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Subject[PATCH 4/6] KVM: selftests: define and use EVMCS_VERSION
Date
KVM allows to use revision_id from MSR_IA32_VMX_BASIC as eVMCS revision_id
to workaround a bug in genuine Hyper-V (see the comment in
nested_vmx_handle_enlightened_vmptrld()), this shouldn't be used by
default. Switch to using KVM_EVMCS_VERSION(1).

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
tools/testing/selftests/kvm/include/evmcs.h | 2 ++
tools/testing/selftests/kvm/lib/x86_64/vmx.c | 2 +-
2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/include/evmcs.h b/tools/testing/selftests/kvm/include/evmcs.h
index 4912d23844bc..d8f4d6bfe05d 100644
--- a/tools/testing/selftests/kvm/include/evmcs.h
+++ b/tools/testing/selftests/kvm/include/evmcs.h
@@ -16,6 +16,8 @@
#define u32 uint32_t
#define u64 uint64_t

+#define EVMCS_VERSION 1
+
extern bool enable_evmcs;

struct hv_vp_assist_page {
diff --git a/tools/testing/selftests/kvm/lib/x86_64/vmx.c b/tools/testing/selftests/kvm/lib/x86_64/vmx.c
index 7aaa99ca4dbc..1efbfa18f184 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/vmx.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/vmx.c
@@ -191,7 +191,7 @@ bool load_vmcs(struct vmx_pages *vmx)
if (evmcs_vmptrld(vmx->enlightened_vmcs_gpa,
vmx->enlightened_vmcs))
return false;
- current_evmcs->revision_id = vmcs_revision();
+ current_evmcs->revision_id = EVMCS_VERSION;
}

return true;
--
2.24.1
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