[tip: x86/tdx] x86/virt/tdx: Print TDX module version during init

[tip-bot2 for Vishal Verma]

The following commit has been merged into the x86/tdx branch of tip:

Commit-ID:     b5425f5406ee1b4bd84720f68020ef18ce380bab
Gitweb:        https://git.kernel.org/tip/b5425f5406ee1b4bd84720f68020ef18ce380bab
Author:        Vishal Verma <vishal.l.verma@xxxxxxxxx>
AuthorDate:    Fri, 09 Jan 2026 12:14:31 -07:00
Committer:     Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
CommitterDate: Wed, 25 Feb 2026 14:46:33 -08:00

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@xxxxxxxxx> [2]

Signed-off-by: Vishal Verma <vishal.l.verma@xxxxxxxxx>
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Reviewed-by: Chao Gao <chao.gao@xxxxxxxxx>
Reviewed-by: Tony Lindgren <tony.lindgren@xxxxxxxxxxxxxxx>
Reviewed-by: Kiryl Shutsemau <kas@xxxxxxxxxx>
Reviewed-by: Binbin Wu <binbin.wu@xxxxxxxxxxxxxxx>
Reviewed-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>
Reviewed-by: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>
Reviewed-by: Kai Huang <kai.huang@xxxxxxxxx>
Link: https://lore.kernel.org/all/CAGtprH8eXwi-TcH2+-Fo5YdbEwGmgLBh9ggcDvd6N=bsKEJ_WQ@xxxxxxxxxxxxxx/ # [1]
Link: https://lore.kernel.org/all/6b5553756f56a8e3222bfc36d0bdb3e5192137b7.1731318868.git.kai.huang@xxxxxxxxx # [2]
Link: https://patch.msgid.link/20260109-tdx_print_module_version-v2-2-e10e4ca5b450@xxxxxxxxx
---
 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 0454124..4c9917a 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);