From patchwork Fri Apr 12 08:43:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 13627285 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 0F187C4345F for ; Fri, 12 Apr 2024 08:48:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: 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: List-Owner; bh=148g/PykEjKHpyLuXEr0tMrhkfum/GD/HwF0KWbrAV0=; b=wDPzWJJ9KWYEkL qoCiigP08JuyqGYPL+A6ayZJc78FLs7oUgC2tkuhzAZr13vq/800L3b0LNaWUz4W+GvcKtZ+tsh5e 3U8z1+1anRT8sFqo4GikDv9J0V6fA4ZnZoaSo2YL5qNRiFrId2BYiZ/kOnhnpwFf/eP108plM/7PF 9Pb1aOFZeNnS5pnQ2z4AxlQ0k/ymdNK7QKgX/HnxxCcAPZFHZMfg811wuBBgY41yEVBfO/aLX0JCp /r+xrgLbMBv1S2g/jzpizCzy8sPxZiOFxv5VG9h1ZUko98xVFE7vKW+rq7+pfQukXaeBGhBeu7UKA 3XjM6PyZMyPfzwEMQncg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rvCa2-0000000GBFl-29Hy; Fri, 12 Apr 2024 08:48:18 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rvCWU-0000000G8ln-3Wp6 for linux-arm-kernel@lists.infradead.org; Fri, 12 Apr 2024 08:44:40 +0000 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 B796B113E; Fri, 12 Apr 2024 01:45:07 -0700 (PDT) Received: from e112269-lin.cambridge.arm.com (e112269-lin.cambridge.arm.com [10.1.194.51]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 5BC8B3F6C4; Fri, 12 Apr 2024 01:44:36 -0700 (PDT) From: Steven Price To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: Steven Price , Catalin Marinas , Marc Zyngier , Will Deacon , James Morse , Oliver Upton , Suzuki K Poulose , Zenghui Yu , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev, Ganapatrao Kulkarni Subject: [PATCH v2 34/43] kvm: rme: Hide KVM_CAP_READONLY_MEM for realm guests Date: Fri, 12 Apr 2024 09:43:00 +0100 Message-Id: <20240412084309.1733783-35-steven.price@arm.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240412084309.1733783-1-steven.price@arm.com> References: <20240412084056.1733704-1-steven.price@arm.com> <20240412084309.1733783-1-steven.price@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240412_014438_994232_5B2C3770 X-CRM114-Status: UNSURE ( 9.80 ) X-CRM114-Notice: Please train this message. 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 For protected memory read only isn't supported. While it may be possible to support read only for unprotected memory, this isn't supported at the present time. Signed-off-by: Steven Price --- arch/arm64/kvm/arm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 2aad83053b62..69d29797c2ed 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -284,7 +284,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_ONE_REG: case KVM_CAP_ARM_PSCI: case KVM_CAP_ARM_PSCI_0_2: - case KVM_CAP_READONLY_MEM: case KVM_CAP_MP_STATE: case KVM_CAP_IMMEDIATE_EXIT: case KVM_CAP_VCPU_EVENTS: @@ -298,6 +297,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_COUNTER_OFFSET: r = 1; break; + case KVM_CAP_READONLY_MEM: case KVM_CAP_SET_GUEST_DEBUG: r = !kvm_is_realm(kvm); break;