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  1. 26 Feb, 2020 2 commits
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    • Harish Kasiviswanathan's avatar
      drm/amdkfd: Check against device cgroup · 6b855f7b
      Harish Kasiviswanathan authored
      Participate in device cgroup. All kfd devices are exposed via /dev/kfd.
      So use /dev/dri/renderN node.
      
      Before exposing the device to a task check if it has permission to
      access it. If the task (based on its cgroup) can access /dev/dri/renderN
      then expose the device via kfd node.
      
      If the task cannot access /dev/dri/renderN then process device data
      (pdd) is not created. This will ensure that task cannot use the device.
      
      In sysfs topology, all device nodes are visible irrespective of the task
      cgroup. The sysfs node directories are created at driver load time and
      cannot be changed dynamically. However, access to information inside
      nodes is controlled based on the task's cgroup permissions.
      Signed-off-by: default avatarHarish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
      Reviewed-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      6b855f7b
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