On 13/05/14 17:14, Victor Kamensky wrote:
> In case of guest CPU running in 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@xxxxxxxxxx>
> Reviewed-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
> ---
> arch/arm64/include/asm/kvm_emulate.h | 22 ++++++++++++++++++++++
> 1 file changed, 22 insertions(+)
>
> diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
> index dd8ecfc..fdc3e21 100644
> --- a/arch/arm64/include/asm/kvm_emulate.h
> +++ b/arch/arm64/include/asm/kvm_emulate.h
> @@ -213,6 +213,17 @@ static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
> default:
> return be64_to_cpu(data);
> }
> + } else {
> + switch (len) {
> + case 1:
> + return data & 0xff;
> + case 2:
> + return le16_to_cpu(data & 0xffff);
> + case 4:
> + return le32_to_cpu(data & 0xffffffff);
> + default:
> + return le64_to_cpu(data);
> + }
> }
>
> return data; /* Leave LE untouched */
> @@ -233,6 +244,17 @@ static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
> default:
> return cpu_to_be64(data);
> }
> + } else {
> + switch (len) {
> + case 1:
> + return data & 0xff;
> + case 2:
> + return cpu_to_le16(data & 0xffff);
> + case 4:
> + return cpu_to_le32(data & 0xffffffff);
> + default:
> + return cpu_to_le64(data);
> + }
> }
>
> return data; /* Leave LE untouched */
>
Reviewed-by: Marc Zyngier <marc.zyngier@xxxxxxx>
M.
--
Jazz is not dead. It just smells funny...
_______________________________________________
kvmarm mailing list
kvmarm@xxxxxxxxxxxxxxxxxxxxx
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
