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=-8.3 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,USER_AGENT_SANE_1 autolearn=unavailable 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 A805BC2D0C2 for ; Thu, 2 Jan 2020 18:03:02 +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 7E5F420866 for ; Thu, 2 Jan 2020 18:03:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="lopTwPRz" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7E5F420866 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ubuntu.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=5abQjFyxd4dbd9Z/HyEWwMOunciQz4vBFLkreSUphQM=; b=lopTwPRzN56My7 Np2vQssI3+VGCczD89RSc4BENpNKPZDCDa6/jZTZp+YxDtmX9JarvXeVQxl13wCl4d1G7KduXvC9O ENV+urlHgFKuvTedmJwfmULNPJamnSYGkZ0k4HsD8e7enrssyx64oOKkuCRajR/i1p72SNxv9GKPx Yn61FZMvxGBDGUjiNYhJxjpUViLjQzMou1EOzI54EAe25b9EgYWorrpTrBXGOpm7z1eXqkkv7O09z z+WgEDM+cfLjw1IHJYYJShvuenyTKrYW+wRL37DUcWf9ejoC8UwHezvKfUQLCG80uFaF6M/2/NMFl buzblV5NesSBA71YTJQw==; 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 1in4oD-0008Fr-6X; Thu, 02 Jan 2020 18:02:57 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1in4oA-0008F1-1q for linux-arm-kernel@lists.infradead.org; Thu, 02 Jan 2020 18:02:55 +0000 Received: from [172.58.107.60] (helo=wittgenstein) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1in4o4-0007SY-A3; Thu, 02 Jan 2020 18:02:49 +0000 Date: Thu, 2 Jan 2020 19:02:43 +0100 From: Christian Brauner To: Amanieu d'Antras , will.deacon@arm.com Subject: Re: [PATCH 3/7] arm: Implement copy_thread_tls Message-ID: <20200102180241.ialbcdhaikqltkfm@wittgenstein> References: <20200102172413.654385-1-amanieu@gmail.com> <20200102172413.654385-4-amanieu@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200102172413.654385-4-amanieu@gmail.com> User-Agent: NeoMutt/20180716 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200102_100254_225467_9B2C7DC5 X-CRM114-Status: GOOD ( 14.73 ) 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: linux-arm-kernel@lists.infradead.org, stable@vger.kernel.org, linux-kernel@vger.kernel.org, Christian Brauner 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, Jan 02, 2020 at 06:24:09PM +0100, Amanieu d'Antras wrote: > This is required for clone3 which passes the TLS value through a > struct rather than a register. > > Signed-off-by: Amanieu d'Antras > Cc: linux-arm-kernel@lists.infradead.org > Cc: # 5.3.x Again, looks good to me but I'd like an ack from someone closer to the architecture itself. Acked-by: Christian Brauner > --- > arch/arm/Kconfig | 1 + > arch/arm/kernel/process.c | 6 +++--- > 2 files changed, 4 insertions(+), 3 deletions(-) > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > index ba75e3661a41..96dab76da3b3 100644 > --- a/arch/arm/Kconfig > +++ b/arch/arm/Kconfig > @@ -72,6 +72,7 @@ config ARM > select HAVE_ARM_SMCCC if CPU_V7 > select HAVE_EBPF_JIT if !CPU_ENDIAN_BE32 > select HAVE_CONTEXT_TRACKING > + select HAVE_COPY_THREAD_TLS > select HAVE_C_RECORDMCOUNT > select HAVE_DEBUG_KMEMLEAK > select HAVE_DMA_CONTIGUOUS if MMU > diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c > index cea1c27c29cb..46e478fb5ea2 100644 > --- a/arch/arm/kernel/process.c > +++ b/arch/arm/kernel/process.c > @@ -226,8 +226,8 @@ void release_thread(struct task_struct *dead_task) > asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); > > int > -copy_thread(unsigned long clone_flags, unsigned long stack_start, > - unsigned long stk_sz, struct task_struct *p) > +copy_thread_tls(unsigned long clone_flags, unsigned long stack_start, > + unsigned long stk_sz, struct task_struct *p, unsigned long tls) > { > struct thread_info *thread = task_thread_info(p); > struct pt_regs *childregs = task_pt_regs(p); > @@ -261,7 +261,7 @@ copy_thread(unsigned long clone_flags, unsigned long stack_start, > clear_ptrace_hw_breakpoint(p); > > if (clone_flags & CLONE_SETTLS) > - thread->tp_value[0] = childregs->ARM_r3; > + thread->tp_value[0] = tls; > thread->tp_value[1] = get_tpuser(); > > thread_notify(THREAD_NOTIFY_COPY, thread); > -- > 2.24.1 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel