From: Ravi Bangoria ravi.bangoria@linux.ibm.com
[ Upstream commit 4441eb02333a9b46a0d919aa7a6d3b137b5f2562 ]
Vector load/store instructions are special because they are always aligned. Thus unaligned EA needs to be aligned down before comparing it with watch ranges. Otherwise we might consider valid event as invalid.
Fixes: 74c6881019b7 ("powerpc/watchpoint: Prepare handler to handle more than one watchpoint") Signed-off-by: Ravi Bangoria ravi.bangoria@linux.ibm.com Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://lore.kernel.org/r/20200902042945.129369-3-ravi.bangoria@linux.ibm.co... Signed-off-by: Sasha Levin sashal@kernel.org --- arch/powerpc/kernel/hw_breakpoint.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c index f39e86d751144..2190be70c7fd9 100644 --- a/arch/powerpc/kernel/hw_breakpoint.c +++ b/arch/powerpc/kernel/hw_breakpoint.c @@ -643,6 +643,8 @@ static void get_instr_detail(struct pt_regs *regs, struct ppc_inst *instr, if (*type == CACHEOP) { *size = cache_op_size(); *ea &= ~(*size - 1); + } else if (*type == LOAD_VMX || *type == STORE_VMX) { + *ea &= ~(*size - 1); } }