From patchwork Wed Oct 30 13:49:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Patrick Roy X-Patchwork-Id: 13856568 Received: from smtp-fw-33001.amazon.com (smtp-fw-33001.amazon.com [207.171.190.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 98D9F1EF082; Wed, 30 Oct 2024 13:50:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=207.171.190.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730296240; cv=none; b=CId/NxjscHXcGISyVOBbFi5C4bTsRKYvcQqv9VO9vYk91p6vNq0nW7w4aeBigURxU7jTeYtQyMIksYmdmu+8FhG18MJ89TQNrXVvskGsQ1v7f8hbS5eQooZ/yhGFxPv1VeYqD0Eo4pzlz7meIjz3uX+SA+dhQA3A6rP0Ya4JBSE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730296240; c=relaxed/simple; bh=2XmsQ2jMM7AMLi4xSqxrq50XB0/hOeuBKU5JgYVaNLs=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=gqRlg6kZc3zFJn1FwF6MBFlEV99uzGA9j/dxAgy5WE8kfYKyQPX718bG2ZlYnU2ERnliQswCQRey4ybIXa9tJtlHxIIKqLGZQMemT8VStV5PfH5wKQaqv1SRHxULdsis8jGr68lX1ePxbQRlJrNUWunEEkRkWZMsbdvh0WMqdsg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.co.uk; spf=pass smtp.mailfrom=amazon.co.uk; dkim=pass (1024-bit key) header.d=amazon.co.uk header.i=@amazon.co.uk header.b=EtaYSVGQ; arc=none smtp.client-ip=207.171.190.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.co.uk Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amazon.co.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amazon.co.uk header.i=@amazon.co.uk header.b="EtaYSVGQ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.co.uk; i=@amazon.co.uk; q=dns/txt; s=amazon201209; t=1730296239; x=1761832239; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=4gTnpkauDGYjzwRVywsrh01v5XrS76J2GZbKVdbAfi8=; b=EtaYSVGQK+c+AVMjVZNU8BspepuY3yh0+INCDe8Y74EVIOJKD47YB+Lb cmSyIUOWUvNY/+C7ZueuMxV/XQhM1eOhjSctiD8zjCVXmzEXRbaFA/TDq VanXKrEWQH0V31RlYWPdqV4hdmW/X94dX2Xf0K7yLs7EhZovEN6GNKamB M=; X-IronPort-AV: E=Sophos;i="6.11,245,1725321600"; d="scan'208";a="381122811" Received: from pdx4-co-svc-p1-lb2-vlan2.amazon.com (HELO smtpout.prod.us-west-2.prod.farcaster.email.amazon.dev) ([10.25.36.210]) by smtp-border-fw-33001.sea14.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Oct 2024 13:50:38 +0000 Received: from EX19MTAUWB002.ant.amazon.com [10.0.21.151:4737] by smtpin.naws.us-west-2.prod.farcaster.email.amazon.dev [10.0.24.36:2525] with esmtp (Farcaster) id 6a75726f-118b-4ebb-b916-ac128103b7c2; Wed, 30 Oct 2024 13:50:37 +0000 (UTC) X-Farcaster-Flow-ID: 6a75726f-118b-4ebb-b916-ac128103b7c2 Received: from EX19D003UWB001.ant.amazon.com (10.13.138.92) by EX19MTAUWB002.ant.amazon.com (10.250.64.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.34; Wed, 30 Oct 2024 13:50:34 +0000 Received: from EX19MTAUWB001.ant.amazon.com (10.250.64.248) by EX19D003UWB001.ant.amazon.com (10.13.138.92) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.35; Wed, 30 Oct 2024 13:50:34 +0000 Received: from email-imr-corp-prod-pdx-all-2c-8a67eb17.us-west-2.amazon.com (10.25.36.214) by mail-relay.amazon.com (10.250.64.254) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.34 via Frontend Transport; Wed, 30 Oct 2024 13:50:34 +0000 Received: from ua2d7e1a6107c5b.home (dev-dsk-roypat-1c-dbe2a224.eu-west-1.amazon.com [172.19.88.180]) by email-imr-corp-prod-pdx-all-2c-8a67eb17.us-west-2.amazon.com (Postfix) with ESMTPS id AD78B4032D; Wed, 30 Oct 2024 13:50:24 +0000 (UTC) From: Patrick Roy To: , , , , , , , , CC: Patrick Roy , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [RFC PATCH v3 5/6] kvm: document KVM_GMEM_NO_DIRECT_MAP flag Date: Wed, 30 Oct 2024 13:49:09 +0000 Message-ID: <20241030134912.515725-6-roypat@amazon.co.uk> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241030134912.515725-1-roypat@amazon.co.uk> References: <20241030134912.515725-1-roypat@amazon.co.uk> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Signed-off-by: Patrick Roy --- Documentation/virt/kvm/api.rst | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index edc070c6e19b2..c8e21c523411c 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -6382,6 +6382,20 @@ a single guest_memfd file, but the bound ranges must not overlap). See KVM_SET_USER_MEMORY_REGION2 for additional details. +The following flags are defined: + +KVM_GMEM_NO_DIRECT_MAP + Ensure memory backing this guest_memfd inode is unmapped from the kernel's + address space. + +Errors: + + ========== =============================================================== + EOPNOTSUPP `KVM_GMEM_NO_DIRECT_MAP` was set in `flags`, but the host does + not support direct map manipulations. + ========== =============================================================== + + 4.143 KVM_PRE_FAULT_MEMORY ---------------------------