From: Julien Grall <jgrall@amazon.com>
Date: Thu, 5 Nov 2020 22:31:06 +0000 (+0000)
Subject: xen/arm: traps: Don't panic when receiving an unknown debug trap
X-Git-Tag: archive/raspbian/4.16.0+51-g0941d6cb-1+rpi1~2^2~42^2~1430
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=957708c2d1ae25d7375abd5e5e70c3043d64f1f1;p=xen.git

xen/arm: traps: Don't panic when receiving an unknown debug trap

Even if debug trap are only meant for debugging purpose, it is quite
harsh to crash Xen if one of the trap sent by the guest is not handled.

So switch from a panic() to a printk().

Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
---

diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c
index 8f40d0e0b6..a36f145e67 100644
--- a/xen/arch/arm/traps.c
+++ b/xen/arch/arm/traps.c
@@ -1410,7 +1410,7 @@ static void do_debug_trap(struct cpu_user_regs *regs, unsigned int code)
         show_execution_state(regs);
         break;
     default:
-        panic("DOM%d: Unhandled debug trap %#x\n", domid, code);
+        printk("DOM%d: Unhandled debug trap %#x\n", domid, code);
         break;
     }
 }