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 X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 69109C43467 for ; Tue, 13 Oct 2020 19:02:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3526820BED for ; Tue, 13 Oct 2020 19:02:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732351AbgJMTCJ (ORCPT ); Tue, 13 Oct 2020 15:02:09 -0400 Received: from mga11.intel.com ([192.55.52.93]:8322 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727033AbgJMTCJ (ORCPT ); Tue, 13 Oct 2020 15:02:09 -0400 IronPort-SDR: Xmr+SbJbc02BdFFtq1B/XNN/rY+O3AURZMq+1IiM3dEymPTdmXIsGqsOhGIZfEUM0Bx5lvd+b+ 993pacOQH0KQ== X-IronPort-AV: E=McAfee;i="6000,8403,9773"; a="162504516" X-IronPort-AV: E=Sophos;i="5.77,371,1596524400"; d="scan'208";a="162504516" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Oct 2020 12:02:08 -0700 IronPort-SDR: Ks8d3iW6VA2rHlMJV3z2sn2Xc4yY6st8MZ78zXSsxE3R3wJB3IbgG91rehKtBCb6H45fCfc393 cWtRORkWdzhQ== X-IronPort-AV: E=Sophos;i="5.77,371,1596524400"; d="scan'208";a="346284561" Received: from murawskx-mobl.amr.corp.intel.com (HELO [10.209.9.29]) ([10.209.9.29]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Oct 2020 12:02:08 -0700 Subject: Re: [PATCH RFC V3 9/9] x86/pks: Add PKS test code To: ira.weiny@intel.com, Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Fenghua Yu , x86@kernel.org, Dave Hansen , Dan Williams , Andrew Morton , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org References: <20201009194258.3207172-1-ira.weiny@intel.com> <20201009194258.3207172-10-ira.weiny@intel.com> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20201009194258.3207172-10-ira.weiny@intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On 10/9/20 12:42 PM, ira.weiny@intel.com wrote: > #ifdef CONFIG_X86_32 > /* > * We can fault-in kernel-space virtual memory on-demand. The > diff --git a/include/linux/pkeys.h b/include/linux/pkeys.h > index cc3510cde64e..f9552bd9341f 100644 > --- a/include/linux/pkeys.h > +++ b/include/linux/pkeys.h > @@ -47,7 +47,6 @@ static inline bool arch_pkeys_enabled(void) > static inline void copy_init_pkru_to_fpregs(void) > { > } > - > #endif /* ! CONFIG_ARCH_HAS_PKEYS */ ^ Whitespace damage > #ifndef CONFIG_ARCH_HAS_SUPERVISOR_PKEYS > diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug > index 0c781f912f9f..f015c09ba5a1 100644 > --- a/lib/Kconfig.debug > +++ b/lib/Kconfig.debug > @@ -2400,6 +2400,18 @@ config HYPERV_TESTING > help > Select this option to enable Hyper-V vmbus testing. > > +config PKS_TESTING > + bool "PKey(S)upervisor testing" Seems like we need a space in there somewhere. > + pid = fork(); > + if (pid == 0) { > + fd = open("/sys/kernel/debug/x86/run_pks", O_RDWR); > + if (fd < 0) { > + printf("cannot open file\n"); > + return -1; > + } > + Will this return code make anybody mad? Should we have a nicer return code for when this is running on non-PKS hardware? I'm not going to be too picky about this. I'll just ask one question: Has this found real bugs for you? Reviewed-by: Dave Hansen