mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
2939437ce8
In preparation for consolidating all KVP related defines into a single header file that both the kernel and user level components can use, move the contents of hv_kvp.h into hyperv.h. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
352 lines
8.9 KiB
C
352 lines
8.9 KiB
C
/*
|
|
* Copyright (c) 2010, Microsoft Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
|
|
* Place - Suite 330, Boston, MA 02111-1307 USA.
|
|
*
|
|
* Authors:
|
|
* Haiyang Zhang <haiyangz@microsoft.com>
|
|
* Hank Janssen <hjanssen@microsoft.com>
|
|
*/
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/reboot.h>
|
|
#include <linux/hyperv.h>
|
|
|
|
static void shutdown_onchannelcallback(void *context);
|
|
static struct hv_util_service util_shutdown = {
|
|
.util_cb = shutdown_onchannelcallback,
|
|
};
|
|
|
|
static void timesync_onchannelcallback(void *context);
|
|
static struct hv_util_service util_timesynch = {
|
|
.util_cb = timesync_onchannelcallback,
|
|
};
|
|
|
|
static void heartbeat_onchannelcallback(void *context);
|
|
static struct hv_util_service util_heartbeat = {
|
|
.util_cb = heartbeat_onchannelcallback,
|
|
};
|
|
|
|
static struct hv_util_service util_kvp = {
|
|
.util_cb = hv_kvp_onchannelcallback,
|
|
.util_init = hv_kvp_init,
|
|
.util_deinit = hv_kvp_deinit,
|
|
};
|
|
|
|
static void shutdown_onchannelcallback(void *context)
|
|
{
|
|
struct vmbus_channel *channel = context;
|
|
u32 recvlen;
|
|
u64 requestid;
|
|
u8 execute_shutdown = false;
|
|
u8 *shut_txf_buf = util_shutdown.recv_buffer;
|
|
|
|
struct shutdown_msg_data *shutdown_msg;
|
|
|
|
struct icmsg_hdr *icmsghdrp;
|
|
struct icmsg_negotiate *negop = NULL;
|
|
|
|
vmbus_recvpacket(channel, shut_txf_buf,
|
|
PAGE_SIZE, &recvlen, &requestid);
|
|
|
|
if (recvlen > 0) {
|
|
icmsghdrp = (struct icmsg_hdr *)&shut_txf_buf[
|
|
sizeof(struct vmbuspipe_hdr)];
|
|
|
|
if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
|
|
vmbus_prep_negotiate_resp(icmsghdrp, negop, shut_txf_buf);
|
|
} else {
|
|
shutdown_msg =
|
|
(struct shutdown_msg_data *)&shut_txf_buf[
|
|
sizeof(struct vmbuspipe_hdr) +
|
|
sizeof(struct icmsg_hdr)];
|
|
|
|
switch (shutdown_msg->flags) {
|
|
case 0:
|
|
case 1:
|
|
icmsghdrp->status = HV_S_OK;
|
|
execute_shutdown = true;
|
|
|
|
pr_info("Shutdown request received -"
|
|
" graceful shutdown initiated\n");
|
|
break;
|
|
default:
|
|
icmsghdrp->status = HV_E_FAIL;
|
|
execute_shutdown = false;
|
|
|
|
pr_info("Shutdown request received -"
|
|
" Invalid request\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
|
|
| ICMSGHDRFLAG_RESPONSE;
|
|
|
|
vmbus_sendpacket(channel, shut_txf_buf,
|
|
recvlen, requestid,
|
|
VM_PKT_DATA_INBAND, 0);
|
|
}
|
|
|
|
if (execute_shutdown == true)
|
|
orderly_poweroff(true);
|
|
}
|
|
|
|
/*
|
|
* Set guest time to host UTC time.
|
|
*/
|
|
static inline void do_adj_guesttime(u64 hosttime)
|
|
{
|
|
s64 host_tns;
|
|
struct timespec host_ts;
|
|
|
|
host_tns = (hosttime - WLTIMEDELTA) * 100;
|
|
host_ts = ns_to_timespec(host_tns);
|
|
|
|
do_settimeofday(&host_ts);
|
|
}
|
|
|
|
/*
|
|
* Set the host time in a process context.
