On 21/02/2018 18:47, KarimAllah Ahmed wrote: > ... since using kvm_vcpu_gpa_to_page() and kmap() will only work for guest > memory that has a "struct page". > > The life-cycle of the mapping also changes to avoid doing map and unmap on > every single exit (which becomes very expesive once we use memremap). Now > the memory is mapped and only unmapped when a new VMCS12 is loaded into the > vCPU (or when the vCPU is freed!). In this particular case SMM is not an issue because it cannot use VMX. Therefore it's safe to ignore non-SMM address spaces. You can then introduce int kvm_map_gfn(struct kvm_vcpu *vcpu gfn_t gfn, struct kvm_host_map *map) calling kvm_gfn_to_memslot + __kvm_map_gfn which could also handle the caching aspect. But please let's look at it later, making the lifecycle change separate from the new API. Paolo > Signed-off-by: KarimAllah Ahmed <karahmed@xxxxxxxxx> > --- > arch/x86/kvm/vmx.c | 19 ++++++++++++------- > 1 file changed, 12 insertions(+), 7 deletions(-)
