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

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Message-ID: <37D7C6CF3E00A74B8858931C1DB2F077018F3233@SHSMSX103.ccr.corp.intel.com>
Date:	Wed, 26 Aug 2015 15:12:16 +0000
From:	"Liang, Kan" <kan.liang@...el.com>
To:	'Stephane Eranian' <eranian@...gle.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

> 
> > > +       },
> > > +       { /* 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,
Kan