Il 14/10/2013 15:10, Alexander Graf ha scritto: >> More precisely, it allows the guest drivers to pick the >> endianness they prefer. Mixed-endian virtio works fine on QEMU >> with e.g. a mips guest in emulation mode, because then any given >> QEMU binary will always use the same endianness (e.g. big for >> qemu-system-mips). > > We have the same problem (runtime switchable endianness) on PowerPC. > IBM POWER is gaining Little Endian support in Linux now, so we could > easily end up with an LE guest on a BE host. > > IIRC the way we're going to solve this is to hack up > virtio_is_big_endian() to evaluate the first CPU's endianness mode > (which will always be the same as all other CPU's endianness mode due > to hypercall restrictions). > > You could do the same with ARM if you need to support guest kernels > before the new virtio stuff is there. LE POWER is definitely already > reality upstream. And the virtio standard, when it becomes reality, will be LE-only except for some s390 stuff that I don't claim I understand... Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
