This patch adds a 'kvm debug' command that's currently an alias for
kill -USR2 `pidof kvm`
Which pauses a guest (freezes all VCPU threads).
Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx>
---
tools/kvm/Makefile | 1 +
tools/kvm/include/kvm/kvm-pause.h | 6 ++++++
tools/kvm/kvm-cmd.c | 2 ++
tools/kvm/kvm-pause.c | 13 +++++++++++++
4 files changed, 22 insertions(+), 0 deletions(-)
create mode 100644 tools/kvm/include/kvm/kvm-pause.h
create mode 100644 tools/kvm/kvm-pause.c
diff --git a/tools/kvm/Makefile b/tools/kvm/Makefile
index a05a6b1..ed82cdf 100644
--- a/tools/kvm/Makefile
+++ b/tools/kvm/Makefile
@@ -42,6 +42,7 @@ OBJS += irq.o
OBJS += kvm-cmd.o
OBJS += kvm-debug.o
OBJS += kvm-help.o
+OBJS += kvm-pause.o
OBJS += kvm-run.o
OBJS += mptable.o
OBJS += rbtree.o
diff --git a/tools/kvm/include/kvm/kvm-pause.h b/tools/kvm/include/kvm/kvm-pause.h
new file mode 100644
index 0000000..0f8e96b
--- /dev/null
+++ b/tools/kvm/include/kvm/kvm-pause.h
@@ -0,0 +1,6 @@
+#ifndef KVM__PAUSE_H
+#define KVM__PAUSE_H
+
+int kvm_cmd_pause(int argc, const char **argv, const char *prefix);
+
+#endif
diff --git a/tools/kvm/kvm-cmd.c b/tools/kvm/kvm-cmd.c
index 2ea51a5..ffbc4ff 100644
--- a/tools/kvm/kvm-cmd.c
+++ b/tools/kvm/kvm-cmd.c
@@ -6,11 +6,13 @@
/* user defined header files */
#include "kvm/kvm-debug.h"
+#include "kvm/kvm-pause.h"
#include "kvm/kvm-help.h"
#include "kvm/kvm-cmd.h"
#include "kvm/kvm-run.h"
struct cmd_struct kvm_commands[] = {
+ { "pause", kvm_cmd_pause, NULL, 0 },
{ "debug", kvm_cmd_debug, NULL, 0 },
{ "help", kvm_cmd_help, NULL, 0 },
{ "run", kvm_cmd_run, kvm_run_help, 0 },
diff --git a/tools/kvm/kvm-pause.c b/tools/kvm/kvm-pause.c
new file mode 100644
index 0000000..fdf8714
--- /dev/null
+++ b/tools/kvm/kvm-pause.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+#include <string.h>
+#include <signal.h>
+
+#include <kvm/util.h>
+#include <kvm/kvm-cmd.h>
+#include <kvm/kvm-pause.h>
+
+int kvm_cmd_pause(int argc, const char **argv, const char *prefix)
+{
+ signal(SIGUSR2, SIG_IGN);
+ return system("kill -USR2 $(pidof kvm)");
+}
--
1.7.5.3
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