Re: [Xen-devel] [RFC PATCH 4/4] msi: taking interrupt format into consideration during judging a pirq is binded with a event channel

[Chao Gao <chao.gao@xxxxxxxxx>]

On Thu, Mar 30, 2017 at 06:29:29PM +0100, Anthony PERARD wrote:
>On Fri, Mar 17, 2017 at 07:29:17PM +0800, Lan Tianyu wrote:
>> From: Chao Gao <chao.gao@xxxxxxxxx>
>> Subject: msi: taking interrupt format into consideration during
>> judging a pirq is binded with a event channel
>
>This is quite a long title, I think we can make it shorter. Maybe "msi:
>Handle MSI remapping format.

OK.

>
>>      data = pci_get_word(dev->config + msi_data_off(dev, msi64bit));
>> -    if (xen_is_pirq_msi(data)) {
>> +    addr_lo = pci_get_word(dev->config + msi_address_lo_off(dev));
>
>This could be get_long, so addr_lo will actually have the all low bits
>of the addr.

yes.

>
>> +int xen_is_pirq_msi(uint32_t msi_data, uint32_t msi_addr_lo)
>>  {
>> +    /* If msi address is configurate to remapping format, the msi will not
>> +     * remapped into a pirq.
>> +     */
>> +    if ( msi_addr_lo & 0x10 )
>
>That's a magic number, is 0x10 MSI_ADDR_IM_MASK?

Yes.

Really thanks for your comments.

>
>Thanks,
>
>-- 
>Anthony PERARD

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