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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC509C4332F for ; Tue, 22 Nov 2022 13:09:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232586AbiKVNJa (ORCPT ); Tue, 22 Nov 2022 08:09:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39158 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232565AbiKVNJQ (ORCPT ); Tue, 22 Nov 2022 08:09:16 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C38D2F67 for ; Tue, 22 Nov 2022 05:09:15 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 2D512616FA for ; Tue, 22 Nov 2022 13:09:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 827C3C433D7; Tue, 22 Nov 2022 13:09:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669122554; bh=mZekFvAisY9mUBqWWd0bwjJiX/SlXVpaaCucM2Y0WS4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f3R4Xpbd5WZfbTTRLbYGZVOUrle7yVmLCu+m1E3nRXz4yguazPyfJF9ybgVZJKbZn y71fIeFGGmLe6jmdqNQ5bt1pUPO9j5aZqerujKm47K+tzTw1ZNA9qP8EVIS2kHOKF7 /RRUV8JkodiHvHahwISd5DUu5c4NEZmaZRsFlxFmy/ypoA0/VqsX8UVGi+KGilgKIF vwF2u56HHWgnjTFGi0qjf38osk2+vYiGIeh+uLZsLP+UNoANFznlDlTCXpWHrP6596 eDmJQ+y5BuaNI8OhmOk3U/2GSffIY/7l3nfPe8M2f9OVZYK83j2Rdr/Mby5pNsSFbX kGdLjRNpdfJvg== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1oxT1T-007rg0-VZ; Tue, 22 Nov 2022 13:09:12 +0000 From: Marc Zyngier To: James Morse , Oliver Upton , Alexandru Elisei Cc: Will Deacon , kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v4 0/3] KVM: arm64: Fixes for parallel faults series Date: Tue, 22 Nov 2022 13:09:06 +0000 Message-Id: <166912253823.898154.3075564690086280701.b4-ty@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221118182222.3932898-1-oliver.upton@linux.dev> References: <20221118182222.3932898-1-oliver.upton@linux.dev> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: james.morse@arm.com, oliver.upton@linux.dev, alexandru.elisei@arm.com, will@kernel.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Fri, 18 Nov 2022 18:22:19 +0000, Oliver Upton wrote: > Small set of fixes for the parallel faults series. Most importantly, > stop taking the RCU read lock for walking hyp stage-1. For the sake of > consistency, take a pointer to kvm_pgtable_walker in > kvm_dereference_pteref() as well. > > Tested on an Ampere Altra system with kvm-arm.mode={nvhe,protected} and > lockdep. Applies on top of the parallel faults series picked up last > week. > > [...] Applied to next, thanks! [1/3] KVM: arm64: Take a pointer to walker data in kvm_dereference_pteref() commit: 3a5154c723ba5ceb9ce374a7307e03263c03fd29 [2/3] KVM: arm64: Don't acquire RCU read lock for exclusive table walks commit: b7833bf202e3068abb77c642a0843f696e9c8d38 [3/3] KVM: arm64: Reject shared table walks in the hyp code commit: 5e806c5812e8012a83496cf96bdba266b3aec428 Cheers, M. -- Without deviation from the norm, progress is not possible.