Segher Boessenkool wrote: > > v2.06 III-E 9.2.1: > "Writing the Time Base is hypervisor privileged." > > v2.06 III-E 2.1: > "If a hypervisor-privileged register is accessed in the guest supervisor > state (MSR[GS PR] = 0b10), an Embedded Hypervisor Privilege exception > occurs." > > (v2.06 III-E 5.4.1, the big SPR table, also shows the TB regs (for writing, > i.e. 284 and 285) to be hypervisor privileged. Consistency, hurray :-) )
To me, all this means that a guest cannot write to the actual timebase register. I'm not interpreting this to mean that a hypervisor can't virtualize the timebase and allow a guest to read/write a virtual timebase register, so that it thinks it's writing to the real hardware timebase register. -- Timur Tabi Linux kernel developer at Freescale _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
