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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 270D6C433EF for ; Fri, 3 Dec 2021 10:33:09 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.237288.411519 (Exim 4.92) (envelope-from ) id 1mt5s1-0001We-Na; Fri, 03 Dec 2021 10:32:49 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 237288.411519; Fri, 03 Dec 2021 10:32:49 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mt5s1-0001WX-KU; Fri, 03 Dec 2021 10:32:49 +0000 Received: by outflank-mailman (input) for mailman id 237288; Fri, 03 Dec 2021 10:32:48 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mt5s0-0001WR-Az for xen-devel@lists.xenproject.org; Fri, 03 Dec 2021 10:32:48 +0000 Received: from sender4-of-o51.zoho.com (sender4-of-o51.zoho.com [136.143.188.51]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 5a0e6c18-5424-11ec-b1df-f38ee3fbfdf7; Fri, 03 Dec 2021 11:32:46 +0100 (CET) Received: from [10.10.1.128] (static-72-81-132-2.bltmmd.fios.verizon.net [72.81.132.2]) by mx.zohomail.com with SMTPS id 1638527558682794.7941430149524; Fri, 3 Dec 2021 02:32:38 -0800 (PST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 5a0e6c18-5424-11ec-b1df-f38ee3fbfdf7 ARC-Seal: i=1; a=rsa-sha256; t=1638527561; cv=none; d=zohomail.com; s=zohoarc; b=JkIDVH9Wb5ZqmknRJlkR+8Zg8NnpOByef3lHBO2BGy0eqSo56/n/iz3BQcYVLKRbC24uFwmqs5i/lGFRPXA9hHuTPvTlI+K3pYq/BngWxNnMp2jhMN7wTVsU24Ss1sv2CBcTehhUZFuQ3lOyyfvzMnriyGeD7Ix6ssXqZG4Q9gQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1638527561; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To; bh=IzlS3kgJSrMonzIiyfZ3uL8xyz5tf3DhYMDDDegUafc=; b=WG3rCzIG0xVLE8NFBJDznm8Cei07od5chXBKQvsgJCx8Fpu1WOP9YoNNFm3/m6cByANtiibv2He+p2x3y9w3eHWKOKwdl7L0hTnG9M8cghpcwHIrP+jdhzUe7DGk8CWP+HhEfXeV+rXTWQlJbpqscsVy0Ld58FJ8AcFCcTg4I0s= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=apertussolutions.com; spf=pass smtp.mailfrom=dpsmith@apertussolutions.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1638527561; s=zoho; d=apertussolutions.com; i=dpsmith@apertussolutions.com; h=Subject:To:Cc:References:From:Message-ID:Date:MIME-Version:In-Reply-To:Content-Type:Content-Transfer-Encoding; bh=IzlS3kgJSrMonzIiyfZ3uL8xyz5tf3DhYMDDDegUafc=; b=n2LnPWEGyshLVRS+n8Vamedg21C/bviiQ8v6wdgoEv/A9DyFpIeNNDJUy6X0RaYM naSpEKrLDlpl1MhRg7zMZEDdwWHKDSeqDqoQN/QrtDmPn7YR01LFIatjiUAXcPglPJ5 JHdxt/d/Fo9IW4JWel5vgvS7LSedvN/8lxrhoNJc= Subject: Re: [PATCH 3/4] xen/xsm: Use __init_data_cf_clobber for xsm_ops To: Andrew Cooper , Xen-devel Cc: Daniel De Graaf , Jan Beulich , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= , Wei Liu References: <20211126212258.7550-1-andrew.cooper3@citrix.com> <20211126212258.7550-4-andrew.cooper3@citrix.com> From: "Daniel P. Smith" Message-ID: <17592382-02e2-7ba8-1d25-57d6451c3f5a@apertussolutions.com> Date: Fri, 3 Dec 2021 05:32:14 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 MIME-Version: 1.0 In-Reply-To: <20211126212258.7550-4-andrew.cooper3@citrix.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-ZohoMailClient: External On 11/26/21 4:22 PM, Andrew Cooper wrote: > All calls through xsm_ops are fully altcall'd. Harden all fnptr targets. > > This yields: > > (XEN) altcall: Optimised away 197 endbr64 instructions > > of 1655 on an everything-enabled build of Xen, which is ~12%. > > Signed-off-by: Andrew Cooper Reviewed-by: Daniel P. Smith