4.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tony Luck <tony.luck@xxxxxxxxx> commit 1d9f3e20a56d33e55748552aeec597f58542f92d upstream. 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 <tony.luck@xxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx # v4.14 Cc: Vikas Shivappa <vikas.shivappa@xxxxxxxxxxxxxxx> Link: https://lkml.kernel.org/r/20180608160732.9842-1-tony.luck@xxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/x86/kernel/cpu/intel_rdt.c | 2 ++ 1 file changed, 2 insertions(+) --- 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"); } }
