diff options
| author |   Paolo Bonzini <pbonzini@redhat.com> | 2019-08-14 12:02:41 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-08-15 09:16:02 +0200 |
| commit | 65efa61dc0d536d5f0602c33ee805a57cc07e9dc (patch) | |
| tree | 6794e51c0a6fa5da3fecb33f9642b7a08b2c05a1 /tools/testing/selftests/kvm/lib/x86_64/vmx.c | |
| parent | selftests: kvm: do not try running the VM in vmx_set_nested_state_test (diff) | |
| download | linux-dev-65efa61dc0d536d5f0602c33ee805a57cc07e9dc.tar.xz linux-dev-65efa61dc0d536d5f0602c33ee805a57cc07e9dc.zip | |
selftests: kvm: provide common function to enable eVMCS
There are two tests already enabling eVMCS and a third is coming.
Add a function that enables the capability and tests the result.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/x86_64/vmx.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/lib/x86_64/vmx.c b/tools/testing/selftests/kvm/lib/x86_64/vmx.c index 204f847bd065..9cef0455b819 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/vmx.c +++ b/tools/testing/selftests/kvm/lib/x86_64/vmx.c @@ -12,6 +12,26 @@ bool enable_evmcs; +int vcpu_enable_evmcs(struct kvm_vm *vm, int vcpu_id) +{ + uint16_t evmcs_ver; + + struct kvm_enable_cap enable_evmcs_cap = { + .cap = KVM_CAP_HYPERV_ENLIGHTENED_VMCS, + .args[0] = (unsigned long)&evmcs_ver + }; + + vcpu_ioctl(vm, vcpu_id, KVM_ENABLE_CAP, &enable_evmcs_cap); + + /* KVM should return supported EVMCS version range */ + TEST_ASSERT(((evmcs_ver >> 8) >= (evmcs_ver & 0xff)) && + (evmcs_ver & 0xff) > 0, + "Incorrect EVMCS version range: %x:%x\n", + evmcs_ver & 0xff, evmcs_ver >> 8); + + return evmcs_ver; +} + /* Allocate memory regions for nested VMX tests. * * Input Args: |