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 BB8EBCC6B34 for ; Thu, 15 Oct 2026 13:13:13 +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=jrD8iMQpGrXv+6P9BDKZqISE7Mm2HK9N4DXQXzF098U=; b=s/qLAVQlZu/iNi4cgYZEk+RhXv qhhn3uMPcir9yg++EGrPuo0jmjz2iKvtjw0/kLJDRbkMuRwYrwfyuLoxIpNGdfMcO3QM4ZbV3X46A I92PKfu3zhtbSxUF7IesfF3SFPDozdeLzCYm4FBkMRJi6xeUMx+qPtWIC8sCPUuk9dXX0o3yldvmk GXL0B1Q0Ua5EGQ7LHxIdJCQ2O51p3opdICDQ4xJtA0vJdSDP4oVLT4iKrNEZHBnkkE/NhmKHEgUiA RjI1K6Zap/dikY0+Wr+a33lGZnohLkFKv7MgPWs+MmwR86+jS6lYdvK1EqaW7LN62l8X0QbmPDFYO 4GV0p7+g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xHLGb-00000000Dy3-1ikV; Thu, 15 Oct 2026 13:13:05 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xHLGZ-00000000Dxr-48KP for linux-arm-kernel@lists.infradead.org; Thu, 15 Oct 2026 13:13:04 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 15A48601EF; Thu, 15 Oct 2026 13:13:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C01B11F000C5; Thu, 15 Oct 2026 13:13:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792069982; bh=jrD8iMQpGrXv+6P9BDKZqISE7Mm2HK9N4DXQXzF098U=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=ChdvvS1fd01T4OTX0JJNwSoMM6Jxgoh9E220FtYZutyq2qBfs5G3bl57QKSA98tns /7uSr/E1H1HhkaJehP8eVknMrPPSPtqNYDFCpgg3Ty2uwjnGlg50L4itHxBwfodKe4 4WvA/y/ce416BSGUi2iDrz2+z0zV2yUsu+RgPJIv5YAJzCKu/fdQcLhmktI/kRmEDD jSUESRQ5jPWpjm9VDzQP8G92+bQxZrbIhNmukqffjPvCOu38XhuxkqogPTUNdCsf43 ebf3muFH38VCD2qS2neScQfz/WN4Dwoh8RDirM58klusub+yycOjKEb2FYp41N+eOY HMo3NxO7o78dQ== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-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 1xHLGW-00000003Jgg-2drl; Thu, 15 Oct 2026 13:13:00 +0000 Date: Thu, 15 Oct 2026 14:13:00 +0100 Message-ID: <86ld7z150j.wl-maz@kernel.org> From: Marc Zyngier To: Fuad Tabba Cc: Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Steffen Eiden , kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, Fuad Tabba Subject: Re: [PATCH 5/7] KVM: arm64: Add helpers to halt a vCPU In-Reply-To: <20261015125716.2650737-1-fuad.tabba@linux.dev> References: <20261015100539.1011760-6-maz@kernel.org> <20261015125716.2650737-1-fuad.tabba@linux.dev> 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: fuad.tabba@linux.dev, oupton@kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, seiden@linux.ibm.com, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, tabba@google.com 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 Thu, 15 Oct 2026 13:57:16 +0100, Fuad Tabba wrote: > > Hi Marc, > > On Thu, 15 Oct 2026 11:05:37 +0100, Oliver Upton wrote: > [...] > > Signed-off-by: Oliver Upton > > Link: https://patch.msgid.link/20260929212925.31775-2-oupton@kernel.org > > Signed-off-by: Marc Zyngier > > Should this one have a Cc: stable too? Patch 6 is tagged for stable and > calls kvm_pause_vcpu() and kvm_resume_vcpu(), so it won't build in > stable without this patch. My take is that there is no need to backport this patch at all. A valid backport of patch #6 should simply halt the full VM, not just a single vcpu. Thanks, M. -- Without deviation from the norm, progress is not possible.