Merge tag 'kvm-arm64/for-3.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git...

[~andy/linux] / arch / arm / include / asm / kvm_emulate.h

diff --git a/arch/arm/include/asm/kvm_emulate.h b/arch/arm/include/asm/kvm_emulate.h
index 708e4d8a647f226b4dbdf9722527edd33177912b..0fa90c962ac831329df43a156c5b0583732099ac 100644 (file)
--- a/arch/arm/include/asm/kvm_emulate.h
+++ b/arch/arm/include/asm/kvm_emulate.h
@@ -162,4 +162,50 @@ static inline unsigned long kvm_vcpu_get_mpidr(struct kvm_vcpu *vcpu)
        return vcpu->arch.cp15[c0_MPIDR];
 }
 
+static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
+{
+       *vcpu_cpsr(vcpu) |= PSR_E_BIT;
+}
+
+static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
+{
+       return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT);
+}
+
+static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
+                                                   unsigned long data,
+                                                   unsigned int len)
+{
+       if (kvm_vcpu_is_be(vcpu)) {
+               switch (len) {
+               case 1:
+                       return data & 0xff;
+               case 2:
+                       return be16_to_cpu(data & 0xffff);
+               default:
+                       return be32_to_cpu(data);
+               }
+       }
+
+       return data;            /* Leave LE untouched */
+}
+
+static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
+                                                   unsigned long data,
+                                                   unsigned int len)
+{
+       if (kvm_vcpu_is_be(vcpu)) {
+               switch (len) {
+               case 1:
+                       return data & 0xff;
+               case 2:
+                       return cpu_to_be16(data & 0xffff);
+               default:
+                       return cpu_to_be32(data);
+               }
+       }
+
+       return data;            /* Leave LE untouched */
+}
+
 #endif /* __ARM_KVM_EMULATE_H__ */