On 07/01/2019 10:52, Jan Beulich wrote:
>> diff --git a/xen/lib/x86/cpuid.c b/xen/lib/x86/cpuid.c
>> index 5a3159b..7fc4148 100644
>> --- a/xen/lib/x86/cpuid.c
>> +++ b/xen/lib/x86/cpuid.c
>> @@ -233,6 +233,112 @@ int x86_cpuid_copy_to_buffer(const struct cpuid_policy
>> *p,
>> return 0;
>> }
>>
>> +int x86_cpuid_copy_from_buffer(struct cpuid_policy *p,
>> + const cpuid_leaf_buffer_t leaves,
>> + uint32_t nr_entries, uint32_t *err_leaf,
>> + uint32_t *err_subleaf)
>> +{
>> + unsigned int i;
>> + xen_cpuid_leaf_t data;
>> + struct cpuid_leaf *l = (void *)&data.a;
> I'd find this cast a little less worrying if you used container_of(). But
> even then I dislike this well hidden assumption of similar layouts
> of struct cpuid_leaf and the latter parts of struct xen_cpuid_leaf.
>
> Also it looks as if this could be a pointer to const.
I've found a different way of doing this which actually compiles smaller
(contrary to expectation).
>> + /*
>> + * A well formed caller is expected pass an array with leaves in order,
> ... expected to pass ...
Fixed.
~Andrew
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