From nobody Tue Feb 10 01:34:52 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1713885543; cv=none; d=zohomail.com; s=zohoarc; b=InvLhsm1ejPoyVX4hESOmfznOlewDfPtDTIm/c1drLgheSBgJl0izbgPkpbuo9uT5NTnQjqxU6tiy9rAVHSdRPHtb3N3gK1r9shGXJIssCRCpZ639BgkWiiS+IFWIY7zfIr7jBBiH1HmQg3m2/+ye+Ri8KfNT7EW9L/jT5Szau0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1713885543; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=6/djvnyJ3G6gPXkBG8EvhWuhVdBWgADMbB39ElX9mpc=; b=lraZi7PV7vbpsY4QI4ST3t+fvBC+fhoovoo8HD/3xjeGwey+sDHkn68mwccl8C58MqymqONZadfOvdnW0d14x+JYKhkdELcAYs+L3yOxICHqFu9yUeodWPKvTRkKb8m1SKZSzZ+OJR4N53WnJp5/9Lc6E4TP73tXfWd1jFjtO2w= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1713885543232588.5156008316947; Tue, 23 Apr 2024 08:19:03 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rzHne-0007Kn-AG; Tue, 23 Apr 2024 11:11:14 -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 1rzHmw-0004Wh-7P for qemu-devel@nongnu.org; Tue, 23 Apr 2024 11:10:30 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rzHmu-0000DK-LS for qemu-devel@nongnu.org; Tue, 23 Apr 2024 11:10:29 -0400 Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-356-dR4necVZMkG3922FPYbx4g-1; Tue, 23 Apr 2024 11:10:23 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id AED98104B502; Tue, 23 Apr 2024 15:10:22 +0000 (UTC) Received: from avogadro.lan (unknown [10.39.192.70]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9E550200E290; Tue, 23 Apr 2024 15:10:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1713885026; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6/djvnyJ3G6gPXkBG8EvhWuhVdBWgADMbB39ElX9mpc=; b=eU4eMpXqXP0NXcPAeBHeNxIDWyGjg4HCD8gINrTA1kIDYeSa1A39ileq9CcmvOzRVOMLh2 j9rMI4MOsDuSLly322IkgqoJzI1TfnZLv1Dwc/HWSZvFbiX0I9EViOFFqEaLCQQvd6R0SV iEfWO132zMT/DhIbOAGN4xT1gvBNEXY= X-MC-Unique: dR4necVZMkG3922FPYbx4g-1 From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Pawan Gupta , Xiaoyao Li , Zhao Liu Subject: [PULL 28/63] target/i386: Export RFDS bit to guests Date: Tue, 23 Apr 2024 17:09:16 +0200 Message-ID: <20240423150951.41600-29-pbonzini@redhat.com> In-Reply-To: <20240423150951.41600-1-pbonzini@redhat.com> References: <20240423150951.41600-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.67, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1713885543649100001 Content-Type: text/plain; charset="utf-8" From: Pawan Gupta Register File Data Sampling (RFDS) is a CPU side-channel vulnerability that may expose stale register value. CPUs that set RFDS_NO bit in MSR IA32_ARCH_CAPABILITIES indicate that they are not vulnerable to RFDS. Similarly, RFDS_CLEAR indicates that CPU is affected by RFDS, and has the microcode to help mitigate RFDS. Make RFDS_CLEAR and RFDS_NO bits available to guests. Signed-off-by: Pawan Gupta Reviewed-by: Xiaoyao Li Reviewed-by: Zhao Liu Message-ID: <9a38877857392b5c2deae7e7db1b170d15510314.1710341348.git.pawan.= kumar.gupta@linux.intel.com> Signed-off-by: Paolo Bonzini --- target/i386/cpu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index c295491d8ae..eda15b0d4c7 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1158,8 +1158,8 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] =3D { NULL, "sbdr-ssdp-no", "fbsdp-no", "psdp-no", NULL, "fb-clear", NULL, NULL, NULL, NULL, NULL, NULL, - "pbrsb-no", NULL, "gds-no", NULL, - NULL, NULL, NULL, NULL, + "pbrsb-no", NULL, "gds-no", "rfds-no", + "rfds-clear", NULL, NULL, NULL, }, .msr =3D { .index =3D MSR_IA32_ARCH_CAPABILITIES, --=20 2.44.0