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Date: Tue, 25 Aug 2020 10:06:11 +0530 From: Ravi Bangoria <ravi.bangoria@...ux.ibm.com> To: mpe@...erman.id.au, christophe.leroy@....fr Cc: ravi.bangoria@...ux.ibm.com, mikey@...ling.org, paulus@...ba.org, naveen.n.rao@...ux.vnet.ibm.com, pedromfc@...ux.ibm.com, rogealve@...ux.ibm.com, jniethe5@...il.com, linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org Subject: [PATCH v5 2/8] powerpc/watchpoint: Fix handling of vector instructions Vector 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@...ux.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); } } -- 2.26.2
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