Resend patchset due to wrong Qemu devel mail address. Sorry for noise. This patchset proposes a solution for vIOMMU to get hardware IOMMU fault event and info. Motivation is to make vIOMMU inject associated fault event when pIOMMU reports fault event. vIOMMU is in charge of transforming fault info and inject to guest. The feature is also very important to support first level translation(Translation request with PASID) in VM which requires vIOMMU to inject device page request to VM.
VFIO can get notification and read fault info via new VFIO cmds. Add fault event handler in the memory IOMMU ops and Intel IOMMU device model needs to register its fault event callback. VFIO will call the callback via memory wrapper function when get fault notification. This patches is prototype code and just passes build test. IOMMU driver new interface is still in the design stage. This patches is to confirm interface between Qemu and VFIO kernel driver is on the right way. Very appreciate for comments. Lan Tianyu (4): VFIO: Set eventfd for IOMMU fault event via new vfio cmd Memory: Introduce IOMMU fault event callback Intel iommu: Add Intel IOMMU fault event callback VFIO: Read IOMMU fault info from kernel space when get fault event hw/i386/intel_iommu.c | 25 ++++++++++++ hw/vfio/common.c | 88 +++++++++++++++++++++++++++++++++++++++++++ include/exec/memory.h | 19 ++++++++++ include/hw/vfio/vfio-common.h | 3 ++ linux-headers/linux/vfio.h | 35 +++++++++++++++++ memory.c | 8 ++++ 6 files changed, 178 insertions(+) -- 1.8.3.1
