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Re: [Qemu-devel] [PATCH v1 4/5] kvm/x86: Hyper-V VMBus hypercall userspa
From: |
Pavel Fedin |
Subject: |
Re: [Qemu-devel] [PATCH v1 4/5] kvm/x86: Hyper-V VMBus hypercall userspace exit |
Date: |
Thu, 14 Jan 2016 11:30:43 +0300 |
Hello!
> --- a/Documentation/virtual/kvm/api.txt
> +++ b/Documentation/virtual/kvm/api.txt
> @@ -3359,6 +3359,14 @@ Hyper-V SynIC state change. Notification is used to
> remap SynIC
> event/message pages and to enable/disable SynIC messages/events processing
> in userspace.
>
> + /* KVM_EXIT_HYPERV_HCALL */
> + struct {
> + __u64 input;
> + __u64 params[2];
> + __u64 result;
> + } hv_hcall;
> +Indicates that the VCPU exits into userspace to process some guest
> +Hyper-V hypercalls.
Why introducing this? We already have KVM_EXIT_HYPERCALL, which is exactly the
same. AFAIK it's not used at the moment.
Additionally, in theory we could have hypercalls handled in userspace for
something else except HyperV. And not only for x86.
Kind regards,
Pavel Fedin
Senior Engineer
Samsung Electronics Research center Russia
- [Qemu-devel] [PATCH v1 0/5] KVM: Hyper-V VMBus hypercalls, Andrey Smetanin, 2016/01/12
- [Qemu-devel] [PATCH v1 3/5] kvm/x86: Pass return code of kvm_emulate_hypercall, Andrey Smetanin, 2016/01/12
- [Qemu-devel] [PATCH v1 1/5] kvm/x86: Rename Hyper-V long spin wait hypercall, Andrey Smetanin, 2016/01/12
- [Qemu-devel] [PATCH v1 2/5] drivers/hv: Move VMBus hypercall codes into Hyper-V UAPI header, Andrey Smetanin, 2016/01/12
- [Qemu-devel] [PATCH v1 5/5] kvm/x86: Reject Hyper-V hypercall continuation, Andrey Smetanin, 2016/01/12
- [Qemu-devel] [PATCH v1 4/5] kvm/x86: Hyper-V VMBus hypercall userspace exit, Andrey Smetanin, 2016/01/12
- Re: [Qemu-devel] [PATCH v1 4/5] kvm/x86: Hyper-V VMBus hypercall userspace exit,
Pavel Fedin <=
- Re: [Qemu-devel] [PATCH v1 4/5] kvm/x86: Hyper-V VMBus hypercall userspace exit, Paolo Bonzini, 2016/01/20
- Re: [Qemu-devel] [PATCH v1 4/5] kvm/x86: Hyper-V VMBus hypercall userspace exit, Pavel Fedin, 2016/01/20
- Re: [Qemu-devel] [PATCH v1 4/5] kvm/x86: Hyper-V VMBus hypercall userspace exit, 'Roman Kagan', 2016/01/20
- Re: [Qemu-devel] [PATCH v1 4/5] kvm/x86: Hyper-V VMBus hypercall userspace exit, Paolo Bonzini, 2016/01/20
- Re: [Qemu-devel] [PATCH v1 4/5] kvm/x86: Hyper-V VMBus hypercall userspace exit, 'Roman Kagan', 2016/01/20
- Re: [Qemu-devel] [PATCH v1 4/5] kvm/x86: Hyper-V VMBus hypercall userspace exit, Paolo Bonzini, 2016/01/20
Re: [Qemu-devel] [PATCH v1 4/5] kvm/x86: Hyper-V VMBus hypercall userspace exit, Paolo Bonzini, 2016/01/20