(Applies to kvm.git/master:c27b64a0) This is v8 of the series. For more details, please see the header to patch 3/3. This series has been tested against the kvm-eventfd unit test, and appears to be functioning properly. You can download this test here: ftp://ftp.novell.com/dev/ghaskins/kvm-eventfd.tar.bz2 Please consider for inclusion to kvm.git An updated userspace for qemu-kvm.git is forthcoming. [ Changelog: v8: *) Addressed Avi's review comments: *) Simplified the unregister_dev logic in patch 1/3 *) Implemented a per-vm io-device limit (patch 2/3) *) Removed spurious whitespace hunk *) changed the data-match from a void* to a u64 *) check group-length violations before wildcarding v7: *) Implemented a resource limit (CONFIG_KVM_MAX_IOSIGNALFD_ITEMS) to limit malicious/broken userspace from consuming arbitrary kernel memory. *) Rebased to kvm.git/master:c27b64a0, which already includes Marcelo's irq-lock rework. v6: *) Removed "FIXME?" comment on choice over RCU vs SRCU after discussion/numbers from Paul. I think RCU is fine to use for now based on the conversation. We can always convert it later if need be. *) Fixed the "group" free path to eliminate an RCU related race *) Fixed a memory/eventfd leak on shutdown for any iosignalfd's which were still active at the time the guest shuts down. *) Beefed up comments *) Rebased to kvm.git/master:0281e88f + irq locking rework and verified that kvm-eventfd unit test still passes. v5: *) Removed "cookie" field, which was a misunderstanding on my part on what Avi wanted for a data-match feature *) Added a new "trigger" data-match feature which I think is much closer to what we need. *) We retain the dev_count field in the io_bus infrastructure and instead back-fill the array on removal. *) Various minor cleanups *) Rebased to kvm.git/master:25deed73 v4: *) Fixed a bug in the original 2/4 where the PIT failure case would potentially leave the io_bus components registered. *) Condensed the v3 2/4 and 3/4 into one patch (2/2) since the patches became interdependent with the fix described above *) Rebased to kvm.git/master:74dfca0a v3: *) fixed patch 2/4 to handle error cases instead of BUG_ON *) implemented same HAVE_EVENTFD protection mechanism as irqfd to prevent compilation errors on unsupported arches *) completed testing *) rebased to kvm.git/master:7391a6d5 v2: *) added optional data-matching capability (via cookie field) *) changed name from iofd to iosignalfd *) added io_bus unregister function *) implemented deassign feature v1: *) original release (integrated into irqfd v7 series as "iofd") ] --- Gregory Haskins (3): KVM: add iosignalfd support KVM: add per-vm limit on the maximum number of io-devices supported KVM: make io_bus interface more robust arch/x86/kvm/Kconfig | 8 + arch/x86/kvm/i8254.c | 23 ++ arch/x86/kvm/i8259.c | 9 + arch/x86/kvm/x86.c | 1 include/linux/kvm.h | 15 ++ include/linux/kvm_host.h | 19 ++ virt/kvm/coalesced_mmio.c | 8 + virt/kvm/eventfd.c | 426 +++++++++++++++++++++++++++++++++++++++++++++ virt/kvm/ioapic.c | 9 + virt/kvm/kvm_main.c | 42 ++++ 10 files changed, 545 insertions(+), 15 deletions(-) -- Signature -- 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
