[PATCH v2 3/4] KVM: selftests: Adapt to the updated VMPTRST behavior when eVMCS is used

[Vitaly Kuznetsov <vkuznets@redhat.com>]

Previously, VMPTRST was forbidden with eVMCS and selftests were mocking the
correct behavior in vmptrst() by returning enlightened vmptr directly.
Since KVM's behavior has changed to match genuine Hyper-V, adjust evmcs
test accordingly.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
 tools/testing/selftests/kvm/include/x86/evmcs.h | 8 --------
 tools/testing/selftests/kvm/include/x86/vmx.h   | 3 ---
 tools/testing/selftests/kvm/x86/hyperv_evmcs.c  | 5 ++---
 3 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/x86/evmcs.h b/tools/testing/selftests/kvm/include/x86/evmcs.h
index be79bda024bf..8b14a5dfa04b 100644
--- a/tools/testing/selftests/kvm/include/x86/evmcs.h
+++ b/tools/testing/selftests/kvm/include/x86/evmcs.h
@@ -265,14 +265,6 @@ static inline bool load_evmcs(struct hyperv_test_pages *hv)
 	return true;
 }
 
-static inline int evmcs_vmptrst(u64 *value)
-{
-	*value = current_vp_assist->current_nested_vmcs &
-		~HV_X64_MSR_VP_ASSIST_PAGE_ENABLE;
-
-	return 0;
-}
-
 static inline int evmcs_vmread(u64 encoding, u64 *value)
 {
 	switch (encoding) {
diff --git a/tools/testing/selftests/kvm/include/x86/vmx.h b/tools/testing/selftests/kvm/include/x86/vmx.h
index 90fffaf91595..047d02aa9688 100644
--- a/tools/testing/selftests/kvm/include/x86/vmx.h
+++ b/tools/testing/selftests/kvm/include/x86/vmx.h
@@ -341,9 +341,6 @@ static inline int vmptrst(u64 *value)
 	u64 tmp;
 	u8 ret;
 
-	if (enable_evmcs)
-		return evmcs_vmptrst(value);
-
 	__asm__ __volatile__("vmptrst %[value]; setna %[ret]"
 		: [value]"=m"(tmp), [ret]"=rm"(ret)
 		: : "cc", "memory");
diff --git a/tools/testing/selftests/kvm/x86/hyperv_evmcs.c b/tools/testing/selftests/kvm/x86/hyperv_evmcs.c
index c7fa114aee20..88262ddf7fcb 100644
--- a/tools/testing/selftests/kvm/x86/hyperv_evmcs.c
+++ b/tools/testing/selftests/kvm/x86/hyperv_evmcs.c
@@ -95,16 +95,15 @@ void guest_code(struct vmx_pages *vmx_pages, struct hyperv_test_pages *hv_pages,
 	GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages));
 	GUEST_SYNC(3);
 	GUEST_ASSERT(load_evmcs(hv_pages));
-	GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa);
+	/* VMPTRST returns -1 until VMLAUNCH with eVMCS ptr set */
+	GUEST_ASSERT(vmptrstz() == -1);
 
 	GUEST_SYNC(4);
-	GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa);
 
 	prepare_vmcs(vmx_pages, l2_guest_code,
 		     &l2_guest_stack[L2_GUEST_STACK_SIZE]);
 
 	GUEST_SYNC(5);
-	GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa);
 	current_evmcs->revision_id = -1u;
 	GUEST_ASSERT(vmlaunch());
 	current_evmcs->revision_id = EVMCS_VERSION;
-- 
2.55.0