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authorPratyush Anand <panand@redhat.com>2016-11-14 19:32:42 +0530
committerWill Deacon <will.deacon@arm.com>2016-11-18 17:23:17 +0000
commit651be3cb085341a21847e47c694c249c3e1e4e5b (patch)
treeb4a596841030d58a25847f9d87dd15e5f3cbc1b6 /tools/include
parentbc33b0ca11e3df467777a4fa7639ba488c9d4911 (diff)
hw_breakpoint: Allow watchpoint of length 3,5,6 and 7
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>
Diffstat (limited to 'tools/include')
-rw-r--r--tools/include/uapi/linux/hw_breakpoint.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/include/uapi/linux/hw_breakpoint.h b/tools/include/uapi/linux/hw_breakpoint.h
index b04000a2296a..2b65efd19a46 100644
--- a/tools/include/uapi/linux/hw_breakpoint.h
+++ b/tools/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,
};