Sean Christopherson ab1ef34416 KVM: selftests: Add test to verify TRIPLE_FAULT on invalid L2 guest state ... Add a selftest to attempt to enter L2 with invalid guests state by exiting to userspace via I/O from L2, and then using KVM_SET_SREGS to set invalid guest state (marking TR unusable is arbitrary chosen for its relative simplicity). This is a regression test for a bug introduced by commit c8607e4a08 ("KVM: x86: nVMX: don't fail nested VM entry on invalid guest state if !from_vmentry"), which incorrectly set vmx->fail=true when L2 had invalid guest state and ultimately triggered a WARN due to nested_vmx_vmexit() seeing vmx->fail==true while attempting to synthesize a nested VM-Exit. The is also a functional test to verify that KVM sythesizes TRIPLE_FAULT for L2, which is somewhat arbitrary behavior, instead of emulating L2. KVM should never emulate L2 due to invalid guest state, as it's architecturally impossible for L1 to run an L2 guest with invalid state as nested VM-Enter should always fail, i.e. L1 needs to do the emulation. Stuffing state via KVM ioctl() is a non-architctural, out-of-band case, hence the TRIPLE_FAULT being rather arbitrary. Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20211207193006.120997-5-seanjc@google.com> Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2021-12-20 08:06:55 -05:00
..
cxl	tools/testing/cxl: Introduce a mock memory device + driver	2021-09-21 14:09:34 -07:00
fault-injection
ktest	bootconfig/tracing/ktest: Update ktest example for boot-time tracing	2021-08-16 11:39:51 -04:00
kunit	kunit: tool: fix typecheck errors about loading qemu configs	2021-10-29 13:05:47 -06:00
nvdimm	tools/testing/nvdimm: Fix missing 'fallthrough' warning	2021-08-11 11:55:54 -07:00
radix-tree	tools: Fix math.h breakage	2021-11-30 09:14:42 -08:00
scatterlist	Merge branch 'akpm' (patches from Andrew)	2021-09-03 10:08:28 -07:00
selftests	KVM: selftests: Add test to verify TRIPLE_FAULT on invalid L2 guest state	2021-12-20 08:06:55 -05:00
vsock	vsock_diag_test: remove free_sock_stat() call in test_no_sockets	2021-10-15 17:21:34 -07:00