Re: [PATCH 3/3] KVM: PPC: Book3S: Add support for hwrng found on some powernv systems

Il 02/10/2013 16:08, Alexander Graf ha scritto:

quoted

The hwrng is accessible by host userspace via /dev/mem.

A guest should live on the same permission level as a user space
application. If you run QEMU as UID 1000 without access to /dev/mem, why
should the guest suddenly be able to directly access a memory location
(MMIO) it couldn't access directly through a normal user space interface.

It's basically a layering violation.

With Michael's earlier patch in this series, the hwrng is accessible by
host userspace via /dev/hwrng, no?

Paolo