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Message-Id: <1432011454-4057-1-git-send-email-feng.wu@intel.com>
Date: Tue, 19 May 2015 12:57:30 +0800
From: Feng Wu <feng.wu@...el.com>
To: tglx@...utronix.de, mingo@...hat.com, hpa@...or.com
Cc: linux-kernel@...r.kernel.org, jiang.liu@...ux.intel.com,
Feng Wu <feng.wu@...el.com>
Subject: [v6 0/4] 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-technology/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.
v5 --> v6:
[3/4]:
- Avoid the conditional in the exception handler smp_kvm_posted_intr_wakeup_ipi().
- Rename "wakeup_handler_callback" to "kvm_posted_intr_wakeup_handler".
[4/4]
- Newly added in this series, show the statistics information for posted-interrupts.
v4 --> v5:
- Move the declaration of "irq_chip_set_vcpu_affinity_parent()" to [1/3].
- Use the accessor to get "struct irq_data", "struct irq_chip".
- Use "irq_get_desc_lock()" instead of "irq_to_desc()".
- Declare "wakeup_handler_callback" in "asm/irq.h".
- Use entering_ack_irq()/exiting_irq() in smp_kvm_posted_intr_wakeup_ipi().
Feng Wu (3):
x86/irq: Implement irq_set_vcpu_affinity for pci_msi_ir_controller
x86/irq: Define a global vector for VT-d Posted-Interrupts
x86/irq: Show statistics information for posted-interrupts
Jiang Liu (1):
genirq: Introduce irq_set_vcpu_affinity() to target an interrupt to a
VCPU
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.h | 4 ++++
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 | 43 ++++++++++++++++++++++++++++++++++++++
arch/x86/kernel/irqinit.c | 2 ++
include/linux/irq.h | 6 ++++++
kernel/irq/chip.c | 14 +++++++++++++
kernel/irq/manage.c | 21 +++++++++++++++++++
12 files changed, 99 insertions(+)
--
2.1.0
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