[v4,0/2] KVM: nSVM: ondemand nested state allocation

Message

Maxim Levitsky Sept. 17, 2020, 10:10 a.m. UTC

This is new version of ondemand nested state allocation.

In this version I dropped the changes to set_efer and instead
added a new request KVM_REQ_OUT_OF_MEMORY which makes the kvm
exit to userspace with KVM_EXIT_INTERNAL_ERROR

This request is used in (unlikely) case of memory allocation
failure.

Maxim Levitsky (2):
  KVM: add request KVM_REQ_OUT_OF_MEMORY
  KVM: nSVM: implement ondemand allocation of the nested state

 arch/x86/kvm/svm/nested.c | 42 ++++++++++++++++++++++++++++++
 arch/x86/kvm/svm/svm.c    | 54 ++++++++++++++++++++++-----------------
 arch/x86/kvm/svm/svm.h    |  7 +++++
 arch/x86/kvm/x86.c        |  7 +++++
 include/linux/kvm_host.h  |  1 +
 5 files changed, 87 insertions(+), 24 deletions(-)