[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 0/2] Hyper-V synthetic interrupt controller
From: |
Denis V. Lunev |
Subject: |
[Qemu-devel] [PATCH 0/2] Hyper-V synthetic interrupt controller |
Date: |
Fri, 9 Oct 2015 16:39:46 +0300 |
This patchset implements the KVM part of the synthetic interrupt
controller (synic) which is a building block of the Hyper-V
paravirtualized device bus (vmbus).
Synic is a lapic extension, which is controlled via MSRs and maintains
for each vCPU
- 16 synthetic interrupt "lines" (SINT's); each can be configured to
trigger a specific interrupt vector optionally with auto-EOI
semantics
- a message page in the guest memory with 16 256-byte per-SINT message
slots
- an event flag page in the guest memory with 16 2048-bit per-SINT
event flag areas
The host triggers a SINT whenever it delivers a new message to the
corresponding slot or flips an event flag bit in the corresponding area.
The guest informs the host that it can try delivering a message by
explicitly asserting EOI in lapic or writing to End-Of-Message (EOM)
MSR.
The userspace (qemu) triggers interrupts and receives EOM notifications
via irqfd with resampler; for that, a GSI is allocated for each
configured SINT, and irq_routing api is extended to support GSI-SINT
mapping.
Besides, a new vcpu exit is introduced to notify the userspace of the
changes in synic configuraion triggered by guest writing to the
corresponding MSRs.
Signed-off-by: Andrey Smetanin <address@hidden>
Reviewed-by: Roman Kagan <address@hidden>
Signed-off-by: Denis V. Lunev <address@hidden>
CC: Vitaly Kuznetsov <address@hidden>
CC: "K. Y. Srinivasan" <address@hidden>
CC: Gleb Natapov <address@hidden>
CC: Paolo Bonzini <address@hidden>
- [Qemu-devel] [PATCH 0/2] Hyper-V synthetic interrupt controller,
Denis V. Lunev <=
- [Qemu-devel] [PATCH 1/2] kvm/x86: Hyper-V synthetic interrupt controller, Denis V. Lunev, 2015/10/09
- Re: [Qemu-devel] [PATCH 1/2] kvm/x86: Hyper-V synthetic interrupt controller, Paolo Bonzini, 2015/10/09
- Re: [Qemu-devel] [PATCH 1/2] kvm/x86: Hyper-V synthetic interrupt controller, Christian Borntraeger, 2015/10/15
- Re: [Qemu-devel] [PATCH 1/2] kvm/x86: Hyper-V synthetic interrupt controller, Cornelia Huck, 2015/10/12
- Re: [Qemu-devel] [PATCH 1/2] kvm/x86: Hyper-V synthetic interrupt controller, Paolo Bonzini, 2015/10/12
- Re: [Qemu-devel] [PATCH 1/2] kvm/x86: Hyper-V synthetic interrupt controller, Roman Kagan, 2015/10/12
[Qemu-devel] [PATCH 2/2] kvm/x86: Hyper-V kvm exit, Denis V. Lunev, 2015/10/09