kvm_svm02: Fix saved stack segment index value

The VMCB init helper function expects GDT item index while the VMCB
segment selector values are byte offsets. Shift the byte offset
of saved stack segment selector to get the correct GDT index.

Link: https://lore.kernel.org/ltp/[email protected]/
Acked-by: Petr Vorel <[email protected]>
Signed-off-by: Martin Doucha <[email protected]>

Author: mdoucha

testcases/kernel/kvm/kvm_svm02.c

@@ -96,7 +96,7 @@ void main(void)
 	vmsave_buf = kvm_alloc_vmcb();
 
 	/* Save allocated stack for later VM reinit */
-	ss = vcpu->vmcb->ss.selector;
+	ss = vcpu->vmcb->ss.selector >> 3;
 	rsp = vcpu->vmcb->rsp;
 
 	/* Load partial state from vmsave_buf and save it to vcpu->vmcb */