On 17 September 2018 at 11:41, Suzuki K Poulose <suzuki.poulose@xxxxxxx> wrote: > Allow specifying the physical address size limit for a new > VM via the kvm_type argument for the KVM_CREATE_VM ioctl. This > allows us to finalise the stage2 page table as early as possible > and hence perform the right checks on the memory slots > without complication. The size is ecnoded as Log2(PA_Size) in > bits[7:0] of the type field. For backward compatibility the > value 0 is reserved and implies 40bits. Also, lift the limit > of the IPA to host limit and allow lower IPA sizes (e.g, 32). > > The userspace could check the extension KVM_CAP_ARM_VM_PHYS_SHIFT > for the availability of this feature. The cap check returns the > maximum limit for the physical address shift supported by the host. > > Cc: Marc Zyngier <marc.zyngier@xxxxxxx> > Cc: Christoffer Dall <cdall@xxxxxxxxxx> > Cc: Peter Maydel <peter.maydell@xxxxxxxxxx> Typo: my surname has two "l"s in it. thanks -- PMM
