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Subject[PATCH 3/3] hv_utils: Support host-initiated restart request
Date
To test the code, we should run this command on the host:

Restart-VM $vm -Type Reboot

Signed-off-by: Dexuan Cui <decui@microsoft.com>
---
drivers/hv/hv_util.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
index 9e98c5d..6d642f5 100644
--- a/drivers/hv/hv_util.c
+++ b/drivers/hv/hv_util.c
@@ -24,7 +24,9 @@

#define SD_MAJOR 3
#define SD_MINOR 0
+#define SD_MINOR_1 1
#define SD_MINOR_2 2
+#define SD_VERSION_3_1 (SD_MAJOR << 16 | SD_MINOR_1)
#define SD_VERSION_3_2 (SD_MAJOR << 16 | SD_MINOR_2)
#define SD_VERSION (SD_MAJOR << 16 | SD_MINOR)

@@ -52,9 +54,10 @@
static int ts_srv_version;
static int hb_srv_version;

-#define SD_VER_COUNT 3
+#define SD_VER_COUNT 4
static const int sd_versions[] = {
SD_VERSION_3_2,
+ SD_VERSION_3_1,
SD_VERSION,
SD_VERSION_1
};
@@ -147,6 +150,11 @@ static void perform_shutdown(struct work_struct *dummy)
orderly_poweroff(true);
}

+static void perform_restart(struct work_struct *dummy)
+{
+ orderly_reboot();
+}
+
static void perform_hibernation(struct work_struct *dummy)
{
/*
@@ -175,6 +183,11 @@ static void perform_hibernation(struct work_struct *dummy)
static DECLARE_WORK(shutdown_work, perform_shutdown);

/*
+ * Perform the restart operation in a thread context.
+ */
+static DECLARE_WORK(restart_work, perform_restart);
+
+/*
* Perform the hibernation operation in a thread context.
*/
static DECLARE_WORK(hibernate_work, perform_hibernation);
@@ -222,6 +235,14 @@ static void shutdown_onchannelcallback(void *context)
pr_info("Shutdown request received -"
" graceful shutdown initiated\n");
break;
+ case 2:
+ case 3:
+ pr_info("Restart request received -"
+ " graceful restart initiated\n");
+ icmsghdrp->status = HV_S_OK;
+
+ schedule_work(&restart_work);
+ break;
case 4:
case 5:
pr_info("Hibernation request received -"
--
1.8.3.1
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