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drm/xe: improve error capture by dumping vma

Francois Dugast requested to merge ifdu/kernel:error-capture into xe

Still under XE_SIMPLE_ERROR_CAPTURE, but that prevents heavy instrumentation of user-side code. By sharing the addresses, we can check the content from the user side using a simple application (from the table of pages to the contents of buffers). The error dump fails if the vm lock cannot be acquired.

Co-developed-by: Philippe Lecluse philippe.lecluse@intel.com Signed-off-by: Philippe Lecluse philippe.lecluse@intel.com Signed-off-by: Francois Dugast francois.dugast@intel.com

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