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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id DDFD3C433EF for ; Fri, 3 Dec 2021 10:15:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=+UkVpDBf7dPuNxOoGcRR2PhE0+g0pU5Hecz+qZ0u4xI=; b=d3ht8MBmIaOKJH 5+awSTNbGHUcVYWGDhOBSWfL3K3xjzD4eNjqDRM7+kToxMT5PdMiwtr/FMS2fwmaDG9SfJCJGmyjI 7u7ODGvlb70S16J9/H5oXqt1ZA2+fCT1vTIzqju7Azii+6g6X6NB3WQgo3jeN7e/ETa9WnBKI4R1t guz1RewzLu463bhB2jBrmgpE5nDSbRnMuO6n8rXrwLtVcdz2CcdZnjsqFkDQVVGEBBahkf/sy2F0q 5cIMMwiiWfHyKihdqjbEIfUIJxYD2V4Itb/onYDy+aK00+9ZTZbwQMaNyPxXkQWQZ6geA6UnIdomj vYnZJBxXxCt8MMos7J1w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mt5ZG-00F6Xw-0G; Fri, 03 Dec 2021 10:13:26 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mt5Vh-00F4lN-Mu for linux-arm-kernel@lists.infradead.org; Fri, 03 Dec 2021 10:09:47 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 463A0629F7; Fri, 3 Dec 2021 10:09:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 14265C53FD2; Fri, 3 Dec 2021 10:09:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638526184; bh=cXJPEakKRyBDuAsqUqn7QdskzGMvV+QiKgr5AZ9aOAc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IvehtDk4Zfaf827/ci4AZLy+Yi4yosDIFOb7pYOruQPhxDFvF8vZ9kRT8LHR5lyEq 91TyOkNm2G9zE3eI5gyYKSH+PkTM3rgKNFm7zOkie+06d1Oq5kW3V980wBCacZiZjU rkRNnf+5F7XnQvsrTKPYNc0BDjrH2dcFtdYwWL3dQY7ZO17M2M+KlLpQmrJgcEPS7G NlEEe9EWfY8BWnQUFL1SVUz51h3mAeRHzRnOUQdxKEvP2FvRldZZncRVoAA3KmXtzN bv9heDaZNhen+DYtQPyM8TEKvekqoOHR5nzpwebS71A1xhQsbrbEK28Z4mtfrfzmH+ z8Do5fGnIlOMA== From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org, linux@armlinux.org.uk Cc: Ard Biesheuvel , Nicolas Pitre , Arnd Bergmann , Kees Cook , Keith Packard , Linus Walleij , Nick Desaulniers , Tony Lindgren , Marc Zyngier , Vladimir Murzin , Jesse Taube Subject: [PATCH v3 11/14] ARM: use TLS register for 'current' on !SMP as well Date: Fri, 3 Dec 2021 11:09:00 +0100 Message-Id: <20211203100903.334206-12-ardb@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211203100903.334206-1-ardb@kernel.org> References: <20211203100903.334206-1-ardb@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=873; h=from:subject; bh=cXJPEakKRyBDuAsqUqn7QdskzGMvV+QiKgr5AZ9aOAc=; b=owEB7QES/pANAwAKAcNPIjmS2Y8kAcsmYgBhqey3V93Al9xEKrA90PzHU2L0wp/JYsJn0XppGK64 AoVtYr6JAbMEAAEKAB0WIQT72WJ8QGnJQhU3VynDTyI5ktmPJAUCYanstwAKCRDDTyI5ktmPJEekC/ 4/wSnBvzH9nklbFBe3Xx/xrTKKx88QZBTHwpaAjqB3J2eoB/2J1oAtRUdWGkd0pqcJ8a7LAUrfxbPu wSnn5hBEqsUNexO58fIBRseNI+22Qh++CRMXKvZQmH0O+N2OPEa+YtRLgcICJmf0Mw6ua3BKN+5Nze 9akHagHsywI3mlMMv0YW4Q9+oUoHZb25SnIB8l5VT5YMSAzltFdDmTSE0R7/ckca4kruXxzmfveAZg HlOKZBDeSZGO841fuRsLH+j7r8mn6sPfOG2qMzL4N0EuFU5vL3Z6S0rD/e62iUM2AYElF0M4sT+Ygu Xci79wcNyT6al/kMh9fv5GbLEqiWIlFiQ41d2g7Mv5etcIFkHrCkvLgilAZhziqyihaSwndG+m81Yp 7HfKJV6FncHMpXybs2SuPagwQAJyhGqFYKKFewPV65GLhd6bsOqcHofB5uzfGVvA6g0k8iS+dljlFY NTVBxztghhqwwS3/7IXFfYcQ4GkS0xPkhMzVMdiDXO4S8= X-Developer-Key: i=ardb@kernel.org; a=openpgp; fpr=F43D03328115A198C90016883D200E9CA6329909 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211203_020945_812981_E70007DC X-CRM114-Status: GOOD ( 14.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Enable the use of the TLS register to hold the 'current' pointer also on non-SMP configurations that target v6k or later CPUs. This will permit the use of THREAD_INFO_IN_TASK as well as IRQ stacks and vmap'ed stacks for such configurations. Acked-by: Linus Walleij Acked-by: Nicolas Pitre Acked-by: Arnd Bergmann Signed-off-by: Ard Biesheuvel --- arch/arm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index b0e403076227..5ad2151c43dd 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1154,7 +1154,7 @@ config SMP_ON_UP config CURRENT_POINTER_IN_TPIDRURO def_bool y - depends on SMP && CPU_32v6K && !CPU_V6 + depends on CPU_32v6K && !CPU_V6 config IRQSTACKS def_bool y -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel