Hi! This patch series does some refactoring and implements on demand nested state area This way at least guests that don't use nesting won't waste memory on nested state. Patches 1,2,3 are refactoring Patches 4,5 are new from V1 and implement more strict SMM save state area checking on resume from SMM to avoid guest tampering with this area. This was done to avoid crashing if the guest enabled 'guest was interrupted' flag there and we don't have nested state allocated. Patches 6,7 are for ondemand nested state. The series was tested with various nested guests, in one case even with L3 running, but note that due to unrelated issue, migration with nested guest running didn't work for me with or without this series. I am investigating this currently. Best regards, Maxim Levitsky Maxim Levitsky (7): KVM: SVM: rename a variable in the svm_create_vcpu KVM: nSVM: rename nested 'vmcb' to vmcb12_gpa in few places KVM: SVM: refactor msr permission bitmap allocation KVM: x86: allow kvm_x86_ops.set_efer to return a value KVM: nSVM: more strict smm checks KVM: emulator: more strict rsm checks. KVM: nSVM: implement ondemand allocation of the nested state arch/x86/include/asm/kvm_host.h | 2 +- arch/x86/kvm/emulate.c | 22 ++++-- arch/x86/kvm/svm/nested.c | 53 +++++++++++-- arch/x86/kvm/svm/svm.c | 130 ++++++++++++++++++-------------- arch/x86/kvm/svm/svm.h | 10 ++- arch/x86/kvm/vmx/vmx.c | 5 +- arch/x86/kvm/x86.c | 3 +- 7 files changed, 151 insertions(+), 74 deletions(-) -- 2.26.2
