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 3B065C43458 for ; Fri, 10 Jul 2026 21:03:37 +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: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=IxDQXUffjDPiX8s75V9lUlztwYc8UXv2+mVoAik2+IY=; b=1lLQImCVJk4ImCVS6DthrGJSZF V8pWhFbgHSIfYQ6nVsv6LdmQtFSB/T6XpDntYqz4rdz4p6NX7sT2iairmDe1wCAfGhDSB1IdlkTn0 nDfquBdaSoTDihhV7bLZmORo4XVQ817oSR/QQbnTfI6Edf99QF6DxYw9YeRGW4ltjCzmWNNcG0dF2 MQKJa4rHBB8zF4Dz3lpXOnIJxp9A04BR+Eq8EO0QFfgxY8Lv5jMoVVLLbaQdfRYPIboK1IOYBvvjO i5iF7DNlaipiKJeZc3mYD/dwvWC/xpXcGOLPCoLfSol5egUjkPDMgP57qEoVQf0FY6TclxYbvk1D7 0iJmMS8A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wiINd-00000005l0e-28Pt; Fri, 10 Jul 2026 21:03:29 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wiINc-00000005l0Y-2W98 for linux-arm-kernel@lists.infradead.org; Fri, 10 Jul 2026 21:03:28 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 67A8140A90; Fri, 10 Jul 2026 21:03:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 863E11F00A3D; Fri, 10 Jul 2026 21:03:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783717407; bh=IxDQXUffjDPiX8s75V9lUlztwYc8UXv2+mVoAik2+IY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PJIxyA9T9LcedZvZtKzFpv4Nv71M/63UFU1MMhcIJ/witPYFfZxgHfa0l5l3+46kt S8jHOqiu9gYMsbCrNw8vyi2rh+mFTGaA5y/q1GxqAMAnyAY2FjVXpfiNIP5qD+lnOd x+gHiqPkYwzJehN+CZ4ENbbhyy4g1NbaMx1nbQ6/l3nfpJC5uiIDnEmI/fdpb7/bxC GS5jVf3EzR2VfcWfBU4XHLnmu429oiVjVzhjB6HOviZFMLcFnUW8YOTwmIaggNUGcB /s/3BXiB253AW0lhVTgW8GBFyc8MrHQQ8oBNocaMftBoE9IqqOuX743M8LC6js1hC9 WpYSuyKI5vHig== From: Sasha Levin To: stable@vger.kernel.org Cc: Sasha Levin , oliver.upton@linux.dev, gregkh@linuxfoundation.org, mizhang@google.com, catalin.marinas@arm.com, will@kernel.org, maz@kernel.org, james.morse@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, mark.rutland@arm.com, ahmed.genidi@arm.com, leo.yan@arm.com, miguel.luis@oracle.com, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Colton Lewis Subject: Re: [PATCH 6.6 v3 0/6] arm64: KVM: Backport VHE-only boot fixes Date: Fri, 10 Jul 2026 17:03:00 -0400 Message-ID: <20260710163023.agent5-0004@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260709223604.12934-1-coltonlewis@google.com> References: <20260709223604.12934-1-coltonlewis@google.com> MIME-Version: 1.0 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 Thu, Jul 09, 2026 at 10:35:57PM +0000, Colton Lewis wrote: > Architectural updates retroactively made FEAT_E2H0 optional, meaning > hardware can implement FEAT_VHE without FEAT_E2H0. On such CPUs, > HCR_EL2.E2H can reset to an unknown state and must be initialized early > so later code can reliably detect whether E2H mode is active. > > Without these fixes, booting 6.6.y as a guest under KVM nested > virtualization will hang at boot. Queued the series for 6.6, thanks. I also picked up the follow-up "arm64: sysreg: Correct sign definitions for EIESB and DoubleLock" on top. -- Thanks, Sasha