This patchset introduces support which allows to notify first the
hypervisor about guest entering the s2idle state (patch #1) and second
propagate this notification to user-space so the VMM can take advantage
of such notification (patch #2).

Please see individual patches and commit logs for more verbose description.

Zide Chen (2):
  x86: notify hypervisor about guest entering s2idle state
  KVM: x86: notify user space about guest entering s2idle

 Documentation/virt/kvm/api.rst            | 21 +++++++++++++++++++++
 Documentation/virt/kvm/x86/hypercalls.rst |  7 +++++++
 arch/x86/include/asm/kvm_host.h           |  2 ++
 arch/x86/kvm/x86.c                        | 18 ++++++++++++++++++
 drivers/acpi/x86/s2idle.c                 |  8 ++++++++
 include/linux/suspend.h                   |  1 +
 include/uapi/linux/kvm.h                  |  2 ++
 include/uapi/linux/kvm_para.h             |  1 +
 kernel/power/suspend.c                    |  4 ++++
 tools/include/uapi/linux/kvm.h            |  1 +
 10 files changed, 65 insertions(+)

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2.36.1.476.g0c4daa206d-goog