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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,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 AF708C433DF for ; Mon, 18 May 2020 12:14:51 +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 792CA20671 for ; Mon, 18 May 2020 12:14:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="tLJPzh+C" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 792CA20671 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=p/+c/TDbQE67nFBn1BglIG0SzIA2mhrlOfgsrX61Bw0=; b=tLJPzh+C0ZW2vE Uj77mta9RDKY/gx3XesSXuU3IzScBXh7q5N7ejLsQxiKK6+jRfZ4BwjCG+qJvfb84Y5fofZbjyCpx frWta+65isLNYPJIT32NGEPzdhR4LAul3JlYz74++8CROb8DcnQ/70Aihg91Ab3aWECMN27Ak3sVQ kfLwvjmqVrLF2z13errY4LkdZsPtRG/1+6DThupfQP4ZMOjd5lIriqEkd+KiThCBDv6PVQo0i8q0h QvWz3B7h/QFhCHxmdkb2Ucv3W9tm/WDrvL5tBedHq1OrN1SNC7ZmTX3OrsBi51RyEmdXbuEQkb8b6 i5tBlQ9sOyGgTTDG7d5A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jaefS-0003Md-QO; Mon, 18 May 2020 12:14:50 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jaefP-0003Ls-Gy for linux-arm-kernel@lists.infradead.org; Mon, 18 May 2020 12:14:48 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id DE3F6106F; Mon, 18 May 2020 05:14:46 -0700 (PDT) Received: from C02TD0UTHF1T.local (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2D4383F305; Mon, 18 May 2020 05:14:44 -0700 (PDT) Date: Mon, 18 May 2020 13:14:41 +0100 From: Mark Rutland To: Will Deacon Subject: Re: [PATCH 6/6] scs: Move DEFINE_SCS macro into core code Message-ID: <20200518121441.GE1957@C02TD0UTHF1T.local> References: <20200515172756.27185-1-will@kernel.org> <20200515172756.27185-7-will@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200515172756.27185-7-will@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200518_051447_606061_4B13C286 X-CRM114-Status: GOOD ( 15.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kees Cook , Jann Horn , Peter Zijlstra , Catalin Marinas , linux-kernel@vger.kernel.org, Mark Rutland , Sami Tolvanen , kernel-team@android.com, Ard Biesheuvel , 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 Fri, May 15, 2020 at 06:27:56PM +0100, Will Deacon wrote: > Defining static shadow call stacks is not architecture-specific, so move > the DEFINE_SCS() macro into the core header file. > > Signed-off-by: Will Deacon I think that we'll have to pull this back into arch code if/when we deal with VMAP'd stacks, so I'm not sure this is worthwhile given the diffstat is balanced. Mark. > --- > arch/arm64/kernel/scs.c | 4 ---- > include/linux/scs.h | 4 ++++ > 2 files changed, 4 insertions(+), 4 deletions(-) > > diff --git a/arch/arm64/kernel/scs.c b/arch/arm64/kernel/scs.c > index 955875dff9e1..e8f7ff45dd8f 100644 > --- a/arch/arm64/kernel/scs.c > +++ b/arch/arm64/kernel/scs.c > @@ -8,10 +8,6 @@ > #include > #include > > -/* Allocate a static per-CPU shadow stack */ > -#define DEFINE_SCS(name) \ > - DEFINE_PER_CPU(unsigned long [SCS_SIZE/sizeof(long)], name) \ > - > DEFINE_SCS(irq_shadow_call_stack); > > #ifdef CONFIG_ARM_SDE_INTERFACE > diff --git a/include/linux/scs.h b/include/linux/scs.h > index 2fd3df50e93e..6dec390cf154 100644 > --- a/include/linux/scs.h > +++ b/include/linux/scs.h > @@ -26,6 +26,10 @@ > /* An illegal pointer value to mark the end of the shadow stack. */ > #define SCS_END_MAGIC (0x5f6UL + POISON_POINTER_DELTA) > > +/* Allocate a static per-CPU shadow stack */ > +#define DEFINE_SCS(name) \ > + DEFINE_PER_CPU(unsigned long [SCS_SIZE/sizeof(long)], name) \ > + > #define task_scs(tsk) (task_thread_info(tsk)->scs_base) > #define task_scs_sp(tsk) (task_thread_info(tsk)->scs_sp) > > -- > 2.26.2.761.g0e0b3e54be-goog > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel