[PATCH v8 0/4] Enable notify VM exit

[Chenyi Qiang <chenyi.qiang@intel.com>]

Notify VM exit is introduced to mitigate the potential DOS attach from
malicious VM. This series is the userspace part to enable this feature
through a new KVM capability KVM_CAP_X86_NOTIFY_VMEXIT. The detailed
info can be seen in Patch 4.

The corresponding KVM support can be found in linux 6.0-rc:
(2f4073e08f4c KVM: VMX: Enable Notify VM exit)

---
Change logs:
v7 -> v8
- Add triple_fault_pending field transmission on migration (Paolo)
- Change the notify-vmexit and notify-window to the accelerator property. Add it as
  a x86-specific property. (Paolo)
- Add a preparation patch to expose struct KVMState in order to add target-specific property.
- Define three option for notify-vmexit. Make it on by default. (Paolo)
- Raise a KVM internal error instead of triple fault if invalid context of guest VMCS detected.
- v7: https://lore.kernel.org/qemu-devel/20220923073333.23381-1-chenyi.qiang@intel.com/

v6 -> v7
- Add a warning message when exiting to userspace (Peter Xu)
- v6: https://lore.kernel.org/all/20220915092839.5518-1-chenyi.qiang@intel.com/

v5 -> v6
- Add some info related to the valid range of notify_window in patch 2. (Peter Xu)
- Add the doc in qemu-options.hx. (Peter Xu)
- v5: https://lore.kernel.org/qemu-devel/20220817020845.21855-1-chenyi.qiang@intel.com/

---

Chenyi Qiang (3):
  i386: kvm: extend kvm_{get, put}_vcpu_events to support pending triple
    fault
  kvm: expose struct KVMState
  i386: add notify VM exit support

Paolo Bonzini (1):
  kvm: allow target-specific accelerator properties

 accel/kvm/kvm-all.c      |  78 ++-----------------------
 include/sysemu/kvm.h     |   2 +
 include/sysemu/kvm_int.h |  75 ++++++++++++++++++++++++
 qapi/run-state.json      |  17 ++++++
 qemu-options.hx          |  11 ++++
 target/arm/kvm.c         |   4 ++
 target/i386/cpu.c        |   1 +
 target/i386/cpu.h        |   1 +
 target/i386/kvm/kvm.c    | 121 +++++++++++++++++++++++++++++++++++++++
 target/i386/machine.c    |  20 +++++++
 target/mips/kvm.c        |   4 ++
 target/ppc/kvm.c         |   4 ++
 target/riscv/kvm.c       |   4 ++
 target/s390x/kvm/kvm.c   |   4 ++
 14 files changed, 272 insertions(+), 74 deletions(-)

-- 
2.17.1