From dd4d607e40dcd2cb7646b510504880a70939d91b Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Fri, 7 Apr 2017 18:59:15 +0800 Subject: intel_iommu: enable remote IOTLB This patch is based on Aviv Ben-David ()'s patch upstream: "IOMMU: enable intel_iommu map and unmap notifiers" https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg01453.html However I removed/fixed some content, and added my own codes. Instead of translate() every page for iotlb invalidations (which is slower), we walk the pages when needed and notify in a hook function. This patch enables vfio devices for VT-d emulation. And, since we already have vhost DMAR support via device-iotlb, a natural benefit that this patch brings is that vt-d enabled vhost can live even without ATS capability now. Though more tests are needed. Signed-off-by: Aviv Ben-David Reviewed-by: Jason Wang Reviewed-by: David Gibson Reviewed-by: \"Michael S. Tsirkin\" Signed-off-by: Peter Xu Message-Id: <1491562755-23867-10-git-send-email-peterx@redhat.com> Signed-off-by: Eduardo Habkost --- include/hw/i386/intel_iommu.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/hw') diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h index 8f212a1..3e51876 100644 --- a/include/hw/i386/intel_iommu.h +++ b/include/hw/i386/intel_iommu.h @@ -63,6 +63,7 @@ typedef union VTD_IR_TableEntry VTD_IR_TableEntry; typedef union VTD_IR_MSIAddress VTD_IR_MSIAddress; typedef struct VTDIrq VTDIrq; typedef struct VTD_MSIMessage VTD_MSIMessage; +typedef struct IntelIOMMUNotifierNode IntelIOMMUNotifierNode; /* Context-Entry */ struct VTDContextEntry { @@ -249,6 +250,11 @@ struct VTD_MSIMessage { /* When IR is enabled, all MSI/MSI-X data bits should be zero */ #define VTD_IR_MSI_DATA (0) +struct IntelIOMMUNotifierNode { + VTDAddressSpace *vtd_as; + QLIST_ENTRY(IntelIOMMUNotifierNode) next; +}; + /* The iommu (DMAR) device state struct */ struct IntelIOMMUState { X86IOMMUState x86_iommu; @@ -286,6 +292,8 @@ struct IntelIOMMUState { MemoryRegionIOMMUOps iommu_ops; GHashTable *vtd_as_by_busptr; /* VTDBus objects indexed by PCIBus* reference */ VTDBus *vtd_as_by_bus_num[VTD_PCI_BUS_MAX]; /* VTDBus objects indexed by bus number */ + /* list of registered notifiers */ + QLIST_HEAD(, IntelIOMMUNotifierNode) notifiers_list; /* interrupt remapping */ bool intr_enabled; /* Whether guest enabled IR */ -- cgit v1.1