Make it possible for guests using Hyper-V emulation to do guest->host notification via EVENT_SIGNAL hypercall without a user exit. v3 -> v4: - switch to kvm_vcpu_read_guest and take srcu_read_lock around it - rework and document the interpretation of the hypercall parameter - merge !fast version into kvm_hvcall_signal_event for brevity v2 -> v3: - expand docs on allowed values and return codes - fix uninitialized return - style fixes v1 -> v2: - make data types consistent - get by without the recently dropped struct hv_input_signal_event - fix subject prefixes Roman Kagan (2): kvm: x86: factor out kvm.arch.hyperv (de)init kvm: x86: hyperv: guest->host event signaling via eventfd Documentation/virtual/kvm/api.txt | 31 ++++++++++ arch/x86/include/asm/kvm_host.h | 2 + arch/x86/kvm/hyperv.h | 4 ++ include/uapi/linux/kvm.h | 13 +++++ arch/x86/kvm/hyperv.c | 117 +++++++++++++++++++++++++++++++++++++- arch/x86/kvm/x86.c | 13 ++++- 6 files changed, 178 insertions(+), 2 deletions(-) -- 2.14.3
