Commit 1121e0af authored by Peter Xu's avatar Peter Xu Committed by Michael S. Tsirkin
Browse files

x86-iommu: introduce "intremap" property 



Adding one property for intel-iommu devices to specify whether we should
support interrupt remapping. By default, IR is disabled. To enable it,
we should use (take Intel IOMMU as example):

  -device intel_iommu,intremap=on

This property can be shared by Intel and future AMD IOMMUs.

Signed-off-by: default avatarPeter Xu <peterx@redhat.com>
Reviewed-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 1cf5fd57

hw/i386/x86-iommu.c

+23 −0
Original line number Diff line number Diff line
@@ -59,9 +59,32 @@ static void x86_iommu_class_init(ObjectClass *klass, void *data) 
    dc->realize = x86_iommu_realize;

}



static bool x86_iommu_intremap_prop_get(Object *o, Error **errp)

{

    X86IOMMUState *s = X86_IOMMU_DEVICE(o);

    return s->intr_supported;

}



static void x86_iommu_intremap_prop_set(Object *o, bool value, Error **errp)

{

    X86IOMMUState *s = X86_IOMMU_DEVICE(o);

    s->intr_supported = value;

}



static void x86_iommu_instance_init(Object *o)

{

    X86IOMMUState *s = X86_IOMMU_DEVICE(o);



    /* By default, do not support IR */

    s->intr_supported = false;

    object_property_add_bool(o, "intremap", x86_iommu_intremap_prop_get,

                             x86_iommu_intremap_prop_set, NULL);

}



static const TypeInfo x86_iommu_info = {

    .name          = TYPE_X86_IOMMU_DEVICE,

    .parent        = TYPE_SYS_BUS_DEVICE,

    .instance_init = x86_iommu_instance_init,

    .instance_size = sizeof(X86IOMMUState),

    .class_init    = x86_iommu_class_init,

    .class_size    = sizeof(X86IOMMUClass),

include/hw/i386/x86-iommu.h

+1 −0
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ struct X86IOMMUClass { 


struct X86IOMMUState {

    SysBusDevice busdev;

    bool intr_supported;        /* Whether vIOMMU supports IR */

};



/**