On 12/9/21 06:48, Sean Christopherson wrote:
On Mon, Oct 25, 2021, Sean Christopherson wrote: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.cPing. I completely forgot about this too, until I unintentionally ran a userspace_io_test that was lying around.
Queued now, thanks. I don't know if I want the honor of having KVM singled out again on the -rc release message, but these are bugs nevertheless...
Paolo
