Re: [Xen-devel] [PATCH v2 0/5] Add posted interrupt supporting

[Keir Fraser <keir.xen@xxxxxxxxx>]

On 17/04/2013 07:50, "Yang Zhang" <yang.z.zhang@xxxxxxxxx> wrote:

> From: Yang Zhang <yang.z.zhang@xxxxxxxxx>

The whole series:

Acked-by: Keir Fraser <keir@xxxxxxx>

> The follwoing patches are adding the Posted Interrupt supporting to Xen:
> Posted Interrupt allows vAPIC 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
> 
> Refer to Intel SDM vol3, 29.6  to get more information.
> 
> Changes from v1 to v2:
> * Allocate posted interrupt vector dynamically.
> * Use vlapic_set_vector() to sync pir to irr.
> * Refine vlapic_set_irq() and call it to deliver virtual interrupt.
> * Rebase on top of Xen.
> 
> Yang Zhang (5):
>   VMX: Detect posted interrupt capability
>   VMX: Turn on posted interrupt bit in vmcs
>   VMX: Add posted interrupt supporting
>   Call vlapic_set_irq() to delivery virtual interrupt
>   VMX: Use posted interrupt to deliver virutal interrupt
> 
>  xen/arch/x86/hvm/vioapic.c                     |    3 +-
>  xen/arch/x86/hvm/vlapic.c                      |   38 +++++---------
>  xen/arch/x86/hvm/vmsi.c                        |    3 +-
>  xen/arch/x86/hvm/vmx/vmcs.c                    |   18 ++++++-
>  xen/arch/x86/hvm/vmx/vmx.c                     |   70
> ++++++++++++++++++++++++
>  xen/include/asm-x86/bitops.h                   |   10 ++++
>  xen/include/asm-x86/hvm/hvm.h                  |    2 +
>  xen/include/asm-x86/hvm/vlapic.h               |   20 +++++++-
>  xen/include/asm-x86/hvm/vmx/vmcs.h             |   13 +++++
>  xen/include/asm-x86/hvm/vmx/vmx.h              |   27 +++++++++
>  xen/include/asm-x86/mach-default/irq_vectors.h |    3 +-
>  11 files changed, 175 insertions(+), 32 deletions(-)
> 



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