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

From: Wu, Feng
Date: Wed May 06 2015 - 22:05:38 EST


Hi Thomas,

Ping..

Since Liu Jiang's IRQ work has already been in the tip tree for a while, I think
It is time to send this series again based on the x86/apic branch of tip tree.
It would be very appreciated if you can have a look at this series!

Thanks,
Feng

> -----Original Message-----
> From: Wu, Feng
> Sent: Thursday, April 30, 2015 3:07 PM
> To: tglx@xxxxxxxxxxxxx; mingo@xxxxxxxxxx; hpa@xxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx; jiang.liu@xxxxxxxxxxxxxxx; Wu, Feng
> Subject: [v4 0/3] prerequisite changes for VT-d posted-interrupts
>
> 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:
> http://www.intel.com/content/www/us/en/intelligent-systems/intel-technolog
> y/vt-directed-io-spec.html
>
> 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
> VCPU
> 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(+)
>
> --
> 2.1.0

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