linux-kernel - [PATCH v2 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: <20260109-tdx_print_module_version-v2-2-e10e4ca5b450@intel.com>
Date: Fri, 09 Jan 2026 12:14:31 -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 v2 2/2] x86/virt/tdx: Print TDX module version during init

It is useful to print the TDX module version in dmesg logs. This is
currently the only way to determine the module version from the host. It
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

Print the version in get_tdx_sys_info(), right after the version
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_global_metadata.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/x86/virt/vmx/tdx/tdx_global_metadata.c b/arch/x86/virt/vmx/tdx/tdx_global_metadata.c
index 0454124803f3..4c9917a9c2c3 100644
--- a/arch/x86/virt/vmx/tdx/tdx_global_metadata.c
+++ b/arch/x86/virt/vmx/tdx/tdx_global_metadata.c
@@ -105,6 +105,12 @@ static int get_tdx_sys_info(struct tdx_sys_info *sysinfo)
 	int ret = 0;

 	ret = ret ?: get_tdx_sys_info_version(&sysinfo->version);
+
+	pr_info("Module version: %u.%u.%02u\n",
+		sysinfo->version.major_version,
+		sysinfo->version.minor_version,
+		sysinfo->version.update_version);
+
 	ret = ret ?: get_tdx_sys_info_features(&sysinfo->features);
 	ret = ret ?: get_tdx_sys_info_tdmr(&sysinfo->tdmr);
 	ret = ret ?: get_tdx_sys_info_td_ctrl(&sysinfo->td_ctrl);

-- 
2.52.0