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/4.14.3+32-g9de3671772-1_deb11u1+rpi1^2~10
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=77e497f5653034cad375180986009c8705a8db1a;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>
(cherry picked from commit 957708c2d1ae25d7375abd5e5e70c3043d64f1f1)

Gbp-Pq: Name 0035-xen-arm-traps-Don-t-panic-when-receiving-an-unknown-.patch
---

diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c
index 2197df2099..22bd1bd4c6 100644
--- a/xen/arch/arm/traps.c
+++ b/xen/arch/arm/traps.c
@@ -1411,7 +1411,7 @@ 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;
     }
 }