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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43EF2C4332F for ; Wed, 13 Oct 2021 00:55:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2800E60EBB for ; Wed, 13 Oct 2021 00:55:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236928AbhJMA5n (ORCPT ); Tue, 12 Oct 2021 20:57:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:41232 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236904AbhJMA5X (ORCPT ); Tue, 12 Oct 2021 20:57:23 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5762260EB4; Wed, 13 Oct 2021 00:55:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1634086521; bh=a6O9WCTF/LMiJc6mOpPugAxRSA3fH/eJdsDcax8o1+w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YPn4gDi9E7wCTfAAk+Dk+iea1zPKtZ8A0GEXdXRslsJNVKigirHBFvY69OlywX4lr zcEZCTKvMsKMiOk0OdQp+yt0GNReh/Vut/GJLLNX+V9sFF/tysY6UQIjpfxw1E14hV XWzeWBPL+ZSs8L7TcanEIz8zTJYgeDE2OSbmo2raSv3n6GMHR8eBiLCpdrS6uStv/Z Ak7/w94FvOEF8ggl6YHq6qD2zczBdISuotTL3oCyJ2r5htIMQzARuJRhL4YVfqV5ih CvvQxmXEgDDS2gqTjYYKk6pfTKSQ8m9ZYefQK6UxxnprLnuTthbBWHBQArHK/GsRBz HhLj7iEHlicQg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: "Naveen N. Rao" , Michael Ellerman , Sasha Levin , npiggin@gmail.com, dja@axtens.net, lihuafei1@huawei.com, aik@ozlabs.ru, aneesh.kumar@linux.ibm.com, christophe.leroy@csgroup.eu, linuxppc-dev@lists.ozlabs.org Subject: [PATCH AUTOSEL 5.14 15/17] powerpc/security: Add a helper to query stf_barrier type Date: Tue, 12 Oct 2021 20:54:39 -0400 Message-Id: <20211013005441.699846-15-sashal@kernel.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211013005441.699846-1-sashal@kernel.org> References: <20211013005441.699846-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Naveen N. Rao" [ Upstream commit 030905920f32e91a52794937f67434ac0b3ea41a ] Add a helper to return the stf_barrier type for the current processor. Signed-off-by: Naveen N. Rao Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/3bd5d7f96ea1547991ac2ce3137dc2b220bae285.1633464148.git.naveen.n.rao@linux.vnet.ibm.com Signed-off-by: Sasha Levin --- 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 792eefaf230b..27574f218b37 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 cc51fa52e783..e723ff77cc9b 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) { -- 2.33.0