Before commit 165e77353831 below, the kernel did not print anything during boot if X86_FEATURE_TDX_HOST_PLATFORM was not present, unless TDX enablement was explicitly requested via a module parameter. After the commit, when attempting to load TDX automatically, this is emitted to the log: virt/tdx: TDX not supported by the host platform It is emitted with the "error" level, hence it is disturbing. It is not an error to run CPUs without the feature. Drop this silent-boot-breaking error message for the automatic initialization path. Signed-off-by: Jiri Slaby (SUSE) Fixes: 165e77353831 ("KVM: x86/tdx: Do VMXON and TDX-Module initialization during subsys init") Reviewed-by: Kiryl Shutsemau (Meta) Cc: Dan Williams Cc: Chao Gao Cc: Dave Hansen Cc: Sean Christopherson --- [v2] update the commit message. Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: x86@kernel.org Cc: "H. Peter Anvin" Cc: Rick Edgecombe Cc: linux-kernel@vger.kernel.org Cc: linux-coco@lists.linux.dev Cc: kvm@vger.kernel.org --- arch/x86/virt/vmx/tdx/tdx.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c index 1b9ff749dd8e..e5fb0d382c4c 100644 --- a/arch/x86/virt/vmx/tdx/tdx.c +++ b/arch/x86/virt/vmx/tdx/tdx.c @@ -1228,10 +1228,8 @@ static __init int tdx_enable(void) enum cpuhp_state state; int ret; - if (!cpu_feature_enabled(X86_FEATURE_TDX_HOST_PLATFORM)) { - pr_err("TDX not supported by the host platform\n"); + if (!cpu_feature_enabled(X86_FEATURE_TDX_HOST_PLATFORM)) return -ENODEV; - } if (!cpu_feature_enabled(X86_FEATURE_XSAVE)) { pr_err("XSAVE is required for TDX\n"); -- 2.55.0