Re: [PATCH] examples/ethtool: include case for 64-bit registers

[Zyta Szpak <zr@semihalf.com>]

Hi,
sorry on my late reply I was on sick leave. Sure I can do that. This fix 
was the fastest possible without interfering with DPDK API. I will add 
the callback then.

Regards,
Zyta Szpak

On 20.05.2016 10:25, Remy Horton wrote:
> Morning,
>
> On 11/05/2016 11:48, zr@semihalf.com wrote:
>> From: Zyta Szpak <zyta.szpak@semihalf.com>
>>
>> rte_eth_dev_get_reg_length and rte_eth_dev_get_reg callbacks
>> do not provide register size to the app in any way. Example assuming
>> they are 32-bit wide always allocates not enough memory if the
>> registers are 64-bit wide. It results in memory corruption.
>> This commit is a quick fix to make enough room for 64-bit
>> register values when this returned value is given to malloc.
> [..]
>
> This is a loose end that needs to be fixed but my feeling is that it 
> ought to be done via querying the driver rather than overstating 
> register bank size. My suggestion would be to add something like 
> get_reg_wordsize to struct eth_dev_ops and then to use sizeof(uint32) 
> as fallback for drivers that don't implement the callback.
>
> Regards,
>
> ..Rémy