KVM: Refactor hypercall infrastructure (v3)

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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>

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This commit is contained in:

Anthony Liguori 2007-09-17 14:57:50 -05:00 • committed by Avi Kivity

parent aca7f96600

commit 7aa81cc047

6 changed files with 199 additions and 183 deletions

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8

drivers/kvm/kvm.h

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156

drivers/kvm/kvm_main.c

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19

drivers/kvm/svm.c

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29

drivers/kvm/vmx.c

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11

drivers/kvm/x86_emulate.c

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155

include/linux/kvm_para.h

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