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KVM: VMX: refactor IRQ and NMI window enabling

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do_interrupt_requests and vmx_intr_assist go different way for
achieving the same: enabling the nmi/irq window start notification.
Unify their code over enable_{irq|nmi}_window, get rid of a redundant
call to enable_intr_window instead of direct enable_nmi_window
invocation and unroll enable_intr_window for both in-kernel and user
space irq injection accordingly.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Jan Kiszka 2008-09-26 09:30:50 +02:00 committed by Avi Kivity
parent 33f089ca5a
commit f460ee43e2
1 changed files with 32 additions and 46 deletions
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78
arch/x86/kvm/vmx.c
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@ -2389,30 +2389,42 @@ static void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
kvm_queue_interrupt(vcpu, irq);
}
static void do_interrupt_requests(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
static void enable_irq_window(struct kvm_vcpu *vcpu)
{
u32 cpu_based_vm_exec_control;
vmx_update_window_states(vcpu);
cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
}
if (vcpu->arch.interrupt_window_open &&
vcpu->arch.irq_summary && !vcpu->arch.interrupt.pending)
kvm_do_inject_irq(vcpu);
static void enable_nmi_window(struct kvm_vcpu *vcpu)
{
u32 cpu_based_vm_exec_control;
if (vcpu->arch.interrupt_window_open && vcpu->arch.interrupt.pending)
vmx_inject_irq(vcpu, vcpu->arch.interrupt.nr);
if (!cpu_has_virtual_nmis())
return;
cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING;
vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
}
static void do_interrupt_requests(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
{
vmx_update_window_states(vcpu);
if (vcpu->arch.interrupt_window_open) {
if (vcpu->arch.irq_summary && !vcpu->arch.interrupt.pending)
kvm_do_inject_irq(vcpu);
if (vcpu->arch.interrupt.pending)
vmx_inject_irq(vcpu, vcpu->arch.interrupt.nr);
}
if (!vcpu->arch.interrupt_window_open &&
(vcpu->arch.irq_summary || kvm_run->request_interrupt_window))
/*
* Interrupts blocked. Wait for unblock.
*/
cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
else
cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
enable_irq_window(vcpu);
}
static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
@ -3066,35 +3078,6 @@ static void update_tpr_threshold(struct kvm_vcpu *vcpu)
vmcs_write32(TPR_THRESHOLD, (max_irr > tpr) ? tpr >> 4 : max_irr >> 4);
}
static void enable_irq_window(struct kvm_vcpu *vcpu)
{
u32 cpu_based_vm_exec_control;
cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
}
static void enable_nmi_window(struct kvm_vcpu *vcpu)
{
u32 cpu_based_vm_exec_control;
if (!cpu_has_virtual_nmis())
return;
cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING;
vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
}
static void enable_intr_window(struct kvm_vcpu *vcpu)
{
if (vcpu->arch.nmi_pending)
enable_nmi_window(vcpu);
else if (kvm_cpu_has_interrupt(vcpu))
enable_irq_window(vcpu);
}
static void vmx_complete_interrupts(struct vcpu_vmx *vmx)
{
u32 exit_intr_info;
@ -3165,13 +3148,16 @@ static void vmx_intr_assist(struct kvm_vcpu *vcpu)
vcpu->arch.nmi_pending = false;
vcpu->arch.nmi_injected = true;
} else {
enable_intr_window(vcpu);
enable_nmi_window(vcpu);
return;
}
}
if (vcpu->arch.nmi_injected) {
vmx_inject_nmi(vcpu);
enable_intr_window(vcpu);
if (vcpu->arch.nmi_pending)
enable_nmi_window(vcpu);
else if (kvm_cpu_has_interrupt(vcpu))
enable_irq_window(vcpu);
return;
}
}