Re: [PATCH v10 0/7] Use eoi to track RTC interrupt delivery status

[Gleb Natapov <gleb@redhat.com>]

On Thu, Apr 11, 2013 at 07:21:34PM +0800, Yang Zhang wrote:
> From: Yang Zhang <yang.z.zhang@Intel.com>
> 
> Current interrupt coalescing logci which only used by RTC has conflict
> with Posted Interrupt.
> 
> This patch introduces a new mechinism to use eoi to track interrupt:
> When delivering an interrupt to vcpu, the pending_eoi set to number of
> vcpu that received the interrupt. And decrease it when each vcpu writing
> eoi. No subsequent RTC interrupt can deliver to vcpu until all vcpus
> write eoi.
> 
Reviewed-by: Gleb Natapov <gleb@redhat.com>

> Changes from v9 to v10
> * Remove irq check and line_status check from rtc_irq_check_coalesced() to
>   kvm_ioapic_set_irq().
> * Rebase on top of KVM.
> 
> Changes from v8 to v9
> * Removing pass vector to __rtc_irq_eoi_tracking_restore_one.
> * Rebase on top of KVM.
> 
> Changes from v7 to v8
> * Revamping restore logic.
> * Add BUG_ON to check pending_eoi.
> * Rebase on top of KVM.
> 
> Yang Zhang (7):
>   KVM: Add vcpu info to ioapic_update_eoi()
>   KVM: Introduce struct rtc_status
>   KVM: Return destination vcpu on interrupt injection
>   KVM: Add reset/restore rtc_status support
>   KVM: Force vmexit with virtual interrupt delivery
>   KVM: Let ioapic know the irq line status
>   KVM: Use eoi to track RTC interrupt delivery status
> 
>  arch/x86/kvm/i8254.c     |    4 +-
>  arch/x86/kvm/lapic.c     |   36 ++++++++++----
>  arch/x86/kvm/lapic.h     |    7 ++-
>  arch/x86/kvm/x86.c       |    6 ++-
>  include/linux/kvm_host.h |   11 +++--
>  virt/kvm/assigned-dev.c  |   13 +++--
>  virt/kvm/eventfd.c       |   15 +++--
>  virt/kvm/ioapic.c        |  126 ++++++++++++++++++++++++++++++++++++++++------
>  virt/kvm/ioapic.h        |   20 ++++++-
>  virt/kvm/irq_comm.c      |   31 +++++++-----
>  virt/kvm/kvm_main.c      |    3 +-
>  11 files changed, 207 insertions(+), 65 deletions(-)
> 
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--
			Gleb.