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 ED170C4332F for ; Fri, 4 Nov 2022 23:58:33 +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=yEAlbe+KmGC/3mxZJIt1aY8TcTigvQI4jlqLuaCyqaQ=; b=wG4lthBY4CafR8 /bm2Cvc3/yiiXLpkNMI3+s7YY+acoJCxlHH3Ox02r/UAOQeBqOF+tnwg8MuJTDbYucIxHFP2xnIbw tLjcRRPoYmet1jC2fqSUH28KtTGAd+nkT9Ra1TQuCR/3DWYyI5F9aal4Fv28TpzVdqLogPoLhS0EF QKso9VWG7BUSL2UrG5iGCm9jzEXxIC07IfEbjTjaxjcEovM8bBCi+fQ8uDKQjk4Nhy2bVIiLFE9wf f6zAaXA0hFzu+LsiWjHxup9jpabAzjcg6PCs1Cc4RdqVgpRm9tpOEs4naGUyYIvO19j5cnm5ATWpE n8QZmg4HBFBAgFrhuSCA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1or6Yz-005Xik-QG; Fri, 04 Nov 2022 23:57:30 +0000 Received: from ams.source.kernel.org ([2604:1380:4601:e00::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1or6X1-005Whe-Dt for linux-arm-kernel@lists.infradead.org; Fri, 04 Nov 2022 23:55:28 +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 30C74B8303B; Fri, 4 Nov 2022 23:55:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EB7FEC433B5; Fri, 4 Nov 2022 23:55:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1667606124; bh=+NVFCTyJuWgWhfk7IiCFzEfucuu4btZq02TRL41xj7s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CRLE1YhsIBhxjq7L+x85Z/eIXAMHvlR7P/NIUlPBcOzFvfPpiAAWtsc3OgVyV0hv/ faF4DHLbw/CA9qggeO2/O2x4UuglbOYsIApUieegpdjKfbfUwWpxJagXw7ZTHzg4vo nwsdn5lEslX/BXpR95MO1do90zyH88F912XHmtiOg8FGTwiY3MgCDFpfi6O4EsPJyY Wil8V0WwjR2YrdNfWemU0wMR+XJQeopu/U4q4+3xNdSHe6LHu+jB3C7Mx5g4xol3vY DbpYgTPqFH2CwHOU4Yx/AQIAbQnix+bbvFC00pizqtdQy0u9uNUTDWsdWjnw/SF3C9 Egwbmp3RVxxDw== From: Mark Brown To: Catalin Marinas , Will Deacon , Marc Zyngier Cc: Lorenzo Pieralisi , Mark Rutland , Sami Mujawar , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Mark Brown Subject: [PATCH v1 10/18] arm64/mm: Disable all interrupts while replacing TTBR1 Date: Fri, 4 Nov 2022 23:54:45 +0000 Message-Id: <20221104235453.870573-11-broonie@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221104235453.870573-1-broonie@kernel.org> References: <20221104235453.870573-1-broonie@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=845; i=broonie@kernel.org; h=from:subject; bh=+NVFCTyJuWgWhfk7IiCFzEfucuu4btZq02TRL41xj7s=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBjZaZEZxZv0XqexANtjVZStvoXksQKHXPMwqYgIw+X NaeCsw+JATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCY2WmRAAKCRAk1otyXVSH0MmRB/ 4/Q/2k6hnq147xwu1kerH0IWNcv2GlGPLnpQWaQWz876rczSCHVkNsgCSSl+Vrza2T02gQ08iG04B0 iT8GTyNX9/ycRd8YnjD/16BSvHNRaf8bYYOK/HitOOiH5nUo08pvt55ihBMcMOfRZZyrufn0YcP+sh KeFk59dfBU04RBaoze+9Azw67SONsd3pyXcmLaJ4VTt4Ms3dVAaYSXT0fVXqQXmDw8yNBFJ1WKQx7x y0hSMj0KZiOd185v3x1QXwtCXgYY2hzvTn1uidd/rA/qQ9rlczmdVS921q02g6uF2ipu0GHjfHh228 KD35PQKJ92T077jUlRm87ORcODHkEQ X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221104_165527_621873_AB708401 X-CRM114-Status: GOOD ( 10.11 ) 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 We really don't want any exceptions to be delivered while manipulating TTBR1 so disable ALLINT as well as DAIF in idmap_cpu_replace_ttbr1(), preventing delivery of NMIs while the replacement is in progress. Signed-off-by: Mark Brown --- arch/arm64/mm/proc.S | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index b9ecbbae1e1a..6bc90fc85d34 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -190,6 +190,7 @@ SYM_FUNC_END(cpu_do_resume) */ SYM_TYPED_FUNC_START(idmap_cpu_replace_ttbr1) save_and_disable_daif flags=x2 + disable_allint __idmap_cpu_set_reserved_ttbr1 x1, x3 @@ -197,6 +198,7 @@ SYM_TYPED_FUNC_START(idmap_cpu_replace_ttbr1) msr ttbr1_el1, x0 isb + enable_allint restore_daif x2 ret -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel