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=-0.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 CE990C04EB8 for ; Mon, 10 Dec 2018 20:30:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8F26A20672 for ; Mon, 10 Dec 2018 20:30:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8F26A20672 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729327AbeLJUai (ORCPT ); Mon, 10 Dec 2018 15:30:38 -0500 Received: from foss.arm.com ([217.140.101.70]:34138 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729057AbeLJUai (ORCPT ); Mon, 10 Dec 2018 15:30:38 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B0DEDEBD; Mon, 10 Dec 2018 12:30:37 -0800 (PST) Received: from [10.1.197.21] (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B7D433F59C; Mon, 10 Dec 2018 12:30:34 -0800 (PST) Subject: Re: [PATCH v6 04/13] arm64/kvm: hide ptrauth from guests To: Richard Henderson Cc: linux-arm-kernel@lists.infradead.org, Adam Wallis , Amit Kachhap , Andrew Jones , Ard Biesheuvel , Catalin Marinas , Christoffer Dall , Cyrill Gorcunov , Dave P Martin , Jacob Bramley , Kees Cook , Marc Zyngier , Mark Rutland , Ramana Radhakrishnan , Suzuki K Poulose , Will Deacon , kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org References: <20181207183931.4285-1-kristina.martsenko@arm.com> <20181207183931.4285-5-kristina.martsenko@arm.com> <57966497-d21c-5439-e4ba-d75f5552282f@linaro.org> <1f179017-4237-0d36-7adc-0a1470b5fd46@linaro.org> From: Kristina Martsenko Message-ID: <60a6ca4b-cfe9-1ed3-dce6-9f58575240ba@arm.com> Date: Mon, 10 Dec 2018 20:30:33 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.0 MIME-Version: 1.0 In-Reply-To: <1f179017-4237-0d36-7adc-0a1470b5fd46@linaro.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/12/2018 20:22, Richard Henderson wrote: > On 12/10/18 2:12 PM, Kristina Martsenko wrote: >> The plan was to disable trapping, yes. However, after that thread there >> was a retrospective change applied to the architecture, such that the >> XPACLRI (and XPACD/XPACI) instructions are no longer trapped by >> HCR_EL2.API. (The public documentation on this has not been updated >> yet.) This means that no HINT-space instructions should trap anymore. > > Ah, thanks for the update. I'll update my QEMU patch set. > >>> It seems like the header comment here, and >> Sorry, which header comment? > > Sorry, the patch commit message. Ah ok. Still seems correct. Kristina