Re: [PATCH v10 0/7] KVM: VMX: Add Posted Interrupt supporting

[Gleb Natapov <gleb@redhat.com>]

On Thu, Apr 11, 2013 at 07:25:09PM +0800, Yang Zhang wrote:
> From: Yang Zhang <yang.z.zhang@Intel.com>
> 
> The follwoing patches are adding the Posted Interrupt supporting to KVM:
> The first patch enables the feature 'acknowledge interrupt on vmexit'.Since
> it is required by Posted interrupt, we need to enable it firstly.
> 
> And the subsequent patches are adding the posted interrupt supporting:
> Posted Interrupt allows APIC interrupts to inject into guest directly
> without any vmexit.
> 
> - When delivering a interrupt to guest, if target vcpu is running,
>   update Posted-interrupt requests bitmap and send a notification event
>   to the vcpu. Then the vcpu will handle this interrupt automatically,
>   without any software involvemnt.
> 
> - If target vcpu is not running or there already a notification event
>   pending in the vcpu, do nothing. The interrupt will be handled by
>   next vm entry
> 
Reviewed-by: Gleb Natapov <gleb@redhat.com>

> Changes from v9 to v10:
> * Only check kvm_apic_hw_enable() in vcpu_sacn_ioapic().
> * Remove repeated tracing in __apic_accept_irq().
> * Rebase on top of KVM upstream + RTC eoi tracking patch.
> 
> Changes from v8 to v9:
> * Add tracing in PI case when deliver interrupt.
> * Scan ioapic when updating SPIV register.
> * Rebase on top of KVM upstream + RTC eoi tracking patch.
> 
> Changes from v7 to v8:
> * Remove unused memeber 'on' from struct pi_desc.
> * Register a dummy function to sync_pir_to_irr is apicv is disabled.
> * Minor fixup.
> * Rebase on top of KVM upstream + RTC eoi tracking patch.
> 
> Yang Zhang (7):
>   KVM: VMX: Enable acknowledge interupt on vmexit
>   KVM: VMX: Register a new IPI for posted interrupt
>   KVM: VMX: Check the posted interrupt capability
>   KVM: Call common update function when ioapic entry changed.
>   KVM: Set TMR when programming ioapic entry
>   KVM: VMX: Add the algorithm of deliver posted interrupt
>   KVM: VMX: Use posted interrupt to deliver virtual interrupt
> 
>  arch/ia64/kvm/lapic.h              |    6 -
>  arch/x86/include/asm/entry_arch.h  |    4 +
>  arch/x86/include/asm/hardirq.h     |    3 +
>  arch/x86/include/asm/hw_irq.h      |    1 +
>  arch/x86/include/asm/irq_vectors.h |    5 +
>  arch/x86/include/asm/kvm_host.h    |    3 +
>  arch/x86/include/asm/vmx.h         |    4 +
>  arch/x86/kernel/entry_64.S         |    5 +
>  arch/x86/kernel/irq.c              |   22 ++++
>  arch/x86/kernel/irqinit.c          |    4 +
>  arch/x86/kvm/lapic.c               |   58 +++++++---
>  arch/x86/kvm/lapic.h               |    2 +
>  arch/x86/kvm/svm.c                 |   12 ++
>  arch/x86/kvm/vmx.c                 |  207 +++++++++++++++++++++++++++++++-----
>  arch/x86/kvm/x86.c                 |   19 +++-
>  include/linux/kvm_host.h           |    4 +-
>  virt/kvm/ioapic.c                  |   32 ++++--
>  virt/kvm/ioapic.h                  |    7 +-
>  virt/kvm/irq_comm.c                |    4 +-
>  virt/kvm/kvm_main.c                |    5 +-
>  20 files changed, 333 insertions(+), 74 deletions(-)

--
			Gleb.