linux-kernel - Re: [PATCH 1/1] perf/x86/intel/uncore: Add Broadwell-DE uncore support

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Date:	Wed, 26 Aug 2015 08:13:45 -0700
From:	Stephane Eranian <eranian@...gle.com>
To:	"Liang, Kan" <kan.liang@...el.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] perf/x86/intel/uncore: Add Broadwell-DE uncore support

On Wed, Aug 26, 2015 at 8:12 AM, Liang, Kan <kan.liang@...el.com> wrote:
>>
>> > > +       },
>> > > +       { /* MC0 Channel 0 */
>> > > +               PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x6fb0),
>> > > +               .driver_data =
>> > UNCORE_PCI_DEV_DATA(BDX_PCI_UNCORE_IMC, 0),
>> > > +       },
>> > > +       { /* MC0 Channel 1 */
>> > > +               PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x6fb1),
>> > > +               .driver_data =
>> > UNCORE_PCI_DEV_DATA(BDX_PCI_UNCORE_IMC, 1),
>> > > +       },
>> >
>> > Are you sure about the two PCI id for the IMCs (0x6fb0, 0x6fb1) ?
>> > I do not see them on my system?
>>
>> Yes, the PCI id is correct. You cannot see them is because they are hide by
>> BIOS. I've already sent a request to BIOS team to unhide them. I will let you
>> know the updated BIOS version, once I get feedback from them.
>> BTW, I've verified the PCI id in BDX-EP with corrected BIOS. IMCs counter
>> works well. EP and DE are same for iMC0CH0 and iMC0CH1.
>>
>
> Hi Stephane,
>
> The issue has been fixed since BIOS 76V12 for BDX-DE.
> You may update the BIOS to unhide IMC counter.
>
Thanks for following up. The problem has been fixed now.
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