linux-kernel - [PATCH 2/2] x86/virt/tdx: Print TDX module version during init

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

Message-Id: <20260107-tdx_print_module_version-v1-2-822baa56762d@intel.com>
Date: Wed, 07 Jan 2026 17:31:29 -0700
From: Vishal Verma <vishal.l.verma@...el.com>
To: linux-kernel@...r.kernel.org, linux-coco@...ts.linux.dev, 
 kvm@...r.kernel.org
Cc: 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>, 
 Vishal Verma <vishal.l.verma@...el.com>
Subject: [PATCH 2/2] x86/virt/tdx: Print TDX module version during init

It is useful to print the TDX module version in dmesg logs. This allows
for a quick spot check for whether the correct/expected TDX module is
being loaded, and also creates a record for any future problems being
investigated. This was also requested in [1].

Include the version in the log messages during init, e.g.:

  virt/tdx: TDX module version: 1.5.24
  virt/tdx: 1034220 KB allocated for PAMT
  virt/tdx: module initialized

..followed by remaining TDX initialization messages (or errors).

Print the version early in init_tdx_module(), right after the global
metadata is read, which makes it available even if there are subsequent
initialization failures.

Based on a patch by Kai Huang <kai.huang@...el.com> [2]

Signed-off-by: Vishal Verma <vishal.l.verma@...el.com>
Reviewed-by: Chao Gao <chao.gao@...el.com>
Cc: Chao Gao <chao.gao@...el.com>
Cc: Rick Edgecombe <rick.p.edgecombe@...el.com>
Cc: Kai Huang <kai.huang@...el.com>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Dan Williams <dan.j.williams@...el.com>
Link: https://lore.kernel.org/all/CAGtprH8eXwi-TcH2+-Fo5YdbEwGmgLBh9ggcDvd6N=bsKEJ_WQ@mail.gmail.com/ # [1]
Link: https://lore.kernel.org/all/6b5553756f56a8e3222bfc36d0bdb3e5192137b7.1731318868.git.kai.huang@intel.com # [2]
---
 arch/x86/virt/vmx/tdx/tdx.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c
index 5ce4ebe99774..fba00ddc11f1 100644
--- a/arch/x86/virt/vmx/tdx/tdx.c
+++ b/arch/x86/virt/vmx/tdx/tdx.c
@@ -1084,6 +1084,11 @@ static int init_tdx_module(void)
 	if (ret)
 		return ret;

+	pr_info("Module version: %u.%u.%02u\n",
+		tdx_sysinfo.version.major_version,
+		tdx_sysinfo.version.minor_version,
+		tdx_sysinfo.version.update_version);
+
 	/* Check whether the kernel can support this module */
 	ret = check_features(&tdx_sysinfo);
 	if (ret)

-- 
2.52.0