On Wed, 2020-04-22 at 23:16 -0700, Christoph Hellwig wrote: > On Wed, Apr 22, 2020 at 01:14:44PM -0400, Jon Derrick wrote: > > The two patches (Linux & QEMU) add support for passthrough VMD devices > > in QEMU/KVM. VMD device 28C0 already supports passthrough natively by > > providing the Host Physical Address in a shadow register to the guest > > for correct bridge programming. > > > > The QEMU patch emulates the 28C0 mode by creating a shadow register and > > advertising its support by using QEMU's subsystem vendor/id. > > The Linux patch matches the QEMU subsystem vendor/id to use the shadow > > register. > > Please pick a different PCI ID for Qemu vs real hardware so that we > can properly quirk them if they end up behaving differently due to > hardware or software bugs. Sure. Will look into that. Thanks Christoph Jon
