Received: by 2002:a05:6a10:a0d1:0:0:0:0 with SMTP id j17csp3230352pxa; Tue, 18 Aug 2020 09:45:28 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwQE1Z096XDonia8Dephm0R4IFPokKewugNhJCUJeYC0SbP7fJ5Fi/rryL6HGiYmuK+z2Vd X-Received: by 2002:a50:fc0a:: with SMTP id i10mr21106275edr.5.1597769128698; Tue, 18 Aug 2020 09:45:28 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1597769128; cv=none; d=google.com; s=arc-20160816; b=WtSfwo23rCEDAttYTgx2IapYEhGeJA7M3aXwGDFbMfxBsUzDenOmBbbO113dArFd1F phmUvz9MXoT5sQIfF8a+4+Dr+MnPMAppzQwAhjrKjO4Rwrf5HmapeT+AE14tGjNT0W1+ Bm1obUXYAzWdeHnZo1iSTQXI7seEH9XiRNIrxFEIovx6HOQqNAd6FrA/V404M/BBX2Zw FDmao2kwLLthKqwoj27Tu4baSJDFFWH56x1/o2HWhydfE6+RHQBr5szPCmqy0gbXx8W2 6BuZWTeaDMLrzpKuGvr1kLXGWIPhIxIqtFBqusxJ+NUicGHL10lPSECVod0A4mMM4elB RdAw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:organization:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:ironport-sdr:ironport-sdr; bh=hvbcpaSxJsM3hQxnbGMGYtgTRYTYJvNEij3HfqMB1nE=; b=d6W2gT5/CLAPi+/0remoRxUfkBLBm6hjirRUbuYAj3J45B7yAZYqbWOfmh28lw65xY 6XxPutWjWGNhzUD1N/fINYOA+IzRJYtPllsACbKHuOHP/oVmrUOA73cehPM/e2XZMjZN 8wqgvCXhWJEVKuHe1DTgs18r20DZ2fKXCfqLqdv0v+jgA7vZLUt3mARu6rqLLgAf/rV0 bF/nGaYHtLPn6U2ypMozqxKm9sa19V+qUtDsSjaEZLcvfN93Ifn7v1tPVfxWQjczNG3Z TJxRvdSnmkgT7t2wj7uR3MJzbs6/kMqdVntjJVU0OaCmM8gUM9XO7/K35LgivJ+OnATV 5EJA== ARC-Authentication-Results: i=1; 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 Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id g17si13580406edw.332.2020.08.18.09.45.04; Tue, 18 Aug 2020 09:45:28 -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 S1727942AbgHRQoE (ORCPT + 99 others); Tue, 18 Aug 2020 12:44:04 -0400 Received: from mga07.intel.com ([134.134.136.100]:21979 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726836AbgHRQoC (ORCPT ); Tue, 18 Aug 2020 12:44:02 -0400 IronPort-SDR: X6lIl8RhRVELAgfJiM7jWo/U4xtjM8W//PJZv8CyPcBT+ekwrd8bCSvbnrhPgetZ0CPbUwuEvT Mb8oMk290LlA== X-IronPort-AV: E=McAfee;i="6000,8403,9717"; a="219260080" X-IronPort-AV: E=Sophos;i="5.76,328,1592895600"; d="scan'208";a="219260080" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Aug 2020 09:44:01 -0700 IronPort-SDR: Lc8c/BFanHB/cWj0PCxNLhuy/ld9Iurt4gycRy1DgnxQg2PKNiDHY9aojoalC7SWp5JATFMSKJ 3AJ6ULnZIoUQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.76,328,1592895600"; d="scan'208";a="336673333" Received: from ribnhajh-mobl.ger.corp.intel.com (HELO localhost) ([10.249.47.113]) by orsmga007.jf.intel.com with ESMTP; 18 Aug 2020 09:43:54 -0700 Date: Tue, 18 Aug 2020 19:43:53 +0300 From: Jarkko Sakkinen To: Nathaniel McCallum Cc: Sean Christopherson , X86 ML , linux-sgx@vger.kernel.org, LKML , Andy Lutomirski , Jethro Beekman , Cedric Xing , Andrew Morton , Andy Shevchenko , asapek@google.com, Borislav Petkov , chenalexchen@google.com, Conrad Parker , cyhanish@google.com, Dave Hansen , "Huang, Haitao" , Josh Triplett , "Huang, Kai" , "Svahn, Kai" , Keith Moyer , Christian Ludloff , Andy Lutomirski , Neil Horman , Patrick Uiterwijk , David Rientjes , Thomas Gleixner , yaozhangx@google.com Subject: Re: [PATCH v36 21/24] x86/vdso: Implement a vDSO for Intel SGX enclave call Message-ID: <20200818164353.GH137138@linux.intel.com> References: <20200716135303.276442-1-jarkko.sakkinen@linux.intel.com> <20200716135303.276442-22-jarkko.sakkinen@linux.intel.com> <20200810222317.GG14724@linux.intel.com> <20200818145234.GC132200@linux.intel.com> <20200818150627.GD132200@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 18, 2020 at 11:15:32AM -0400, Nathaniel McCallum wrote: > That seems like overkill to me. I'm just asking for one additional mov > instruction. :) I started to consider eBPF since the complexity and constraints of the callback look like an overkill and without doubt will be a burden to maintain. /Jarkko