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| author | Vivek Kasireddy <vivek.kasireddy@intel.com> | 2021-06-09 11:29:15 -0700 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2021-06-10 07:44:30 +0200 |
| commit | 16c243e99d335e1ef3059871897119affc98b493 (patch) | |
| tree | 41131ee1810901f2e9934ec067e68db9b014cb40 /drivers/gpu/drm/nouveau | |
| parent | 6eca310e8924ab98c73b81dfd39e7dd553ceddfd (diff) | |
| download | linux-16c243e99d335e1ef3059871897119affc98b493.tar.bz2 | |
udmabuf: Add support for mapping hugepages (v4)
If the VMM's (Qemu) memory backend is backed up by memfd + Hugepages
(hugetlbfs and not THP), we have to first find the hugepage(s) where
the Guest allocations are located and then extract the regular 4k
sized subpages from them.
v2: Ensure that the subpage and hugepage offsets are calculated correctly
when the range of subpage allocations cuts across multiple hugepages.
v3: Instead of repeatedly looking up the hugepage for each subpage,
only do it when the subpage allocation crosses over into a different
hugepage. (suggested by Gerd and DW)
v4: Fix the following warning identified by checkpatch:
CHECK:OPEN_ENDED_LINE: Lines should not end with a '('
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20210609182915.592743-1-vivek.kasireddy@intel.com
[ kraxel: one more checkpatch format tweak ]
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau')
0 files changed, 0 insertions, 0 deletions