From: Jason Gunthorpe <jgg@nvidia.com>
To: Dave Jiang <dave.jiang@intel.com>
Cc: "Reshetova, Elena" <elena.reshetova@intel.com>,
Xu Yilun <yilun.xu@linux.intel.com>,
"Aneesh Kumar K.V" <aneesh.kumar@kernel.org>,
"linux-coco@lists.linux.dev" <linux-coco@lists.linux.dev>,
Jiri Pirko <jiri@resnulli.us>,
"Tian, Kevin" <kevin.tian@intel.com>,
Alexey Kardashevskiy <aik@amd.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Steven Price <steven.price@arm.com>,
Kiryl Shutsemau <kas@kernel.org>,
"Edgecombe, Rick P" <rick.p.edgecombe@intel.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Jonathan Cameron <jic23@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Ashish Kalra <ashish.kalra@amd.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
John Allen <john.allen@amd.com>, Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
"patches@lists.linux.dev" <patches@lists.linux.dev>
Subject: Re: [RFC PATCH v1 10/11] virt: coco: arm-cca-host: Publish slot zero and establish streams after acceptance
Date: Mon, 9 Nov 2026 19:40:32 -0400 [thread overview]
Message-ID: <20261109234032.GT770409@nvidia.com> (raw)
In-Reply-To: <e1fe8fa5-7bcd-46e3-bfe8-368582304222@intel.com>
On Mon, Nov 09, 2026 at 01:54:57PM -0700, Dave Jiang wrote:
> > Why? Seems like another wasted operation..
>
> The TDX module runs it as part of the connect and with the current
> module the host can't skip it. I'll discuss with Elena and see if
> this can be different.
Does it come out anywhere and become visible to the host or guest?
> > In practice this means all the TSMs will need the kernel to tell it
> > what SPDM versions it can go up to.
>
> TDX has no input for that today. Will discuss with Elena.
Nobody does, but I'm interpreting that as meaning 1.2 doesn't require
a flag and if anyone does 1.3 they will then need to add a 'enable
1.3' flag from the kernel, for example.
Jason
next prev parent reply other threads:[~2026-11-09 23:40 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-28 15:26 [RFC PATCH v1 00/11] PCI/TSM: Add CTLV attestation Aneesh Kumar K.V (Arm)
2026-10-28 15:26 ` [RFC PATCH v1 01/11] attestation: Restrict inherited operations per instance Aneesh Kumar K.V (Arm)
2026-10-30 13:29 ` Jiri Pirko
2026-10-28 15:26 ` [RFC PATCH v1 02/11] attestation: Filter evidence objects " Aneesh Kumar K.V (Arm)
2026-10-30 13:44 ` Jiri Pirko
2026-10-31 6:24 ` Aneesh Kumar K.V
2026-11-02 19:14 ` Jiri Pirko
2026-10-28 15:26 ` [RFC PATCH v1 03/11] attestation: Enter secure operation when evidence is accepted Aneesh Kumar K.V (Arm)
2026-10-30 13:51 ` Jiri Pirko
2026-10-30 15:36 ` Jason Gunthorpe
2026-10-31 4:09 ` Aneesh Kumar K.V
2026-11-02 11:28 ` Jiri Pirko
2026-10-28 15:26 ` [RFC PATCH v1 04/11] attestation: Bind object selection to accepted evidence snapshots Aneesh Kumar K.V (Arm)
2026-10-28 15:26 ` [RFC PATCH v1 05/11] attestation: Make the evidence-get challenge attribute optional Aneesh Kumar K.V (Arm)
2026-10-28 15:26 ` [RFC PATCH v1 06/11] PCI/TSM: Describe the PCI attestation control family Aneesh Kumar K.V (Arm)
2026-10-30 14:01 ` Jiri Pirko
2026-10-30 15:43 ` Jason Gunthorpe
2026-11-02 12:45 ` Jiri Pirko
2026-11-03 15:45 ` Jason Gunthorpe
2026-11-04 9:21 ` Jiri Pirko
2026-11-04 14:00 ` Jason Gunthorpe
