From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id DB6654C4F4D; Tue, 15 Sep 2026 16:02:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789488169; cv=none; b=eAWidO5vNjgIeNm4hd4furiYvMz00XyZ3vkpqhGjEsv4+rURsKyLTXXsOmvAV3G+liCIrK1QXp9+ONeP2S76QKUPvgzde/dOnwW2p62o8EkM5oPYWHicTCdj3rIYHb9WWvUHNp+/wUrtHIFrJXH7AaQjlbzaTOFUNZ7OKsOpEWQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789488169; c=relaxed/simple; bh=CdQ3LU2C/wF8cnO0VzqHkPRgJxiUsivPTREctdi4DzQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GtW5TjXeOU+65vIIojmulF0mAp/7NzKdvl9CZHGMheX7KU9qR1k68sxY2hRioaZ2PYDXzjwIkMrRaf6z5B7esBxIBBgw38waLNVVCw0XCjXaeYGHlWU/oKYFaU1QlsJjTjIa77/m1HLwUM9S1Qfg2tud+HLa6oEaE2IuZt6o1Cs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=eE9sFgm/; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="eE9sFgm/" 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 7E7171570; Tue, 15 Sep 2026 09:02:43 -0700 (PDT) Received: from ewhatever.cambridge.arm.com (ewhatever.cambridge.arm.com [10.2.197.99]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 5EC183F882; Tue, 15 Sep 2026 09:02:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1789488167; bh=CdQ3LU2C/wF8cnO0VzqHkPRgJxiUsivPTREctdi4DzQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eE9sFgm/9L4mffffTTMC8gBmxw71DbR2kDVTJKfwh7EENeaXUz+dYvUUEb20Luu5X yrpqVtxXU81Xw8+0FtB3uaoRB4YHKw4K1fQaCdwlWJqnhUDYsbOlNTTMVJ+B/4yVJo joV8DrrTQScwI5OjXpRq6VTQD8oKirbUkFGYqIXE= From: Suzuki K Poulose To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: maz@kernel.org, will@kernel.org, catalin.marinas@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, steven.price@arm.com, aneesh.kumar@kernel.org, oupton@kernel.org, gshan@redhat.com, joey.gouly@arm.com, tabba@google.com, yuzenghui@huawei.com, linux-coco@lists.linux.dev, gankulkarni@os.amperecomputing.com, sdonthineni@nvidia.com, alpergun@google.com, fj0570is@fujitsu.com, WeiLin.Chang@arm.com, lpieralisi@kernel.org, enju.kohei@fujitsu.com, Suzuki K Poulose Subject: [PATCH v18 18/23] KVM: arm64: CCA: Mandate VGIC_V3 for Realms Date: Tue, 15 Sep 2026 17:01:36 +0100 Message-ID: <20260915160141.3543048-19-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260915160141.3543048-1-suzuki.poulose@arm.com> References: <20260915160141.3543048-1-suzuki.poulose@arm.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit RMM mandates that we use a VGIC v3 for a Realm and nothing else is supported. Mandate this in KVM. Signed-off-by: Suzuki K Poulose --- arch/arm64/kvm/vgic/vgic-init.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/kvm/vgic/vgic-init.c b/arch/arm64/kvm/vgic/vgic-init.c index 4012df6002ea6..452c085073f3e 100644 --- a/arch/arm64/kvm/vgic/vgic-init.c +++ b/arch/arm64/kvm/vgic/vgic-init.c @@ -84,6 +84,9 @@ int kvm_vgic_create(struct kvm *kvm, u32 type) !kvm_vgic_global_state.can_emulate_gicv2) return -ENODEV; + /* Realms only support VGIC_V3 */ + if (kvm_vm_is_realm(kvm) && type != KVM_DEV_TYPE_ARM_VGIC_V3) + return -ENODEV; /* * Ensure mutual exclusion with vCPU creation and any vCPU ioctls by: * -- 2.43.0