From 1121e0afdcfa0cd40e36bd3acff56a3fac4f70fd Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Thu, 14 Jul 2016 13:56:13 +0800 Subject: [PATCH] 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: Peter Xu Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/i386/x86-iommu.c | 23 +++++++++++++++++++++++ include/hw/i386/x86-iommu.h | 1 + 2 files changed, 24 insertions(+) diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c index f395139b97..4280839860 100644 --- a/hw/i386/x86-iommu.c +++ b/hw/i386/x86-iommu.c @@ -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), diff --git a/include/hw/i386/x86-iommu.h b/include/hw/i386/x86-iommu.h index b2401a6380..699dd0615c 100644 --- a/include/hw/i386/x86-iommu.h +++ b/include/hw/i386/x86-iommu.h @@ -43,6 +43,7 @@ struct X86IOMMUClass { struct X86IOMMUState { SysBusDevice busdev; + bool intr_supported; /* Whether vIOMMU supports IR */ }; /** -- 2.11.0