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| author | Peter Xu <peterx@redhat.com> | 2016-07-14 13:56:25 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-07-21 20:43:49 +0300 |
| commit | 8b5ed7dffa1fa2835a782a8db8d4f3f1f772ada9 (patch) | |
| tree | 39b35e66fe3b74b20887d41fb9774d7605617f8d /include/hw/i386/x86-iommu.h | |
| parent | c15fa0bea982766c5c3de28d1abd245e3c44a17f (diff) | |
| download | focaccia-qemu-8b5ed7dffa1fa2835a782a8db8d4f3f1f772ada9.tar.gz focaccia-qemu-8b5ed7dffa1fa2835a782a8db8d4f3f1f772ada9.zip | |
intel_iommu: add support for split irqchip
In split irqchip mode, IOAPIC is working in user space, only update kernel irq routes when entry changed. When IR is enabled, we directly update the kernel with translated messages. It works just like a kernel cache for the remapping entries. Since KVM irqfd is using kernel gsi routes to deliver interrupts, as long as we can support split irqchip, we will support irqfd as well. Also, since kernel gsi routes will cache translated interrupts, irqfd delivery will not suffer from any performance impact due to IR. And, since we supported irqfd, vhost devices will be able to work seamlessly with IR now. Logically this should contain both vhost-net and vhost-user case. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> [move trace-events lines into target-i386/trace-events] Signed-off-by: Peter Xu <peterx@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/hw/i386/x86-iommu.h')
| -rw-r--r-- | include/hw/i386/x86-iommu.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/hw/i386/x86-iommu.h b/include/hw/i386/x86-iommu.h index 699dd0615c..fa6ce31b74 100644 --- a/include/hw/i386/x86-iommu.h +++ b/include/hw/i386/x86-iommu.h @@ -21,6 +21,7 @@ #define IOMMU_COMMON_H #include "hw/sysbus.h" +#include "hw/pci/pci.h" #define TYPE_X86_IOMMU_DEVICE ("x86-iommu") #define X86_IOMMU_DEVICE(obj) \ @@ -31,6 +32,7 @@ OBJECT_GET_CLASS(X86IOMMUClass, obj, TYPE_X86_IOMMU_DEVICE) #define X86_IOMMU_PCI_DEVFN_MAX 256 +#define X86_IOMMU_SID_INVALID (0xffff) typedef struct X86IOMMUState X86IOMMUState; typedef struct X86IOMMUClass X86IOMMUClass; @@ -39,6 +41,9 @@ struct X86IOMMUClass { SysBusDeviceClass parent; /* Intel/AMD specific realize() hook */ DeviceRealize realize; + /* MSI-based interrupt remapping */ + int (*int_remap)(X86IOMMUState *iommu, MSIMessage *src, + MSIMessage *dst, uint16_t sid); }; struct X86IOMMUState { |