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 A8E3FC282EC for ; Tue, 18 Mar 2025 11:26:13 +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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From: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=IDhWgcdzgBWxafvqLjeV/zQG+l6/L8759hzkKpQS9YM=; b=sdAtSpeExsIKrfAPM4s3K7gCuq grGgB0sUT/1mWweeBWrXDKIz5Mi3O2/406JDKWfwfb7EEFHcaIs+XKjgHQOvIhnzL8J+1k0qrCPZZ gmVhTYaZhz84y+9r25LftxCg+cBrmP55HtVSjPrnk3QFKT9tCVOC2fKUjxXtHAvIRpZHlSk+ipV75 EfwC401OBHkOmdq9bSo3/Zfp9LV+VoO4gWzI2sfjAL0VtFJHpVZwGdJu/3AQloX8Mu0FXQeuXPhJO gDLPTiH+Y2X+3lHKmb2pOW0pwHHkSFUqctKCrEDj79vemwWG8EOrfJJEIaEbGJ7m5a5rtBwQtKe6f /Kk2pFTg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tuV56-00000005ikl-47Rz; Tue, 18 Mar 2025 11:26:00 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tuV3P-00000005iVe-1pf6 for linux-arm-kernel@lists.infradead.org; Tue, 18 Mar 2025 11:24:16 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id B0C855C571F; Tue, 18 Mar 2025 11:21:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5BF6C4CEDD; Tue, 18 Mar 2025 11:24:12 +0000 (UTC) Date: Tue, 18 Mar 2025 11:24:10 +0000 From: Catalin Marinas To: Oliver Upton Cc: Will Deacon , linux-arm-kernel@lists.infradead.org, Mark Rutland , joey.gouly@arm.com, kvmarm@lists.linux.dev, maz@kernel.org, suzuki.poulose@arm.com, yuzenghui@huawei.com Subject: Re: [PATCH 0/4] arm64: mitigate CVE-2024-7881 in the absence of firmware mitigation Message-ID: References: <20250128155428.210645-1-mark.rutland@arm.com> <174197730164.734861.6726211221092480832.b4-ty@arm.com> <20250317212611.GA12724@willie-the-truck> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250318_042415_528429_F311E057 X-CRM114-Status: GOOD ( 21.72 ) 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 Mon, Mar 17, 2025 at 03:38:34PM -0700, Oliver Upton wrote: > On Mon, Mar 17, 2025 at 09:26:12PM +0000, Will Deacon wrote: > > On Fri, Mar 14, 2025 at 06:37:25PM +0000, Catalin Marinas wrote: > > > On Tue, 28 Jan 2025 15:54:24 +0000, Mark Rutland wrote: > > > > On some CPUs from Arm Ltd, it is possible for unprivileged code to cause > > > > a hardware prefetcher to form an address using the contents of a memory > > > > location which is accessible by privileged accesses in the active > > > > translation regime, potentially leaking the contents of this memory > > > > location via a side channel. This has been assigned CVE-2024-7881: > > > > > > > > https://developer.arm.com/Arm%20Security%20Center/Arm%20CPU%20Vulnerability%20CVE-2024-7881 > > > > > > > > [...] > > > > > > Applied to arm64 (for-next/leaky-prefetcher), thanks! > > > > > > There hasn't been much review (thanks Oliver for looking at the KVM > > > bits) and there's some implied work that can go on top of this series. > > > But the patches looked fine to me, so I queued them. Mark or others, > > > please shout if you'd like them dropped, they are on a branch. > > > > I'm really not comfortable with this series and would prefer to see it > > dropped while we continue the discussion, especially as it's causing > > minor conflicts with the KVM/arm64 tree in -next. > > Catalin, unless you say otherwise, I'm going to assume this will be > dropped in the interim. Yes, I just dropped it. -- Catalin