Apply fix for xe driver on Xen

[marmarek]

Copying from patch description:

Fixes display corruption on Xen PV dom0, where DMA buffers are not
guaranteed machine-contiguous, in which case bounce buffering kicks
in, breaking xe's memory coherency assumptions.

Apply the same workaround i915 carries in i915_sg_segment_size() since
commit 78a07fe777c4 ("drm/i915: stop abusing swiotlb_max_segment").

https://gitlab.freedesktop.org/drm/xe/kernel/-/work_items/8382

[marmarek]

openQArun MACHINE=hw18

[qubesos-bot]

OpenQA test summary

Complete test suite and dependencies: https://openqa.qubes-os.org/tests/overview?distri=qubesos&version=4.3&build=202609011244-devel&flavor=kernel

Test run included the following:

• Apply fix for xe driver on Xen #1365 (23a3136)

New failures, excluding unstable

Compared to: https://openqa.qubes-os.org/tests/overview?distri=qubesos&version=4.3&build=202605011353-devel&flavor=kernel

• system_tests_gui_tools@hw18

  • desktop_linux_manager_create_qube: unnamed test (unknown)

  • desktop_linux_manager_create_qube: Failed (test died)
    # Test died: no candidate needle with tag(s) 'new-qube-clone-from-s...

  • desktop_linux_manager_create_qube: unnamed test (unknown)

Failed tests

3 failures

• system_tests_gui_tools@hw18

  • desktop_linux_manager_create_qube: unnamed test (unknown)

  • desktop_linux_manager_create_qube: Failed (test died)
    # Test died: no candidate needle with tag(s) 'new-qube-clone-from-s...

  • desktop_linux_manager_create_qube: unnamed test (unknown)

Fixed failures

Compared to: https://openqa.qubes-os.org/tests/175932#dependencies

2 fixed

• system_tests_update@hw18
  • startup: unnamed test (unknown)
  • startup: Failed (test died)
    # Test died: no candidate needle with tag(s) 'desktop-runner' match...

Unstable tests

Details

• system_tests_gui_interactive@hw18

  clipboard_and_web/ (1/5 times with errors)

  • job 193803 None
  clipboard_and_web/Failed (1/5 times with errors)

  • job 193803 # Test died: no candidate needle with tag(s) 'clipboard-paste-notif...
  gui_keyboard_layout/Failed (1/5 times with errors)

  • job 193752 # Test died: command 'qvm-run -pu root work systemctl --wait is-sys...

Performance Tests

Performance degradation:

No issues

Remaining performance tests:

No remaining performance tests