[cc +alexey] On Mon, 2015-05-25 at 00:48 -0700, Peter Crosthwaite wrote: > Hi Alex and all, > > I am working on a patch series to enable multiple CPU architectures to > run at once. It's a long story, but I have hit a snag in hw/vfio/pci.c > which AFAICS is the only in-tree system-mode use of HOST_PAGE_ALIGN > (all usermode code is a non-issue as not looking to support user-mode > multi-arch yet). > > The problem I face, is that this macro depends on translate-all.c's > qemu_host_page_size which in turn, depends on TARGET_PAGE_SIZE. I'm > hoping that one day, TARGET_PAGE_SIZE will be a variable and the users > of it will know to get the correct value depending on their CPU > specific code location. vfio is the only one I can't handle. My > knowledge on vfio is near-0, but my thinking is, since this is not > arch specific code can we instead use the raw host page alignment > rather that the CPU arch specific one?
I think we could replace our use of HOST_PAGE_ALIGN with something based only on the host's getpagesize(). I don't see that we really care about the target page size for this usage. Alexey, I think you're the only arch where host and target page sizes can actually be different, do you agree? Thanks, Alex
