Am 16.04.2012 12:13, schrieb Avi Kivity:
> On 04/15/2012 09:38 PM, Andreas Färber wrote:
>> From: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
>>
>> On target-ppc, our table of CPU types and features encodes the features as
>> found on the hardware, regardless of whether these features are actually
>> usable under TCG or KVM. We already have cases where the information from
>> the cpu table must be fixed up to account for limitations in the emulation
>> method we're using. e.g. TCG does not support the DFP and VSX instructions
>> and KVM needs different numbering of the CPUs in order to tell it the
>> correct thread to core mappings.
>>
>> This patch cleans up these hacks to handle emulation limitations by
>> consolidating them into a pair of functions specifically for the purpose.
>>
>> env->check_pow = def->check_pow;
>> +
>> + if (kvm_enabled()) {
>> + if (kvmppc_fixup_cpu(env) != 0) {
>> + fprintf(stderr, "Unable to virtualize selected CPU with KVM\n");
>> + exit(1);
>> + }
>> + } else {
>> + if (ppc_fixup_cpu(env) != 0) {
>> + fprintf(stderr, "Unable to emulate selected CPU with TCG\n");
>> + exit(1);
>> + }
>> + }
>> +
>>
>
> I wish we had an error like that for x86. Right now we silently add and
> drop cpu features.
x86 has an ,+enforce option for that, doesn't it?
Andreas
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