x86: provide an init_mem_mapping hypervisor hook

[karo-tx-linux.git] / arch / x86 / include / asm / hypervisor.h

diff --git a/arch/x86/include/asm/hypervisor.h b/arch/x86/include/asm/hypervisor.h
index 21126155a739f4a3495499f052abcd3eab5a0bb7..0ead9dbb91301d0f7f8923dcf33f25515bd182b8 100644 (file)
--- a/arch/x86/include/asm/hypervisor.h
+++ b/arch/x86/include/asm/hypervisor.h
@@ -43,6 +43,9 @@ struct hypervisor_x86 {
 
        /* pin current vcpu to specified physical cpu (run rarely) */
        void            (*pin_vcpu)(int);
+
+       /* called during init_mem_mapping() to setup early mappings. */
+       void            (*init_mem_mapping)(void);
 };
 
 extern const struct hypervisor_x86 *x86_hyper;
@@ -57,8 +60,15 @@ extern const struct hypervisor_x86 x86_hyper_kvm;
 extern void init_hypervisor_platform(void);
 extern bool hypervisor_x2apic_available(void);
 extern void hypervisor_pin_vcpu(int cpu);
+
+static inline void hypervisor_init_mem_mapping(void)
+{
+       if (x86_hyper && x86_hyper->init_mem_mapping)
+               x86_hyper->init_mem_mapping();
+}
 #else
 static inline void init_hypervisor_platform(void) { }
 static inline bool hypervisor_x2apic_available(void) { return false; }
+static inline void hypervisor_init_mem_mapping(void) { }
 #endif /* CONFIG_HYPERVISOR_GUEST */
 #endif /* _ASM_X86_HYPERVISOR_H */