linux-kernel - Re: [PATCHv2] perf/x86/intel/uncore: add support for Haswell ULT IMC uncore

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Date:	Tue, 21 Apr 2015 09:29:07 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Sonny Rao <sonnyrao@...omium.org>
Cc:	linux-kernel@...r.kernel.org,
	Stephane Eranian <eranian@...gle.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org
Subject: Re: [PATCHv2] perf/x86/intel/uncore: add support for Haswell ULT IMC
 uncore


* Sonny Rao <sonnyrao@...omium.org> wrote:

> This uncore is the same as the Haswell desktop part but uses a
> different PCI ID.
> 
> Signed-off-by: Sonny Rao <sonnyrao@...omium.org>
> ---
>  arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c b/arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c
> index 3001015..ca75e70 100644
> --- a/arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c
> +++ b/arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c
> @@ -1,6 +1,9 @@
>  /* Nehalem/SandBridge/Haswell uncore support */
>  #include "perf_event_intel_uncore.h"
>  
> +/* Uncore IMC PCI Id */
> +#define PCI_DEVICE_ID_INTEL_HSW_U_IMC	0x0a04
> +
>  /* SNB event control */
>  #define SNB_UNC_CTL_EV_SEL_MASK			0x000000ff
>  #define SNB_UNC_CTL_UMASK_MASK			0x0000ff00
> @@ -472,6 +475,10 @@ static const struct pci_device_id hsw_uncore_pci_ids[] = {
>  		PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_HSW_IMC),
>  		.driver_data = UNCORE_PCI_DEV_DATA(SNB_PCI_UNCORE_IMC, 0),
>  	},
> +	{ /* IMC */
> +		PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_HSW_U_IMC),
> +		.driver_data = UNCORE_PCI_DEV_DATA(SNB_PCI_UNCORE_IMC, 0),
> +	},
>  	{ /* end: all zeroes */ },
>  };
>  
> @@ -502,6 +509,7 @@ static const struct imc_uncore_pci_dev desktop_imc_pci_ids[] = {
>  	IMC_DEV(IVB_IMC, &ivb_uncore_pci_driver),    /* 3rd Gen Core processor */
>  	IMC_DEV(IVB_E3_IMC, &ivb_uncore_pci_driver), /* Xeon E3-1200 v2/3rd Gen Core processor */
>  	IMC_DEV(HSW_IMC, &hsw_uncore_pci_driver),    /* 4th Gen Core Processor */
> +	IMC_DEV(HSW_U_IMC, &hsw_uncore_pci_driver),  /* 4th Gen Core ULT Mobile Processor */
>  	{  /* end marker */ }
>  };

So now it becomes rather inconsistent:

  - PCI_DEVICE_ID_INTEL_HSW_IMC is defined in include/linux/pci_ids.h
  - PCI_DEVICE_ID_INTEL_HSW_U_IMC is defined in arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c

Could you please also send a patch on top of this one that moves the 
other, related PCI IDs as well?

Thanks,

	Ingo
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