From: Zhenyu Wang Date: Wed, 31 Jul 2024 14:13:53 +0000 (-0700) Subject: perf/x86/intel/uncore: Use D0:F0 as a default device X-Git-Tag: v6.12-rc1~145^2~23 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=aaad0e2aa50723969f96b690f72e2f4aefa433f2;p=thirdparty%2Fkernel%2Flinux.git 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 Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Kan Liang 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 f7402bd4da6ec..3934e1e4e3b16 100644 --- 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; }