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 CC203C433EF for ; Tue, 30 Nov 2021 14:07:07 +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:Cc:To:Subject:Message-ID:Date:From: In-Reply-To:References:MIME-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=RBqv4RJHTb92e/B026N0srYrNtFjOjG8gY0JCHC7+mY=; b=QKGBgQrDJDZOxf opwjs+rD6xovK6cAmSWSVymegyBqMVqRdy0ZVWJk6uB2IsDqhkIQw1ZMMqwm0a9O8q3puUb/UE280 Rvtv6G/gY0xOI/SuuA7GIEQpm38EqK5t1+ntU3vVvVfRTqsi52Btuwvbwbbh0m12YoxEpfA34Yxe1 4mizOzxMC+kazEmgG173GoNvv+9Geyofta2TP8tLOsIjIp3lQnPKaLDeT49ZyqOQ4ygsDMLYx2PNa ROTxtL0yN+/rlxHVDp3gNpUjv92s8Xb2HqwT/Ndq/LWGeJAegkZ4aac8dkVUcGutKlKXXNC9COwQp aBOtCYAIho+jMn+2awMQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ms3lI-005To8-GX; Tue, 30 Nov 2021 14:05:36 +0000 Received: from mout.kundenserver.de ([212.227.126.131]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ms3lE-005TnL-Td for linux-arm-kernel@lists.infradead.org; Tue, 30 Nov 2021 14:05:34 +0000 Received: from mail-wr1-f46.google.com ([209.85.221.46]) by mrelayeu.kundenserver.de (mreue012 [213.165.67.97]) with ESMTPSA (Nemesis) id 1MQgtC-1nCUKS2D0o-00Ng7Q for ; Tue, 30 Nov 2021 15:05:30 +0100 Received: by mail-wr1-f46.google.com with SMTP id j3so44722504wrp.1 for ; Tue, 30 Nov 2021 06:05:30 -0800 (PST) X-Gm-Message-State: AOAM530tLihVCSo9SfutpKAtDYrjvqX6Y568D/H3i2zqPkbmCkmwUq3A SPtREDKh0l121yoUPb2udW7mwNpro+YhmDLTgtc= X-Google-Smtp-Source: ABdhPJzs2YLZHfKQIEb3xo4gv0b0FDh7jvLRfTNZoOnJw4u+8rdMRMZclBXphTqvp9sWGN1hmC/e8+P7/r9NMvXmJ7M= X-Received: by 2002:a5d:6886:: with SMTP id h6mr41760470wru.287.1638281130118; Tue, 30 Nov 2021 06:05:30 -0800 (PST) MIME-Version: 1.0 References: <20211130125901.3054-1-ardb@kernel.org> <20211130125901.3054-11-ardb@kernel.org> In-Reply-To: <20211130125901.3054-11-ardb@kernel.org> From: Arnd Bergmann Date: Tue, 30 Nov 2021 15:05:14 +0100 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v2 10/12] ARM: use TLS register for 'current' on !SMP as well To: Ard Biesheuvel Cc: Linux ARM , Russell King - ARM Linux , Nicolas Pitre , Arnd Bergmann , Kees Cook , Keith Packard , Linus Walleij , Nick Desaulniers , Tony Lindgren X-Provags-ID: V03:K1:10qRSTT1uI6NOH4EJwSP5okKB2HV35ILufdY/yX//TOlRHiGYxT oysZKceLnTuhmjZUgs99hiKWYLfDoFwaalGjKFCr3SGiqyz80U0Y0TttjS262cZRh6cy9sn 47GDLdHfgJKnwKh7ZOGc4R0veZgsFkQBSa23yup/R5fF6kykcDLZIPwu6TFtXBhEeibCvxK MKNVD/R7yG43F64XZ9DFw== X-UI-Out-Filterresults: notjunk:1;V03:K0:vKDIV0Vcm68=:Z4N6IbQnsolEWlWJY1TYPB izFDVb4gpBdlvFGA8l5ntwVsj8xQ5BGKh3gPTUcGRl3iUyR5TRCX4lj7exwZdReFdpdvspcF+ y4FxeefiUbhjYl5lA+IjT8Cl6jG8X8r2fA6qs81ke7F8PpsJ7vE46k9One80Cz9ctDCzCIFeg 0ey/1jLIvc86plkkK6OAUWqD1JMqtyocq3yFORC+AYsgags0rTr0Zi+57UDbYA0DF/bWgIuEh PtleHTDv31FAYuZQzw4Cd/Ep7CTHBJhnor1uI+/EpykwkJs8KgLU22MvDl8u7NUW35Ob22wVa olP/wia4wIti4eqpLD1vQvYyNa3fjr8eOnR48GCNVZgL6CYbOk7kfvfcyhwMS6FjVxHIYsBbr OSGSEzyrqqm9iW+o/3qLDLgVKqEIAQ8onzUVvQ04/ro3GrZ5x8pCN6jsLCKIbo/YzSi6Z/B8J CVrW99v5LntXlu/JaQBpgZzUPXRxNquqKW84I73ppLioK8IrDBe2fOJRwe+gXCwgA/tP2rBGy rFvLcfVI+w0w5XdAf2enDNh7DTbrMjG66rFIuVmVLk+GIx4xh4AsR/kGfZitkbxkkoqiPPZwC PXLTaFGbWQ1uBo73xF1K2wIS9CX/a54E9tPY8ybJCtrttynCWiedfJe8fG5++Bl54SmO0ARdR z/H15JRCBTkU1PIagpMIa1GVTQ+vH065MpZOFo11K12DTmGnHOgcYfZvcDtQlP4Yw0+12gLvo UK4jHrOWj8ONDrdDkiLAn+0Uob4OIgJZ0Iq6X0E+MmL9GHH6wtlndcgtExqyZX/vOuApIZRsV h/c5+DL5e0N0PsXE7ljt3ov5Cj0zm9+GdE/+Lw7YTyRUhC8n0A= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211130_060533_288952_E3401BFA X-CRM114-Status: GOOD ( 21.57 ) 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 On Tue, Nov 30, 2021 at 1:58 PM Ard Biesheuvel wrote: > > 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 > 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 Acked-by: Arnd Bergmann _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel