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ARM: KVM: MMIO support BE host running LE code

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In case of status register E bit is not set (LE mode) and host runs in
BE mode we need byteswap data, so read/write is emulated correctly.

Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Victor Kamensky 2014-06-12 09:30:05 -07:00 committed by Christoffer Dall
parent 1c9f04717c
commit 27f194fd36
1 changed files with 18 additions and 4 deletions
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22
arch/arm/include/asm/kvm_emulate.h
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@ -185,9 +185,16 @@ static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
default:
return be32_to_cpu(data);
}
} else {
switch (len) {
case 1:
return data & 0xff;
case 2:
return le16_to_cpu(data & 0xffff);
default:
return le32_to_cpu(data);
}
}
return data; /* Leave LE untouched */
}
static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
@ -203,9 +210,16 @@ static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
default:
return cpu_to_be32(data);
}
} else {
switch (len) {
case 1:
return data & 0xff;
case 2:
return cpu_to_le16(data & 0xffff);
default:
return cpu_to_le32(data);
}
}
return data; /* Leave LE untouched */
}
#endif /* __ARM_KVM_EMULATE_H__ */