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 BD56CC433F5 for ; Mon, 6 Dec 2021 16:58:38 +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=vfxBaEhP31DSPtaYlR3lOrnmLrYOOQP82NZMHdLLe7I=; b=mMcsKKUDgtlpTf hJZxjBhvZYPNYii59iQ1XCb+sm6BJTfrLp5EL2Ljoso5W9fFHB5I2cLgDfm2KwxohPS2xqdT9+Y9w 8D7lV7uIT4aEU5uf/4p+OkhezV+LFkTeXDT2CBcaKRI3Pz/k+23PP6f4hQs1Aijsbzq1DaXejLUg0 5ngnvVovB/RAZTa2bbgETp8HNE+7JnMXg2xpTpGCFq2kBVVCOhMaCrb6XsLrwrVjw16O/Dj0ySPjx RDUOtCrwuKRwcXyCdTXAS9Cldsb5aNjoQLj4CcXzyntZ9tYfKNemIqnPOCt1nZ1sTp4FzB7YraY1n 26YX6EfUU91oL7LivVPw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1muHHc-004uI3-Ue; Mon, 06 Dec 2021 16:56:09 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1muH9i-004qop-7V for linux-arm-kernel@lists.infradead.org; Mon, 06 Dec 2021 16:47:59 +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 ams.source.kernel.org (Postfix) with ESMTPS id E2617B81178; Mon, 6 Dec 2021 16:47:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 15465C341CB; Mon, 6 Dec 2021 16:47:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638809275; bh=TrcfHKzrwuOZnOabXBK7zTRxbliDpdnplO74ydh0uWk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SahGN+gY355SrsADAvqsrG2NHzwhjhRJx6fG/0qzwrLge6tvNpBfGOzMJ0eViIUgT 0xLznGveMPIuKtbYRYPUPrLizi1kPZCALSzen+dsw0dZw+MUNI7PBGmlGFQNy6nx8Q fGpKaGcBCO3rIEf8EM6TyqZi3CG/SNk24LlMMnX5RK3ogXfVtHxiaoGrK+jrMpNX4a B9L19dQ5XC+b/GBW/9LcFpN20o7lu1FP99MXOHKgxYejRhELTAKB/QGDDU7mBmZEkW VDHte/qb1bBUyCwKP7AGkxXnvfu7qSOfS2fztHI5yBwMYcwzc0XOgF45oL+eL4ScBS czyr1mcxYszbw== 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 v4 12/15] ARM: use TLS register for 'current' on !SMP as well Date: Mon, 6 Dec 2021 17:46:56 +0100 Message-Id: <20211206164659.1495084-13-ardb@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211206164659.1495084-1-ardb@kernel.org> References: <20211206164659.1495084-1-ardb@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=978; h=from:subject; bh=TrcfHKzrwuOZnOabXBK7zTRxbliDpdnplO74ydh0uWk=; b=owEB7QES/pANAwAKAcNPIjmS2Y8kAcsmYgBhrj58Z/7+BnWqcRfyPWa7lvrd3ERYfmdpw6eK+Qe1 cxPcBneJAbMEAAEKAB0WIQT72WJ8QGnJQhU3VynDTyI5ktmPJAUCYa4+fAAKCRDDTyI5ktmPJLMIDA CO5RJrP7hi0SDiBq2RKj8LsFQkfLnNfb0nlRAvtk2oNE1fGbx34i6YC36Hw6kdAlImlpzsB8ylO5gZ v3iU8XQ7nYFdv2SF6TDAneElHaW/CPULtYHDm7wdrhfvZc60t8pRHrwPohAnch24KIKiLFmbm1zH58 u2htwLciB4/RtEhkRm0J+QyZoBnV7LpAxNwUsKFS/gfnKWJbwSPozE7inXnOgpWysDP24qRQdkrxpE WKLMdT+qIprjB71fTCDE2XEg5tfMZRW6Wt/ZsuVnKQZ6QoQgels8ahHRQ/P+H1wb/GL8ZUAT2VeI1k 0sd0dQJ9tOLFhqNCRa+BBBkqS4oTveH+3VsCoXB+JL+MrlPMb3V82vruyAnGMG0e3LeW5VulR2ozlA MGabf0ND8klst41l+l+5PtlwxD43rDUxuNAntFMRs3Pbh/RQy8JomYUv61dQbA/fuFxRYyFKB5yjEh x5ijgsp20B9KbPl4tJMYOFpWVhjfDs85XfmdbGwn4CePw= 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-20211206_084758_442152_6C488525 X-CRM114-Status: GOOD ( 13.95 ) 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 Tested-by: Marc Zyngier Tested-by: Vladimir Murzin # ARMv7M --- 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