From patchwork Fri Apr 12 08:42:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 13627271 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 91425C04FFE for ; Fri, 12 Apr 2024 08:47:41 +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=Arj8eCcS3c7P1rzGdDb8e7vUoIKilOWV0iYwb5LzGFE=; b=1xa3r29Q5bGudj fjBX4EfDDwslb/AoZNXAA2IdIgSETrezkolBvVIxKJSTMqH2VjqPGX3Lwxd1gnHfNlJscs6gWGg4s N5KrkvygP2QUPCkYbO3WC37A0NxI0PUMxd2fakPefhVzDwDIHykMqFqGYjwZfejySjODMNZbDPTNS 9KJ2K7NFQgUTAu7ysak5nCRvOvLj8NG600orqd9zCdAuXsv5kcwq77nGcc3SwnK3Tjyi3loDvNmYe 6CBcz08zYXnc3c7v38qkQJifgQ6a5ShCjjexCjiBsMz2oSXuaiNfD2VMmlN2mhC7ovDTQg1XpGB/T sAq8hnO2UqZBFOtPyr4Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rvCZE-0000000GAW5-2QO8; Fri, 12 Apr 2024 08:47:28 +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 1rvCWN-0000000G8hT-2qeP for linux-arm-kernel@lists.infradead.org; Fri, 12 Apr 2024 08:44:33 +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 8B65C113E; Fri, 12 Apr 2024 01:45:00 -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 2F9883F6C4; Fri, 12 Apr 2024 01:44:29 -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 31/43] arm64: rme: Prevent Device mappings for Realms Date: Fri, 12 Apr 2024 09:42:57 +0100 Message-Id: <20240412084309.1733783-32-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_014431_826151_83B5BC76 X-CRM114-Status: UNSURE ( 9.76 ) 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 Physical device assignment is not yet supported by the RMM, so it doesn't make much sense to allow device mappings within the realm. Prevent them when the guest is a realm. Signed-off-by: Steven Price --- arch/arm64/kvm/mmu.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index d891fc3c1a10..48c957e21c83 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1101,6 +1101,10 @@ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa, if (is_protected_kvm_enabled()) return -EPERM; + /* We don't support mapping special pages into a Realm */ + if (kvm_is_realm(kvm)) + return -EINVAL; + size += offset_in_page(guest_ipa); guest_ipa &= PAGE_MASK;