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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1761135543; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=kJDH41Z/JWvNvJCXJkkhK1BkS0xXU5/DtVgbWD3nml4=; b=YaXouxzP1KIUfgcDc2cv9ExVVFA0vq74XUxN0O6Xpjrw2vErLYvzfuoIf9djO15IKql6RX nkqQTgb9Fu1MtIDoMmTaQirFCkkjnuxllJeovH4FBS0fROJovg6wYJDBGdYXOt6j5KzK1a zFeAposUdGSDuad1MY+C8fZ1nLJhBtQ= X-MC-Unique: hXg5gUO-Opig_WfBtTFqww-1 X-Mimecast-MFC-AGG-ID: hXg5gUO-Opig_WfBtTFqww_1761135541 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-devel@nongnu.org Cc: Alex Williamson , Zhenzhong Duan , Steve Sistare , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Subject: [PULL 04/12] vfio/iommufd: Restore vbasedev's reference to hwpt after CPR transfer Date: Wed, 22 Oct 2025 14:18:38 +0200 Message-ID: <20251022121846.874152-5-clg@redhat.com> In-Reply-To: <20251022121846.874152-1-clg@redhat.com> References: <20251022121846.874152-1-clg@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 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=170.10.133.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-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 @redhat.com) X-ZM-MESSAGEID: 1761135778943158500 From: Zhenzhong Duan After CPR transfer, if there are more than one VFIO devices, device is not added to hwpt->device_list and its reference to hwpt isn't restored on destination. We still need to call iommufd_cdev_attach_container() to restore it after a matching container is found, or else SIGSEV triggers. Fixes: 4296ee07455e ("vfio/iommufd: reconstruct device") Signed-off-by: Zhenzhong Duan Reviewed-by: Steve Sistare Link: https://lore.kernel.org/qemu-devel/20250928085432.40107-5-zhenzhong.d= uan@intel.com Signed-off-by: C=C3=A9dric Le Goater --- hw/vfio/iommufd.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c index 63a16d4dc1795d359ff298bcddda292d1e03028e..24a99efa87f4df268d0df7198f2= 6bba37976874b 100644 --- a/hw/vfio/iommufd.c +++ b/hw/vfio/iommufd.c @@ -560,10 +560,9 @@ static bool iommufd_cdev_attach(const char *name, VFIO= Device *vbasedev, continue; } =20 - if (!cpr_is_incoming()) { + if (!cpr_is_incoming() || + (vbasedev->cpr.ioas_id =3D=3D container->ioas_id)) { res =3D iommufd_cdev_attach_container(vbasedev, container, &er= r); - } else if (vbasedev->cpr.ioas_id =3D=3D container->ioas_id) { - res =3D true; } else { continue; } --=20 2.51.0