[RFC 04/10] x86/vpmu: separate AMD-V and Intel VT-x init arch_vpmu_ops initializers

[Xenia Ragiadakou <burzalodowa@xxxxxxxxx>]

The function core2_vpmu_init() is VT-x specific while the functions
amd_vpmu_init() and hygon_vpmu_init() are AMD-V specific, thus need to be
guarded with INTEL_VMX and AMD_SVM, respectively.
Instead of adding #ifdef guards around the function calls in common vpu code,
implement them as static inline null-returning functions when the respective
technology is not enabled.

No functional change intended.

Signed-off-by: Xenia Ragiadakou <burzalodowa@xxxxxxxxx>
---
 xen/arch/x86/include/asm/vpmu.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/xen/arch/x86/include/asm/vpmu.h b/xen/arch/x86/include/asm/vpmu.h
index 05e1fbfccf..1e08afb7af 100644
--- a/xen/arch/x86/include/asm/vpmu.h
+++ b/xen/arch/x86/include/asm/vpmu.h
@@ -53,9 +53,18 @@ struct arch_vpmu_ops {
 #endif
 };
 
+#ifdef CONFIG_INTEL_VMX
 const struct arch_vpmu_ops *core2_vpmu_init(void);
+#else
+static inline const struct arch_vpmu_ops *core2_vpmu_init(void) { return NULL; 
}
+#endif /* CONFIG_INTEL_VMX */
+#ifdef CONFIG_AMD_SVM
 const struct arch_vpmu_ops *amd_vpmu_init(void);
 const struct arch_vpmu_ops *hygon_vpmu_init(void);
+#else
+static inline const struct arch_vpmu_ops *amd_vpmu_init(void) { return NULL; }
+static inline const struct arch_vpmu_ops *hygon_vpmu_init(void) { return NULL; 
}
+#endif /* CONFIG_AMD_SVM */
 
 struct vpmu_struct {
     u32 flags;
-- 
2.37.2