From patchwork Tue Oct 5 20:25:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Naveen N. Rao" X-Patchwork-Id: 12537791 X-Patchwork-Delegate: bpf@iogearbox.net 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E2A2FC433F5 for ; Tue, 5 Oct 2021 20:26:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C8BFA60F44 for ; Tue, 5 Oct 2021 20:26:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231181AbhJEU2e (ORCPT ); Tue, 5 Oct 2021 16:28:34 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:43068 "EHLO mx0b-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236289AbhJEU2c (ORCPT ); Tue, 5 Oct 2021 16:28:32 -0400 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 195K6TMl005991; Tue, 5 Oct 2021 16:26:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=N31ZSmkalAA4r8JuhplzsNHWEDti/z2o06gJg9/4Jus=; b=G+++OY+xHGibqqvoLtAEP10oeRi+t/V21V0HzCCtBJXFd0fuKcLYurmXBuKFyj/5IScC ksj9r04KVclDaHzOZ2rZYoxEGVOJ7lZ/gMG6fVbMQ5fTB1lmq6SNLYC83N547dzSZCRU nagT2KhAUfyX745SWxfveUbSAg+2WCAC64XTukrTUn8ph76ZGVjGDS4bCUbRC6U8O2cl cRS1S/Okg8NQk4inwDuOyrukPC9t7dDYRgDevushw42qxTE0dWx5nw6rVpmchfTiBtf5 vfH0kbVzoBkmXuKnK4IvAfKbs/UwqCOU3iuBCobVCxdJieVdFfbs7Pupf87ZU8QmOpRK ww== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 3bgsjredh8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 05 Oct 2021 16:26:19 -0400 Received: from m0098421.ppops.net (m0098421.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 195K7QL0008235; Tue, 5 Oct 2021 16:26:19 -0400 Received: from ppma04ams.nl.ibm.com (63.31.33a9.ip4.static.sl-reverse.com [169.51.49.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 3bgsjredh0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 05 Oct 2021 16:26:19 -0400 Received: from pps.filterd (ppma04ams.nl.ibm.com [127.0.0.1]) by ppma04ams.nl.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 195KIgKZ012963; Tue, 5 Oct 2021 20:26:17 GMT Received: from b06cxnps4076.portsmouth.uk.ibm.com (d06relay13.portsmouth.uk.ibm.com [9.149.109.198]) by ppma04ams.nl.ibm.com with ESMTP id 3bef2ax1pc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 05 Oct 2021 20:26:17 +0000 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 195KQEub32506242 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 5 Oct 2021 20:26:14 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 72936AE053; Tue, 5 Oct 2021 20:26:14 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 15B7AAE056; Tue, 5 Oct 2021 20:26:11 +0000 (GMT) Received: from naverao1-tp.ibm.com (unknown [9.43.5.112]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 5 Oct 2021 20:26:10 +0000 (GMT) From: "Naveen N. Rao" To: Michael Ellerman , Nicholas Piggin , Jordan Niethe , Daniel Borkmann , Alexei Starovoitov , Christophe Leroy , Johan Almbladh , Song Liu Cc: , Subject: [PATCH v2 05/10] powerpc/security: Add a helper to query stf_barrier type Date: Wed, 6 Oct 2021 01:55:24 +0530 Message-Id: <3bd5d7f96ea1547991ac2ce3137dc2b220bae285.1633464148.git.naveen.n.rao@linux.vnet.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: CNCi-ukBO9UKZPaYXJZPQ7njqrqHw8NW X-Proofpoint-GUID: f7V00wrIsHaCXEmsXqxbh96OPs6wvrVd X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.182.1,Aquarius:18.0.790,Hydra:6.0.391,FMLib:17.0.607.475 definitions=2021-10-05_04,2021-10-04_01,2020-04-07_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 malwarescore=0 adultscore=0 lowpriorityscore=0 phishscore=0 impostorscore=0 mlxlogscore=999 clxscore=1015 spamscore=0 bulkscore=0 suspectscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2109230001 definitions=main-2110050117 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Add a helper to return the stf_barrier type for the current processor. Signed-off-by: Naveen N. Rao --- arch/powerpc/include/asm/security_features.h | 5 +++++ arch/powerpc/kernel/security.c | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/arch/powerpc/include/asm/security_features.h b/arch/powerpc/include/asm/security_features.h index 792eefaf230b80..27574f218b371f 100644 --- a/arch/powerpc/include/asm/security_features.h +++ b/arch/powerpc/include/asm/security_features.h @@ -39,6 +39,11 @@ static inline bool security_ftr_enabled(u64 feature) return !!(powerpc_security_features & feature); } +#ifdef CONFIG_PPC_BOOK3S_64 +enum stf_barrier_type stf_barrier_type_get(void); +#else +static inline enum stf_barrier_type stf_barrier_type_get(void) { return STF_BARRIER_NONE; } +#endif // Features indicating support for Spectre/Meltdown mitigations diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c index 1a998490fe60f0..15fb5ea1b9eafa 100644 --- a/arch/powerpc/kernel/security.c +++ b/arch/powerpc/kernel/security.c @@ -263,6 +263,11 @@ static int __init handle_no_stf_barrier(char *p) early_param("no_stf_barrier", handle_no_stf_barrier); +enum stf_barrier_type stf_barrier_type_get(void) +{ + return stf_enabled_flush_types; +} + /* This is the generic flag used by other architectures */ static int __init handle_ssbd(char *p) {