From patchwork Fri Jan 27 11:39:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suzuki K Poulose X-Patchwork-Id: 13118451 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 679E8C61DB3 for ; Fri, 27 Jan 2023 11:40:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231710AbjA0Lkr (ORCPT ); Fri, 27 Jan 2023 06:40:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59266 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234143AbjA0Lkf (ORCPT ); Fri, 27 Jan 2023 06:40:35 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 4C14D70D54; Fri, 27 Jan 2023 03:40:15 -0800 (PST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id A44601576; Fri, 27 Jan 2023 03:40:33 -0800 (PST) Received: from ewhatever.cambridge.arm.com (ewhatever.cambridge.arm.com [10.1.197.1]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 1E5433F64C; Fri, 27 Jan 2023 03:39:49 -0800 (PST) From: Suzuki K Poulose To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: suzuki.poulose@arm.com, Alexandru Elisei , Andrew Jones , Christoffer Dall , Fuad Tabba , Jean-Philippe Brucker , Joey Gouly , Marc Zyngier , Mark Rutland , Oliver Upton , Paolo Bonzini , Quentin Perret , Steven Price , Thomas Huth , Will Deacon , Zenghui Yu , linux-coco@lists.linux.dev, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [RFC kvmtool 01/31] arm64: Disable MTE when CFI flash is emulated Date: Fri, 27 Jan 2023 11:39:02 +0000 Message-Id: <20230127113932.166089-2-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230127113932.166089-1-suzuki.poulose@arm.com> References: <20230127112248.136810-1-suzuki.poulose@arm.com> <20230127113932.166089-1-suzuki.poulose@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org CFI Flash file image cannot be mapped into the memory of the guest if MTE is enabled. Thus disable MTE if flash emulation is requested. Signed-off-by: Suzuki K Poulose --- arm/aarch64/kvm.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arm/aarch64/kvm.c b/arm/aarch64/kvm.c index 54200c9e..5a53badb 100644 --- a/arm/aarch64/kvm.c +++ b/arm/aarch64/kvm.c @@ -145,6 +145,12 @@ void kvm__arch_enable_mte(struct kvm *kvm) return; } + if (kvm->cfg.flash_filename) { + kvm->cfg.arch.mte_disabled = true; + pr_info("MTE is incompatible with CFI flash support, disabling"); + return; + } + if (kvm->cfg.arch.mte_disabled) { pr_debug("MTE disabled by user"); return;