On Monday 07 August 2006 06:45, Rusty Russell wrote: > Unfortunately, due to include cycles, we can't put these in > paravirt.h: we use a separate header for these. > > The implementation comes from Zach's [RFC, PATCH 10/24] i386 Vmi descriptor changes: > > Descriptor and trap table cleanups. Add cleanly written accessors for > IDT and GDT gates so the subarch may override them. Note that this > allows the hypervisor to transparently tweak the DPL of the descriptors > as well as the RPL of segments in those descriptors, with no unnecessary > kernel code modification. It also allows the hypervisor implementation > of the VMI to tweak the gates, allowing for custom exception frames or > extra layers of indirection above the guest fault / IRQ handlers. Nice cleanup. The old assembly mess was ripe to be killed for a long time. -Andi