|
|
*/
|
|
|
|
struct adj_time_work {
|
|
struct work_struct work;
|
|
u64 host_time;
|
|
};
|
|
|
|
static void hv_set_host_time(struct work_struct *work)
|
|
{
|
|
struct adj_time_work *wrk;
|
|
|
|
wrk = container_of(work, struct adj_time_work, work);
|
|
do_adj_guesttime(wrk->host_time);
|
|
kfree(wrk);
|
|
}
|
|
|
|
/*
|
|
* Synchronize time with host after reboot, restore, etc.
|
|
*
|
|
* ICTIMESYNCFLAG_SYNC flag bit indicates reboot, restore events of the VM.
|
|
* After reboot the flag ICTIMESYNCFLAG_SYNC is included in the first time
|
|
* message after the timesync channel is opened. Since the hv_utils module is
|
|
* loaded after hv_vmbus, the first message is usually missed. The other
|
|
* thing is, systime is automatically set to emulated hardware clock which may
|
|
* not be UTC time or in the same time zone. So, to override these effects, we
|
|
* use the first 50 time samples for initial system time setting.
|
|
*/
|
|
static inline void adj_guesttime(u64 hosttime, u8 flags)
|
|
{
|
|
struct adj_time_work *wrk;
|
|
static s32 scnt = 50;
|
|
|
|
wrk = kmalloc(sizeof(struct adj_time_work), GFP_ATOMIC);
|
|
if (wrk == NULL)
|
|
return;
|
|
|
|
wrk->host_time = hosttime;
|
|
if ((flags & ICTIMESYNCFLAG_SYNC) != 0) {
|
|
INIT_WORK(&wrk->work, hv_set_host_time);
|
|
schedule_work(&wrk->work);
|
|
return;
|
|
}
|
|
|
|
if ((flags & ICTIMESYNCFLAG_SAMPLE) != 0 && scnt > 0) {
|
|
scnt--;
|
|
INIT_WORK(&wrk->work, hv_set_host_time);
|
|
schedule_work(&wrk->work);
|
|
} else
|
|
kfree(wrk);
|
|
}
|
|
|
|
/*
|
|
* Time Sync Channel message handler.
|
|
*/
|
|
static void timesync_onchannelcallback(void *context)
|
|
{
|
|
struct vmbus_channel *channel = context;
|
|
u32 recvlen;
|
|
u64 requestid;
|
|
struct icmsg_hdr *icmsghdrp;
|
|
struct ictimesync_data *timedatap;
|
|
u8 *time_txf_buf = util_timesynch.recv_buffer;
|
|
|
|
vmbus_recvpacket(channel, time_txf_buf,
|
|
PAGE_SIZE, &recvlen, &requestid);
|
|
|
|
if (recvlen > 0) {
|
|
icmsghdrp = (struct icmsg_hdr *)&time_txf_buf[
|
|
sizeof(struct vmbuspipe_hdr)];
|
|
|
|
if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
|
|
vmbus_prep_negotiate_resp(icmsghdrp, NULL, time_txf_buf);
|
|
} else {
|
|
timedatap = (struct ictimesync_data *)&time_txf_buf[
|
|
sizeof(struct vmbuspipe_hdr) +
|
|
sizeof(struct icmsg_hdr)];
|
|
adj_guesttime(timedatap->parenttime, timedatap->flags);
|
|
}
|
|
|
|
icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
|
|
| ICMSGHDRFLAG_RESPONSE;
|
|
|
|
vmbus_sendpacket(channel, time_txf_buf,
|
|
recvlen, requestid,
|
|
VM_PKT_DATA_INBAND, 0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Heartbeat functionality.
|
|
* Every two seconds, Hyper-V send us a heartbeat request message.
|
|
* we respond to this message, and Hyper-V knows we are alive.
