[v4 0/3] prerequisite changes for VT-d posted-interrupts

From: Feng Wu
Date: Thu Apr 30 2015 - 03:15:02 EST

VT-d Posted-Interrupts is an enhancement to CPU side Posted-Interrupt.
With VT-d Posted-Interrupts enabled, external interrupts from
direct-assigned devices can be delivered to guests without VMM
intervention when guest is running in non-root mode.

You can find the VT-d Posted-Interrtups Spec. in the following URL:

This series implement some prerequisite parts for VT-d posted-interrupts. It was part of
http://thread.gmane.org/gmane.linux.kernel.iommu/7708. To make things clear, I will divide
the whole series which contain multiple components into three parts:
- prerequisite changes (included in this series)
- IOMMU part (v4 was reviewed, some comments need to be addressed)
- KVM and VFIO parts (will send out this part once the first two parts are accepted)

This series is rebased on the x86-apic branch of tip tree.

Feng Wu (3):
genirq: Introduce irq_set_vcpu_affinity() to target an interrupt to a
x86, irq: Implement irq_set_vcpu_affinity for pci_msi_ir_controller
x86, irq: Define a global vector for VT-d Posted-Interrupts

arch/x86/include/asm/entry_arch.h | 2 ++
arch/x86/include/asm/hardirq.h | 1 +
arch/x86/include/asm/hw_irq.h | 2 ++
arch/x86/include/asm/irq_vectors.h | 1 +
arch/x86/kernel/apic/msi.c | 1 +
arch/x86/kernel/entry_64.S | 2 ++
arch/x86/kernel/irq.c | 27 +++++++++++++++++++++++++++
arch/x86/kernel/irqinit.c | 2 ++
include/linux/irq.h | 6 ++++++
kernel/irq/chip.c | 14 ++++++++++++++
kernel/irq/manage.c | 20 ++++++++++++++++++++
11 files changed, 78 insertions(+)


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