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Tsirkin" , Marcel Apfelbaum , Laurent Vivier , Paolo Bonzini , Gerd Hoffmann Subject: Re: [RFC PATCH 2/5] qtest/libqos/pci: Fix msix_enable sharing bar0 In-Reply-To: <20241108154229.263097-3-npiggin@gmail.com> References: <20241108154229.263097-1-npiggin@gmail.com> <20241108154229.263097-3-npiggin@gmail.com> Date: Wed, 13 Nov 2024 19:14:44 -0300 Message-ID: <871pzeixwr.fsf@suse.de> MIME-Version: 1.0 Content-Type: text/plain X-Spamd-Result: default: False [-2.67 / 50.00]; BAYES_HAM(-2.87)[99.44%]; SUSPICIOUS_RECIPS(1.50)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_ALL(0.00)[]; URIBL_BLOCKED(0.00)[suse.de:email,suse.de:mid]; FUZZY_BLOCKED(0.00)[rspamd.com]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FREEMAIL_CC(0.00)[gmail.com,redhat.com]; ARC_NA(0.00)[]; FREEMAIL_TO(0.00)[gmail.com,nongnu.org]; RCVD_TLS_ALL(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; MISSING_XM_UA(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; MIME_TRACE(0.00)[0:+]; MID_RHS_MATCH_FROM(0.00)[]; TAGGED_RCPT(0.00)[]; RCPT_COUNT_SEVEN(0.00)[8]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[] Received-SPF: pass client-ip=195.135.223.130; envelope-from=farosas@suse.de; helo=smtp-out1.suse.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Nicholas Piggin writes: > Devices where the MSI-X addresses are shared with other MMIO on BAR0 > can not use msi_enable because it unmaps and remaps BAR0, which > interferes with device MMIO mappings. xhci-nec is one such device we > would like to test msix with. > > Keep track of each the BAR iomaps for each device and add code in msix > to use existing iomap if the msix bars are already mapped. > > Signed-off-by: Nicholas Piggin Reviewed-by: Fabiano Rosas