tests: kvm: Check for a kernel warning
authorAaron Lewis <aaronlewis () google ! com>
Fri, 31 May 2019 14:14:52 +0000 (14:14 +0000)
committerPaolo Bonzini <pbonzini@redhat.com>
Wed, 19 Jun 2019 14:11:54 +0000 (16:11 +0200)
commit9dba988edb31d013003b7f00e82dd56f01db70c3
treecfcd97662a21ec345c913adabdc4dd4b4d2e86af
parent61cfcd545e4291d3130022e6f5f684b5d011374b
tests: kvm: Check for a kernel warning

When running with /sys/module/kvm_intel/parameters/unrestricted_guest=N,
test that a kernel warning does not occur informing us that
vcpu->mmio_needed=1.  This can happen when KVM_RUN is called after a
triple fault.
This test was made to detect a bug that was reported by Syzkaller
(https://groups.google.com/forum/#!topic/syzkaller/lHfau8E3SOE) and
fixed with commit bbeac2830f4de ("KVM: X86: Fix residual mmio emulation
request to userspace").

Signed-off-by: Aaron Lewis <aaronlewis@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Peter Shier <pshier@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
tools/testing/selftests/kvm/.gitignore
tools/testing/selftests/kvm/Makefile
tools/testing/selftests/kvm/include/kvm_util.h
tools/testing/selftests/kvm/include/x86_64/processor.h
tools/testing/selftests/kvm/lib/kvm_util.c
tools/testing/selftests/kvm/lib/x86_64/processor.c
tools/testing/selftests/kvm/x86_64/mmio_warning_test.c [new file with mode: 0644]