> -----Original Message----- > From: Thomas Gleixner [mailto:t...@linutronix.de] > Sent: Thursday, May 14, 2015 5:04 AM > To: Jiang Liu > Cc: Wu, Feng; mi...@redhat.com; h...@zytor.com; > linux-kernel@vger.kernel.org > Subject: Re: [v4 1/3] genirq: Introduce irq_set_vcpu_affinity() to target an > interrupt to a VCPU > > > 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...
Thanks a lot, Thomas! Thanks, Feng -- 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/
