Re: [patch 1/6] x86, perf, cqm: Document PQR MSR abuse

Matt Fleming
2015-05-19T11:54:00Z

On Tue, 19 May, at 12:00:50AM, Thomas Gleixner wrote:
> The cqm code acts like it owns the PQR MSR completely. That's not true
> because only the lower 10 bits are used for CQM. The upper 32bits are
> used for CLass Of Service ID (closid). Document the abuse. Will be
> fixed in a later patch.
>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> ---
> arch/x86/kernel/cpu/perf_event_intel_cqm.c | 15 +++++++++++++--
> 1 file changed, 13 insertions(+), 2 deletions(-)

Acked-by: Matt Fleming <matt.fleming@intel.com>

--
Matt Fleming, Intel Open Source Technology Center