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 EA3AFC982D8 for ; Sat, 19 Sep 2026 18:16:32 +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=8uqyZbYFjivdSJP0aMKKIEPMrtOqIr8aCoIxoeOYNsA=; b=y2il3nORxi2LONqdC0BuK/3od6 mxioNJQABi+PQN0T42JbPNO/YOpuW8KUzXv+0/thDqlBgmvW+Ma57tazv/6CqvoE306Ax2x/NXaCF pn8y5zQbzqFfARL9BNtSK3Bt60SoUPet75ytKb0/2/yqz++4xCr7tk056+P/H+Vc/QmELtMOUQf9q 1MF7PWLym08wAlM4R+CWaKwcHaIZVrWaOmlZ1t6g6GzSOHB0Ll+54zIBlCt/pW63zd4h5267sTxYq 0Wuu6lE9SelGGVC4m24hHtKOF5f+yFHptdl1QVCZDyqzTkD5swLJQ4borjRkQXUucr7FwVNi8bKPH Qu1SYn0Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x7zbu-0000000GZM8-2R5x; Sat, 19 Sep 2026 18:16:26 +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 1x7zbs-0000000GZM1-2rUa for linux-arm-kernel@lists.infradead.org; Sat, 19 Sep 2026 18:16:24 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id D1A7E6025A; Sat, 19 Sep 2026 18:16:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 280241F000FF; Sat, 19 Sep 2026 18:16:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789841783; bh=8uqyZbYFjivdSJP0aMKKIEPMrtOqIr8aCoIxoeOYNsA=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=ENHB77X3aUbsDqyvI1CoPjMBuwQZMSMFu1h+acmovvPzxMXxPe+dNgXbATWtMjBeh KiICsrUSkrsAFRHzcfZ10WBgEhU2KM+sDkooqe34615pc9g1lboPNpBxdM7Qe4pKM6 NbHrRlX+WCJ8wgu8vvxpOh33Pi8BBA5sypjSSRGhJCzFntygX05h22SjTJn0pNSxX3 is1kqpjuLNXIU/z74djRdfY6ZrB96EW9UiLPHT4gv/3SrynG6rqIZwKjQVEQDLsMNl qotje6z2g6NAGTrnmBWukovQuJgXrmwMYrQPfHRraCDb+7EYfqk/grtrXRpPxHDdgl rGDAusNVQm0iQ== Date: Sat, 19 Sep 2026 11:16:21 -0700 From: Oliver Upton To: Marc Zyngier , kvmarm@lists.linux.dev, Karl Mehltretter Cc: Joey Gouly , Steffen Eiden , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Fuad Tabba Subject: Re: [PATCH] KVM: arm64: Fix AArch32 DBGBXVR handling Message-ID: References: <20260810005616.13227-1-kmehltretter@gmail.com> <178984145401.38162.12449211285441501967.b4-ty@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <178984145401.38162.12449211285441501967.b4-ty@kernel.org> 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 Sat, Sep 19, 2026 at 11:11:14AM -0700, Oliver Upton wrote: > On Mon, 10 Aug 2026 02:56:16 +0200, Karl Mehltretter wrote: > > The consolidation of the breakpoint and watchpoint register accessors > > switched DBGBXVR from trap_bvr() to trap_dbg_wb_reg(). The latter > > selects backing storage with demux_wb_reg(), which only handles Op2 values > > 4 through 7. Since DBGBXVR uses Op2 1, an AArch32 guest access hits > > KVM_BUG_ON() and marks the VM dead. > > > > DBGBXVR aliases DBGBVR_EL1[63:32], and its AA32(HI) descriptor > > already selects the upper half. Map Op2 1 to dbg_bvr[] alongside Op2 4, > > restoring the pre-regression behavior. > > > > [...] > > Thanks for pinging, this slipped between the cracks. > > Applied to fixes, thanks! > > [1/1] KVM: arm64: Fix AArch32 DBGBXVR handling > https://git.kernel.org/kvmarm/kvmarm/c/239763bda716 This is now 6b1bca1b1ab7, didn't grab the Cc: stable in the first pass. Thanks, Oliver