On Thu, Oct 05, 2023 at 07:34:25PM +0000, Easwar Hariharan wrote:
From: Robin Murphy <robin.murphy@xxxxxxx>
commit eb6c97647be227822c7ce23655482b05e348fba5 upstream
Although io-pgtable's non-leaf invalidations are always for full tables,
I missed that SVA also uses non-leaf invalidations, while being at the
mercy of whatever range the MMU notifier throws at it. This means it
definitely wants the previous TTL fix as well, since it also doesn't
know exactly which leaf level(s) may need invalidating, but it can also
give us less-aligned ranges wherein certain corners may lead to building
an invalid command where TTL, Num and Scale are all 0. It should be fine
to handle this by over-invalidating an extra page, since falling back to
a non-range command opens up a whole can of errata-flavoured worms.
Fixes: 6833b8f2e199 ("iommu/arm-smmu-v3: Set TTL invalidation hint better")
Reported-by: Rui Zhu <zhurui3@xxxxxxxxxx>
Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx>
Link: https://lore.kernel.org/r/b99cfe71af2bd93a8a2930f20967fb2a4f7748dd.1694432734.git.robin.murphy@xxxxxxx
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Easwar Hariharan <eahariha@xxxxxxxxxxxxxxxxxxx>
Queued this and the ones for older kernels. In general, if it's just a
cherrypick, please just list commit ids as it makes our lives much
easier :)
--
Thanks,
Sasha
