perf/x86/intel/uncore: Use D0:F0 as a default device

Some uncore PMON registers are located in the MMIO space of the Host
Bridge and DRAM Controller device, which is located at D0:F0 for
Tiger Lake and later client generation.

Use D0:F0 as a default device. So it doesn't need to keep adding the
complete Device ID list for each generation anymore.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Link: https://lore.kernel.org/r/20240731141353.759643-5-kan.liang@linux.intel.com

diff --git a/arch/x86/events/intel/uncore_snb.c b/arch/x86/events/intel/uncore_snb.c
index f7402bd4da6ec9d565b440e4b314e2b05124ed4a..3934e1e4e3b166415e88892ed6819816570c9771 100644 (file)
--- a/arch/x86/events/intel/uncore_snb.c
+++ b/arch/x86/events/intel/uncore_snb.c
@@ -1504,6 +1504,10 @@ static struct pci_dev *tgl_uncore_get_mc_dev(void)
                ids++;
        }
 
+       /* Just try to grab 00:00.0 device */
+       if (!mc_dev)
+               mc_dev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0));
+
        return mc_dev;
 }