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authorPaolo Bonzini <pbonzini@redhat.com>2013-11-11 12:05:20 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2013-11-11 12:05:20 +0100
commitede582224231e64e41af0f89117a302580a2da2e (patch)
tree50c28a6d8b9b7c3ae2f6822bd548b84853e7ec09 /arch/arm/include/asm/kvm_emulate.h
parent6da8ae556c11bb3b832dcc0bd077c2d563f5583f (diff)
parentce94fe93d566bf381c6ecbd45010d36c5f04d692 (diff)
Merge tag 'kvm-arm64/for-3.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into kvm-next
A handful of fixes for KVM/arm64: - A couple a basic fixes for running BE guests on a LE host - A performance improvement for overcommitted VMs (same as the equivalent patch for ARM) Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Conflicts: arch/arm/include/asm/kvm_emulate.h arch/arm64/include/asm/kvm_emulate.h
Diffstat (limited to 'arch/arm/include/asm/kvm_emulate.h')
-rw-r--r--arch/arm/include/asm/kvm_emulate.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/arm/include/asm/kvm_emulate.h b/arch/arm/include/asm/kvm_emulate.h
index 708e4d8a647f..0fa90c962ac8 100644
--- 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__ */