From: Thomas Gleixner <tglx@linutronix.de>
To: "Liang, Kan" <kan.liang@intel.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>, Borislav Petkov <bp@alien8.de>,
Stephane Eranian <eranian@google.com>,
"Chegondi, Harish" <harish.chegondi@intel.com>,
"Kleen, Andi" <andi.kleen@intel.com>
Subject: RE: [patch 04/11] x86/perf/intel_uncore: Cleanup hardware on exit
Date: Wed, 17 Feb 2016 23:00:04 +0100 (CET) [thread overview]
Message-ID: <alpine.DEB.2.11.1602172257320.19512@nanos> (raw)
In-Reply-To: <37D7C6CF3E00A74B8858931C1DB2F0770588B1D0@shsmsx102.ccr.corp.intel.com>
On Wed, 17 Feb 2016, Liang, Kan wrote:
> > If there is a single instance of exit_box() in that patch which flips the wrong
> > bits, then please point it out with the proper reference in the manual and
> > not with such half baken statements as above.
> >
> Sorry, I didn't make it clear.
> For the older server platforms like nhmex and client platforms like snb, I agree
> with you on nhmex_uncore_msr_exit_box and snb_uncore_imc_exit_box.
>
> However, for newer server platforms (start from IVB server), we cannot write 0
> to rsv bit of BOX control registers. The behavior is undefined.
> The following codes may have issues.
> It looks we also write 0 to rsv bit in box_init. We may need to fix it.
Each platform can have its own init/exit callbacks or just omit them when not
needed. But we certainly want them for platforms where it is either needed
(i.e. undo ioremap) or makes sense from the hardware POV.
Thanks,
tglx
next prev parent reply other threads:[~2016-02-17 22:01 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-17 13:47 [patch 00/11] x86/perf/intel_uncore: Cleanup and enhancements Thomas Gleixner
2016-02-17 13:47 ` [patch 01/11] x86/perf/intel_uncore: Remove pointless mask check Thomas Gleixner
2016-02-17 13:47 ` [patch 02/11] x86/perf/intel_uncore: Simplify error rollback Thomas Gleixner
2016-02-17 13:47 ` [patch 03/11] x86/perf/intel_uncore: Fix error handling Thomas Gleixner
2016-02-17 13:47 ` [patch 04/11] x86/perf/intel_uncore: Cleanup hardware on exit Thomas Gleixner
2016-02-17 15:49 ` Liang, Kan
2016-02-17 18:16 ` Thomas Gleixner
2016-02-17 21:57 ` Liang, Kan
2016-02-17 22:00 ` Thomas Gleixner [this message]
2016-02-17 13:47 ` [patch 05/11] x86/perf/intel_uncore: Make code readable Thomas Gleixner
2016-02-17 13:47 ` [patch 07/11] x86/perf/uncore: Track packages not per cpu data Thomas Gleixner
2016-02-17 21:19 ` Stephane Eranian
2016-02-17 21:24 ` Andi Kleen
2016-02-17 21:56 ` Thomas Gleixner
2016-02-17 22:16 ` Andi Kleen
2016-02-17 22:31 ` Thomas Gleixner
2016-02-18 7:50 ` Ingo Molnar
2016-02-18 8:13 ` Peter Zijlstra
2016-02-18 9:35 ` Stephane Eranian
2016-02-18 9:51 ` Peter Zijlstra
2016-02-18 10:25 ` Thomas Gleixner
2016-02-18 10:22 ` Thomas Gleixner
2016-02-18 10:54 ` Thomas Gleixner
2016-02-19 8:39 ` Thomas Gleixner
2016-02-17 21:25 ` Thomas Gleixner
2016-02-17 13:47 ` [patch 06/11] x86/topology: Provide helper to retrieve number of cpu packages Thomas Gleixner
2016-02-17 13:47 ` [patch 08/11] x86/perf/intel_uncore: Clear all hardware state on exit Thomas Gleixner
2016-02-17 13:47 ` [patch 09/11] x86/perf/intel_uncore: Make PCI and MSR uncore independent Thomas Gleixner
2016-02-17 13:47 ` [patch 10/11] cpumask: Export cpumask_any_but Thomas Gleixner
2016-02-17 13:47 ` [patch 11/11] x86/perf/intel_uncore: Make it modular Thomas Gleixner
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