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Commit 27f194fd authored by Victor Kamensky's avatar Victor Kamensky Committed by Christoffer Dall
Browse files

ARM: KVM: MMIO support BE host running LE code 



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: default avatarVictor Kamensky <victor.kamensky@linaro.org>
Reviewed-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 1c9f0471

arch/arm/include/asm/kvm_emulate.h

+18 −4
Original line number Original line Diff line number Diff line
@@ -185,9 +185,16 @@ static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu, 
		default:

		default:

			return be32_to_cpu(data);

			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,

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:

		default:

			return cpu_to_be32(data);

			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__ */
 
#endif /* __ARM_KVM_EMULATE_H__ */