[PATCH] powerpc/85xx: disable timebase synchronization under the hypervisor

Scott Wood scottwood at freescale.com
Wed Jun 15 09:14:06 EST 2011

On Tue, 14 Jun 2011 18:04:33 -0500
Timur Tabi <timur at freescale.com> wrote:

> The Freescale hypervisor does not allow guests to write to the timebase
> registers (virtualizing the timebase register was deemed too complicated),
> so don't try to synchronize the timebase registers when we're running
> under the hypervisor.
> This typically happens when kexec support is enabled.
> Signed-off-by: Timur Tabi <timur at freescale.com>

FWIW, it's not supported under KVM either -- though we don't support an SMP
guest under KVM yet, and KVM silently ignores it rather than logs errors as
the FSL HV does.


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