[PATCH 0/3] KVM: selftests: evmcs_test: Check issues induced by late eVMCS mapping upon restore

[Vitaly Kuznetsov]

A regression was introduced by commit f2c7ef3ba955
("KVM: nSVM: cancel KVM_REQ_GET_NESTED_STATE_PAGES on nested vmexit"). When
L2->L1 exit is forced immediately after restoring nested state, 
KVM_REQ_GET_NESTED_STATE_PAGES request is cleared and VMCS12 changes (e.g.
fresh RIP) are not reflected to eVMCS. The consequent nested vCPU run gets
broken. Add a test for the condition (PATCH2). PATCH1 is a preparatory
change, PATCH3 adds a test for a situation when KVM_GET_NESTED_STATE is 
requested right after KVM_SET_NESTED_STATE, this is still broken in KVM
(so the patch is not to be committed).

Vitaly Kuznetsov (3):
  KVM: selftests: evmcs_test: Check that VMLAUNCH with bogus EVMPTR is
    causing #UD
  KVM: selftests: evmcs_test: Check that VMCS12 is alway properly synced
    to eVMCS after restore
  KVM: selftests: evmcs_test: Test that KVM_STATE_NESTED_EVMCS is never
    lost

 .../testing/selftests/kvm/x86_64/evmcs_test.c | 150 +++++++++++++-----
 1 file changed, 108 insertions(+), 42 deletions(-)

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2.30.2