-bot
2026-05-08 3:16 ` [PATCH 06/18] rust: error: impl From<FromBytesWithNulError> for Kernel Error alistair23
2026-05-08 3:51 ` sashiko-bot
2026-05-08 3:16 ` [PATCH 07/18] lib: rspdm: Initial commit of Rust SPDM alistair23
2026-05-08 3:41 ` sashiko-bot
2026-05-08 3:17 ` [PATCH 08/18] PCI/TSM: Support connecting to PCIe CMA devices alistair23
2026-05-20 5:56 ` Alistair Francis
2026-06-18 2:04 ` Alistair Francis [this message]
2026-06-18 22:51 ` Dan Williams (nvidia)
2026-05-08 3:17 ` [PATCH 09/18] PCI/CMA: Add a PCI TSM CMA driver using SPDM alistair23
2026-05-08 5:02 ` sashiko-bot
2026-05-08 3:17 ` [PATCH 10/18] PCI/CMA: Validate Subject Alternative Name in certificates alistair23
2026-05-08 3:58 ` sashiko-bot
2026-05-14 2:45 ` Alistair Francis
2026-05-14 13:14 ` Lukas Wunner
2026-05-08 3:17 ` [PATCH 11/18] lib: rspdm: Support SPDM get_version alistair23
2026-05-08 3:50 ` sashiko-bot
2026-05-08 3:17 ` [PATCH 12/18] lib: rspdm: Support SPDM get_capabilities alistair23
2026-05-08 4:05 ` sashiko-bot
2026-05-08 3:17 ` [PATCH 13/18] lib: rspdm: Support SPDM negotiate_algorithms alistair23
2026-05-08 4:05 ` sashiko-bot
2026-05-08 3:17 ` [PATCH 14/18] lib: rspdm: Support SPDM get_digests alistair23
2026-05-08 4:06 ` sashiko-bot
2026-05-08 3:17 ` [PATCH 15/18] lib: rspdm: Support SPDM get_certificate alistair23
2026-05-08 4:23 ` sashiko-bot
2026-05-08 3:17 ` [PATCH 16/18] lib: rspdm: Support SPDM certificate validation alistair23
2026-05-08 4:25 ` sashiko-bot
2026-05-08 3:17 ` [PATCH 17/18] rust: allow extracting the buffer from a CString alistair23
2026-05-08 3:17 ` [PATCH 18/18] lib: rspdm: Support SPDM challenge alistair23
2026-05-08 4:19 ` sashiko-bot
2026-05-17 8:09 ` Dirk Behme
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