From 1d9f3e20a56d33e55748552aeec597f58542f92d Mon Sep 17 00:00:00 2001 From: Tony Luck Date: Fri, 8 Jun 2018 09:07:32 -0700 Subject: [PATCH] x86/intel_rdt: Enable CMT and MBM on new Skylake stepping New stepping of Skylake has fixes for cache occupancy and memory bandwidth monitoring. Update the code to enable these by default on newer steppings. Signed-off-by: Tony Luck Signed-off-by: Thomas Gleixner Cc: Fenghua Yu Cc: stable@vger.kernel.org # v4.14 Cc: Vikas Shivappa Link: https://lkml.kernel.org/r/20180608160732.9842-1-tony.luck@intel.com --- arch/x86/kernel/cpu/intel_rdt.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c index 589b948e6e01..316a8875bd90 100644 --- a/arch/x86/kernel/cpu/intel_rdt.c +++ b/arch/x86/kernel/cpu/intel_rdt.c @@ -821,6 +821,8 @@ static __init void rdt_quirks(void) case INTEL_FAM6_SKYLAKE_X: if (boot_cpu_data.x86_stepping <= 4) set_rdt_options("!cmt,!mbmtotal,!mbmlocal,!l3cat"); + else + set_rdt_options("!l3cat"); } } -- 2.39.5