From patchwork Wed Feb 9 18:57:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Lobakin X-Patchwork-Id: 12740820 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D7752C4332F for ; Wed, 9 Feb 2022 19:03:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241865AbiBITDT (ORCPT ); Wed, 9 Feb 2022 14:03:19 -0500 Received: from gmail-smtp-in.l.google.com ([23.128.96.19]:49482 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241741AbiBITDC (ORCPT ); Wed, 9 Feb 2022 14:03:02 -0500 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 96718C05CB8E; Wed, 9 Feb 2022 11:01:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1644433307; x=1675969307; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=lDXFHCnNkuwrtByUN11SlzF5cvcRHsyXQHMq9A+A45Q=; b=UyGDTqy3xeJWgOLYPD7p7ujR6ZKY4hlAMhWdyQ9IfW9wBvp2kleP/joM w6J9ZD1+7QiPjKOdGzT0lK5QH1PPxcm36Q+egQxp+kTGJi/speam/VaKk tvZal/jD7o/mVhWLTIYAvQ7KUFV6KoNgAOI+ugclwzA+k6sLTAPkNfuSn YFbKYKmCmBG4Kqb0OmmxBUlNJIvSddNmnG3KvzqofzZT8bZeznmbO5HQl rIM4XhPFY2QNjBNgsrayIAAlnJ0g8IDxkh5YSCGV25QI3Qi5e4nbbRJnh YIHpyiqb3U0pI8prYFo8HVtdgj5kcar9YFJuL0rYat1PtlRasruwSwYon w==; X-IronPort-AV: E=McAfee;i="6200,9189,10253"; a="236710002" X-IronPort-AV: E=Sophos;i="5.88,356,1635231600"; d="scan'208";a="236710002" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Feb 2022 10:59:20 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,356,1635231600"; d="scan'208";a="485376320" Received: from irvmail001.ir.intel.com ([10.43.11.63]) by orsmga006.jf.intel.com with ESMTP; 09 Feb 2022 10:59:11 -0800 Received: from newjersey.igk.intel.com (newjersey.igk.intel.com [10.102.20.203]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id 219IwjQY031082; Wed, 9 Feb 2022 18:59:09 GMT From: Alexander Lobakin To: linux-hardening@vger.kernel.org, x86@kernel.org Cc: Alexander Lobakin , Borislav Petkov , Jesse Brandeburg , Kristen Carlson Accardi , Kees Cook , Miklos Szeredi , Ard Biesheuvel , Tony Luck , Bruce Schlobohm , Jessica Yu , kernel test robot , Miroslav Benes , Evgenii Shatokhin , Jonathan Corbet , Masahiro Yamada , Michal Marek , Nick Desaulniers , Herbert Xu , "David S. Miller" , Thomas Gleixner , Will Deacon , Ingo Molnar , Christoph Hellwig , Dave Hansen , "H. Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Arnd Bergmann , Josh Poimboeuf , Nathan Chancellor , Masami Hiramatsu , Marios Pomonis , Sami Tolvanen , "H.J. Lu" , Nicolas Pitre , linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-arch@vger.kernel.org, live-patching@vger.kernel.org, llvm@lists.linux.dev Subject: [PATCH v10 11/15] x86/boot: allow FG-KASLR to be selected Date: Wed, 9 Feb 2022 19:57:48 +0100 Message-Id: <20220209185752.1226407-12-alexandr.lobakin@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220209185752.1226407-1-alexandr.lobakin@intel.com> References: <20220209185752.1226407-1-alexandr.lobakin@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org Now that the kernel has full support of FG-KASLR from both core and x86 code, allow FG-KASLR to be enabled for x86_64 if the "regular" KASLR is also turned on. Signed-off-by: Alexander Lobakin --- arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index f6bb48d41349..d5442107a915 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -105,6 +105,7 @@ config X86 select ARCH_SUPPORTS_ASM_FUNCTION_SECTIONS select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_SUPPORTS_DEBUG_PAGEALLOC + select ARCH_SUPPORTS_FG_KASLR if X86_64 && RANDOMIZE_BASE select ARCH_SUPPORTS_PAGE_TABLE_CHECK if X86_64 select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 select ARCH_SUPPORTS_KMAP_LOCAL_FORCE_MAP if NR_CPUS <= 4096