From patchwork Tue Aug 15 04:54:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pawan Gupta X-Patchwork-Id: 1821248 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=KMW7CcS/; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RPzV84lNrz1yfS for ; Tue, 15 Aug 2023 14:55:27 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qVm4n-0000K3-QJ; Tue, 15 Aug 2023 00:54:42 -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 1qVm4l-0000Js-Jq for qemu-devel@nongnu.org; Tue, 15 Aug 2023 00:54:39 -0400 Received: from mgamail.intel.com ([192.55.52.93]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qVm4j-0008IQ-74 for qemu-devel@nongnu.org; Tue, 15 Aug 2023 00:54:39 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1692075277; x=1723611277; h=date:from:to:cc:subject:message-id:mime-version; bh=Pm0uI9c3cEbSvpHd54NlgkGYk9xvkiwwqP/rWnFt0Lc=; b=KMW7CcS/O8IGQCTrmbLhMH9JzJLYHiwIfPJNPewzIJGaIbseKDvY+nWh RwnYGaMs5ZLXEDuHawAWFibJRB7SXED8s8sZq7p1eamQJFt919YC5jSuy jbmLfkWWBzMq+A3EnNLlQsaYqZ0/Xi1DZbElJ4MVqzyfrEnSWqA7qoaxw PA0r6GxJ2tBbN6xWPQETImkpAZWZtM2a2e5NVKkkqrapgSnATc2JMdlsW qiW3MZsGPE7SzwYjX3sFLYVEOnJLecFUoGCkmTNFOFsprefbuRNVLmxPL gPwTCRiXIeiIllTypw9eBTEZkD5K2CsXJdwjm2uEWxU8W+5yGAlDxGk+6 A==; X-IronPort-AV: E=McAfee;i="6600,9927,10802"; a="369674955" X-IronPort-AV: E=Sophos;i="6.01,173,1684825200"; d="scan'208";a="369674955" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Aug 2023 21:54:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10802"; a="768704133" X-IronPort-AV: E=Sophos;i="6.01,173,1684825200"; d="scan'208";a="768704133" Received: from ajanarda-mobl1.amr.corp.intel.com (HELO desk) ([10.251.0.163]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Aug 2023 21:54:29 -0700 Date: Mon, 14 Aug 2023 21:54:27 -0700 From: Pawan Gupta To: qemu-devel Cc: Paolo Bonzini , tao1.su@linux.intel.com, xiaoyao.li@intel.com, Yu Zhang , Jinpu Wang Subject: [PATCH v2] target/i386: Export GDS_NO bit to guests Message-ID: MIME-Version: 1.0 Content-Disposition: inline Received-SPF: none client-ip=192.55.52.93; envelope-from=pawan.kumar.gupta@linux.intel.com; helo=mgamail.intel.com X-Spam_score_int: -12 X-Spam_score: -1.3 X-Spam_bar: - X-Spam_report: (-1.3 / 5.0 requ) AC_FROM_MANY_DOTS=2.999, BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=no 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Gather Data Sampling (GDS) is a side-channel attack using Gather instructions. Some Intel processors will set ARCH_CAP_GDS_NO bit in MSR IA32_ARCH_CAPABILITIES to report that they are not vulnerable to GDS. Make this bit available to guests. Closes: https://lore.kernel.org/qemu-devel/CAMGffEmG6TNq0n3+4OJAgXc8J0OevY60KHZekXCBs3LoK9vehA@mail.gmail.com/ Reported-by: Jack Wang Signed-off-by: Pawan Gupta Tested-by: Jack Wang Tested-by: Daniel Sneddon Reviewed-by: Xiaoyao Li --- v2: Added commit tags v1: https://lore.kernel.org/qemu-devel/c373f3f92b542b738f296d44bb6a916a1cded7bd.1691774049.git.pawan.kumar.gupta@linux.intel.com/ target/i386/cpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 97ad229d8ba3..48709b77689f 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1155,7 +1155,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = { NULL, "sbdr-ssdp-no", "fbsdp-no", "psdp-no", NULL, "fb-clear", NULL, NULL, NULL, NULL, NULL, NULL, - "pbrsb-no", NULL, NULL, NULL, + "pbrsb-no", NULL, "gds-no", NULL, NULL, NULL, NULL, NULL, }, .msr = {