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[Qemu-devel] [PATCH v2 0/9] Hyper-V synthetic interrupt controller
From: |
Denis V. Lunev |
Subject: |
[Qemu-devel] [PATCH v2 0/9] Hyper-V synthetic interrupt controller |
Date: |
Fri, 16 Oct 2015 10:07:44 +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>
Changes v2:
* irqchip/eventfd preparation improvements to support
arch specific routing entries like Hyper-V SynIC ones.
* add Hyper-V SynIC vectors into EOI exit bitmap.
* do not use posted interrupts in case of Hyper-V SynIC
AutoEOI vectors
- [Qemu-devel] [PATCH v2 0/9] Hyper-V synthetic interrupt controller,
Denis V. Lunev <=
- [Qemu-devel] [PATCH 2/9] kvm/eventfd: factor out kvm_notify_acked_gsi(), Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 1/9] kvm/eventfd: avoid loop inside irqfd_update(), Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 4/9] kvm/irqchip: allow only multiple irqchip routes per GSI, Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 5/9] kvm/irqchip: kvm_arch_irq_routing_update renaming split, Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 3/9] kvm/eventfd: add arch-specific set_irq, Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 6/9] drivers/hv: share Hyper-V SynIC constants with userspace, Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 7/9] kvm/x86: split ioapic-handled and EOI exit bitmaps, Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 9/9] kvm/x86: Hyper-V kvm exit, Denis V. Lunev, 2015/10/16