Nested Virtualization: function hooks

diff -r 9dd987bc025b -r 66478f884c4b xen/arch/x86/hvm/hvm.c
@@ -3198,6 +3198,79 @@ int hvm_debug_op(struct vcpu *v, int32_t
 }
 
 
+int hvm_nestedhvm_vcpu_initialise(struct vcpu *v)
+{
+    if (hvm_funcs.nestedhvm_vcpu_initialise)
+        return hvm_funcs.nestedhvm_vcpu_initialise(v);
+    return -EOPNOTSUPP;
+}
+
+int hvm_nestedhvm_vcpu_destroy(struct vcpu *v)
+{
+    if (hvm_funcs.nestedhvm_vcpu_destroy)
+        return hvm_funcs.nestedhvm_vcpu_destroy(v);
+    return -EOPNOTSUPP;
+}
+
+int hvm_nestedhvm_vcpu_features(struct vcpu *v,
+    uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
+{
+    if (hvm_funcs.nestedhvm_vcpu_features)
+        return hvm_funcs.nestedhvm_vcpu_features(v, eax, ebx, ecx, edx);
+    return -EOPNOTSUPP;
+}
+
+int hvm_nestedhvm_vcpu_hostsave(struct vcpu *v, unsigned int inst_len)
+{
+    if (hvm_funcs.nestedhvm_vcpu_hostsave)
+        return hvm_funcs.nestedhvm_vcpu_hostsave(v, inst_len);
+    return -EOPNOTSUPP;
+}
+
+int hvm_nestedhvm_vcpu_hostrestore(struct vcpu *v, struct cpu_user_regs *regs)
+{
+    if (hvm_funcs.nestedhvm_vcpu_hostrestore)
+        return hvm_funcs.nestedhvm_vcpu_hostrestore(v, regs);
+    return -EOPNOTSUPP;
+}
+
+int hvm_nestedhvm_vcpu_vmsave(struct vcpu *v, uint64_t vmcbaddr)
+{
+    if (hvm_funcs.nestedhvm_vcpu_vmsave)
+        return hvm_funcs.nestedhvm_vcpu_vmsave(v, vmcbaddr);
+    return -EOPNOTSUPP;
+}
+
+int hvm_nestedhvm_vcpu_vmload(struct vcpu *v, uint64_t vmcbaddr)
+{
+    if (hvm_funcs.nestedhvm_vcpu_vmload)
+        return hvm_funcs.nestedhvm_vcpu_vmload(v, vmcbaddr);
+    return -EOPNOTSUPP;
+}
+
+int hvm_nestedhvm_vmcb_prepare4vmrun(struct vcpu *v)
+{
+    if (hvm_funcs.nestedhvm_vmcb_prepare4vmrun)
+        return hvm_funcs.nestedhvm_vmcb_prepare4vmrun(v);
+    return -EOPNOTSUPP;
+}
+
+int hvm_nestedhvm_vcpu_vmrun(struct vcpu *v, struct cpu_user_regs *regs,
+                             unsigned int flags)
+{
+    if (hvm_funcs.nestedhvm_vcpu_vmrun)
+        return hvm_funcs.nestedhvm_vcpu_vmrun(v, regs, flags);
+    return -EOPNOTSUPP;
+}
+
+int hvm_nestedhvm_vmcb_prepare4vmexit(struct vcpu *v)
+{
+    if (hvm_funcs.nestedhvm_vmcb_prepare4vmexit)
+        return hvm_funcs.nestedhvm_vmcb_prepare4vmexit(v);
+    return -EOPNOTSUPP;
+}
+
+
 /*
  * Local variables:
  * mode: C

diff -r 9dd987bc025b -r 66478f884c4b xen/include/asm-x86/hvm/hvm.h
@@ -134,6 +134,21 @@ struct hvm_function_table {
     void (*set_uc_mode)(struct vcpu *v);
     void (*set_info_guest)(struct vcpu *v);
     void (*set_rdtsc_exiting)(struct vcpu *v, bool_t);
+
+    /* Nested HVM */
+    int (*nestedhvm_vcpu_initialise)(struct vcpu *v);
+    int (*nestedhvm_vcpu_destroy)(struct vcpu *v);
+    int (*nestedhvm_vcpu_features)(struct vcpu *v,
+        uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx);
+    int (*nestedhvm_vcpu_hostsave)(struct vcpu *v, unsigned int inst_len);
+    int (*nestedhvm_vcpu_hostrestore)(struct vcpu *v,
+                                struct cpu_user_regs *regs);
+    int (*nestedhvm_vcpu_vmload)(struct vcpu *v, uint64_t vmcbaddr);
+    int (*nestedhvm_vcpu_vmsave)(struct vcpu *v, uint64_t vmcbaddr);
+    int (*nestedhvm_vcpu_vmrun)(struct vcpu *v, struct cpu_user_regs *regs,
+                                unsigned int flags);
+    int (*nestedhvm_vmcb_prepare4vmrun)(struct vcpu *v);
+    int (*nestedhvm_vmcb_prepare4vmexit)(struct vcpu *v);
 };
 
 extern struct hvm_function_table hvm_funcs;

@@ -347,4 +362,21 @@ bool_t hvm_hap_nested_page_fault(unsigne
         ? (u32)__d->arch.incarnation : (u32)(v)->arch.hvm_vcpu.msr_tsc_aux; \
 })
 
+/* Nested HVM */
+int hvm_nestedhvm_vcpu_initialise(struct vcpu *v);
+int hvm_nestedhvm_vcpu_destroy(struct vcpu *v);
+int hvm_nestedhvm_vcpu_features(struct vcpu *v,
+    uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx);
+int hvm_nestedhvm_vcpu_hostsave(struct vcpu *v, unsigned int inst_len);
+int hvm_nestedhvm_vcpu_hostrestore(struct vcpu *v, struct cpu_user_regs *regs);
+int hvm_nestedhvm_vcpu_vmsave(struct vcpu *v, uint64_t vmcbaddr);
+int hvm_nestedhvm_vcpu_vmload(struct vcpu *v, uint64_t vmcbaddr);
+#define NESTEDHVM_VMRUN_INTERCEPT    (1U << 0) /* VMRUN intercept */
+#define NESTEDHVM_VMRUN_VMEXIT       (1U << 1) /* resume from VMEXIT */
+int hvm_nestedhvm_vcpu_vmrun(struct vcpu *v, struct cpu_user_regs *regs,
+                             unsigned int flags);
+int hvm_nestedhvm_vmcb_eventinject(struct vcpu *v, uint64_t exitcode);
+int hvm_nestedhvm_vmcb_prepare4vmrun(struct vcpu *v);
+int hvm_nestedhvm_vmcb_prepare4vmexit(struct vcpu *v);
+
 #endif /* __ASM_X86_HVM_HVM_H__ */