[Spice-devel] [PATCH v4 0/6] Monitor ID between host and guest

[Lukáš Hrázký]

Hello,

this series introduces a new mechanism to identify monitors across the
host and guest boundary, using the pair (device_address and
device_display_id). device_address is a HW address of a graphics device
(a PCI address to be specific, though other address domains can be
used as well), device_display_id is an ID of the monitor on that device.

This information is gathered from QEMU (regular spice) or
spice-streaming-agent (for the streaming channels) and a mapping of
(channel_id, monitor_id) -> (device_address, device_display_id) is sent
from spice server to the vd_agent. vd_agent uses this mapping to
translate the former ID in incoming messages to the latter.

This series follows up on the "QXL interface to set monitor ID" series
[1] and then Jonathon Jongsma's "Use the PCI addr and display ID" [2]
follows up on this to make a complete solution.

You can also find the code in the following branches:
https://gitlab.freedesktop.org/lukash/spice/commits/monitor-id-v3-4
https://gitlab.freedesktop.org/lukash/spice-streaming-agent/commits/monitor-id-v3-4
https://gitlab.freedesktop.org/lukash/vd_agent/commits/monitor-id-v3-4

Cheers,
Lukas


Changes since v3:
* spice-protocol patches were merged.
* Bumped minimum required version of spice-protocol to 0.12.16 for
  spice, spice-streaming-agent and vd_agent.
* spice-streaming-agent: Include cstdlib.h in display-info.cpp.
* spice-streaming-agent: use a constant for maximum device address
  length instead of a number literal.
* spice-streaming-agent: explicitly compare with zero for
  std::string::compare()
* spice-streaming-agent: rename local variable output to xoutput.


[1] https://lists.freedesktop.org/archives/spice-devel/2019-January/046997.html
[2] https://lists.freedesktop.org/archives/spice-devel/2019-January/047547.html

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