linux-kernel - [PATCH v2 0/2] introduction of version attribute for VFIO live migration

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Date:   Sun,  5 May 2019 21:45:14 -0400
From:   Yan Zhao <yan.y.zhao@...el.com>
To:     intel-gvt-dev@...ts.freedesktop.org
Cc:     arei.gonglei@...wei.com, aik@...abs.ru,
        Zhengxiao.zx@...baba-inc.com, shuangtai.tst@...baba-inc.com,
        qemu-devel@...gnu.org, eauger@...hat.com, yi.l.liu@...el.com,
        ziye.yang@...el.com, mlevitsk@...hat.com, pasic@...ux.ibm.com,
        felipe@...anix.com, changpeng.liu@...el.com, Ken.Xue@....com,
        jonathan.davies@...anix.com, shaopeng.he@...el.com,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        libvir-list@...hat.com, alex.williamson@...hat.com,
        eskultet@...hat.com, dgilbert@...hat.com, cohuck@...hat.com,
        kevin.tian@...el.com, zhenyuw@...ux.intel.com,
        zhi.a.wang@...el.com, cjia@...dia.com, kwankhede@...dia.com,
        berrange@...hat.com, dinechin@...hat.com,
        Yan Zhao <yan.y.zhao@...el.com>
Subject: [PATCH v2 0/2] introduction of version attribute for VFIO live migration

This patchset introduces a version attribute under sysfs of VFIO Mediated
devices.

This version attribute is used to check whether two mdev devices are
compatible.
user space software can take advantage of this version attribute to
determine whether to launch live migration between two mdev devices.

Patch 1 defines version attribute in Documentation/vfio-mediated-device.txt

Patch 2 uses GVT as an example to show how to expose version attribute and
check device compatibility in vendor driver.


v2:
1. renamed patched 1
2. made definition of device version string completely private to vendor
   driver
3. abandoned changes to sample mdev drivers
4. described intent and usage of version attribute more clearly.

Yan Zhao (2):
  vfio/mdev: add version attribute for mdev device
  drm/i915/gvt: export mdev device version to sysfs for Intel vGPU

 Documentation/vfio-mediated-device.txt    | 135 ++++++++++++++++++++++
 drivers/gpu/drm/i915/gvt/Makefile         |   2 +-
 drivers/gpu/drm/i915/gvt/device_version.c |  84 ++++++++++++++
 drivers/gpu/drm/i915/gvt/gvt.c            |  51 ++++++++
 drivers/gpu/drm/i915/gvt/gvt.h            |   6 +
 5 files changed, 277 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/i915/gvt/device_version.c

-- 
2.17.1