(Applies to kvm.git:66b0aed4, plus you will also need Davide Libenzi's eventfd_file_create() patch, which you can find here: http://www.mail-archive.com/kvm@xxxxxxxxxxxxxxx/msg13923.html You can find my complete tree with kvm.git, Davide's patch, and this series here: http://git.kernel.org/?p=linux/kernel/git/ghaskins/vbus/linux-2.6.git;a=shortlog;h=irqfd ---------------------- irqfd, v5 This series implements a mechanism called "irqfd". It lets you create an eventfd based file-desriptor to inject interrupts to a kvm guest. For more details, please see the prologue for patch 2/2. I am reasonably satisfied with this series, so Avi please consider for inclusion contingent on Davide formally submitting his eventfd_file_create() patch (and pending any new review comments, of course). [ Changelog: v5: *) Added padding to the ioctl structure *) Added proper ref-count increment to the file before returning success. (Needs review by Al Viro, Davide Libenzi) *) Cleaned up error-handling path to make sure we remove ourself from the waitq if necessary. *) Make sure we only add ourselves to kvm->irqfds if successful creating the irqfd in the first place. *) Rebased to kvm.git:66b0aed4 v4: *) Changed allocation model to create the new fd last, after we get past the last potential error point by using Davide's new eventfd_file_create interface (Al Viro, Davide Libenzi) *) We no longer export sys_eventfd2() since it is replaced functionally with eventfd_file_create(); *) Rebased to kvm.git:7da2e3ba v3: *) The kernel now allocates the eventfd (need to export sys_eventfd2) *) Added a flags field for future expansion to kvm_irqfd() *) We properly toggle the irq level 1+0. *) We re-use the USERSPACE_SRC_ID instead of creating our own *) Properly check for failures establishing a poll-table with eventfd *) Fixed fd/file leaks on failure *) Rebased to lateste kvm.git::41b76d8d04 v2: *) Dropped notifier_chain based callbacks in favor of wait_queue_t::func and file::poll based callbacks (Thanks to Davide for the suggestion) v1: *) Initial release -------- We do not have a user of this interface in this series, though note future version of virtual-bus (v4 and above) will be based on this. Note that this series requires userspace patches for qemu-kvm.git, v3, which you can find here: http://patchwork.kernel.org/patch/20213/ -Greg --- Gregory Haskins (2): kvm: add support for irqfd via eventfd-notification interface eventfd: export eventfd interfaces for module use arch/x86/kvm/Makefile | 2 - arch/x86/kvm/x86.c | 1 fs/eventfd.c | 4 + include/linux/kvm.h | 8 ++ include/linux/kvm_host.h | 4 + virt/kvm/irqfd.c | 163 ++++++++++++++++++++++++++++++++++++++++++++++ virt/kvm/kvm_main.c | 11 +++ 7 files changed, 192 insertions(+), 1 deletions(-) create mode 100644 virt/kvm/irqfd.c -- -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