|
|
*/
|
|
static void heartbeat_onchannelcallback(void *context)
|
|
{
|
|
struct vmbus_channel *channel = context;
|
|
u32 recvlen;
|
|
u64 requestid;
|
|
struct icmsg_hdr *icmsghdrp;
|
|
struct heartbeat_msg_data *heartbeat_msg;
|
|
u8 *hbeat_txf_buf = util_heartbeat.recv_buffer;
|
|
|
|
vmbus_recvpacket(channel, hbeat_txf_buf,
|
|
PAGE_SIZE, &recvlen, &requestid);
|
|
|
|
if (recvlen > 0) {
|
|
icmsghdrp = (struct icmsg_hdr *)&hbeat_txf_buf[
|
|
sizeof(struct vmbuspipe_hdr)];
|
|
|
|
if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
|
|
vmbus_prep_negotiate_resp(icmsghdrp, NULL, hbeat_txf_buf);
|
|
} else {
|
|
heartbeat_msg =
|
|
(struct heartbeat_msg_data *)&hbeat_txf_buf[
|
|
sizeof(struct vmbuspipe_hdr) +
|
|
sizeof(struct icmsg_hdr)];
|
|
|
|
heartbeat_msg->seq_num += 1;
|
|
}
|
|
|
|
icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
|
|
| ICMSGHDRFLAG_RESPONSE;
|
|
|
|
vmbus_sendpacket(channel, hbeat_txf_buf,
|
|
recvlen, requestid,
|
|
VM_PKT_DATA_INBAND, 0);
|
|
}
|
|
}
|
|
|
|
static int util_probe(struct hv_device *dev,
|
|
const struct hv_vmbus_device_id *dev_id)
|
|
{
|
|
struct hv_util_service *srv =
|
|
(struct hv_util_service *)dev_id->driver_data;
|
|
int ret;
|
|
|
|
srv->recv_buffer = kmalloc(PAGE_SIZE, GFP_KERNEL);
|
|
if (!srv->recv_buffer)
|
|
return -ENOMEM;
|
|
if (srv->util_init) {
|
|
ret = srv->util_init(srv);
|
|
if (ret) {
|
|
ret = -ENODEV;
|
|
goto error1;
|
|
}
|
|
}
|
|
|
|
ret = vmbus_open(dev->channel, 2 * PAGE_SIZE, 2 * PAGE_SIZE, NULL, 0,
|
|
srv->util_cb, dev->channel);
|
|
if (ret)
|
|
goto error;
|
|
|
|
hv_set_drvdata(dev, srv);
|
|
return 0;
|
|
|
|
error:
|
|
if (srv->util_deinit)
|
|
srv->util_deinit();
|
|
error1:
|
|
kfree(srv->recv_buffer);
|
|
return ret;
|
|
}
|
|
|
|
static int util_remove(struct hv_device *dev)
|
|
{
|
|
struct hv_util_service *srv = hv_get_drvdata(dev);
|
|
|
|
vmbus_close(dev->channel);
|
|
if (srv->util_deinit)
|
|
srv->util_deinit();
|
|
kfree(srv->recv_buffer);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct hv_vmbus_device_id id_table[] = {
|
|
/* Shutdown guid */
|
|
{ VMBUS_DEVICE(0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49,
|
|
0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB)
|
|
.driver_data = (unsigned long)&util_shutdown },
|
|
/* Time synch guid */
|
|
{ VMBUS_DEVICE(0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49,
|
|
0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf)
|
|
.driver_data = (unsigned long)&util_timesynch },
|
|
/* Heartbeat guid */
|
|
{ VMBUS_DEVICE(0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e,
|
|
0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d)
|
|
.driver_data = (unsigned long)&util_heartbeat },
|
|
/* KVP guid */
|
|
{ VMBUS_DEVICE(0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d,
|
|
0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x3, 0xe6)
|
|
.driver_data = (unsigned long)&util_kvp },
|
|
{ },
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(vmbus, id_table);
|
|
|
|
/* The one and only one */
|
|
static struct hv_driver util_drv = {
|
|
.name = "hv_util",
|
|
.id_table = id_table,
|
|
.probe = util_probe,
|
|
.remove = util_remove,
|
|
};
|
|
|
|
static int __init init_hyperv_utils(void)
|
|
{
|
|
pr_info("Registering HyperV Utility Driver\n");
|
|
|
|
return vmbus_driver_register(&util_drv);
|
|
}
|
|
|
|
static void exit_hyperv_utils(void)
|
|
{
|
|
pr_info("De-Registered HyperV Utility Driver\n");
|
|
|
|
vmbus_driver_unregister(&util_drv);
|
|
}
|
|
|
|
module_init(init_hyperv_utils);
|
|
module_exit(exit_hyperv_utils);
|
|
|
|
MODULE_DESCRIPTION("Hyper-V Utilities");
|
|
MODULE_VERSION(HV_DRV_VERSION);
|
|
MODULE_LICENSE("GPL");
|