From mboxrd@z Thu Jan 1 00:00:00 1970 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id ABE71C3ABC3 for ; Mon, 12 May 2025 17:27:28 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uEWvQ-0006ad-Sr; Mon, 12 May 2025 13:26:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uEWvF-0006Rb-1l for qemu-devel@nongnu.org; Mon, 12 May 2025 13:26:40 -0400 Received: from mgamail.intel.com ([198.175.65.13]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uEWvC-0003rv-Fg for qemu-devel@nongnu.org; Mon, 12 May 2025 13:26:36 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1747070794; x=1778606794; h=date:from:to:cc:subject:message-id:mime-version; bh=JM9m8m9IoKVRfmW+OOBZpgOU7fi7ucvcJfL/s75wI0M=; b=Ce4MJHM6oWGxUBEm5SABMjWrArP7CyOOYUHUfDO7xYmr6Ml9z19Vnxl3 ZJK4gulXUXuTJsqhApETqvHuXL7A055wYZvEOq28ZtXiMtRY9tfQMA+Jk WvkAkm/UsUP78V7mB40kxoFgQYCPq3HyM5GEpOXNvTSQUGiC+AE/aItFJ ewvc1qeiB++7gnp1VWBZGNLDoF11dSb/TqLnJRuis7+vESbPrPJ/SoKda 72bYBV5fqFfxZ8vtmJw9Hmyh5TJp2SLLfJRZHquOy34Oj1fgZzoNEbpEy N+V6wQA7dLUMqFpZc242kL5D+TIuyVEplHeo4b82ir0QmZtGXUYKec6u1 g==; X-CSE-ConnectionGUID: ha21Z1HfRCC9AB4/s/BKvA== X-CSE-MsgGUID: 9oac1RwKR9elQj5PTel6aw== X-IronPort-AV: E=McAfee;i="6700,10204,11431"; a="59885376" X-IronPort-AV: E=Sophos;i="6.15,282,1739865600"; d="scan'208";a="59885376" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 May 2025 10:26:29 -0700 X-CSE-ConnectionGUID: Y9lxdFEwQpS5XAYuBiFh6A== X-CSE-MsgGUID: mfQuUr/gSUmRCsaTIpCgkg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,282,1739865600"; d="scan'208";a="138374819" Received: from lvelazqu-mobl.amr.corp.intel.com (HELO desk) ([10.125.146.9]) by orviesa008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 May 2025 10:26:29 -0700 Date: Mon, 12 May 2025 10:26:04 -0700 From: Pawan Gupta To: Paolo Bonzini Cc: qemu-devel@nongnu.org, Chao Gao Subject: [PATCH] target/i386: Make ITS_NO available to guests Message-ID: <8c1797e488b42650f62d816f25c58726eb522fad.1745946029.git.pawan.kumar.gupta@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: none client-ip=198.175.65.13; envelope-from=pawan.kumar.gupta@linux.intel.com; helo=mgamail.intel.com X-Spam_score_int: -38 X-Spam_score: -3.9 X-Spam_bar: --- X-Spam_report: (-3.9 / 5.0 requ) AC_FROM_MANY_DOTS=1.959, BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.551, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org When a system is not affected by Indirect Target Selection (ITS) vulnerability, VMMs set ITS_NO bit in MSR IA32_ARCH_CAPABILITIES to let the guest know that it is not affected. Make it available to guests. Signed-off-by: Pawan Gupta --- target/i386/cpu.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 1b64ceaaba46..89807ee1aace 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1370,6 +1370,14 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = { "bhi-no", NULL, NULL, NULL, "pbrsb-no", NULL, "gds-no", "rfds-no", "rfds-clear", NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, "its-no", NULL, }, .msr = { .index = MSR_IA32_ARCH_CAPABILITIES, base-commit: 56c6e249b6988c1b6edc2dd34ebb0f1e570a1365 -- 2.34.1