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| author | Dexuan Cui <decui@microsoft.com> | 2020-01-26 06:49:42 +0100 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2020-01-27 04:10:16 +0100 |
| commit | 3e9c72056ed5618bef253f602e79dd2312a0d8a5 (patch) | |
| tree | e6ea3d7d219f8a57eedfd67e83c4bdf4af6291eb /drivers/hv/hv_util.c | |
| parent | Tools: hv: Reopen the devices if read() or write() returns errors (diff) | |
| download | linux-3e9c72056ed5618bef253f602e79dd2312a0d8a5.tar.xz linux-3e9c72056ed5618bef253f602e79dd2312a0d8a5.zip | |
hv_utils: Support host-initiated restart request
The hv_utils driver currently supports a "shutdown" operation initiated
from the Hyper-V host. Newer versions of Hyper-V also support a "restart"
operation. So add support for the updated protocol version that has
"restart" support, and perform a clean reboot when such a message is
received from Hyper-V.
To test the restart functionality, run this PowerShell command on the
Hyper-V host:
Restart-VM <vmname> -Type Reboot
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/hv/hv_util.c')
| -rw-r--r-- | drivers/hv/hv_util.c | 39 |
1 files changed, 31 insertions, 8 deletions
diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c index 766bd8457346..32d96af67522 100644 --- a/drivers/hv/hv_util.c +++ b/drivers/hv/hv_util.c @@ -24,6 +24,8 @@ #define SD_MAJOR 3 #define SD_MINOR 0 +#define SD_MINOR_1 1 +#define SD_VERSION_3_1 (SD_MAJOR << 16 | SD_MINOR_1) #define SD_VERSION (SD_MAJOR << 16 | SD_MINOR) #define SD_MAJOR_1 1 @@ -50,8 +52,9 @@ static int sd_srv_version; static int ts_srv_version; static int hb_srv_version; -#define SD_VER_COUNT 2 +#define SD_VER_COUNT 3 static const int sd_versions[] = { + SD_VERSION_3_1, SD_VERSION, SD_VERSION_1 }; @@ -118,17 +121,27 @@ static void perform_shutdown(struct work_struct *dummy) orderly_poweroff(true); } +static void perform_restart(struct work_struct *dummy) +{ + orderly_reboot(); +} + /* * Perform the shutdown operation in a thread context. */ static DECLARE_WORK(shutdown_work, perform_shutdown); +/* + * Perform the restart operation in a thread context. + */ +static DECLARE_WORK(restart_work, perform_restart); + static void shutdown_onchannelcallback(void *context) { struct vmbus_channel *channel = context; + struct work_struct *work = NULL; u32 recvlen; u64 requestid; - bool execute_shutdown = false; u8 *shut_txf_buf = util_shutdown.recv_buffer; struct shutdown_msg_data *shutdown_msg; @@ -157,19 +170,29 @@ static void shutdown_onchannelcallback(void *context) sizeof(struct vmbuspipe_hdr) + sizeof(struct icmsg_hdr)]; + /* + * shutdown_msg->flags can be 0(shut down), 2(reboot), + * or 4(hibernate). It may bitwise-OR 1, which means + * performing the request by force. Linux always tries + * to perform the request by force. + */ switch (shutdown_msg->flags) { case 0: case 1: icmsghdrp->status = HV_S_OK; - execute_shutdown = true; - + work = &shutdown_work; pr_info("Shutdown request received -" " graceful shutdown initiated\n"); break; + case 2: + case 3: + icmsghdrp->status = HV_S_OK; + work = &restart_work; + pr_info("Restart request received -" + " graceful restart initiated\n"); + break; default: icmsghdrp->status = HV_E_FAIL; - execute_shutdown = false; - pr_info("Shutdown request received -" " Invalid request\n"); break; @@ -184,8 +207,8 @@ static void shutdown_onchannelcallback(void *context) VM_PKT_DATA_INBAND, 0); } - if (execute_shutdown == true) - schedule_work(&shutdown_work); + if (work) + schedule_work(work); } /* |