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Tue, 15 Feb 2022 23:25:32 -0800 (PST) Received: from xz-m1.local ([64.64.123.81]) by smtp.gmail.com with ESMTPSA id nl8sm11253926pjb.18.2022.02.15.23.25.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Feb 2022 23:25:31 -0800 (PST) Date: Wed, 16 Feb 2022 15:25:20 +0800 From: Peter Xu To: Eugenio =?utf-8?B?UMOpcmV6?= Subject: Re: [PATCH] util: Add iova_tree_alloc Message-ID: References: <345cd684-0cc2-a685-0611-e2fcf0dfc52b@redhat.com> <20220215193422.1777441-2-eperezma@redhat.com> MIME-Version: 1.0 In-Reply-To: <20220215193422.1777441-2-eperezma@redhat.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=peterx@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.129.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.083, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jason Wang , qemu-devel Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Feb 15, 2022 at 08:34:23PM +0100, Eugenio Pérez wrote: > This iova tree function allows it to look for a hole in allocated > regions and return a totally new translation for a given translated > address. > > It's usage is mainly to allow devices to access qemu address space, > remapping guest's one into a new iova space where qemu can add chunks of > addresses. > > Signed-off-by: Eugenio Pérez Reviewed-by: Peter Xu -- Peter Xu