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[174.95.95.253]) by smtp.gmail.com with ESMTPSA id f186sm4295605qkj.106.2021.02.25.08.01.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Feb 2021 08:01:14 -0800 (PST) Date: Thu, 25 Feb 2021 11:01:13 -0500 From: Peter Xu To: Eric Auger Subject: Re: [PATCH v2 3/7] virtio-iommu: Handle non power of 2 range invalidations Message-ID: <20210225160113.GC250483@xz-x1> References: <20210225091435.644762-1-eric.auger@redhat.com> <20210225091435.644762-4-eric.auger@redhat.com> MIME-Version: 1.0 In-Reply-To: <20210225091435.644762-4-eric.auger@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 Received-SPF: pass client-ip=216.205.24.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, jean-philippe@linaro.org, jasowang@redhat.com, qemu-devel@nongnu.org, shameerali.kolothum.thodi@huawei.com, vivek.gautam@arm.com, qemu-arm@nongnu.org, pbonzini@redhat.com, eric.auger.pro@gmail.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Thu, Feb 25, 2021 at 10:14:31AM +0100, Eric Auger wrote: > Unmap notifiers work with an address mask assuming an > invalidation range of a power of 2. Nothing mandates this > in the VIRTIO-IOMMU spec. > > So in case the range is not a power of 2, split it into > several invalidations. > > Signed-off-by: Eric Auger Reviewed-by: Peter Xu -- Peter Xu