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SubjectRe: [PATCH] KVM: VMX: add encapsulation kvm_vcpu_pi_need_handle
Hi Peng,

There are two bugs in current code and Paolo already fixed them, please see:
https://www.spinics.net/lists/kvm/msg150896.html

--
Regards,
Longpeng(Mike)

On 2017/9/21 23:14, Peng Hao wrote:

> use kvm_vcpu_pi_need_handle encapsulation simply coede
>
> Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
> ---
> arch/x86/kvm/vmx.c | 27 ++++++++++++---------------
> 1 file changed, 12 insertions(+), 15 deletions(-)
>
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 4253ade..26b99f4 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -559,6 +559,13 @@ static inline int pi_test_sn(struct pi_desc *pi_desc)
> (unsigned long *)&pi_desc->control);
> }
>
> +static inline bool kvm_vcpu_pi_need_handle(struct kvm_vcpu *vcpu)
> +{
> + return kvm_arch_has_assigned_device(vcpu->kvm) &&
> + irq_remapping_cap(IRQ_POSTING_CAP) &&
> + kvm_vcpu_apicv_active(vcpu);
> +}
> +
> struct vcpu_vmx {
> struct kvm_vcpu vcpu;
> unsigned long host_rsp;
> @@ -2202,9 +2209,7 @@ static void vmx_vcpu_pi_load(struct kvm_vcpu *vcpu, int cpu)
> struct pi_desc old, new;
> unsigned int dest;
>
> - if (!kvm_arch_has_assigned_device(vcpu->kvm) ||
> - !irq_remapping_cap(IRQ_POSTING_CAP) ||
> - !kvm_vcpu_apicv_active(vcpu))
> + if (!kvm_vcpu_pi_need_handle(vcpu))
> return;
>
> do {
> @@ -2323,9 +2328,7 @@ static void vmx_vcpu_pi_put(struct kvm_vcpu *vcpu)
> {
> struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
>
> - if (!kvm_arch_has_assigned_device(vcpu->kvm) ||
> - !irq_remapping_cap(IRQ_POSTING_CAP) ||
> - !kvm_vcpu_apicv_active(vcpu))
> + if (!kvm_vcpu_pi_need_handle(vcpu))
> return;
>
> /* Set SN when the vCPU is preempted */
> @@ -11691,9 +11694,7 @@ static int pi_pre_block(struct kvm_vcpu *vcpu)
> struct pi_desc old, new;
> struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
>
> - if (!kvm_arch_has_assigned_device(vcpu->kvm) ||
> - !irq_remapping_cap(IRQ_POSTING_CAP) ||
> - !kvm_vcpu_apicv_active(vcpu))
> + if (!kvm_vcpu_pi_need_handle(vcpu))
> return 0;
>
> vcpu->pre_pcpu = vcpu->cpu;
> @@ -11769,9 +11770,7 @@ static void pi_post_block(struct kvm_vcpu *vcpu)
> unsigned int dest;
> unsigned long flags;
>
> - if (!kvm_arch_has_assigned_device(vcpu->kvm) ||
> - !irq_remapping_cap(IRQ_POSTING_CAP) ||
> - !kvm_vcpu_apicv_active(vcpu))
> + if (!kvm_vcpu_pi_need_handle(vcpu))
> return;
>
> do {
> @@ -11831,9 +11830,7 @@ static int vmx_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
> struct vcpu_data vcpu_info;
> int idx, ret = -EINVAL;
>
> - if (!kvm_arch_has_assigned_device(kvm) ||
> - !irq_remapping_cap(IRQ_POSTING_CAP) ||
> - !kvm_vcpu_apicv_active(kvm->vcpus[0]))
> + if (!kvm_vcpu_pi_need_handle(kvm->vcpus[0]))
> return 0;
>
> idx = srcu_read_lock(&kvm->irq_srcu);


--
Regards,
Longpeng(Mike)

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