Currently xmon could call XIVE functions from OPAL even if the XIVE is
disabled or does not exist in the system, as in POWER8 machines. This
causes the following exception:
1:mon> dx
cpu 0x1: Vector: 700 (Program Check) at [c000000423c93450]
pc: c00000000009cfa4: opal_xive_dump+0x50/0x68
lr: c0000000000997b8: opal_return+0x0/0x50
This patch simply checks if XIVE is enabled before calling XIVE
functions.
Suggested-by: Guilherme G. Piccoli <[email protected]>
Signed-off-by: Breno Leitao <[email protected]>
---
arch/powerpc/xmon/xmon.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 4679aeb84767..b34976c4a6ba 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -2508,6 +2508,12 @@ static void dump_xives(void)
unsigned long num;
int c;
+ if (!xive_enabled()) {
+ printf("Xive disabled on this system\n");
+
+ return;
+ }
+
c = inchar();
if (c == 'a') {
dump_all_xives();
--
2.14.2
