On 08/05/14 11:06, Peter Maydell wrote:
> On 8 May 2014 10:32, Marc Zyngier <marc.zyngier@xxxxxxx> wrote:
>> +int kvm_cpu__get_endianness(struct kvm_cpu *vcpu)
>> +{
>> + struct kvm_one_reg reg;
>> + u64 psr;
>> + u64 sctlr;
>> +
>> + /*
>> + * Quoting the definition given by Peter Maydell:
>> + *
>> + * "Endianness of the CPU which does the virtio reset at the
>> + * point when it does that reset"
>> + *
>> + * We first check for an AArch32 guest: its endianness can
>> + * change when using SETEND, which affects the CPSR.E bit.
>> + *
>> + * If we're AArch64, use SCTLR_EL1.E0E if access comes from
>> + * EL0, and SCTLR_EL1.EE if access comes from EL1.
>> + */
>
> I note that the set of checks described here match the logic
> of the ARM ARM BigEndian() pseudocode function, which is
> a good sign.
Pure luck. Or maybe I'm now going slightly mad. Either way, consistency
is good... ;-)
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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