x86-iommu: turn on IR by default if proper
When the user didn't specify "intremap" for the IOMMU device, we turn it on by default if it is supported. This will turn IR on for the default Q35 platform as long as the IOMMU device is specified on new kernels. Signed-off-by: Peter Xu <peterx@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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@ -112,6 +112,7 @@ static void x86_iommu_realize(DeviceState *dev, Error **errp)
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PCMachineState *pcms =
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PCMachineState *pcms =
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PC_MACHINE(object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE));
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PC_MACHINE(object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE));
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QLIST_INIT(&x86_iommu->iec_notifiers);
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QLIST_INIT(&x86_iommu->iec_notifiers);
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bool irq_all_kernel = kvm_irqchip_in_kernel() && !kvm_irqchip_is_split();
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if (!pcms || !pcms->bus) {
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if (!pcms || !pcms->bus) {
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error_setg(errp, "Machine-type '%s' not supported by IOMMU",
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error_setg(errp, "Machine-type '%s' not supported by IOMMU",
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@ -121,12 +122,12 @@ static void x86_iommu_realize(DeviceState *dev, Error **errp)
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/* If the user didn't specify IR, choose a default value for it */
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/* If the user didn't specify IR, choose a default value for it */
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if (x86_iommu->intr_supported == ON_OFF_AUTO_AUTO) {
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if (x86_iommu->intr_supported == ON_OFF_AUTO_AUTO) {
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x86_iommu->intr_supported = ON_OFF_AUTO_OFF;
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x86_iommu->intr_supported = irq_all_kernel ?
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ON_OFF_AUTO_OFF : ON_OFF_AUTO_ON;
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}
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}
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/* Both Intel and AMD IOMMU IR only support "kernel-irqchip={off|split}" */
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/* Both Intel and AMD IOMMU IR only support "kernel-irqchip={off|split}" */
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if (x86_iommu_ir_supported(x86_iommu) && kvm_irqchip_in_kernel() &&
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if (x86_iommu_ir_supported(x86_iommu) && irq_all_kernel) {
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!kvm_irqchip_is_split()) {
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error_setg(errp, "Interrupt Remapping cannot work with "
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error_setg(errp, "Interrupt Remapping cannot work with "
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"kernel-irqchip=on, please use 'split|off'.");
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"kernel-irqchip=on, please use 'split|off'.");
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return;
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return;
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