On 09/22/2011 12:04 PM, Jan Kiszka wrote:
> goto out;
>
> + if (!kvm_check_extension(kvm_state, KVM_CAP_ASSIGN_DEV_IRQ)&&
> + (dev->cap.available& ASSIGNED_DEVICE_CAP_MSIX ||
> + dev->cap.available& ASSIGNED_DEVICE_CAP_MSI ||
> + assigned_dev_pci_read_byte(pci_dev, PCI_INTERRUPT_PIN) != 0)) {
> + goto out;
> + }
> +
That's not equivalent as it needlessly prevents IRQ support in the
absence of KVM_CAP_ASSIGN_DEV_IRQ.
Let's just fix the core issue and replace the test for
KVM_CAP_DEVICE_MSIX with a test call of KVM_ASSIGN_SET_MSIX_NR, passing
in a NULL struct. If it returns -EFAULT, the IOCTL is known and MSIX is
supported.
Or just add KVM_CAP_DEVICE_MSIX to the kernel and backport it where needed?
--
error compiling committee.c: too many arguments to function
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