Displaying 2 results from an estimated 2 matches for "4ef589dc9b10".
2020 Mar 16
0
[PATCH 4/4] mm: check the device private page owner in hmm_range_fault
...the calling entity. While nouveau
has some crude checks for that, they are broken because they assume
nouveau is the only user of device private memory. Fix this by
passing in an expected pgmap owner in the hmm_range_fault structure.
Signed-off-by: Christoph Hellwig <hch at lst.de>
Fixes: 4ef589dc9b10 ("mm/hmm/devmem: device memory hotplug using ZONE_DEVICE")
---
drivers/gpu/drm/nouveau/nouveau_dmem.c | 12 ------------
include/linux/hmm.h | 2 ++
mm/hmm.c | 10 +++++++++-
3 files changed, 11 insertions(+), 13 deletions(-)
diff --git...
2020 Mar 16
14
ensure device private pages have an owner v2
When acting on device private mappings a driver needs to know if the
device (or other entity in case of kvmppc) actually owns this private
mapping. This series adds an owner field and converts the migrate_vma
code over to check it. I looked into doing the same for
hmm_range_fault, but as far as I can tell that code has never been
wired up to actually work for device private memory, so instead of