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a="65031387" X-IronPort-AV: E=Sophos;i="6.16,313,1744095600"; d="scan'208";a="65031387" X-CSE-ConnectionGUID: a0VNe0GnSqq5Jr6X5sbNaQ== X-CSE-MsgGUID: m3+yE2+WS12PmM4IP4ei7Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.16,313,1744095600"; d="scan'208";a="161455040" From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, eric.auger@redhat.com, steven.sistare@oracle.com, chao.p.peng@intel.com, Zhenzhong Duan Subject: [PATCH] vfio/pci: Recover sub-page BAR size when base address is not aligned Date: Tue, 15 Jul 2025 02:59:52 -0400 Message-ID: <20250715065952.213057-1-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.47.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=198.175.65.11; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com 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, 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_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1752563037047116600 Content-Type: text/plain; charset="utf-8" Currently region_mr and mmap_mr size are recovered to original size when base address is updated to non-PAGE_SIZE aligned, but still leave base_mr with PAGE_SIZE size. This is harmless as base_mr is a only container but still a bit confusing when executing hmp command mtree. Signed-off-by: Zhenzhong Duan --- hw/vfio/pci.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 1093b28df7..0455e6ce30 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -1348,9 +1348,7 @@ static void vfio_sub_page_bar_update_mapping(PCIDevic= e *pdev, int bar) =20 memory_region_transaction_begin(); =20 - if (vdev->bars[bar].size < size) { - memory_region_set_size(base_mr, size); - } + memory_region_set_size(base_mr, size); memory_region_set_size(region_mr, size); memory_region_set_size(mmap_mr, size); if (size !=3D vdev->bars[bar].size && memory_region_is_mapped(base_mr)= ) { --=20 2.47.1