On 2016/5/23 22:23, Paolo Bonzini wrote:
On 20/05/2016 09:50, Yang Zhang wrote:
VT-d posted interrupt is relying on the CPU side's posted interrupt.
Need to check whether VCPU's APICv is active before enabing VT-d posted
interrupt.
Signed-off-by: Yang Zhang <yang.zhang.wz@xxxxxxxxx>
Signed-off-by: Shengge Ding <shengge.dsg@xxxxxxxxxxxxxxx>
Please resend this patch without format=flowed (just use
git-send-email), as it cannot be applied otherwise.
Sorry, my git proxy is broken recently. I will resend it ASAP once the
problem got fixed.
Thanks,
Paolo
---
arch/x86/kvm/vmx.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 7ebf27b..8ba87f3 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2072,7 +2072,8 @@ static void vmx_vcpu_pi_load(struct kvm_vcpu
*vcpu, int cpu)
unsigned int dest;
if (!kvm_arch_has_assigned_device(vcpu->kvm) ||
- !irq_remapping_cap(IRQ_POSTING_CAP))
+ !irq_remapping_cap(IRQ_POSTING_CAP) ||
+ !kvm_vcpu_apicv_active(vcpu))
return;
do {
@@ -2180,7 +2181,8 @@ 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))
+ !irq_remapping_cap(IRQ_POSTING_CAP) ||
+ !kvm_vcpu_apicv_active(vcpu))
return;
/* Set SN when the vCPU is preempted */
@@ -10698,7 +10700,8 @@ static int vmx_pre_block(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))
+ !irq_remapping_cap(IRQ_POSTING_CAP) ||
+ !kvm_vcpu_apicv_active(vcpu))
return 0;
vcpu->pre_pcpu = vcpu->cpu;
@@ -10764,7 +10767,8 @@ static void vmx_post_block(struct kvm_vcpu *vcpu)
unsigned long flags;
if (!kvm_arch_has_assigned_device(vcpu->kvm) ||
- !irq_remapping_cap(IRQ_POSTING_CAP))
+ !irq_remapping_cap(IRQ_POSTING_CAP) ||
+ !kvm_vcpu_apicv_active(vcpu))
return;
do {
@@ -10817,7 +10821,8 @@ static int vmx_update_pi_irte(struct kvm *kvm,
unsigned int host_irq,
int idx, ret = -EINVAL;
if (!kvm_arch_has_assigned_device(kvm) ||
- !irq_remapping_cap(IRQ_POSTING_CAP))
+ !irq_remapping_cap(IRQ_POSTING_CAP) ||
+ !kvm_vcpu_apicv_active(kvm->vcpus[0]))
return 0;
idx = srcu_read_lock(&kvm->irq_srcu);
--
best regards
yang
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