From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2117F60A2624 for ; Mon, 2 Nov 2026 14:13:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=JetCHqET; dkim=pass (1024-bit key, unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=u8uArIKx DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Unsubscribe-Post: List-Owner; bh=76K72pEWdfxOay4+O36IImo/Yc4P30Q+GZluQh4Ft3o=; b=JetCHqETQPRjQB XzbkZ52G+XuuSBRd/nei8i4OEHkTBEnVMdiNAyNZd8evnHrm48/pOC8BogeC2z50YMOySdSEGwFcg QHni0bagshIQh7wj3M+Q/+Kf96xUVHmNt6ydb2yH+IyWs1F0JzkwXcshJLqmJxDdSqoFYhUo6WQeq N/AZB9ss6aCa0RxRMYdZO7URLFwuSB1YbeN+dUbSL/b0as9NFsYfHiMqo+uqqhTRDIxCfBC8ppOuC bzCztH7F5VWejgjc5FdbeYehtY4UyGxPSFd/snkyuf6ofWYCr9kkEDUZk1H6jFCI9ljf/l1pfdA+Z uadjzErL5tfGLX8Ht8Zg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xNsnF-0000000GjlT-0kZo; Mon, 02 Nov 2026 14:13:49 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xNsnC-0000000GjkE-1vY7 for linux-arm-kernel@lists.infradead.org; Mon, 02 Nov 2026 14:13:48 +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 EE71319F0; Mon, 2 Nov 2026 06:13:41 -0800 (PST) Received: from e122027.arm.com (unknown [10.57.58.9]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B8FB63F59E; Mon, 2 Nov 2026 06:13:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1793628825; bh=Z1wTMEkKoVCrv8XQGReu1ie2hkH7sv7V4AiWMZvW4Q8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=u8uArIKxLShS1Pf1Vmb9ibDtl0ljwY3IMeQUjp1R0YwjTq2C38pI0mDDuzgYlP3ht TIHiOon/DFe/T9I9C+3q/Qu6tiCg1RWEpScfn+pxSdHxl7NBoQ8LPV++jCdO/Hhnb/ wbilikk0OQ6vmbAFxKJyCH9WRPXVBMZqwOJRtHwk= 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 , Gavin Shan , Shanker Donthineni , Alper Gun , "Aneesh Kumar K . V" , Emi Kisanuki , Vishal Annapurve , WeiLin.Chang@arm.com, Lorenzo Pieralisi Subject: [PATCH 03/11] KVM: arm64: CCA: Check for RMI support at KVM init Date: Mon, 2 Nov 2026 14:12:54 +0000 Message-ID: <20261102141304.126883-4-steven.price@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261102141304.126883-1-steven.price@arm.com> References: <20261102141304.126883-1-steven.price@arm.com> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261102_061346_543730_6669BBF6 X-CRM114-Status: GOOD ( 12.73 ) X-Spam-Score: -4.4 (----) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Check if the RMI support is sufficient for using in KVM. Specifically, we will only support creating realm VMs when KVM is set to 'rmm' mode. Signed-off-by: Steven Price --- arch/arm64/kvm/Kconfig | 1 + arch/arm64/kvm/rmi.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index cecea0820e52..d067063a3686 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -34,6 +34,7 @@ menuconfig KVM select GUEST_PERF_EVENTS if PERF_EVENTS select KVM_GUEST_MEMFD select KVM_GENERIC_PRE_FAULT_MEMORY + select ARM_RMM_RMI help Support hosting virtualized guest machines. diff --git a/arch/arm64/kvm/rmi.c b/arch/arm64/kvm/rmi.c index 5ecc8b349869..9d118768550d 100644 --- a/arch/arm64/kvm/rmi.c +++ b/arch/arm64/kvm/rmi.c @@ -3,6 +3,7 @@ * Copyright (C) 2023-2026 ARM Ltd. */ +#include #include #include @@ -12,7 +13,8 @@ void kvm_init_rmi(void) if (kvm_get_mode() != KVM_MODE_RMM) return; - /* TODO: Check if the RMI is available */ + if (!is_rmi_available()) + return; /* Future patch will enable static branch kvm_rmi_is_available */ } -- 2.43.0