From 4441eb02333a9b46a0d919aa7a6d3b137b5f2562 Mon Sep 17 00:00:00 2001 From: Ravi Bangoria Date: Wed, 2 Sep 2020 09:59:39 +0530 Subject: [PATCH] powerpc/watchpoint: Fix handling of vector instructions 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 Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200902042945.129369-3-ravi.bangoria@linux.ibm.com --- 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 9f7df1c37233..f6b24838ca3c 100644 --- a/arch/powerpc/kernel/hw_breakpoint.c +++ b/arch/powerpc/kernel/hw_breakpoint.c @@ -644,6 +644,8 @@ 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); } }