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

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Date:	Mon, 20 Apr 2015 13:56:36 -0500
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Sonny Rao <sonnyrao@...omium.org>
Cc:	"linux-kernel@...r.kernel.org" <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" <x86@...nel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: Re: [PATCH] perf/x86/intel/uncore: add support for Haswell ULT IMC uncore

On Mon, Apr 20, 2015 at 1:42 PM, 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 | 5 +++++
>  include/linux/pci_ids.h                           | 1 +
>  2 files changed, 6 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..0bda6fc 100644
> --- a/arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c
> +++ b/arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c
> @@ -472,6 +472,10 @@ 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 +506,7 @@ 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 */ }
>  };
>
> diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
> index 38cff8f..e5ae042 100644
> --- a/include/linux/pci_ids.h
> +++ b/include/linux/pci_ids.h
> @@ -2545,6 +2545,7 @@
>  #define PCI_DEVICE_ID_INTEL_IVB_IMC    0x0154
>  #define PCI_DEVICE_ID_INTEL_IVB_E3_IMC 0x0150
>  #define PCI_DEVICE_ID_INTEL_HSW_IMC    0x0c00
> +#define PCI_DEVICE_ID_INTEL_HSW_U_IMC  0x0a04

Please either use the 0x0a04 constant directly in
perf_event_intel_uncore_snb.c, or explain why the #define should be
here, e.g., maybe it will be used in multiple places.  See the comment
at the top of pci_ids.h.

>  #define PCI_DEVICE_ID_INTEL_PXHD_0     0x0320
>  #define PCI_DEVICE_ID_INTEL_PXHD_1     0x0321
>  #define PCI_DEVICE_ID_INTEL_PXH_0      0x0329
> --
> 2.1.2
>
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