Re: [PATCH v1 2/3] s390: define UV compatible I/O allocation

[Pierre Morel <pmorel@linux.ibm.com>]

On 2020-09-11 14:40, Cornelia Huck wrote:
> On Mon, 31 Aug 2020 14:05:32 +0200
> Pierre Morel <pmorel@linux.ibm.com> wrote:
> 
>> To centralize the memory allocation for I/O we define
>> the alloc/free_io_page() functions which share the I/O
>> memory with the host in case the guest runs with
>> protected virtualization.

...

>> +
>> +void *alloc_io_page(int size)
>> +{
>> +	void *p;
>> +
>> +	assert(size <= PAGE_SIZE);
>> +	p = alloc_page();
> 
> I see that you use this for some I/O structures in the next patch. Is
> this guaranteed to be under 2G all the time?
> 

Good catch.
I forgot that I already worked on this problem a while ago, I will 
rework the allocation.

Thanks,
Pierre

-- 
Pierre Morel
IBM Lab Boeblingen