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 X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EDFEEC433DB for ; Thu, 11 Mar 2021 19:11:07 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7364364EBB for ; Thu, 11 Mar 2021 19:11:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7364364EBB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=XUiLhww21Tcf0Z/k0wy72LjU2O9iYJPCnCpc9OqD/Sw=; b=ae+rpDjo16kO/3pp6Y5aSacmK QBbfqI07rgneXW2fsZikNcehCwKgMInK61ieeNRVNoNqd2dm9G81yKFXfnlNh3fVpT7RN6RC0xuYz oLsL7OMiTMIzPJlb0BgmsyUvu2p4OmTSq42dsG+cer6bSZSV/v2eJbGAAzuIdHh14zi7ZwVm+d8HA cbWLYXaIsYx2U3buKxqG6GZTpgdIOjc9yYRGX8aOUx3e0d/efM7QJp+9t+rDjW7UBgp0Ij/wv9U7A zpXy+GNJWR0F0GwHhhUELdFfeWLohGdr6qJp2MyXkoRXo5I43xOX7QptoP8De8gS5Znksi+6vwmFz pKWSh+h9w==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lKQgh-009wL2-Ja; Thu, 11 Mar 2021 19:09:35 +0000 Received: from mail.kernel.org ([198.145.29.99]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lKQga-009wJP-Gm for linux-arm-kernel@lists.infradead.org; Thu, 11 Mar 2021 19:09:31 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 93B0E64E60; Thu, 11 Mar 2021 19:09:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1615489766; bh=tjRqrEnr46TNCZjccx2NGAuGGxIXCeGJ/0pAUdHa0PI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=TEL/EMvYZ0+zWrD5EIuzTfjrSYY7hC23Y2j+Z8/RVD2RPw5nW9nlL9OVPhdujco5H IxG1S4eYeByD+3RC4CtWTm2v9bPW3Wp6RTwwEhrAiNVg9ByP/3LKt8qv9TQ5TVf6Rn 168ARlFFeWq63rb7WsPBEmDpUngQIhcuvG3mb/Z3ZznNYhYt5+gDPEnWHMJqgnNnU6 DbcYWMOsemicENDMIBBoIaq6WYPEw+CKiBbYO2yOeJZ7nzkg3ohIzcM+MwF6wA2NPY Cwys5Ma+XGmLRC4S6IjWhKdvD0b1cOPkjRYIdkkA/ct10QYWQmLHVz/w6VMUFp/FOf 87T98ajA+CTHg== Date: Thu, 11 Mar 2021 19:09:20 +0000 From: Will Deacon To: Quentin Perret Cc: catalin.marinas@arm.com, maz@kernel.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, android-kvm@google.com, linux-kernel@vger.kernel.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, tabba@google.com, mark.rutland@arm.com, dbrazdil@google.com, mate.toth-pal@arm.com, seanjc@google.com, robh+dt@kernel.org, ardb@kernel.org Subject: Re: [PATCH v4 31/34] KVM: arm64: Wrap the host with a stage 2 Message-ID: <20210311190919.GC31586@willie-the-truck> References: <20210310175751.3320106-1-qperret@google.com> <20210310175751.3320106-32-qperret@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210310175751.3320106-32-qperret@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210311_190928_836205_857F62EA X-CRM114-Status: GOOD ( 13.15 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Mar 10, 2021 at 05:57:48PM +0000, Quentin Perret wrote: > When KVM runs in protected nVHE mode, make use of a stage 2 page-table > to give the hypervisor some control over the host memory accesses. The > host stage 2 is created lazily using large block mappings if possible, > and will default to page mappings in absence of a better solution. > > From this point on, memory accesses from the host to protected memory > regions (e.g. marked PROT_NONE) are fatal and lead to hyp_panic(). > > Signed-off-by: Quentin Perret > --- > arch/arm64/include/asm/kvm_asm.h | 1 + > arch/arm64/include/asm/kvm_cpufeature.h | 2 + > arch/arm64/kernel/image-vars.h | 3 + > arch/arm64/kvm/arm.c | 10 + > arch/arm64/kvm/hyp/include/nvhe/mem_protect.h | 34 +++ > arch/arm64/kvm/hyp/nvhe/Makefile | 2 +- > arch/arm64/kvm/hyp/nvhe/hyp-init.S | 1 + > arch/arm64/kvm/hyp/nvhe/hyp-main.c | 11 + > arch/arm64/kvm/hyp/nvhe/mem_protect.c | 246 ++++++++++++++++++ > arch/arm64/kvm/hyp/nvhe/setup.c | 5 + > arch/arm64/kvm/hyp/nvhe/switch.c | 7 +- > arch/arm64/kvm/hyp/nvhe/tlb.c | 4 +- > 12 files changed, 319 insertions(+), 7 deletions(-) > create mode 100644 arch/arm64/kvm/hyp/include/nvhe/mem_protect.h > create mode 100644 arch/arm64/kvm/hyp/nvhe/mem_protect.c I like this a lot more now, thanks: Acked-by: Will Deacon Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel