From: Scott Wood <scottwood@freescale.com>
To: Timur Tabi <timur@freescale.com>
Cc: Matthew McClintock <msm@freescale.com>,
kumar.gala@freescale.com, linuxppc-dev@ozlabs.org
Subject: Re: [PATCH] powerpc/85xx: disable timebase synchronization under the hypervisor
Date: Tue, 14 Jun 2011 18:14:06 -0500 [thread overview]
Message-ID: <20110614181406.294cdf5f@schlenkerla.am.freescale.net> (raw)
In-Reply-To: <1308092673-13045-1-git-send-email-timur@freescale.com>
On Tue, 14 Jun 2011 18:04:33 -0500
Timur Tabi <timur@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@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.
-Scott
next prev parent reply other threads:[~2011-06-14 23:14 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-14 23:04 [PATCH] powerpc/85xx: disable timebase synchronization under the hypervisor Timur Tabi
2011-06-14 23:14 ` Scott Wood [this message]
2011-06-14 23:15 ` Timur Tabi
2011-06-14 23:25 ` Scott Wood
2011-06-15 1:58 ` Benjamin Herrenschmidt
2011-06-15 2:10 ` Tabi Timur-B04825
2011-06-15 2:33 ` Benjamin Herrenschmidt
2011-06-22 11:44 ` Kumar Gala
2011-06-22 14:55 ` Timur Tabi
2011-06-23 17:22 ` Scott Wood
2011-06-23 17:33 ` Timur Tabi
2011-06-23 17:48 ` Scott Wood
2011-06-24 2:36 ` Segher Boessenkool
2011-06-24 2:38 ` Tabi Timur-B04825
2011-06-24 3:50 ` Segher Boessenkool
2011-06-24 15:16 ` Scott Wood
2011-06-24 23:36 ` Benjamin Herrenschmidt
2011-06-27 13:35 ` Kumar Gala
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