On Fri, Dec 09, 2022 at 05:54:46AM +0000, Tian, Kevin wrote: > > From: Jason Gunthorpe <jgg@xxxxxxxxxx> > > Sent: Friday, December 9, 2022 4:26 AM > > > > In real HW "secure MSI" is implemented in a few different ways: > > > > - x86 uses "interrupt remapping" which is a block that sits between > > the device and APIC, that can "remap" the MSI MemWr using per-RID > > tables. Part of the remapping is discarding, the per-RID tables > > will not contain vectors that have not been enabled for the device. > > > > per-RID tables is true for AMD. > > However for Intel VT-d it's per-IOMMU remapping table. Sorry, what exactly does that mean? Doesn't the HW inspect the RID to determine what to do with the MSI? Jason
