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=-12.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 6F477C4332B for ; Wed, 10 Mar 2021 15:27:53 +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 1356D64F77 for ; Wed, 10 Mar 2021 15:27:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1356D64F77 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:MIME-Version: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:In-Reply-To:References:List-Owner; bh=4e15YNeVz/7hOTF9ZjRmO2KN9mzsM2GIOzCHlCdUlPE=; b=MNOPY43ku1bYu1IXHPTQEKjjgJ 3OTB7uddQJmZlgiPkkBVpW4qP/Z+ureQDK031DPXuWEQ15I+KaqRjdwdrhTkNYmgHytzFqRqeg1ug 4ZUCaCAqEIj4xfa2zaNBJ2UVTLGtvOSZsP7RV5jZrvqGlGzSRLO1g8nqxcF8DmD34Y3pDU2xfUhvX BtCNX2MCnw+vDR3SnrPMbj8As13SgaG9wLIPcZQ8+4W3hYWMxARCIu0vtigZrGNJ+j7+QK1bAonSU 81BLo6PTob00MzhbFyjXlOQ6xIuHt1+H8mapK8EgqoU3MLjBHggDjinSEFcBt/Jle979Y5McO94Su uvEt/nig==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lK0jL-0076fE-F7; Wed, 10 Mar 2021 15:26:35 +0000 Received: from mail.kernel.org ([198.145.29.99]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lK0jF-0076ef-HC for linux-arm-kernel@lists.infradead.org; Wed, 10 Mar 2021 15:26:32 +0000 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 019CE64F6A; Wed, 10 Mar 2021 15:26:28 +0000 (UTC) Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1lK0jB-000n2m-Ot; Wed, 10 Mar 2021 15:26:26 +0000 From: Marc Zyngier To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Cc: James Morse , Julien Thierry , Suzuki K Poulose , Mark Rutland , Will Deacon , qperret@google.com, kernel-team@android.com Subject: [PATCH 0/4] KVM: arm64: Running the EL2 nVHE code with WXN Date: Wed, 10 Mar 2021 15:26:12 +0000 Message-Id: <20210310152612.3821182-1-maz@kernel.org> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, mark.rutland@arm.com, will@kernel.org, qperret@google.com, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210310_152629_799840_437F7B15 X-CRM114-Status: GOOD ( 13.21 ) 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 Since we use distinct permissions when mapping things at EL2 depending on whether they are text or data, we are already using a W^X setup with nVHE. This trivial series aims to enforce it by setting SCTLR_EL2.WXN at all times. It just cleans up a couple of code paths so that SCTLR_ELx_FLAGS is only used by the KVM setup code, and finally sets the WXN flag permanently. Lightly tested on an A53 system with 4KB and 64KB pages. Thanks, M. Marc Zyngier (4): arm64: Use INIT_SCTLR_EL1_MMU_OFF to disable the MMU on CPU restart KVM: arm64: Use INIT_SCTLR_EL2_MMU_OFF to disable the MMU on KVM teardown KVM: arm64: Rename SCTLR_ELx_FLAGS to SCTLR_EL2_FLAGS KVM: arm64: Force SCTLR_EL2.WXN when running nVHE arch/arm64/include/asm/sysreg.h | 5 +++-- arch/arm64/kernel/cpu-reset.S | 5 +---- arch/arm64/kvm/hyp/nvhe/hyp-init.S | 6 ++---- 3 files changed, 6 insertions(+), 10 deletions(-) -- 2.29.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel