[v2,07/13] powerpc/traps: Check for prefixed instructions in facility_unavailable_exception()
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Message ID 20200211053355.21574-8-jniethe5@gmail.com
State New
Headers show
Series
  • Initial Prefixed Instruction support
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snowpatch_ozlabs/needsstable success Patch has no Fixes tags
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 7 lines checked
snowpatch_ozlabs/apply_patch success Successfully applied on branch powerpc/merge (a5bc6e124219546a81ce334dc9b16483d55e9abf)

Commit Message

Jordan Niethe Feb. 11, 2020, 5:33 a.m. UTC
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(+)

Patch
diff mbox series

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;