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 07BCFC433EF for ; Tue, 30 Nov 2021 13:04:50 +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=WNCOMlEl4s5gWMYnzaqRkH0+46Bs4xnIdg+OOACUseM=; b=i9GSWMq4U5Cjkn I2OQS18H34E7zCvW+yW3lP2aET4N8LimJLTSfu1/wCFHmWR+LeMtgDmN2btzmRaBiLXaMQT35BZsY 7QZP3Fin8vIv5Bw0/jLQL+ei9NKHRIkeXnUsLqI1iJPNXX5QgLOwwTCIWHxiBko/5RUsCQXQJBzqb 9s6jfb1OcLGMz7cGkHAdJj0nWiXF2Ef5RIXZBJx+evqdnlw3JNZjf4WyfLteDhCKzavFQ9cez9And 8nasSn6ga4gHmsK71kNr0GhNXX2MOkEM6xpbH2nSK1+ifyXvE8AkeeWuio90IR2q47/3yGhWYPPFW v1ncCig/jddmLsg8MkwA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ms2mt-005E2u-8M; Tue, 30 Nov 2021 13:03:11 +0000 Received: from sin.source.kernel.org ([145.40.73.55]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ms2jT-005CSz-Pk for linux-arm-kernel@lists.infradead.org; Tue, 30 Nov 2021 12:59:41 +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 sin.source.kernel.org (Postfix) with ESMTPS id 7F223CE19D7; Tue, 30 Nov 2021 12:59:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 98CBCC53FC7; Tue, 30 Nov 2021 12:59:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638277175; bh=30esx3ByQhbXIANjWe985chsoIDHZ4ucqwVO6IZ5zwY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LEaPIekH9cp1WgiQ/8opDw2LxY60tO4upwFJywO9ksYCAD1nRe0HyrJ3ZIBPYjNF4 v2mS9WFsiRrRvf1S92muNsl1BkqF1cDDzC6weWd3WRC55/TJgJ7LbXAm7R4M6jwzVi 2xQ+K0HKRMPb30PG5couzaLo8gKduEgSt0mTF7QpOJVSKS9B0s6O67fDE52Ub7qVpw sBKbCnJFDZTJYRn4iyD4JlLVxBs7MMhsINPnEGOryYs5atqs4a3yGDbwxwTbly7xM5 9pyesSFTw8SryUVxcxE/ed6NJlQHpKNTMy3e2fv6tC1ZlWGpWgwqhOVkVu121R+ISk CKDoOhTsAfb9g== 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 Subject: [PATCH v2 10/12] ARM: use TLS register for 'current' on !SMP as well Date: Tue, 30 Nov 2021 13:58:59 +0100 Message-Id: <20211130125901.3054-11-ardb@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211130125901.3054-1-ardb@kernel.org> References: <20211130125901.3054-1-ardb@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=832; h=from:subject; bh=30esx3ByQhbXIANjWe985chsoIDHZ4ucqwVO6IZ5zwY=; b=owEB7QES/pANAwAKAcNPIjmS2Y8kAcsmYgBhpiASjECv43HCm5HDkF4pveuoy8GQhOiTypCr6ktq RKa0qzqJAbMEAAEKAB0WIQT72WJ8QGnJQhU3VynDTyI5ktmPJAUCYaYgEgAKCRDDTyI5ktmPJGZXC/ 9dznlHTP0xVjvch4dq6a+Sh2i8eZjJM1IUCGdz48gm56bmnCw9VQIU1P7o6KG8NLESsY3bceXLTyo7 zeBTGfW85ogE2P/S3HFmEXCr3gAqTLwGGtShJEQD8PQFKavxbve05ltz4CGh7lD0lrQvGrAmrW4d8d it5kAaGQqtxeMDonWPKaNMo6GSbQqH5K7LJQ3Tduq9Ubkp51n5DtHODAOof3MCdcSGQIqsp9fqc7sw UYcehs5sunz5lPBUi3sCA9HIesbQVKb6wh/lKb0nh4Gs2U3vnyUCmNlEy8Wmx6UI0fH2FjAB0YKU2E ZKIMeL32r5ljrxgyw76aDX4eUprfKxjcyLG9oI/YL17KqDcOPL1+O+ev8JCOqpg4g8GWkUHVpfsPid c6e2scCOC7t5PfOfyg9F8584izUiQKzMMloLbf97NPG4tK/nz95mlO+O0i+GQieJSDcIDCCrIt5AQj r3wGDFCIikNIyfI9U29DBxSk/uaPth/nq/bW4634brDJg= 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-20211130_045940_046493_DABFDFB5 X-CRM114-Status: GOOD ( 15.20 ) 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 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