linux-kernel - Re: [PATCH] intel_pstate: Fix MSR_CONFIG_TDP_x addressing in core_get_max

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Date:	Sat, 09 Jul 2016 20:45:39 -0700
From:	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Jan Kiszka <jan.kiszka@...mens.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Linux PM list <linux-pm@...r.kernel.org>
Subject: Re: [PATCH] intel_pstate: Fix MSR_CONFIG_TDP_x addressing in
 core_get_max_pstate

On Sat, 2016-07-09 at 02:45 +0200, Rafael J. Wysocki wrote:
> On Friday, July 08, 2016 12:39:07 PM Srinivas Pandruvada wrote:
> > On Fri, 2016-07-08 at 20:42 +0200, Jan Kiszka wrote:
> > > If MSR_CONFIG_TDP_CONTROL is locked, we currently try to address
> > > some
> > > MSR 0x80000648 or so. Mask out the relevant level bits 0 and 1.
> > > 
> > > Found while running over the Jailhouse hypervisor which became
> > > upset
> > > about this strange MSR index.
> > > 
> > > Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
> > Acked-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
> 
> OK
> 
> Should this go into stable?
Better to mark for stable tree 4.4+

Thanks,
Srinivas