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 2CA4EC3DA4B for ; Wed, 17 Jul 2024 09:22:06 +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=X1dJAE+Jz/qLwRV2ykq0JPyml1I/Op/bWu48BW5k4qE=; b=mw6C7SyXMJ1L0otZTXduvvqsce ob4F/QhJ404oTnbm3IAeKRz490Pf7vrLUAnT+T8B5u9Nz19pg9zsIvIVTSy5Wq5+YXzRBBQw93BIq kEsAEHHWcbEDnYpaZvBr66XCGUVyMUkn8Qmwkc419RKEDWbSNisYbAg85b+FC/qVKzEcaDIKyW3CZ /soj57Le8YsOZ4JCEEsNR+uzCmJAH8cqEX/QyucaY8REb6mKHDSsRM7SKwp1p5V1xWr1tdKz/lFxg 4hjfA0wf/vchxhDD5Hr/L7kJUMAKZTjVCCFA2dSk4wJUoWVpyH0jZct5Z+gWFcKsdUCPSjozdDdvg rSWTE8ew==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sU0rD-0000000DIlV-2zXs; Wed, 17 Jul 2024 09:21:55 +0000 Received: from sin.source.kernel.org ([145.40.73.55]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sU0qt-0000000DIgH-057M for linux-arm-kernel@lists.infradead.org; Wed, 17 Jul 2024 09:21:36 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 366E7CE1412; Wed, 17 Jul 2024 09:21:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6687AC32782; Wed, 17 Jul 2024 09:21:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1721208092; bh=p/14NgBTEAYOXETrq6QR4JyC+13t5geb+OWGpfi6kos=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=YNHP085RQ1+8gJ/IWDLH7lPABlFl8G/hek5vHVJAKCdEPoVQk629c8i8TRDimaAVK B0Ef06/+RyZ9zeORL/MG3jCEA+PDxm9XqBfJaA6u4RKH0JjX3423215TgnvvpRGSV3 xvZzuavsC3YBoBRLGFx6MTRJ/3D0sB9YqGu6zOSbZnaHfRLOdW1eW6l+dwNMMu2kGg fr3aYaXeyZw2cgGdDdN7+8tRC9HaOCRwAQXD6vX57oSSzUOxi0+FjYpxXgsRmiiTOZ e8Bdv0Cy6JMGvCVcdq/nzZma1sUOJOIsbrGJ9BcGP6lApvb8uWJY8AL1nsU63z0jlB S3ry17/YsqO+A== 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 4.95) (envelope-from ) id 1sU0qo-00D5oD-0g; Wed, 17 Jul 2024 10:21:30 +0100 Date: Wed, 17 Jul 2024 10:21:29 +0100 Message-ID: <86o76w2x2e.wl-maz@kernel.org> From: Marc Zyngier To: Tangnianyao Cc: , , , Thomas Gleixner , "guoyang (C)" , jiangkunkun , wangwudi Subject: Re: [PATCH 0/3] irqchip/gic-v4: Fix VMAPP/VMOVP races In-Reply-To: <42e08881-5faf-a78c-0d94-2a48415bc655@huawei.com> References: <20240705093155.871070-1-maz@kernel.org> <42e08881-5faf-a78c-0d94-2a48415bc655@huawei.com> 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/29.3 (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: tangnianyao@huawei.com, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, guoyang2@huawei.com, jiangkunkun@huawei.com, wangwudi@hisilicon.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240717_022135_260077_48938121 X-CRM114-Status: GOOD ( 15.55 ) 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 Wed, 17 Jul 2024 09:41:30 +0100, Tangnianyao wrote: > > Hi, Marc > > I meet another problem while fixing this in kernel 5.10. > > Kernel 5.10 does not support guard and we replace it with raw_spin_lock/unlock. > When guest insmod nic drivers, it trigger host cpu power off somehow. The same > testcase runs quite good in kernel 6.6(both host and guest). This suggests that you got the locking order wrong, that one or several CPUs deadlock, and that a watchdog fires. > Would you fix this on long-term kernel 5.10? Or any sugguestion? Sorry, but I have no intention to maintain such an ancient kernel, which is why I did not Cc stable on these patches. I have no bandwidth for this, nor any interest in it. M. -- Without deviation from the norm, progress is not possible.