kvm tools: Send SysRq-P to guest kernel on SIGQUIT

This patch makes SIGQUIT to the host hypervisor send 'SysRq-P' to the guest
kernel via 8250 serial console to make debugging stuck guests easier.

Cc: Asias He <asias.hejun@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/main.c b/main.c
index 6aa2534c..d8f0c090 100644
--- a/main.c
+++ b/main.c
@@ -38,6 +38,7 @@ static void handle_sigint(int sig)
 
 static void handle_sigquit(int sig)
 {
+	serial8250__inject_sysrq(kvm);
 	kvm__show_registers(kvm);
 	kvm__show_code(kvm);
 	kvm__show_page_tables(kvm);