perf/x86/intel/uncore: Add Broadwell-U uncore IMC PMU support

This patch enables the uncore Memory Controller (IMC) PMU
support for Intel Broadwell-U (Model 61) mobile processors.
The IMC PMU enables measuring memory bandwidth.

To use with perf:
$ perf stat -a -I 1000 -e
uncore_imc/data_reads/,uncore_imc/data_writes/ sleep 10

Tested-by: Sonny Rao <sonnyrao@chromium.org>
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kan.liang@intel.com
Cc: peterz@infradead.org
Link: http://lkml.kernel.org/r/20150423065642.GA4890@thinkpad
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index c635b8b..a03f964 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -922,6 +922,9 @@ static int __init uncore_pci_init(void)
        case 69: /* Haswell Celeron */
                ret = hsw_uncore_pci_init();
                break;
+       case 61: /* Broadwell */
+               ret = bdw_uncore_pci_init();
+               break;
        default:
                return 0;
        }

diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.h b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
index 6c8c1e7..06b0793 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.h
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
@@ -326,6 +326,7 @@ extern struct event_constraint uncore_constraint_empty;
 int snb_uncore_pci_init(void);
 int ivb_uncore_pci_init(void);
 int hsw_uncore_pci_init(void);
+int bdw_uncore_pci_init(void);
 void snb_uncore_cpu_init(void);
 void nhm_uncore_cpu_init(void);
 

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 4562e9e..b005a78 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c
@@ -7,6 +7,7 @@
 #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
+#define PCI_DEVICE_ID_INTEL_BDW_IMC    0x1604
 
 /* SNB event control */
 #define SNB_UNC_CTL_EV_SEL_MASK                        0x000000ff
@@ -486,6 +487,14 @@ static const struct pci_device_id hsw_uncore_pci_ids[] = {
        { /* end: all zeroes */ },
 };
 
+static const struct pci_device_id bdw_uncore_pci_ids[] = {
+       { /* IMC */
+               PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BDW_IMC),
+               .driver_data = UNCORE_PCI_DEV_DATA(SNB_PCI_UNCORE_IMC, 0),
+       },
+       { /* end: all zeroes */ },
+};
+
 static struct pci_driver snb_uncore_pci_driver = {
        .name           = "snb_uncore",
        .id_table       = snb_uncore_pci_ids,
@@ -501,6 +510,11 @@ static struct pci_driver hsw_uncore_pci_driver = {
        .id_table       = hsw_uncore_pci_ids,
 };
 
+static struct pci_driver bdw_uncore_pci_driver = {
+       .name           = "bdw_uncore",
+       .id_table       = bdw_uncore_pci_ids,
+};
+
 struct imc_uncore_pci_dev {
        __u32 pci_id;
        struct pci_driver *driver;
@@ -514,6 +528,7 @@ static const struct imc_uncore_pci_dev desktop_imc_pci_ids[] = {
        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 */
+       IMC_DEV(BDW_IMC, &bdw_uncore_pci_driver),    /* 5th Gen Core U */
        {  /* end marker */ }
 };
 
@@ -561,6 +576,11 @@ int hsw_uncore_pci_init(void)
        return imc_uncore_pci_init();
 }
 
+int bdw_uncore_pci_init(void)
+{
+       return imc_uncore_pci_init();
+}
+
 /* end of Sandy Bridge uncore support */
 
 /* Nehalem uncore support */