tree cc2a28abd9ce7cc7cde8638e2bd2199907bc72e7
parent 85c450ac7ac0a69aca4c6eb845e419ae092d8c86
author Pratyush Anand <panand@redhat.com> 1479132163 +0530
committer Dmitry Shmidt <dimitrysh@google.com> 1489444279 -0700

UPSTREAM: arm64: Allow hw watchpoint at varied offset from base address

ARM64 hardware supports watchpoint at any double word aligned address.
However, it can select any consecutive bytes from offset 0 to 7 from that
base address. For example, if base address is programmed as 0x420030 and
byte select is 0x1C, then access of 0x420032,0x420033 and 0x420034 will
generate a watchpoint exception.

Currently, we do not have such modularity. We can only program byte,
halfword, word and double word access exception from any base address.

This patch adds support to overcome above limitations.

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: I28b1ca63f63182c10c3d6b6b3bacf6c56887ddbe
Bug: 30919905