linux-kernel - [PATCH v2 0/3] Expose TDX Module version

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20260105074350.98564-1-chao.gao@intel.com>
Date: Sun,  4 Jan 2026 23:43:43 -0800
From: Chao Gao <chao.gao@...el.com>
To: kvm@...r.kernel.org,
	linux-coco@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	x86@...nel.org
Cc: vishal.l.verma@...el.com,
	kai.huang@...el.com,
	dan.j.williams@...el.com,
	yilun.xu@...ux.intel.com,
	vannapurve@...gle.com,
	Chao Gao <chao.gao@...el.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Ingo Molnar <mingo@...hat.com>,
	Kiryl Shutsemau <kas@...nel.org>,
	Rick Edgecombe <rick.p.edgecombe@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH v2 0/3] Expose TDX Module version

Hi reviewers,

This series is quite straightforward and I believe it's well-polished.
Please consider providing your ack tags. However, since it depends on
two other series (listed below), please review those dependencies first if
you haven't already.

Changes in v2:
 - Print TDX Module version in demsg (Vishal)
 - Remove all descriptions about autogeneration (Rick)
 - Fix typos (Kai)
 - Stick with TDH.SYS.RD (Dave/Yilun)
 - Rebase onto Sean's VMXON v2 series

=== Problem & Solution === 

Currently, there is no user interface to get the TDX Module version.
However, in bug reporting or analysis scenarios, the first question
normally asked is which TDX Module version is on your system, to determine
if this is a known issue or a new regression.

To address this issue, this series exposes the TDX Module version as
sysfs attributes of the tdx_host device [*] and also prints it in dmesg
to keep a record.


=== Dependency ===

This series has two dependencies:

 1. Have TDX handle VMXON during bringup
    https://lore.kernel.org/kvm/20251206011054.494190-1-seanjc@google.com/#t
 2. TDX host virtual device (the first patch in the series below)
    https://lore.kernel.org/kvm/20251117022311.2443900-2-yilun.xu@linux.intel.com/

For your convenience, both dependencies and the series are also
available at

https://github.com/gaochaointel/linux-dev/tree/tdx-module-version-v2


Chao Gao (2):
  x86/virt/tdx: Retrieve TDX Module version
  coco/tdx-host: Expose TDX Module version

Vishal Verma (1):
  x86/virt/tdx: Print TDX Module version during init

 .../ABI/testing/sysfs-devices-faux-tdx-host   |  6 +++++
 arch/x86/include/asm/tdx_global_metadata.h    |  7 +++++
 arch/x86/virt/vmx/tdx/tdx.c                   |  9 +++++++
 arch/x86/virt/vmx/tdx/tdx_global_metadata.c   | 16 ++++++++++++
 drivers/virt/coco/tdx-host/tdx-host.c         | 26 ++++++++++++++++++-
 5 files changed, 63 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/ABI/testing/sysfs-devices-faux-tdx-host

-- 
2.47.3