diff options
| author | Pratyush Anand <panand@redhat.com> | 2016-11-14 19:32:42 +0530 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-13 12:35:30 +0200 |
| commit | e3bd7435b81625795f6d951eef94ff43eceb568f (patch) | |
| tree | 1166e099883b820e82bf7175c96f0a27110ce927 /include | |
| parent | 4a95d8a8c79ca1addcd181ebfa83c1b7580aaa86 (diff) | |
BACKPORT: 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>
[pavel: tools/include/uapi/linux/hw_breakpoint.h is not present in this branch]
Change-Id: Ie17ed89ca526e4fddf591bb4e556fdfb55fc2eac
Bug: 30919905
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/hw_breakpoint.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/linux/hw_breakpoint.h b/include/uapi/linux/hw_breakpoint.h index b04000a22..2b65efd19 100644 --- a/include/uapi/linux/hw_breakpoint.h +++ b/include/uapi/linux/hw_breakpoint.h @@ -4,7 +4,11 @@ enum { HW_BREAKPOINT_LEN_1 = 1, HW_BREAKPOINT_LEN_2 = 2, + HW_BREAKPOINT_LEN_3 = 3, HW_BREAKPOINT_LEN_4 = 4, + HW_BREAKPOINT_LEN_5 = 5, + HW_BREAKPOINT_LEN_6 = 6, + HW_BREAKPOINT_LEN_7 = 7, HW_BREAKPOINT_LEN_8 = 8, }; |