2026-10-31 4:05 ` Aneesh Kumar K.V
2026-11-02 11:50 ` Jiri Pirko
2026-11-03 15:35 ` Jason Gunthorpe
2026-10-31 4:22 ` Aneesh Kumar K.V
2026-11-02 11:30 ` Jiri Pirko
2026-11-03 15:39 ` Jason Gunthorpe
2026-10-28 15:26 ` [RFC PATCH v1 07/11] attestation: Add attestation helpers for PCI/TSM integration Aneesh Kumar K.V (Arm)
2026-10-28 15:26 ` [RFC PATCH v1 08/11] PCI/TSM: Bind CTLV attestation to connected and locked contexts Aneesh Kumar K.V (Arm)
2026-10-28 22:56 ` Dave Jiang
2026-10-29 5:30 ` Aneesh Kumar K.V
2026-10-29 12:41 ` Jason Gunthorpe
2026-10-30 14:04 ` Jiri Pirko
2026-10-30 14:08 ` Jiri Pirko
2026-10-30 15:39 ` Jason Gunthorpe
2026-11-02 12:11 ` Jiri Pirko
2026-11-03 15:41 ` Jason Gunthorpe
2026-10-28 15:26 ` [RFC PATCH v1 09/11] crypto/ccp: Defer SEV-TIO link setup until evidence acceptance Aneesh Kumar K.V (Arm)
2026-11-06 7:47 ` Alexey Kardashevskiy
2026-11-06 13:14 ` Aneesh Kumar K.V
2026-11-06 14:21 ` Jason Gunthorpe
2026-11-09 10:03 ` Alexey Kardashevskiy
2026-11-12 6:23 ` Aneesh Kumar K.V
2026-10-28 15:26 ` [RFC PATCH v1 10/11] virt: coco: arm-cca-host: Publish slot zero and establish streams after acceptance Aneesh Kumar K.V (Arm)
2026-10-29 16:56 ` Dave Jiang
2026-10-29 17:10 ` Jason Gunthorpe
2026-10-30 9:58 ` Reshetova, Elena
2026-10-30 13:15 ` Jason Gunthorpe
2026-10-31 3:47 ` Aneesh Kumar K.V
2026-11-02 10:11 ` Reshetova, Elena
2026-11-02 17:26 ` Jason Gunthorpe
2026-11-03 12:01 ` Reshetova, Elena
2026-11-03 15:16 ` Jason Gunthorpe
2026-11-04 8:03 ` Xu Yilun
2026-11-04 9:49 ` Reshetova, Elena
2026-11-04 13:41 ` Jason Gunthorpe
2026-11-04 16:54 ` Dave Jiang
2026-11-06 15:53 ` Dave Jiang
2026-11-06 19:30 ` Jason Gunthorpe
2026-11-06 22:39 ` Dave Jiang
2026-11-08 18:33 ` Jason Gunthorpe
2026-11-09 10:55 ` Reshetova, Elena
2026-11-09 13:47 ` Jason Gunthorpe
2026-11-09 17:37 ` Dave Jiang
2026-11-09 18:53 ` Jason Gunthorpe
2026-11-09 20:54 ` Dave Jiang
2026-11-09 23:40 ` Jason Gunthorpe [this message]
2026-11-10 13:15 ` Reshetova, Elena
2026-11-10 14:20 ` Jason Gunthorpe
2026-11-11 13:09 ` Reshetova, Elena
2026-11-11 14:13 ` Jason Gunthorpe
2026-11-12 1:48 ` Alexey Kardashevskiy
2026-11-12 12:31 ` Jason Gunthorpe
2026-11-10 1:40 ` Alistair
2026-11-10 15:07 ` Jason Gunthorpe
2026-11-10 5:32 ` Alexey Kardashevskiy
2026-11-10 12:52 ` Jason Gunthorpe
2026-11-11 9:03 ` Alexey Kardashevskiy
2026-11-12 9:37 ` Aneesh Kumar K.V
2026-11-12 14:52 ` Jason Gunthorpe
2026-11-12 15:47 ` Dave Jiang
2026-11-12 16:37 ` Jason Gunthorpe
2026-11-10 20:07 ` Jason Gunthorpe
2026-11-04 9:03 ` Reshetova, Elena
2026-11-04 13:48 ` Jason Gunthorpe
2026-11-06 8:24 ` Aneesh Kumar K.V
2026-11-06 12:49 ` Reshetova, Elena
2026-11-06 15:53 ` Aneesh Kumar K.V
2026-11-06 18:54 ` Jason Gunthorpe
2026-11-03 16:31 ` Aneesh Kumar K.V
2026-11-03 17:56 ` Jason Gunthorpe
2026-11-02 10:05 ` Reshetova, Elena
2026-11-02 10:22 ` Reshetova, Elena
2026-11-02 17:37 ` Jason Gunthorpe
2026-10-28 15:26 ` [RFC PATCH v1 11/11] virt: coco: arm-cca-guest: Refresh selected evidence against trusted digests Aneesh Kumar K.V (Arm)
2026-10-30 12:34 ` [RFC PATCH v1 00/11] PCI/TSM: Add CTLV attestation Xu Yilun
2026-10-30 15:32 ` Jason Gunthorpe
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