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=-9.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 1BED6C2D0DC for ; Thu, 2 Jan 2020 17:24:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E3D0F206E6 for ; Thu, 2 Jan 2020 17:24:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="t7xqOm6O" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727920AbgABRY0 (ORCPT ); Thu, 2 Jan 2020 12:24:26 -0500 Received: from mail-wr1-f65.google.com ([209.85.221.65]:42307 "EHLO mail-wr1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727692AbgABRYU (ORCPT ); Thu, 2 Jan 2020 12:24:20 -0500 Received: by mail-wr1-f65.google.com with SMTP id q6so39885991wro.9; Thu, 02 Jan 2020 09:24:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=iynuWkDBVTaiEzHNP7sxuTkwJnSTns6zopxJWRhFfwM=; b=t7xqOm6OFo39bFTfx2QgOe5P+nWEAEOUff1YJ0pwLEf6Fv1AZqBvjPowdPWbEO6KoE Z/9uqLpZ0LzZIHVqJdI3giZkl0gpTCdkocT04PmvIu3PBgyLagUCnjv8kczWyoppCDIb c+NcxYZMBC+gUNbOk83IsiTHaC/tQCl5z1POP8n+zKVYYQhHZMeRKB9wA0qZH/BOmGuO 6f/ycMdHuWvmwKljtf3dL3ThfirhWgPclMEjQIVSrR/x+EB+tMFBtxl8HMCyBqFzMh3m qIMRPCxHGm/bcYwCdocfZnXu1WaNpkCBc0ZTiDueiQ4IL3xgm0F28WsImiKxy6Bappvr O7gg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=iynuWkDBVTaiEzHNP7sxuTkwJnSTns6zopxJWRhFfwM=; b=idwZSWrxhbUNDzNF+WsR46ElZHzBSrFJ+E27qM29DPnWqjOyGG7kWWK8r5c76XF4i1 FBhdJvL94cIkzTejVqau0xmSh7TgughoPXfbzj2AqFPjpGnNnVVgvndKKV4fzPX/Tl/E IEbK3SMxnS9JUJnmfoH/WUFVVEY/fqIKd5XbQkCC+0UoS6hIUYJ51xJQG7ebxb/NzehJ hewBxYr9FsLT1qEdfuEnmmEFWl1B/0D4AL8EZ8s9vUCl0x4DsEr5dH/42IRFdhajiXQK BE6U93c5ezaZ+umed7V+LhhvTmPL4DoBoDn9WNUTrzf/9NxCqb/RybXX6FrOGJmiILLy gghw== X-Gm-Message-State: APjAAAUBFKfgjAB3eFl7JaeRzEBVJGLj5BUvXVz62q2gaO1fZDWgUW8Y VGQhTVspjSDqojGk7+1MVDrRf2c8uTE3xp6W X-Google-Smtp-Source: APXvYqyGvFmZbRqFUgjsGsKZXKYs8CPJrTsut+rS8ZrZ5qhYlWYH9pC/PaHj2Q9P1tF2BhjHeQQ/qg== X-Received: by 2002:adf:f484:: with SMTP id l4mr83117692wro.207.1577985858109; Thu, 02 Jan 2020 09:24:18 -0800 (PST) Received: from amanieu-laptop.home ([2a01:cb19:8051:6200:3fe7:84:7f3:e713]) by smtp.gmail.com with ESMTPSA id z21sm9480328wml.5.2020.01.02.09.24.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Jan 2020 09:24:17 -0800 (PST) From: Amanieu d'Antras To: linux-kernel@vger.kernel.org Cc: Christian Brauner , stable@vger.kernel.org, Amanieu d'Antras , linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/7] arm64: Implement copy_thread_tls Date: Thu, 2 Jan 2020 18:24:08 +0100 Message-Id: <20200102172413.654385-3-amanieu@gmail.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200102172413.654385-1-amanieu@gmail.com> References: <20200102172413.654385-1-amanieu@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- arch/arm64/Kconfig | 1 + arch/arm64/kernel/process.c | 10 +++++----- 2 files changed, 6 insertions(+), 5 deletions(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index b1b4476ddb83..e688dfad0b72 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -138,6 +138,7 @@ config ARM64 select HAVE_CMPXCHG_DOUBLE select HAVE_CMPXCHG_LOCAL select HAVE_CONTEXT_TRACKING + select HAVE_COPY_THREAD_TLS select HAVE_DEBUG_BUGVERBOSE select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 71f788cd2b18..d54586d5b031 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -360,8 +360,8 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) 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) +int copy_thread_tls(unsigned long clone_flags, unsigned long stack_start, + unsigned long stk_sz, struct task_struct *p, unsigned long tls) { struct pt_regs *childregs = task_pt_regs(p); @@ -394,11 +394,11 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start, } /* - * If a TLS pointer was passed to clone (4th argument), use it - * for the new thread. + * If a TLS pointer was passed to clone, use it for the new + * thread. */ if (clone_flags & CLONE_SETTLS) - p->thread.uw.tp_value = childregs->regs[3]; + p->thread.uw.tp_value = tls; } else { memset(childregs, 0, sizeof(struct pt_regs)); childregs->pstate = PSR_MODE_EL1h; -- 2.24.1