On 01.02.2018 14:48, Roman Kagan wrote: > Make it possible for guests using Hyper-V emulation to do guest->host > notification via EVENT_SIGNAL hypercall without a user exit. > > Special thanks to David Hildenbrand for going through the spec with me > to figure out the desired behavior. > > v8 -> v9: > - pass events with non-zero FlagNumber to userspace > > v7 -> v8: > - rebase to latest master > > v6 -> v7: > - reject non-zero flag number as invalid > - adjust error returns to better match the spec > > v5 -> v6: > - drop unnecessary srcu_read_lock/unlock, and clean up after that > > v4 -> v5: > - fix block comment formatting > > 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/include/uapi/asm/hyperv.h | 2 + > arch/x86/kvm/hyperv.h | 4 ++ > include/uapi/linux/kvm.h | 13 +++++ > arch/x86/kvm/hyperv.c | 112 ++++++++++++++++++++++++++++++++++++- > arch/x86/kvm/x86.c | 13 ++++- > 7 files changed, 175 insertions(+), 2 deletions(-) > Looks good to me! -- Thanks, David / dhildenb
