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Drivers: hv: vmbus: Suspend/resume the vmbus itself for hibernation

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Before Linux enters hibernation, it sends the CHANNELMSG_UNLOAD message to
the host so all the offers are gone. After hibernation, Linux needs to
re-negotiate with the host using the same vmbus protocol version (which
was in use before hibernation), and ask the host to re-offer the vmbus
devices.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dexuan Cui
2019-09-05 23:01:19 +00:00
committed by Sasha Levin
parent e3ede02add
commit f53335e328
3 changed files with 62 additions and 2 deletions
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2
drivers/hv/hyperv_vmbus.h
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@@ -274,6 +274,8 @@ struct vmbus_msginfo {
extern struct vmbus_connection vmbus_connection;
int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo, u32 version);
static inline void vmbus_send_interrupt(u32 relid)
{
sync_set_bit(relid, vmbus_connection.send_int_page);