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 F2D25C35FFA for ; Wed, 19 Mar 2025 13:59:08 +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: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=B2E0klNMIZMWV5rpdbMWqkP/3DacRlL2STP6h1cyfQQ=; b=O0L7pW6UvXIIN4P+FnJOeI3rgJ q3INM7kAFZFHYyOB57UrJ4xzfNihJuFUuUIBINs7nKTbWCMw0m/kZbNZlaPVXsyWhNyXeJSWKyCG/ TYwqwuYv7nmcDD4YTXPpQPP5RqLRBT4lGmhvQcxIciUayPEDuZgsdpYkaoj8xouIGmrAs3saLca2F StRAEF+b4Umddm3u+q4uYOwh548a9xLA9wRkiqqXYv0vLwuqmIdCYhyBWRx+PoOCN265t2kjpu1ZO mpx75Ix2PwbebLveEYvx9kYCmYzBifcy8p2ULwCmPIfg+mj+FTWYNL7plWDzO/rP5FAmSWPJFiv/x 3DfHuANQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tutwh-000000098oi-0Fk8; Wed, 19 Mar 2025 13:58:59 +0000 Received: from nyc.source.kernel.org ([2604:1380:45d1:ec00::3]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tutv0-000000098ft-3l2A for linux-arm-kernel@lists.infradead.org; Wed, 19 Mar 2025 13:57:16 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 346FEA488F1; Wed, 19 Mar 2025 13:51:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4F1DEC4CEE4; Wed, 19 Mar 2025 13:57:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1742392633; bh=jQ1cEr/6AbNtz49EtndMJS/a0gCN5LVsu6g9KKQFAjQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=psc+4RN60eKgIkfk01Oa1tQs/VmjegMBVZjtFSq6b9IDRKqtw4ZIqGWlPZxAhNtKf Z3y8ChxfZjafO6QobtaPFvXcfn2CMjZMi3wGeT8Efr6UpPHeoC3ZizHPZm3kuV13q7 Vo4rJOeaqm3nYPa8M4rmbFQnI2BUJw0ic37STMQY= Date: Wed, 19 Mar 2025 06:55:54 -0700 From: Greg Kroah-Hartman To: Mark Brown Cc: Mark Rutland , Marc Zyngier , Gavin Shan , Oliver Upton , Joey Gouly , Suzuki K Poulose , Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Fuad Tabba Subject: Re: [PATCH 6.12 8/8] KVM: arm64: Eagerly switch ZCR_EL{1,2} Message-ID: <2025031946-myself-underling-0f4d@gregkh> References: <20250314-stable-sve-6-12-v1-0-ddc16609d9ba@kernel.org> <20250314-stable-sve-6-12-v1-8-ddc16609d9ba@kernel.org> <019afc2d-b047-4e33-971c-7debbbaec84d@redhat.com> <86r02tmldh.wl-maz@kernel.org> <83ba4e5b-7700-4527-8376-2c60507bd0d7@sirena.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <83ba4e5b-7700-4527-8376-2c60507bd0d7@sirena.org.uk> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250319_065714_997154_26AC036E X-CRM114-Status: GOOD ( 16.70 ) 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, Mar 19, 2025 at 01:02:30PM +0000, Mark Brown wrote: > On Wed, Mar 19, 2025 at 10:20:11AM +0000, Mark Rutland wrote: > > On Wed, Mar 19, 2025 at 09:15:54AM +0000, Marc Zyngier wrote: > > > > The result is that this change is turning a perfectly valid HYP VA > > > into... something. Odds are that the masking/patching will not mess up > > > the address, but this is completely buggy anyway. In general, > > > kern_hyp_va() is not an idempotent operation. > > > IIUC today it *happens* to be idempotent, but as you say that is not > > guaranteed to remain the case, and this is definitely a logical bug. > > I think so, yes. I suspect the idempotency confused me. > > > > Greg, it may be more prudent to unstage this series from 6.12-stable > > > until we know for sure this is the only problem. > > > As above, likewise with the v6.13 version. > > Yes, please unstage these. I'll send out new versions. All now dropped from both queues, thanks. greg k-h