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 8F62EF3028A for ; Sun, 15 Mar 2026 22:03:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Subject:Cc:To:From:Message-ID:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=1pFeMB1yN/7QCjCjK/AKHA1tkI3GqiJdyjY5QXMSoRI=; b=Fy97hIsRtg8eYEZ4pkAiY1wPQ/ HeeS+7PQueRsNtAnN7tdjiZjGTQfhNmugDnpkzlPs0ZgVd+4H7HuOLI9iZPigc2olc5qsGjOoNu8U LaehHoZ4EbuQ4H3sos1an9GTl8wO8CSKz3iBce8NfPU93M1MExYZ+c0jLUYeqgLS15Q6iQ8hTHmaC Wp7QIxr5/tKxGaXLLvLQAcLyXMM3cQXG8AzY9BWbFXXDvHhdlVleqcMi8me/cSsF3q3LrwAa/nnbH n66shy/2eBeDHc/ulU4tO479BUaN8t9bJbtjm+zQvmQeF1mSNETnDzxXnvpDUgxOcU7KL6+wxGvOE dPhn0KqA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w1tY4-00000002xDU-1QB8; Sun, 15 Mar 2026 22:03:00 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w1tY3-00000002xDO-0aIP for linux-arm-kernel@lists.infradead.org; Sun, 15 Mar 2026 22:02:59 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id DE54261861; Sun, 15 Mar 2026 22:02:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3CA12C4CEF7; Sun, 15 Mar 2026 22:02:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773612177; bh=xoNLbFyQXyKwexXEM7eqwB7VzBkA8UkY9RaoUGKw8Sc=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=CZQmZ7RtuapIc74fVtCqQ9xl7Xl3glkU6sI9dOruPZitiHuuLIIXUi1prgvJbBC3z 8Awk69z0F2IdNClLAx5RsELDjycrHE9LdpIwWZdm4WISPpNU1h1zX8zEdROCaFucsw klsKZVTijTTKZxGd6/gRqhVDANwMTpmvCpic84nbMj641y9vnY0mHLMaOZCnvysPVm CfiW1II7AtBIyh6IWVaJknejOo2BgXL9+1TFzTWYYf/AUMA9chGcVZpLz5xVWgqxua n8Zez96SZd7/29q66ZeVGb1W0sHxNgffWCaJdVUlI/a1sJayq/o9aCPWPbel57LATL MQoEcIggQ13TQ== Received: from sofa.misterjones.org ([185.219.108.64] helo=lobster-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1w1tXy-00000002ElE-381F; Sun, 15 Mar 2026 22:02:54 +0000 Date: Sun, 15 Mar 2026 22:02:54 +0000 Message-ID: <87h5qgda41.wl-maz@kernel.org> From: Marc Zyngier To: David Laight Cc: Boqun Feng , Catalin Marinas , Ingo Molnar , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Lorenzo Pieralisi , Peter Zijlstra , Thomas Huth , Waiman Long , Will Deacon , Linus Torvalds Subject: Re: osq_lock on arm64 In-Reply-To: <20260315201153.1d2ae1e3@pumpkin> References: <20260315201153.1d2ae1e3@pumpkin> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: david.laight.linux@gmail.com, boqun@kernel.org, catalin.marinas@arm.com, mingo@redhat.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, lpieralisi@kernel.org, peterz@infradead.org, thuth@redhat.com, longman@redhat.com, will@kernel.org, torvalds@linux-foundation.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sun, 15 Mar 2026 20:11:53 +0000, David Laight wrote: [...] > The documentation I found for the arm64 instruction set doesn't mention that > losing the exclusive access requested by ldx will wake wfe, I assume that > is an omission from the docs? R_XRZRK explicitly calls for "The clearing of the global monitor for the PE." as a something that sets the event register, and therefore acts as a wake-up event from WFE. M. -- Jazz isn't dead. It just smells funny.