On Wed, 13 May 2015, Jiang Liu wrote: > On 2015/4/30 15:06, Feng Wu wrote: > > With Posted-Interrupts support in Intel CPU and IOMMU, an external > > interrupt from assigned-devices could be directly delivered to a > > virtual CPU in a virtual machine. Instead of hacking KVM and Intel > > IOMMU drivers, we propose a platform independent interface to target > > an interrupt to a specific virtual CPU in a virtual machine, or set > > virtual CPU affinity for an interrupt. > > > > By adopting this new interface and the hierarchy irqdomain, we could > > easily support posted-interrupts on Intel platforms, and also provide > > flexible enough interfaces for other platforms to support similar > > features. > > > > Here is the usage scenario for this interface: > > Guest update MSI/MSI-X interrupt configuration > > -->QEMU and KVM handle this > > -->KVM call this interface (passing posted interrupts descriptor > > and guest vector) > > -->irq core will transfer the control to IOMMU > > -->IOMMU will do the real work of updating IRTE (IRTE has new > > format for VT-d Posted-Interrupts) > > Hi Thomas, > Any comments or suggestions about this abstraction interface?
It's on my review list... -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
