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=-5.5 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,URIBL_BLOCKED,USER_AGENT_MUTT 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 05DE9C04AB5 for ; Thu, 6 Jun 2019 17:24:01 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D40132083D for ; Thu, 6 Jun 2019 17:24:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="kIcMXxdX" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D40132083D 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-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=9VIzOmGXioN6oXurtUqWeGsjFAZL0uwDHk4/IVeiDfA=; b=kIcMXxdXVjgbjf io8sqIy45ijz+KgTYKFVQzf3FnER4UnpAkbABY1APU2lm+jVjTl+JjYvUrKUBLoD7KjFk2xt+QRj3 j9dSqnuYn+iQNGfmYoDc82xcIA5A+hzLlZKkGxF7DBMDRnvLDpWd0sRClkmxGSRM+SaVWJYy9TO+O bWqtjYfIiz9jWQ/pmNogyiQrIdZDzA58Oyl56fe2lAxz2Dd/F+P+pEGyP/s17Kn46s9iq8zcqJR8K 3yJQBUtRkmnkZePGPaunZ2X9NiN42jv0g7+2FSFlN5pWaOxejZUEs8hLc9iO/FYRYq91KJ5YajOYR dRCZUn/tKsPLnFCcoBOA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hYw7G-0000e5-Ia; Thu, 06 Jun 2019 17:23:54 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hYw7D-0000dK-B2 for linux-arm-kernel@lists.infradead.org; Thu, 06 Jun 2019 17:23:52 +0000 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 B5E54374; Thu, 6 Jun 2019 10:23:50 -0700 (PDT) Received: from e103592.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 372DE3F690; Thu, 6 Jun 2019 10:23:48 -0700 (PDT) Date: Thu, 6 Jun 2019 18:23:45 +0100 From: Dave Martin To: Catalin Marinas Subject: Re: [PATCH 4/8] arm64: Basic Branch Target Identification support Message-ID: <20190606172345.GD28398@e103592.cambridge.arm.com> References: <1558693533-13465-1-git-send-email-Dave.Martin@arm.com> <1558693533-13465-5-git-send-email-Dave.Martin@arm.com> <20190524130217.GA15566@lakrids.cambridge.arm.com> <20190524145306.GZ28398@e103592.cambridge.arm.com> <20190606171155.GI56860@arrakis.emea.arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190606171155.GI56860@arrakis.emea.arm.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190606_102351_381931_3170FDC8 X-CRM114-Status: GOOD ( 19.79 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , linux-arch@vger.kernel.org, Yu-cheng Yu , Arnd Bergmann , Paul Elliott , "H.J. Lu" , Szabolcs Nagy , Will Deacon , Richard Henderson , Andrew Jones , Kristina =?utf-8?Q?Mart=C5=A1enko?= , linux-kernel@vger.kernel.org, Sudakshina Das , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jun 06, 2019 at 06:11:56PM +0100, Catalin Marinas wrote: > On Fri, May 24, 2019 at 03:53:06PM +0100, Dave P Martin wrote: > > On Fri, May 24, 2019 at 02:02:17PM +0100, Mark Rutland wrote: > > > On Fri, May 24, 2019 at 11:25:29AM +0100, Dave Martin wrote: > > > > #endif /* _UAPI__ASM_HWCAP_H */ > > > > diff --git a/arch/arm64/include/uapi/asm/mman.h b/arch/arm64/include/uapi/asm/mman.h > > > > new file mode 100644 > > > > index 0000000..4776b43 > > > > --- /dev/null > > > > +++ b/arch/arm64/include/uapi/asm/mman.h > > > > @@ -0,0 +1,9 @@ > > > > +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ > > > > +#ifndef _UAPI__ASM_MMAN_H > > > > +#define _UAPI__ASM_MMAN_H > > > > + > > > > +#include > > > > + > > > > +#define PROT_BTI_GUARDED 0x10 /* BTI guarded page */ > > > > > > From prior discussions, I thought this would be PROT_BTI, without the > > > _GUARDED suffix. Do we really need that? > > > > > > AFAICT, all other PROT_* definitions only have a single underscore, and > > > the existing arch-specific flags are PROT_ADI on sparc, and PROT_SAO on > > > powerpc. > > > > No strong opinon. I was trying to make the name less obscure, but I'm > > equally happy with PROT_BTI if people prefer that. > > I prefer PROT_BTI as well. We are going to add a PROT_MTE at some point > (and a VM_ARM64_MTE in the high VMA flag bits). Ack. Some things need attention, so I need to respin this series anyway. skip_faulting_instruction() and kprobes/uprobes may need looking at, plus I want to simply the ELF parsing (at least to skip some cost for arm64). Cheers ---Dave _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel