On 06/23/2009 11:56 AM, Michael S. Tsirkin wrote:
On Thu, Jun 18, 2009 at 08:30:46PM -0400, Gregory Haskins wrote:+static int +iosignalfd_group_in_range(struct kvm_io_device *this, gpa_t addr, int len, + int is_write) +{ + struct _iosignalfd_group *p = to_group(this); + + return ((addr>= p->addr&& (addr< p->addr + p->length))); +}I think I see a problem here. For virtio, we do not necessarily want all virtqueues for a device to live in kernel: there might be control virtqueues that we want to leave in userspace. Since this claims all writes to a specific address, the signal never makes it to userspace.
Userspace could create an eventfd for this control queue and wait for it to fire.
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