From: Chao Gao Date: Wed, 20 May 2026 22:29:12 +0000 (-0700) Subject: x86/virt/tdx: Refresh TDX module version after update X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=856bc8bb990e21546fadff83502cdad33660a18e;p=thirdparty%2Fkernel%2Flinux.git x86/virt/tdx: Refresh TDX module version after update The kernel exposes the TDX module version through sysfs so userspace can check update compatibility. That information needs to remain accurate across runtime updates. A runtime update may change the module's update_version, so refresh the cached version right after a successful update. Drop __ro_after_init from tdx_sysinfo because it is now updated at runtime. Do not refresh the rest of tdx_sysinfo, even if some values change across updates. TDX module updates are backward compatible, so existing tdx_sysinfo consumers, such as KVM, can continue to operate without seeing the new values. [ dhansen: trim changelog ] Signed-off-by: Chao Gao Signed-off-by: Dave Hansen Reviewed-by: Rick Edgecombe Link: https://patch.msgid.link/20260520133909.409394-22-chao.gao@intel.com --- diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c index d54c2eca3c676..b15269b5941dc 100644 --- a/arch/x86/virt/vmx/tdx/tdx.c +++ b/arch/x86/virt/vmx/tdx/tdx.c @@ -67,7 +67,7 @@ static struct tdmr_info_list tdx_tdmr_list; /* All TDX-usable memory regions. Protected by mem_hotplug_lock. */ static LIST_HEAD(tdx_memlist); -static struct tdx_sys_info tdx_sysinfo __ro_after_init; +static struct tdx_sys_info tdx_sysinfo; static DEFINE_RAW_SPINLOCK(sysinit_lock); @@ -1321,6 +1321,13 @@ int tdx_module_run_update(void) if (ret) return ret; + ret = get_tdx_sys_info_version(&tdx_sysinfo.version); + /* + * Only fails if there is something unexpected + * and severely wrong with the module. + */ + WARN_ON_ONCE(ret); + tdx_module_state.initialized = true; return 0; } diff --git a/arch/x86/virt/vmx/tdx/tdx_global_metadata.c b/arch/x86/virt/vmx/tdx/tdx_global_metadata.c index e793dec688abd..e49c300f23d43 100644 --- a/arch/x86/virt/vmx/tdx/tdx_global_metadata.c +++ b/arch/x86/virt/vmx/tdx/tdx_global_metadata.c @@ -7,7 +7,7 @@ * Include this file to other C file instead. */ -static __init int get_tdx_sys_info_version(struct tdx_sys_info_version *sysinfo_version) +static int get_tdx_sys_info_version(struct tdx_sys_info_version *sysinfo_version) { int ret = 0; u64 val;