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[23.128.96.18]) by mx.google.com with ESMTP id j8si5302496edh.457.2020.05.29.11.33.29; Fri, 29 May 2020 11:33:54 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727109AbgE2S3C (ORCPT + 99 others); Fri, 29 May 2020 14:29:02 -0400 Received: from mga09.intel.com ([134.134.136.24]:17071 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725839AbgE2S3B (ORCPT ); Fri, 29 May 2020 14:29:01 -0400 IronPort-SDR: N8TNqZzQQ+U+imeWZtq9jHbNoS16Jlcm5AEKnqDbdWEdeIe0p02Mral5FHLzxkGJY0USBjQk/V 2AoxcZ2iW+qA== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 May 2020 11:29:00 -0700 IronPort-SDR: oq3L7LkEaIoxG/tIwUVyPbkYOcm0uylNJ+LPnF5ecm5IvmLDY2gdrjVtlH2PyIgw0pMauoN/sv XdjEUxDhZdOg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,449,1583222400"; d="scan'208";a="271300883" Received: from unknown (HELO [10.255.6.235]) ([10.255.6.235]) by orsmga006.jf.intel.com with ESMTP; 29 May 2020 11:28:57 -0700 Subject: Re: [PATCH v30 09/20] mm: Introduce vm_ops->may_mprotect() To: Jarkko Sakkinen , linux-kernel@vger.kernel.org, x86@kernel.org, linux-sgx@vger.kernel.org Cc: akpm@linux-foundation.org, sean.j.christopherson@intel.com, nhorman@redhat.com, npmccallum@redhat.com, haitao.huang@intel.com, andriy.shevchenko@linux.intel.com, tglx@linutronix.de, kai.svahn@intel.com, bp@alien8.de, josh@joshtriplett.org, luto@kernel.org, kai.huang@intel.com, rientjes@google.com, cedric.xing@intel.com, puiterwijk@redhat.com, Jethro Beekman References: <20200515004410.723949-1-jarkko.sakkinen@linux.intel.com> <20200515004410.723949-10-jarkko.sakkinen@linux.intel.com> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200515004410.723949-10-jarkko.sakkinen@linux.intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/14/20 5:43 PM, Jarkko Sakkinen wrote: > From: Sean Christopherson > > Add vm_ops()->may_mprotect() to check additional constrains set by a > subsystem for a mprotect() call. This changelog needs some more detail about why this is needed. It would also be nice to include thought about what else it could get used for and what subsystems can expect by doing this and what the mm core is expected to do.