[PATCH v3 07/14] powerpc/traps: Check for prefixed instructions in facility_unavailable_exception()

[Jordan Niethe <jniethe5@gmail.com>]

If prefixed instructions are made unavailable by the [H]FSCR, attempting
to use them will cause a facility unavailable exception. Add "PREFIX" to
the facility_strings[].

Currently there are no prefixed instructions that are actually emulated
by emulate_instruction() within facility_unavailable_exception().
However, when caused by a prefixed instructions the SRR1 PREFIXED bit is
set. Prepare for dealing with emulated prefixed instructions by checking
for this bit.

Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
---
 arch/powerpc/kernel/traps.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index d80b82fc1ae3..cd8b3043c268 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1739,6 +1739,7 @@ void facility_unavailable_exception(struct pt_regs *regs)
 		[FSCR_TAR_LG] = "TAR",
 		[FSCR_MSGP_LG] = "MSGP",
 		[FSCR_SCV_LG] = "SCV",
+		[FSCR_PREFIX_LG] = "PREFIX",
 	};
 	char *facility = "unknown";
 	u64 value;
-- 
2.17.1