From nobody Sun Apr 26 10:52:55 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 113EBC43334 for ; Mon, 4 Jul 2022 14:20:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233983AbiGDOUs (ORCPT ); Mon, 4 Jul 2022 10:20:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53710 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233860AbiGDOUn (ORCPT ); Mon, 4 Jul 2022 10:20:43 -0400 Received: from mail-vk1-xa35.google.com (mail-vk1-xa35.google.com [IPv6:2607:f8b0:4864:20::a35]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ECCBBFF1 for ; Mon, 4 Jul 2022 07:20:42 -0700 (PDT) Received: by mail-vk1-xa35.google.com with SMTP id b4so4509016vkh.6 for ; Mon, 04 Jul 2022 07:20:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=eclypsium.com; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=zAimGb9Is5JImE4nmMqSqzepBpLcg7BYaug+pTNW7Ek=; b=hLeZI5XnlOVI8X5L1UsRnebsCf1j7iXTfxBBuxRT+gzb/yBxg87ImZU3389sdS5Pwe 1Gjr/7jZc1u4U0+3J1tKXL2XshtUtJe6bNdRZ6wK94gsFhYAeqm0GoHnkMj6mkWFc+5q UN3HNPMRFJ/j5v07LNa0qGsLXa6MeGSZXL/+88XXOQ/rVEwfDlPltFyX4FsN+K+J4NYn hhUdZKoMebVLH8zr17dFM9LigBPzNnJZXBjbrrPnukqZUu9svNpUmk38z6ypobkV8zrU f20aFWSlvt9Da2JSHVLrcTiY2cSoraD9uILuP/PwsNtdK+T7f/5wo4H5CF64Mfj1hrxz dhYg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=zAimGb9Is5JImE4nmMqSqzepBpLcg7BYaug+pTNW7Ek=; b=XEd72G+0ZLzhlfUNRyumjkC/t0xeSF8YObBMiu50J1InhWOGr2RqOUpzxcpklL3Cpa DneVYBxXgn6CxJDoHmA0Uxo1dS0nEEoGJZ/HrjX+oHqjopuXKiifR3p/undqhMmxpIaK Ro+nu/IOB+QoxShoydYo1QRhbW3G9Ppu6XIUeF7qCROItfel/MuCMyMi0jMF51tXpm5V BRsCcm5Qorh76CfVmtETrR9Ra9yeX4GUrgAfQn/rHKCjrzgm/LTV8NWRR/T8DarD3T6b s09ojE4FydLjVmfIYg8poYJ5W3izPdm9fdNQGW6qh7Uxz51jVjJm6Npe1LxA5AOt+Bya YyNg== X-Gm-Message-State: AJIora/vf5LOY7Pibd7YQk5BL4FETh/KuK7kT/mUguVPL+46NxNXJV7m tIwFv461EwUlBQL22vGMkU++/K39vzLAkNizNfcwW/0ukxV5QC055RYMsMqCTEVHfyHoFvX6TRb m+FwoHefRFMOuasQkCwfz2G+uGxm9HApjRWezdRk26NAEiM035GRmM79Kz0YNht3onvAuAfUU2t XdA7frWvjHcIcQUBO6 X-Google-Smtp-Source: AGRyM1vy7LDgVBkGg7LAYWrQ66F4nO8Kut0awFptJNvcDqPPNbBD2w0D+uVeNGJDv10T9MtT15G+Ew== X-Received: by 2002:a1f:7249:0:b0:370:c589:aa80 with SMTP id n70-20020a1f7249000000b00370c589aa80mr10221768vkc.34.1656944441875; Mon, 04 Jul 2022 07:20:41 -0700 (PDT) Received: from localhost ([181.97.174.128]) by smtp.gmail.com with ESMTPSA id w41-20020a9f31ec000000b0038275916987sm1217904uad.14.2022.07.04.07.20.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 04 Jul 2022 07:20:41 -0700 (PDT) From: Martin Fernandez To: linux-kernel@vger.kernel.org Cc: bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, mingo@redhat.com, tglx@linutronix.de, kirill.shutemov@linux.intel.com, daniel.gutson@eclypsium.com, hughsient@gmail.com, alex.bazhaniuk@eclypsium.com, Martin Fernandez Subject: [PATCH] x86/cpuinfo: Clear X86_FEATURE_TME if TME/MKTME is disabled by BIOS Date: Mon, 4 Jul 2022 11:20:34 -0300 Message-Id: <20220704142034.1511271-1-martin.fernandez@eclypsium.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Right now the only way to check this is by greping the kernel logs, which is inconvinient. This is currently checked for fwupd for example. I understand that cpuinfo is supposed to report every feature in the cpu but since AMD is doing the same for sme/sev I think is good to have this for Intel too. Signed-off-by: Martin Fernandez --- arch/x86/kernel/cpu/intel.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index fd5dead8371c..7311172aceaf 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -570,6 +570,8 @@ static void detect_tme(struct cpuinfo_x86 *c) if (!TME_ACTIVATE_LOCKED(tme_activate) || !TME_ACTIVATE_ENABLED(tme_activ= ate)) { pr_info_once("x86/tme: not enabled by BIOS\n"); + if (mktme_status =3D=3D MKTME_UNINITIALIZED) + clear_cpu_cap(c, X86_FEATURE_TME); mktme_status =3D MKTME_DISABLED; return; } -- 2.30.2