[PATCH 0/2] KVM: x86: Rep string I/O WARN removal and test

[Sean Christopherson]

Remove a WARN that was added as part of the recent I/O overhaul to play
nice with SEV-ES string I/O.

For the record, my FIXME in lieu of a WARN was deliberate, as I suspected
userspace could trigger a WARN ;-)

Based on kvm/master, commit 95e16b4792b0 ("KVM: SEV-ES: go over the
sev_pio_data buffer in multiple passes if needed").

Sean Christopherson (2):
  KVM: x86: Don't WARN if userspace mucks with RCX during string I/O
    exit
  KVM: selftests: Add test to verify KVM doesn't explode on "bad" I/O

 arch/x86/kvm/x86.c                            |   9 +-
 tools/testing/selftests/kvm/.gitignore        |   1 +
 tools/testing/selftests/kvm/Makefile          |   1 +
 .../selftests/kvm/x86_64/userspace_io_test.c  | 114 ++++++++++++++++++
 4 files changed, 123 insertions(+), 2 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/x86_64/userspace_io_test.c

-- 
2.33.0.1079.g6e70778dc9-goog