tree 6ac8854faf3db2bc499e2c105fdfdab95df52170
parent aca7f96600b170e470b3056aba0ed8d7df8d330d
author Anthony Liguori <aliguori@us.ibm.com> 1190059070 -0500
committer Avi Kivity <avi@qumranet.com> 1201708366 +0200

KVM: Refactor hypercall infrastructure (v3)

This patch refactors the current hypercall infrastructure to better
support live migration and SMP.  It eliminates the hypercall page by
trapping the UD exception that would occur if you used the wrong hypercall
instruction for the underlying architecture and replacing it with the right
one lazily.

A fall-out of this patch is that the unhandled hypercalls no longer trap to
userspace.  There is very little reason though to use a hypercall to
communicate with userspace as PIO or MMIO can be used.  There is no code
in tree that uses userspace hypercalls.

[avi: fix #ud injection on vmx]

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>