tree 6415a96de8c0a72993d8fb11ed48e3cd9b924cc3
parent 72ec46f51d10ecb59099b80f9aeb18abc13460e7
author Pratyush Anand <panand@redhat.com> 1479132162 +0530
committer Dmitry Shmidt <dimitrysh@google.com> 1489444265 -0700

UPSTREAM: hw_breakpoint: Allow watchpoint of length 3,5,6 and 7

(cherry picked from commit 651be3cb085341a21847e47c694c249c3e1e4e5b)

We only support breakpoint/watchpoint of length 1, 2, 4 and 8. If we can
support other length as well, then user may watch more data with less
number of watchpoints (provided hardware supports it). For example: if we
have to watch only 4th, 5th and 6th byte from a 64 bit aligned address, we
will have to use two slots to implement it currently. One slot will watch a
half word at offset 4 and other a byte at offset 6. If we can have a
watchpoint of length 3 then we can watch it with single slot as well.

ARM64 hardware does support such functionality, therefore adding these new
definitions in generic layer.

Signed-off-by: Pratyush Anand <panand@redhat.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Pavel Labath <labath@google.com>
Change-Id: Ie17ed89ca526e4fddf591bb4e556fdfb55fc2eac
Bug: 30919905