From mboxrd@z Thu Jan 1 00:00:00 1970 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 9C8C5C54EAA for ; Fri, 27 Jan 2023 12:17:11 +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=RAtL6Zi8Rne+a1bz3YCULFA71hDpbwoVtdiECgVnJXU=; b=Zx0EqgHP4fisDw iL2VslF1OD8fqa1Jd+ZFSzkRhBnArQBRSSlFsMjUh9RozHOiM7UUoCgLe+nTupRV7myDc3PohBnGu Nc1IcOeyGEVoXZ9/39f5zZoR/ALoli4cjvYXHKvmHXlftMZWmqCt8vHfMHeY/JaBx2FYMQd8775Sf 9Lz0ReAvAvexw4LeRd8zkhiKb0IOlD7hdeKwc1cydYTFCh6y91qQSwChAgHim+E8W9riNmeUkHn65 ekdmHvdJq75pulWzRvS8kE3jW090MCQ+yrcRyQ0heEBvHxGUCE4sFHALM6ZCVtTFo02xYRW7s1H/9 1eVuAxTHZ652QfVlhxVg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pLNe8-00ETPV-Mo; Fri, 27 Jan 2023 12:15:57 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pLN6T-00EDJ9-Bp for linux-arm-kernel@lists.infradead.org; Fri, 27 Jan 2023 11:41:10 +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 B8BAC165C; Fri, 27 Jan 2023 03:41:50 -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 329813F64C; Fri, 27 Jan 2023 03:41:06 -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 28/31] arm64: realm: Enforce virtio F_ACCESS_PLATFORM flag Date: Fri, 27 Jan 2023 11:39:29 +0000 Message-Id: <20230127113932.166089-29-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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230127_034109_587413_7DEA3A45 X-CRM114-Status: GOOD ( 11.04 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org For realms, force the F_ACCESS_PLATFORM flag to ensure DMA-APIs are triggered for virtio in Linux Signed-off-by: Suzuki K Poulose --- arm/aarch64/kvm.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arm/aarch64/kvm.c b/arm/aarch64/kvm.c index a4664237..1f3a0def 100644 --- a/arm/aarch64/kvm.c +++ b/arm/aarch64/kvm.c @@ -5,6 +5,7 @@ #include #include #include +#include #include @@ -237,5 +238,10 @@ void kvm__arch_enable_mte(struct kvm *kvm) u64 kvm__arch_get_virtio_host_features(struct kvm *kvm) { - return 0; + u64 features = 0; + + /* Enforce F_ACCESS_PLATFORM for Realms */ + if (kvm->cfg.arch.is_realm) + features |= (1ULL << VIRTIO_F_ACCESS_PLATFORM); + return features; } -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel