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: https://github.com/dcui/linux/commits/decui/hibernation/2019-0830/v4/v5.3-rc6-plus This patchset is based on v5.3-rc6, and can also cleanly apply to -rc7. Please review. Hi tglx, I hope all the 12 patchset, including the below 3 patches, [PATCH v4 01/12] x86/hyper-v: Suspend/resume the hypercall page for hibernation [PATCH v4 02/12] x86/hyper-v: Implement hv_is_hibernation_supported() [PATCH v4 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 your tip.git tree, it also works for me. Hi Michael, I added your Reviewed-by's for patch 1, 3~7, 9~10, since you have reviewed these patches. Please review the v4 of the others: 2, 8, 11 and 12. Thanks, Dexuan Changes in v4: Patch 2: Enhanced the changelog. Patch 8: Moved find_primary_channel_by_offer() to channel_mgmt.c, where it's used. Patch 10: Improved the changelog (typo) and comment. Patch 11: Removed WARN_ON_ONCE(), added a comment for the case nr_chan_close_on_suspend == 0. Patch 12: Improved the comment. 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 resuming. 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(). 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 hibernation 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 hibernation 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 | 161 +++++++++++++++++++--- drivers/hv/connection.c | 8 +- drivers/hv/hv.c | 66 +++++---- drivers/hv/hyperv_vmbus.h | 30 +++++ drivers/hv/vmbus_drv.c | 265 +++++++++++++++++++++++++++++++++++++ include/asm-generic/mshyperv.h | 2 + include/linux/hyperv.h | 16 ++- 9 files changed, 565 insertions(+), 49 deletions(-) -- 1.8.3.1
