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[80.230.85.71]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4922fa47da9sm59813525e9.5.2026.06.15.22.36.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Jun 2026 22:36:18 -0700 (PDT) Date: Tue, 16 Jun 2026 01:36:14 -0400 From: "Michael S. Tsirkin" To: Gavin Shan Cc: qemu-arm@nongnu.org, qemu-devel@nongnu.org, peterx@redhat.com, alex@shazbot.org, richard.henderson@linaro.org, peter.maydell@linaro.org, berrange@redhat.com, philmd@oss.qualcomm.com, philmd@mailo.com, david@kernel.org, clg@redhat.com, pbonzini@redhat.com, phrdina@redhat.com, jugraham@redhat.com, liugang24219@sangfor.com.cn, dinghui@sangfor.com.cn, shan.gavin@gmail.com Subject: Re: [PATCH v3 0/2] system/memory: Make ram device region directly accessible Message-ID: <20260616013359-mutt-send-email-mst@kernel.org> References: <20260616052552.389021-1-gshan@redhat.com> MIME-Version: 1.0 In-Reply-To: <20260616052552.389021-1-gshan@redhat.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: UPHr-cVsRrJLwsPSJLfI-gF-euXDpPmXtMgujxwgEDI_1781588180 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=170.10.133.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.445, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org On Tue, Jun 16, 2026 at 03:25:50PM +1000, Gavin Shan wrote: > All ram device regions was turned to be indirectly accessible by commit > 4a2e242bbb ("memory: Don't use memcpy for ram_device regions"). What is missing here is the list of issues around direct ram access and how we are solving them. Thanks, -- MST