From nobody Mon Feb 9 06:25:08 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD247EB64DA for ; Fri, 30 Jun 2023 09:28:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229787AbjF3J24 (ORCPT ); Fri, 30 Jun 2023 05:28:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36110 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232559AbjF3J2t (ORCPT ); Fri, 30 Jun 2023 05:28:49 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F24C72D69 for ; Fri, 30 Jun 2023 02:28:47 -0700 (PDT) Received: from kwepemm600005.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4QsqgW2dSbzcd4d; Fri, 30 Jun 2023 17:25:59 +0800 (CST) Received: from huawei.com (10.50.163.32) by kwepemm600005.china.huawei.com (7.193.23.191) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Fri, 30 Jun 2023 17:28:45 +0800 From: liulongfang To: , , , CC: , , , Subject: [PATCH v11 4/4] Documentation: add debugfs description for vfio Date: Fri, 30 Jun 2023 17:24:57 +0800 Message-ID: <20230630092457.54902-5-liulongfang@huawei.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20230630092457.54902-1-liulongfang@huawei.com> References: <20230630092457.54902-1-liulongfang@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.50.163.32] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To kwepemm600005.china.huawei.com (7.193.23.191) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Longfang Liu 1.Add two debugfs document description file to help users understand how to use the accelerator live migration driver's debugfs. 2.Update the file paths that need to be maintained in MAINTAINERS Signed-off-by: Longfang Liu --- .../ABI/testing/debugfs-hisi-migration | 32 +++++++++++++++++++ Documentation/ABI/testing/debugfs-vfio | 25 +++++++++++++++ MAINTAINERS | 2 ++ 3 files changed, 59 insertions(+) create mode 100644 Documentation/ABI/testing/debugfs-hisi-migration create mode 100644 Documentation/ABI/testing/debugfs-vfio diff --git a/Documentation/ABI/testing/debugfs-hisi-migration b/Documentati= on/ABI/testing/debugfs-hisi-migration new file mode 100644 index 000000000000..0dfc7008a3e1 --- /dev/null +++ b/Documentation/ABI/testing/debugfs-hisi-migration @@ -0,0 +1,32 @@ +What: /sys/kernel/debug/vfio//migration/hisi_acc/data +Date: June 2023 +KernelVersion: 6.4 +Contact: Longfang Liu +Description: Read the live migration data of the vfio device. + The output format of the data is defined by the live + migration driver. + +What: /sys/kernel/debug/vfio//migration/hisi_acc/attr +Date: June 2023 +KernelVersion: 6.4 +Contact: Longfang Liu +Description: Read the live migration attributes of the vfio device. + The output format of the attributes is defined by the live + migration driver. + +What: /sys/kernel/debug/vfio//migration/hisi_acc/io_test +Date: June 2023 +KernelVersion: 6.4 +Contact: Longfang Liu +Description: Trigger the HiSilicon accelerator device to perform + the io test through the read operation, and directly output + the test result. + +What: /sys/kernel/debug/vfio//migration/hisi_acc/save +Date: June 2023 +KernelVersion: 6.4 +Contact: Longfang Liu +Description: Trigger the Hisilicon accelerator device to perform + the state saving operation of live migration through the read + operation, and directly output the operation result. + diff --git a/Documentation/ABI/testing/debugfs-vfio b/Documentation/ABI/tes= ting/debugfs-vfio new file mode 100644 index 000000000000..e2132a2f602b --- /dev/null +++ b/Documentation/ABI/testing/debugfs-vfio @@ -0,0 +1,25 @@ +What: /sys/kernel/debug/vfio +Date: June 2023 +KernelVersion: 6.4 +Contact: Longfang Liu +Description: This debugfs file directory is used for debugging + of vfio devices. + Each device can create a device subdirectory under this + directory by referencing the public registration interface. + +What: /sys/kernel/debug/vfio//migration +Date: June 2023 +KernelVersion: 6.4 +Contact: Longfang Liu +Description: This debugfs file directory is used for debugging + of vfio devices that support live migration. + The debugfs of each vfio device that supports live migration + could be created under this directory. + +What: /sys/kernel/debug/vfio//migration/state +Date: June 2023 +KernelVersion: 6.4 +Contact: Longfang Liu +Description: Read the live migration status of the vfio device. + The status of these live migrations includes: + ERROR, RUNNING, STOP, STOP_COPY, RESUMING. diff --git a/MAINTAINERS b/MAINTAINERS index ce6ac552d8f6..bdd6a5e7350f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -22098,6 +22098,7 @@ L: kvm@vger.kernel.org S: Maintained T: git https://github.com/awilliam/linux-vfio.git F: Documentation/ABI/testing/sysfs-devices-vfio-dev +F: Documentation/ABI/testing/debugfs-vfio F: Documentation/driver-api/vfio.rst F: drivers/vfio/ F: include/linux/vfio.h @@ -22115,6 +22116,7 @@ M: Longfang Liu M: Shameer Kolothum L: kvm@vger.kernel.org S: Maintained +F: Documentation/ABI/testing/debugfs-hisi-migration F: drivers/vfio/pci/hisilicon/ =20 VFIO MEDIATED DEVICE DRIVERS --=20 2.24.0