From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Lendacky, Thomas" <Thomas.Lendacky@amd.com>
Subject: Re: [PATCH 1/2] dma-direct: set_memory_{en,de}crypted() take number
 of pages
Date: Tue, 22 Jan 2019 21:40:16 +0000
Message-ID: <bc09628a-d329-bb95-d737-b7c618860c6a@amd.com>
References: <20190122211758.8317-1-bauerman@linux.ibm.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
        "iommu@lists.linux-foundation.org" <iommu@lists.linux-foundation.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Christoph Hellwig <hch@lst.de>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Robin Murphy <robin.murphy@arm.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        =?utf-8?B?UmFkaW0gS3LEjW3DocWZ?= <rkrcmar@redhat.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>, Ram Pai <linuxram@us.ibm.com>
To: Thiago Jung Bauermann <bauerman@linux.ibm.com>,
        "x86@kernel.org" <x86@kernel.org>
Return-path: <linux-kernel-owner@vger.kernel.org>
In-Reply-To: <20190122211758.8317-1-bauerman@linux.ibm.com>
Content-Language: en-US
Content-ID: <AF8680C2F258B34FB610853AB9622BB6@namprd12.prod.outlook.com>
Sender: linux-kernel-owner@vger.kernel.org
List-Id: kvm.vger.kernel.org
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