Commit b5425f54 authored by Vishal Verma's avatar Vishal Verma Committed by Dave Hansen
Browse files

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@intel.com> [2]

Signed-off-by: default avatarVishal Verma <vishal.l.verma@intel.com>
Signed-off-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: default avatarChao Gao <chao.gao@intel.com>
Reviewed-by: default avatarTony Lindgren <tony.lindgren@linux.intel.com>
Reviewed-by: default avatarKiryl Shutsemau <kas@kernel.org>
Reviewed-by: default avatarBinbin Wu <binbin.wu@linux.intel.com>
Reviewed-by: default avatarXiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: default avatarRick Edgecombe <rick.p.edgecombe@intel.com>
Reviewed-by: default avatarKai Huang <kai.huang@intel.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]
Link: https://patch.msgid.link/20260109-tdx_print_module_version-v2-2-e10e4ca5b450@intel.com
parent 311214bf

arch/x86/virt/vmx/tdx/tdx_global_metadata.c

+6 −0
Original line number Diff line number Diff line
@@ -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);