Il 30/05/2013 19:07, David Daney ha scritto: > On 05/28/2013 09:34 AM, Paolo Bonzini wrote: >> Il 19/05/2013 07:47, Sanjay Lal ha scritto: >>> - Add API to allow clients (QEMU etc.) to check whether the H/W >>> supports the MIPS VZ-ASE. >> >> Why does this matter to userspace? Do the userspace have some way to >> detect if the kernel is unmodified or minimally-modified? >> > > There are (will be) two types of VM presented by MIPS KVM: > > 1) That provided by the initial patch where a faux-MIPS is emulated and > all kernel code must be in the USEG address space. > > 2) Real MIPS, addressing works as per the architecture specification. > > Presumably the user-space client would like to know which of these are > supported, as well as be able to select the desired model. Understood. It's really two different machine types. > I don't know the best way to do this, but I agree that > KVM_CAP_MIPS_VZ_ASE is probably not the best name for it. > > My idea was to have the arg of the KVM_CREATE_VM ioctl specify the > desired style Ok. How complex is it? Do you plan to do this when the patches are "really ready" for Linus' tree? Paolo
