Re: [PATCH v8 03/13] KVM: Define a new interface kvm_intr_is_single_vcpu()

From	Radim Krčmář <rkrcmar@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v8 03/13] KVM: Define a new interface kvm_intr_is_single_vcpu()
Date	2015-09-18 18:20 +0200
Message-ID	<qa6yd-7HP-15@gated-at.bofh.it> (permalink)
References	(5 earlier) <q9HzQ-50m-5@gated-at.bofh.it> <q9Imf-6cb-45@gated-at.bofh.it> <q9JLk-8c4-17@gated-at.bofh.it> <q9JV0-bo-21@gated-at.bofh.it> <q9QD7-1CN-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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2015-09-17 23:18+0000, Wu, Feng:
>> From: Paolo Bonzini [mailto:pbonzini@redhat.com]
>> On 17/09/2015 17:58, Radim Krčmář wrote:
>>> xAPIC address are only 8 bit long so they always get delivered to x2APIC
>>> cluster 0, where first 16 bits work like xAPIC flat logical mode.
>> 
>> Ok, I was wondering whether this was the correct interpretation.  Thanks!
> 
> Paolo, I don't think Radim clarify your concern, right? Since mda is 8-bit, it
> is wrong with mda >> 16, this is your concern, right?

In case it was:  mda is u32 so the bitshift is defined by C.
(xAPIC destinations in KVM's x2APIC mode are stored in lowest 8 bits of
 mda, hence the cluster is always 0.)

Or am I still missing the point?
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Thread

[PATCH v8 00/13] Add VT-d Posted-Interrupts support Feng Wu <feng.wu@intel.com> - 2015-09-16 11:10 +0200
  [PATCH v8 10/13] KVM: Update Posted-Interrupts Descriptor when vCPU is preempted Feng Wu <feng.wu@intel.com> - 2015-09-16 11:10 +0200
    Re: [PATCH v8 10/13] KVM: Update Posted-Interrupts Descriptor when  vCPU is preempted Paolo Bonzini <pbonzini@redhat.com> - 2015-09-16 11:30 +0200
  [PATCH v8 11/13] KVM: Update Posted-Interrupts Descriptor when vCPU is blocked Feng Wu <feng.wu@intel.com> - 2015-09-16 11:10 +0200
    Re: [PATCH v8 11/13] KVM: Update Posted-Interrupts Descriptor when  vCPU is blocked Paolo Bonzini <pbonzini@redhat.com> - 2015-09-16 11:40 +0200
  [PATCH v8 13/13] iommu/vt-d: Add a command line parameter for VT-d posted-interrupts Feng Wu <feng.wu@intel.com> - 2015-09-16 11:10 +0200
  [PATCH v8 02/13] KVM: Add some helper functions for Posted-Interrupts Feng Wu <feng.wu@intel.com> - 2015-09-16 11:10 +0200
  [PATCH v8 04/13] KVM: Make struct kvm_irq_routing_table accessible Feng Wu <feng.wu@intel.com> - 2015-09-16 11:10 +0200
  [PATCH v8 12/13] KVM: Warn if 'SN' is set during posting interrupts by software Feng Wu <feng.wu@intel.com> - 2015-09-16 11:10 +0200
    Re: [PATCH v8 12/13] KVM: Warn if 'SN' is set during posting  interrupts by software Paolo Bonzini <pbonzini@redhat.com> - 2015-09-16 11:40 +0200
  [PATCH v8 06/13] vfio: Register/unregister irq_bypass_producer Feng Wu <feng.wu@intel.com> - 2015-09-16 11:10 +0200
  [PATCH v8 09/13] KVM: Add an arch specific hooks in 'struct kvm_kernel_irqfd' Feng Wu <feng.wu@intel.com> - 2015-09-16 11:10 +0200
    Re: [PATCH v8 09/13] KVM: Add an arch specific hooks in 'struct  kvm_kernel_irqfd' Paolo Bonzini <pbonzini@redhat.com> - 2015-09-16 11:30 +0200
      RE: [PATCH v8 09/13] KVM: Add an arch specific hooks in 'struct  kvm_kernel_irqfd' "Wu, Feng" <feng.wu@intel.com> - 2015-09-17 04:00 +0200
        Re: [PATCH v8 09/13] KVM: Add an arch specific hooks in 'struct  kvm_kernel_irqfd' Paolo Bonzini <pbonzini@redhat.com> - 2015-09-17 11:40 +0200
  [PATCH v8 07/13] KVM: x86: Update IRTE for posted-interrupts Feng Wu <feng.wu@intel.com> - 2015-09-16 11:10 +0200
  [PATCH v8 01/13] KVM: Extend struct pi_desc for VT-d Posted-Interrupts Feng Wu <feng.wu@intel.com> - 2015-09-16 11:20 +0200
  [PATCH v8 05/13] KVM: make kvm_set_msi_irq() public Feng Wu <feng.wu@intel.com> - 2015-09-16 11:20 +0200
  [PATCH v8 03/13] KVM: Define a new interface kvm_intr_is_single_vcpu() Feng Wu <feng.wu@intel.com> - 2015-09-16 11:20 +0200
    Re: [PATCH v8 03/13] KVM: Define a new interface  kvm_intr_is_single_vcpu() Paolo Bonzini <pbonzini@redhat.com> - 2015-09-16 11:30 +0200
      RE: [PATCH v8 03/13] KVM: Define a new interface  kvm_intr_is_single_vcpu() "Wu, Feng" <feng.wu@intel.com> - 2015-09-17 05:20 +0200
        Re: [PATCH v8 03/13] KVM: Define a new interface  kvm_intr_is_single_vcpu() Paolo Bonzini <pbonzini@redhat.com> - 2015-09-17 11:50 +0200
          RE: [PATCH v8 03/13] KVM: Define a new interface  kvm_intr_is_single_vcpu() "Wu, Feng" <feng.wu@intel.com> - 2015-09-17 15:40 +0200
            Re: [PATCH v8 03/13] KVM: Define a new interface  kvm_intr_is_single_vcpu() Paolo Bonzini <pbonzini@redhat.com> - 2015-09-17 16:30 +0200
              Re: [PATCH v8 03/13] KVM: Define a new interface  kvm_intr_is_single_vcpu() Radim Krčmář <rkrcmar@redhat.com> - 2015-09-17 18:00 +0200
                Re: [PATCH v8 03/13] KVM: Define a new interface  kvm_intr_is_single_vcpu() Paolo Bonzini <pbonzini@redhat.com> - 2015-09-17 18:10 +0200
                RE: [PATCH v8 03/13] KVM: Define a new interface  kvm_intr_is_single_vcpu() "Wu, Feng" <feng.wu@intel.com> - 2015-09-18 01:20 +0200
                Re: [PATCH v8 03/13] KVM: Define a new interface  kvm_intr_is_single_vcpu() Paolo Bonzini <pbonzini@redhat.com> - 2015-09-18 18:20 +0200
                Re: [PATCH v8 03/13] KVM: Define a new interface  kvm_intr_is_single_vcpu() Radim Krčmář <rkrcmar@redhat.com> - 2015-09-18 18:20 +0200
              RE: [PATCH v8 03/13] KVM: Define a new interface  kvm_intr_is_single_vcpu() "Wu, Feng" <feng.wu@intel.com> - 2015-09-18 01:20 +0200
  Re: [PATCH v8 00/13] Add VT-d Posted-Interrupts support Paolo Bonzini <pbonzini@redhat.com> - 2015-09-16 11:40 +0200

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