[PATCH v3 00/12] Enhance the hv_vmbus driver to support hibernation

From: Dexuan Cui
Date: Mon Aug 19 2019 - 21:52:01 EST

Hi all,
The patchset is to enhance hv_vmbus to support hibernation when Linux VM
runs on Hyper-V. A second patchset to enhance the high-level VSC drivers
(hv_netvsc, hv_storvsc, etc.) for hibernation will be posted after this
patchset is acceped. If you want to test this hibernation feaure, all the
needed patches can be found on my github branch:

This patchset is based on v5.3-rc5.

Please review.

Hi tglx,
I hope all the 12 patchset, including the below 3 patches,

[PATCH v3 01/12] x86/hyper-v: Suspend/resume the hypercall page for hibernation
[PATCH v3 02/12] x86/hyper-v: Implement hv_is_hibernation_supported()
[PATCH v3 03/12] clocksource/drivers: Suspend/resume Hyper-V

can go through Sasha's hyperv/linux.git tree, since all the changes belong
to the hv stuff. However, if you think it's better for these 3 patches to go
through the tip.git tree, it also works for me.

Hi Michael Kelley,
I added your Reviewed-by's for patch 1, 3, 4, 5, 7 and 9, since you reviewed
these patches. Please review the others.

Looking forward to your comments!


Changes in v2:
Patch 3: Improved the changelog and added a comment.

Patch 4: Remove the "hv_stimer_cleanup" in hv_synic_suspend(), because I
suppose https://lkml.org/lkml/2019/7/27/5 will be accepted. Also
improved changelog and the comment.

Patch 5: Fixed the third argument of print_hex_dump_debug(). Also improved
the changelog.

Patch 6: Improved the changelog and the comment. Added a check for the
'vmbus_proto_version' in vmbus_bus_resume().

Changes in v3:
Patch 2: Add a new API hv_is_hibernation_supported().

Patch 6: Add a new helper function is_sub_channel().

Patch 8: Find the old channels via Instance GUID rather than the RELID.

Patch 10: Add code to clean up hv_sock channels by force

Patch 11: Add code to wait in the suspend path: all the hv_sock channels
and sub-channels should be cleaned up first before Linux sends
the VMBUS UNLOAD message.

Patch 12: Add code to fix up the old primary channels before further

Dexuan Cui (12):
x86/hyper-v: Suspend/resume the hypercall page for hibernation
x86/hyper-v: Implement hv_is_hibernation_supported()
clocksource/drivers: Suspend/resume Hyper-V clocksource for
Drivers: hv: vmbus: Break out synic enable and disable operations
Drivers: hv: vmbus: Suspend/resume the synic for hibernation
Drivers: hv: vmbus: Add a helper function is_sub_channel()
Drivers: hv: vmbus: Implement suspend/resume for VSC drivers for
Drivers: hv: vmbus: Ignore the offers when resuming from hibernation
Drivers: hv: vmbus: Suspend/resume the vmbus itself for hibernation
Drivers: hv: vmbus: Clean up hv_sock channels by force upon suspend
Drivers: hv: vmbus: Suspend after cleaning up hv_sock and sub channels
Drivers: hv: vmbus: Resume after fixing up old primary channels

arch/x86/hyperv/hv_init.c | 41 ++++++
drivers/clocksource/hyperv_timer.c | 25 ++++
drivers/hv/channel_mgmt.c | 127 +++++++++++++++---
drivers/hv/connection.c | 35 ++++-
drivers/hv/hv.c | 66 ++++++----
drivers/hv/hyperv_vmbus.h | 33 +++++
drivers/hv/vmbus_drv.c | 262 +++++++++++++++++++++++++++++++++++++
include/asm-generic/mshyperv.h | 2 +
include/linux/hyperv.h | 16 ++-
9 files changed, 558 insertions(+), 49 deletions(-)