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 5FE00C982D7 for ; Sat, 19 Sep 2026 18:11:31 +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-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=i9vVM2tMTDcLQ7MTmdYRaKZNtkheWY0pH5YNF/l7tWw=; b=4XINxnNlkdrH6Ls0PE1hkCXcsQ T3Rv4IaODfrePZmpuPPGTT2/g0hkSrXqpyFjPaMZgMXuM+25/IlWAALPcgPP3SgVnu199D4m0s9Pk We14Hd/PrE1h0dwgA0pDBlCTOB3xq+3yDdOH+aNJ6EDH8cOh7nZzacZs/EaB9obuc1fYvRkkOlVrc toUWmcUeGrTKedxhr0TWvHn37kJb9kymEvq1+EkrohN9yXmQ+u4ic/CLbj53JoJFLe6Or9Dm2lO+V 2o4VmuVZrc90rlVwZBcei+9jCcxtNmbhp4NvDOItB9NQw92IcJ7M20wOruWFkfkDlLfBb1kQ7vDv1 h51L1WbQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x7zWy-0000000GZBp-0IR9; Sat, 19 Sep 2026 18:11:20 +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 1x7zWw-0000000GZBi-2bIh for linux-arm-kernel@lists.infradead.org; Sat, 19 Sep 2026 18:11:18 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id C510860258; Sat, 19 Sep 2026 18:11:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50C7C1F000FF; Sat, 19 Sep 2026 18:11:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789841477; bh=i9vVM2tMTDcLQ7MTmdYRaKZNtkheWY0pH5YNF/l7tWw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=UQq4YRL8vpyzhOa3jR+GwyVRYi9UjMAhG3+Ueip91Q+T0OctKW9a/9ofnXFXcR35Z MwaUC1lnh9dIsnkhN6CUgiOaZn8U4zB5v/aq2/jF8JsvCj4cSWGQBoZCsi3c6fgtfl pbWRHt9/4D66jh0HjRdxo2Q7isbXsNlFPJ3WERYPBAtDyItbnoBoRphq9wXpi6U1vQ qrV9rQJW5JoMaq/UMooOQtToSQOlj/ng8xe1tvdS/kLPq4ZtwVmxSwTm0ikdzLHYpY /fynCZoYyZTtlr3vzfsXV+YLCeN1xVOMNncmXhGkq7Cj0TwuWjuuyM+TmJbKfmXuXA kkMVwbnhVf7wA== From: Oliver Upton To: Marc Zyngier , kvmarm@lists.linux.dev, Karl Mehltretter Cc: Oliver Upton , 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 Date: Sat, 19 Sep 2026 11:11:14 -0700 Message-ID: <178984145401.38162.12449211285441501967.b4-ty@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260810005616.13227-1-kmehltretter@gmail.com> References: <20260810005616.13227-1-kmehltretter@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit 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, 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 -- Best, Oliver