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 503E2C433F5 for ; Fri, 26 Nov 2021 10:14:15 +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=Jvt6HxbjGKTz1Ua6A5wPRM9BVQEWDb/zZt1MVcKxAHw=; b=FV8ElKGPyunbzS EWXBITbkqNydx4aJ/4u1hbw5mfb497xRP3YUMDRGN7bcX9om28I5rGDPMdlLeJqDLNZhZuEdJ7obK ohDhcyW3T46j73hCcq0sg7y94FHYBhG7h9aYCAVmA/YuOOrC6LPsZu+r+EBsfoZqaAbesWK6c3L1V 77QOpUNKXE/X1/z97kvLvnTq1Q83kRkPZRR2bnhF7X06TgstnkVCxrAMxKed4G8aKEEgg7u5kdu82 djEz4gLC0e7m44u4dmQeUf5/Z7OEAZeb0UXVG0c41ymHDGWFLbWbrv8PRpGA0+DEk0CPH4tH/02r8 WWVldem/TguoI8M48Ypg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqYDU-009uYc-J1; Fri, 26 Nov 2021 10:12:28 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqYBa-009tk1-4Y for linux-arm-kernel@lists.infradead.org; Fri, 26 Nov 2021 10:10:31 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 273F66112F; Fri, 26 Nov 2021 10:10:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1637921429; bh=FSRr9iAMd8gZ194mXwvIzKLv7+dGKSKycnRxBi02xwk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gYLooF30LUOh4yCXcvf6mudanzqTAwdtm0GvFu3c6dbe0cDtn2NJ4eOcqjocX6Cq6 wx3zFg3ZpVpm9N0hGwtDfzO1QthsX9Fo73YIfmHvShSM+YbFNBKJZuaePQLIcvxlal RSOJz/3ajCePSCWWN6+RUDuINaHi3WlZh5RJO4Y4oqMNhxZD5yNfxaIgopCEefhiSL r5PV40UPq1EsTUMoNiXg0iMsWm0BkUwGpASEgh7rtX+OQndvEgjdivJL8wbovVbQOd DHRFLU1NqAgak5g0haELWQsx97Wbbgln0RXU44E/LH4FAltOtYIXV84cYfiOnlsFIJ 5SRI3FM0CaLdA== From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org Cc: Ard Biesheuvel , Russell King , Nicolas Pitre , Arnd Bergmann , Kees Cook , Keith Packard , Linus Walleij , Nick Desaulniers , Tony Lindgren Subject: [RFC PATCH 5/6] ARM: use TLS register for 'current' on !SMP as well Date: Fri, 26 Nov 2021 11:10:05 +0100 Message-Id: <20211126101006.3410322-6-ardb@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211126101006.3410322-1-ardb@kernel.org> References: <20211126101006.3410322-1-ardb@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=736; h=from:subject; bh=FSRr9iAMd8gZ194mXwvIzKLv7+dGKSKycnRxBi02xwk=; b=owEB7QES/pANAwAKAcNPIjmS2Y8kAcsmYgBhoLJ9B5c6EidQ7dVydFRzk3p1TV5G0jKk4OwocUpJ IMHhlFOJAbMEAAEKAB0WIQT72WJ8QGnJQhU3VynDTyI5ktmPJAUCYaCyfQAKCRDDTyI5ktmPJNJnC/ 0fPvpkCd/u6dbqahw8MCncN230yiRGvqDXNpcj1+fbUy2BiYn0T/tKFu79deB4If3DtoT0j4y0WTLI 1cGujgYHY2aUwzZd6H3hMy6a5o0qqMNV21Xe6dQxIhpHi+mpGIfmW8u0Nmflrqz02iWEI+opbS5OLP CFZap35f1ibdfN7mrJVO3qCuaEAQUmcSCuXxCIEupmCIyxiaZhcUygP/3rtCPzqWgHoA34wMgcSiWw U/mBleGE7pfPR3ShNodj/rsZadrY/2rapuRBe7DsCcNyCTODI2a/VdFHTw4Xtn4Cm4Td7KMzC/RSTR WmM7f37DoVLv6sfuGwRzUf9GEzm3HeK1PgrdswsCzfAR1En/TgHgt9oGPw/iwXasT4OPSQROP7UWvE MWvGXEq27BMIkOG3AqbEAUOmalE4NTkOGxAyiX3q+GhYo8iPZLho0ZNfAbKyT4gWTrKdJTn321P6Bs PKcUdok8cLAEa5lpBtNVOTeZvP70Is7t58AOzCHOG91dY= 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-20211126_021030_272418_2839F19A X-CRM114-Status: GOOD ( 12.03 ) 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. 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 e2ab72f2bf4a..61fc5cc03042 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1165,7 +1165,7 @@ 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