Module Name: src
Committed By: riastradh
Date: Fri Jan 19 22:23:04 UTC 2024
Modified Files:
src/sys/external/bsd/drm2/dist/drm/i915/gem: i915_gem_phys.c
Log Message:
i915_gem_phys: Fill sg_pgs.
This is needed by i915 gem fault, which maps user virtual addresses
to those pages, and by i915 gem object destruction, which does
pmap_page_protect on the pages to remove any of those user virtual
mappings.
This needs pmap_kenter_pa rather than pmap_enter(pmap_kernel(), ...)
in order to preserve the _kernel's_ mapping of the pages after
pmap_page_protect.
But bus_dmamem_map currently uses pmap_enter(pmap_kernel(), ...)
instead which creates a mapping that is removed by pmap_page_protect.
So we use a variant of bus_dmamem_map that uses pmap_kenter_pa
instead. Perhaps bus_dmamem_map should do this itself, but this
change is less risky to pull up than a change to bus_dmamem_map
itself.
PR kern/57833: kernel panic on xorg exit
XXX pullup-10
To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.9 \
src/sys/external/bsd/drm2/dist/drm/i915/gem/i915_gem_phys.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
