On 17 December 2013 18:20, Stefano Stabellini <stefano.stabell...@eu.citrix.com> wrote: > On Tue, 17 Dec 2013, Peter Maydell wrote: >> Per-host-architecture ifdef ladders are kind of nasty. What's this >> code actually trying to do ? (looks like maybe "64 bit host addresses >> vs 32 bit host addresses" ?) > > Almost. > It is trying to decide how much stuff we can map into QEMU's address > space (that is what the "Cap" is referring to). In particular consider > the case where we are running on an ARMv8 system, dom0 and QEMU are > 32-bit and the guest is 64-bit.
Right, so you essentially want to know the size of a host address (that's 32 bits in a 32 bit QEMU even if the h/w is ARMv8). #if HOST_LONG_BITS == 32 [stuff for 32 bit address space] #else [stuff for 64 bit address space] #endif thanks -- PMM
