Here is change log from V3 To V4: - Fixing spelling/grammar mistakes suggested by Randy Dunlap - Changing the hypercall interface to be able to process multiple pages per one hypercall also suggested by Randy Dunlap. It turns out that this will save lots of vmexist/memory slot flushes when protecting many pages. [PATCH RFC V4 1/3] KVM: X86: Memory ROE documentation [PATCH RFC V4 2/3] KVM: X86: Adding arbitrary data pointer in kvm memslot iterator functions [PATCH RFC V4 3/3] KVM: X86: Adding skeleton for Memory ROE Summary: Documentation/virtual/kvm/hypercalls.txt | 14 ++++ arch/x86/include/asm/kvm_host.h | 11 ++- arch/x86/kvm/Kconfig | 7 ++ arch/x86/kvm/mmu.c | 127 ++++++++++++++++++++++--------- arch/x86/kvm/x86.c | 104 ++++++++++++++++++++++++- include/linux/kvm_host.h | 3 + include/uapi/linux/kvm_para.h | 1 + virt/kvm/kvm_main.c | 29 ++++++- 8 files changed, 254 insertions(+), 42 deletions(-)