On Wed, Feb 18, 2009 at 10:45:19AM +0000, Avi Kivity wrote:
> Sheng Yang wrote:
>> index a2dfbe0..78480d0 100644
>> --- a/include/linux/kvm.h
>> +++ b/include/linux/kvm.h
>> @@ -440,6 +440,9 @@ struct kvm_irq_routing {
>> };
>> #endif
>> +#if defined(CONFIG_X86)
>> +#define KVM_CAP_DEVICE_MSIX 26
>> +#endif
>>
>
> We switched to a different way of depending on CONFIG_X86, see the other
> KVM_CAP defines.
Thanks to point it out. :)
>
>> struct kvm_assigned_msix_nr {
>> __u32 assigned_dev_id;
>> __u16 entry_nr;
>> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
>> index 4010802..d3acb37 100644
>> --- a/virt/kvm/kvm_main.c
>> +++ b/virt/kvm/kvm_main.c
>> @@ -280,13 +280,33 @@ static void kvm_free_assigned_irq(struct kvm *kvm,
>> * now, the kvm state is still legal for probably we also have to wait
>> * interrupt_work done.
>> */
>> - disable_irq_nosync(assigned_dev->host_irq);
>> - cancel_work_sync(&assigned_dev->interrupt_work);
>> + if (assigned_dev->irq_requested_type & KVM_ASSIGNED_DEV_MSIX) {
>> + int i;
>> + for (i = 0; i < assigned_dev->entries_nr; i++)
>> + disable_irq_nosync(assigned_dev->
>> + host_msix_entries[i].vector);
>> +
>> + cancel_work_sync(&assigned_dev->interrupt_work);
>> +
>> + for (i = 0; i < assigned_dev->entries_nr; i++)
>> + free_irq(assigned_dev->host_msix_entries[i].vector,
>> + (void *)assigned_dev);
>> +
>> + assigned_dev->entries_nr = 0;
>> + kfree(assigned_dev->host_msix_entries);
>> + kfree(assigned_dev->guest_msix_entries);
>> + pci_disable_msix(assigned_dev->dev);
>> + } else {
>> + /* Deal with MSI and INTx */
>> + disable_irq_nosync(assigned_dev->host_irq);
>> + cancel_work_sync(&assigned_dev->interrupt_work);
>>
>
> How about always have an array? That will also allow us to deal with
> INTx where x=B,C,D.
>
> Currently for MSI and INTx the array will hold just one active element.
So array, or bitmap? I remember I changed it to bitmap accounding to your
first comment...
OK. I think array is reasonable, but the length is a problem, as I did before.
How long would you like?
--
regards
Yang, Sheng
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