arm64: AArch32 user space PC alignment exception

ARMv7 does not have a PC alignment exception. ARMv8 AArch32
user space however can produce a PC alignment exception. Add
handler so that we do not dump an unexpected stack trace in
the logs.

Signed-off-by: Mark Salyzyn <salyzyn@android.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index 4306c937b1ff..7ed3d75f6304 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -430,6 +430,8 @@ el0_sync_compat:
         b.eq    el0_fpsimd_acc
         cmp     x24, #ESR_ELx_EC_FP_EXC32       // FP/ASIMD exception
         b.eq    el0_fpsimd_exc
+        cmp     x24, #ESR_ELx_EC_PC_ALIGN       // pc alignment exception
+        b.eq    el0_sp_pc
         cmp     x24, #ESR_ELx_EC_UNKNOWN        // unknown exception in EL0
         b.eq    el0_undef
         cmp     x24, #ESR_ELx_EC_CP15_32        // CP15 MRC/MCR trap