Patch "powerpc/xmon: Check before calling xive functions" has been added to the 4.14-stable tree

This is a note to let you know that I've just added the patch titled

powerpc/xmon: Check before calling xive functions

to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
powerpc-xmon-check-before-calling-xive-functions.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Breno Leitao <[email protected]>
Date: Tue, 17 Oct 2017 16:20:18 -0200
Subject: powerpc/xmon: Check before calling xive functions

From: Breno Leitao <[email protected]>

[ Upstream commit 402e172a2ce76210f2fe921cf419d12103851344 ]

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.

---
 arch/powerpc/xmon/xmon.c |    5 +++++
 1 file changed, 5 insertions(+)

@@ -2475,6 +2475,11 @@ 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();

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/powerpc-xmon-check-before-calling-xive-functions.patch