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selftests: kvm: do not set guest mode flag 

Setting KVM_STATE_NESTED_GUEST_MODE enables various consistency checks
on VMCS12 and therefore causes KVM_SET_NESTED_STATE to fail spuriously
with -EINVAL.  Do not set the flag so that we're sure to cover the
conditions included by the test, and cover the case where VMCS12 is
set and KVM_SET_NESTED_STATE is called with invalid VMCS12 contents.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2020-07-27 08:45:00 -04:00
parent 3d9fdc252b
commit 9319676595
1 changed files with 9 additions and 8 deletions
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17
tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c
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@ -76,10 +76,8 @@ void set_default_state(struct kvm_nested_state *state)
void set_default_vmx_state(struct kvm_nested_state *state, int size)
{
memset(state, 0, size);
state->flags = KVM_STATE_NESTED_GUEST_MODE |
KVM_STATE_NESTED_RUN_PENDING;
if (have_evmcs)
state->flags |= KVM_STATE_NESTED_EVMCS;
state->flags = KVM_STATE_NESTED_EVMCS;
state->format = 0;
state->size = size;
state->hdr.vmx.vmxon_pa = 0x1000;
@ -190,17 +188,20 @@ void test_vmx_nested_state(struct kvm_vm *vm)
state->size = sizeof(*state);
test_nested_state(vm, state);
/*
* KVM_SET_NESTED_STATE succeeds with invalid VMCS
* contents but L2 not running.
*/
set_default_vmx_state(state, state_sz);
state->flags = 0;
test_nested_state(vm, state);
/* vmxon_pa cannot be the same address as vmcs_pa. */
set_default_vmx_state(state, state_sz);
state->hdr.vmx.vmxon_pa = 0;
state->hdr.vmx.vmcs12_pa = 0;
test_nested_state_expect_einval(vm, state);
/* The revision id for vmcs12 must be VMCS12_REVISION. */
set_default_vmx_state(state, state_sz);
set_revision_id_for_vmcs12(state, 0);
test_nested_state_expect_einval(vm, state);
/*
* Test that if we leave nesting the state reflects that when we get
* it again.