linux-kernel - Re: [PATCH v2 1/2] x86/virt/tdx: Retrieve TDX module version

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Message-ID: <aW3nV5ZwmFnLdDss@tlindgre-MOBL1>
Date: Mon, 19 Jan 2026 10:12:07 +0200
From: Tony Lindgren <tony.lindgren@...ux.intel.com>
To: Vishal Verma <vishal.l.verma@...el.com>
Cc: linux-kernel@...r.kernel.org, linux-coco@...ts.linux.dev,
	kvm@...r.kernel.org, x86@...nel.org, Chao Gao <chao.gao@...el.com>,
	Dan Williams <dan.j.williams@...el.com>,
	Kai Huang <kai.huang@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>, Kiryl Shutsemau <kas@...nel.org>,
	Rick Edgecombe <rick.p.edgecombe@...el.com>
Subject: Re: [PATCH v2 1/2] x86/virt/tdx: Retrieve TDX module version

On Fri, Jan 09, 2026 at 12:14:30PM -0700, Vishal Verma wrote:
> From: Chao Gao <chao.gao@...el.com>
> 
> Each TDX module has several bits of metadata about which specific TDX
> module it is. The primary bit of info is the version, which has an x.y.z
> format. These represent the major version, minor version, and update
> version respectively. Knowing the running TDX Module version is valuable
> for bug reporting and debugging. Note that the module does expose other
> pieces of version-related metadata, such as build number and date. Those
> aren't retrieved for now, that can be added if needed in the future.
> 
> Retrieve the TDX Module version using the existing metadata reading
> interface. Later changes will expose this information. The metadata
> reading interfaces have existed for quite some time, so this will work
> with older versions of the TDX module as well - i.e. this isn't a new
> interface.

This is great to have for debugging, if not too late:

Reviewed-by: Tony Lindgren <tony.lindgren@...ux.intel.com>