[PATCH v2 0/4] Fix a race between posted interrupt delivery and migration in a nested VM

[Mingwei Zhang <mizhang@google.com>]

This patch set aims to fix a race condition between posted interrupt
delivery and migration for a nested VM. In particular, we proves that when
a nested vCPU is halted and just migrated, it will lose a posted
interrupt from another vCPU in the same VM.

Changelog:

v1 -> v2:
 - Replace the original vmcs12 bug fix patch into one that processes nested
   state pages request in a common function [paolo].
 - Update the commit messages [seanjc, oupton].
 - Remove vcpu_run_interruptable(), use __vcpu_run() instead [seanjc].
 - Fix format issue in prepare_posted_intr_desc() [seanjc].
 - Rebase to kvm/queue.

v1 link:
 - https://lore.kernel.org/lkml/20220802230718.1891356-6-mizhang@google.com/t/


Jim Mattson (1):
  KVM: selftests: Test if posted interrupt delivery race with migration

Mingwei Zhang (3):
  KVM: x86: move the event handling of KVM_REQ_GET_VMCS12_PAGES into a
    common function
  KVM: selftests: Save/restore vAPIC state in migration tests
  KVM: selftests: Add support for posted interrupt handling in L2

 arch/x86/kvm/x86.c                            |  29 +-
 tools/testing/selftests/kvm/.gitignore        |   1 +
 tools/testing/selftests/kvm/Makefile          |   1 +
 .../selftests/kvm/include/kvm_util_base.h     |  10 +
 .../selftests/kvm/include/x86_64/processor.h  |   1 +
 .../selftests/kvm/include/x86_64/vmx.h        |  10 +
 .../selftests/kvm/lib/x86_64/processor.c      |   2 +
 tools/testing/selftests/kvm/lib/x86_64/vmx.c  |  14 +
 .../kvm/x86_64/vmx_migrate_pi_pending.c       | 291 ++++++++++++++++++
 9 files changed, 353 insertions(+), 6 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/x86_64/vmx_migrate_pi_pending.c


base-commit: 372d07084593dc7a399bf9bee815711b1fb1bcf2
-- 
2.37.2.672.g94769d06f0-goog